Give Carbon -> C++ thunks internal linkage. (#7040)

Also declare them `inline` since we're putting the `always_inline`
attribute on them. Use the `internal_linkage` attribute rather than
`SC_Static` since it's a more precise mechanism and matches what we do
for static member functions in reverse interop (where `SC_Static` means
something else and would not give the function internal linkage).

toolchain/check/cpp/thunk.cpp

@@ -419,19 +419,20 @@ static auto CreateThunkFunctionDecl(
       thunk_param_types, ext_proto_info);
 
   clang::DeclContext* decl_context = ast_context.getTranslationUnitDecl();
-  // TODO: Thunks should not have external linkage, consider using `SC_Static`.
-  clang::FunctionDecl* thunk_function_decl =
-      clang::FunctionDecl::Create(ast_context, decl_context, clang_loc,
-                                  clang_loc, name, thunk_function_type,
-                                  /*TInfo=*/nullptr, clang::SC_Extern);
+  clang::FunctionDecl* thunk_function_decl = clang::FunctionDecl::Create(
+      ast_context, decl_context, clang_loc, clang_loc, name,
+      thunk_function_type, /*TInfo=*/nullptr, clang::SC_None,
+      /*UsesFPIntrin=*/false, /*isInlineSpecified=*/true);
   decl_context->addDecl(thunk_function_decl);
 
   thunk_function_decl->setParams(
       BuildThunkParameters(ast_context, callee_info, thunk_function_decl));
 
-  // Set always_inline.
+  // Force the thunk to be inlined and discarded.
   thunk_function_decl->addAttr(
       clang::AlwaysInlineAttr::CreateImplicit(ast_context));
+  thunk_function_decl->addAttr(
+      clang::InternalLinkageAttr::CreateImplicit(ast_context));
 
   // Set asm("<callee function mangled name>.carbon_thunk").
   thunk_function_decl->addAttr(clang::AsmLabelAttr::CreateImplicit(

toolchain/check/testdata/basics/raw_sem_ir/cpp_interop.carbon

@@ -57,9 +57,9 @@ fn G(x: Cpp.X) {
 // CHECK:STDOUT:     clang_decl_id50000001: {key: "struct X {}", inst_id: inst50000014}
 // CHECK:STDOUT:     clang_decl_id50000002: {key: "X * _Nonnull p", inst_id: inst50000022}
 // CHECK:STDOUT:     clang_decl_id50000003: {key: {decl: "void f(X x = {})", kind: normal, num_params: 0}, inst_id: inst5000002D}
-// CHECK:STDOUT:     clang_decl_id50000004: {key: {decl: "extern void f__carbon_thunk()", kind: normal, num_params: 0}, inst_id: inst50000030}
+// CHECK:STDOUT:     clang_decl_id50000004: {key: {decl: "inline void f__carbon_thunk()", kind: normal, num_params: 0}, inst_id: inst50000030}
 // CHECK:STDOUT:     clang_decl_id50000005: {key: {decl: "void f(X x = {})", kind: normal, num_params: 1}, inst_id: inst5000003B}
-// CHECK:STDOUT:     clang_decl_id50000006: {key: {decl: "extern void f__carbon_thunk(X * _Nonnull x)", kind: normal, num_params: 1}, inst_id: inst50000043}
+// CHECK:STDOUT:     clang_decl_id50000006: {key: {decl: "inline void f__carbon_thunk(X * _Nonnull x)", kind: normal, num_params: 1}, inst_id: inst50000043}
 // CHECK:STDOUT:     clang_decl_id50000007: {key: "X * _Nonnull global", inst_id: inst5000004E}
 // CHECK:STDOUT:   name_scopes:
 // CHECK:STDOUT:     name_scope0:     {inst: instF, parent_scope: name_scope<none>, has_error: false, extended_scopes: [], names: {name(Cpp): inst50000011, name0: inst5000001D}}

toolchain/check/testdata/interop/cpp/function/thunk_ast.carbon

@@ -18,7 +18,7 @@
 auto foo(short a) -> void;
 // CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <./thunk_required.h:[[@LINE-1]]:1, col:22> col:6 used foo 'auto (short) -> void'
 // CHECK:STDOUT: | `-ParmVarDecl {{0x[a-f0-9]+}} <col:10, col:16> col:16 a 'short'
-// CHECK:STDOUT: `-FunctionDecl {{0x[a-f0-9]+}} <col:6> col:6 foo__carbon_thunk 'void (short * _Nonnull)' extern
+// CHECK:STDOUT: `-FunctionDecl {{0x[a-f0-9]+}} <col:6> col:6 foo__carbon_thunk 'void (short * _Nonnull)' inline
 // CHECK:STDOUT:   |-ParmVarDecl {{0x[a-f0-9]+}} <col:6> col:6 used a 'short * _Nonnull':'short *'
 // CHECK:STDOUT:   |-ReturnStmt {{0x[a-f0-9]+}} <col:6>
 // CHECK:STDOUT:   | `-CallExpr {{0x[a-f0-9]+}} <col:6> 'void'
@@ -29,6 +29,7 @@ auto foo(short a) -> void;
 // CHECK:STDOUT:   |       `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:6> 'short * _Nonnull':'short *' <LValueToRValue>
 // CHECK:STDOUT:   |         `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'short * _Nonnull':'short *' lvalue ParmVar {{0x[a-f0-9]+}} 'a' 'short * _Nonnull':'short *'
 // CHECK:STDOUT:   |-AlwaysInlineAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit always_inline
+// CHECK:STDOUT:   |-InternalLinkageAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit
 // CHECK:STDOUT:   `-AsmLabelAttr {{0x[a-f0-9]+}} <col:6> Implicit "_Z3foos.carbon_thunk"
 // CHECK:STDOUT: TranslationUnitDecl {{0x[a-f0-9]+}} <<invalid sloc>> <invalid sloc>
 
@@ -46,7 +47,7 @@ fn F() {
 
 auto foo() -> short;
 // CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <./return_thunk_required.h:[[@LINE-1]]:1, col:15> col:6 used foo 'auto () -> short'
-// CHECK:STDOUT: `-FunctionDecl {{0x[a-f0-9]+}} <col:6> col:6 foo__carbon_thunk 'void (short * _Nonnull)' extern
+// CHECK:STDOUT: `-FunctionDecl {{0x[a-f0-9]+}} <col:6> col:6 foo__carbon_thunk 'void (short * _Nonnull)' inline
 // CHECK:STDOUT:   |-ParmVarDecl {{0x[a-f0-9]+}} <col:6> col:6 used return 'short * _Nonnull':'short *'
 // CHECK:STDOUT:   |-CXXNewExpr {{0x[a-f0-9]+}} <col:6> 'short *' global Function {{0x[a-f0-9]+}} 'operator new' 'void *(__size_t, void *) noexcept'
 // CHECK:STDOUT:   | |-CallExpr {{0x[a-f0-9]+}} <col:6> 'short'
@@ -54,6 +55,7 @@ auto foo() -> short;
 // CHECK:STDOUT:   | |   `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'auto () -> short' Function {{0x[a-f0-9]+}} 'foo' 'auto () -> short'
 // CHECK:STDOUT:   | `-DeclRefExpr {{0x[a-f0-9]+}} <col:6> 'short * _Nonnull':'short *' lvalue ParmVar {{0x[a-f0-9]+}} 'return' 'short * _Nonnull':'short *'
 // CHECK:STDOUT:   |-AlwaysInlineAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit always_inline
+// CHECK:STDOUT:   |-InternalLinkageAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit
 // CHECK:STDOUT:   `-AsmLabelAttr {{0x[a-f0-9]+}} <col:6> Implicit "_Z3foov.carbon_thunk"
 
 // --- import_return_thunk_required.carbon

toolchain/lower/testdata/interop/cpp/extern_c.carbon

@@ -224,8 +224,15 @@ fn MyF() {
 // CHECK:STDOUT:
 // CHECK:STDOUT: %struct.X = type { i8 }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CMyF.Main(ptr sret({}) %return, ptr %a, ptr %b) #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   call void @_Zpl1XS_.carbon_thunk(ptr %a, ptr %b, ptr %return), !dbg !18
+// CHECK:STDOUT:   ret void, !dbg !19
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Zpl1XS_.carbon_thunk(ptr noundef %0, ptr noundef %1, ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_Zpl1XS_.carbon_thunk(ptr noundef %0, ptr noundef %1, ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %.addr1 = alloca ptr, align 8
@@ -233,28 +240,21 @@ fn MyF() {
 // CHECK:STDOUT:   %agg.tmp = alloca %struct.X, align 1
 // CHECK:STDOUT:   %agg.tmp2 = alloca %struct.X, align 1
 // CHECK:STDOUT:   %undef.agg.tmp = alloca %struct.X, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %2 = load ptr, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %3 = load ptr, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %4 = load ptr, ptr %.addr1, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !20
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   %2 = load ptr, ptr %return.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   %3 = load ptr, ptr %.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   %4 = load ptr, ptr %.addr1, align 8, !tbaa !20
 // CHECK:STDOUT:   call void @_Zpl1XS_()
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Zpl1XS_() #1
+// CHECK:STDOUT: declare void @_Zpl1XS_() #2
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CMyF.Main(ptr sret({}) %return, ptr %a, ptr %b) #2 !dbg !14 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Zpl1XS_.carbon_thunk(ptr %a, ptr %b, ptr %return), !dbg !21
-// CHECK:STDOUT:   ret void, !dbg !22
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -271,18 +271,18 @@ fn MyF() {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1X", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !6, line: 6, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !18)
-// CHECK:STDOUT: !15 = !DISubroutineType(types: !16)
-// CHECK:STDOUT: !16 = !{!17, !17, !17}
-// CHECK:STDOUT: !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !18 = !{!19, !20}
-// CHECK:STDOUT: !19 = !DILocalVariable(arg: 1, scope: !14, type: !17)
-// CHECK:STDOUT: !20 = !DILocalVariable(arg: 2, scope: !14, type: !17)
-// CHECK:STDOUT: !21 = !DILocation(line: 7, column: 10, scope: !14)
-// CHECK:STDOUT: !22 = !DILocation(line: 7, column: 3, scope: !14)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !15)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{!14, !14, !14}
+// CHECK:STDOUT: !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !15 = !{!16, !17}
+// CHECK:STDOUT: !16 = !DILocalVariable(arg: 1, scope: !11, type: !14)
+// CHECK:STDOUT: !17 = !DILocalVariable(arg: 2, scope: !11, type: !14)
+// CHECK:STDOUT: !18 = !DILocation(line: 7, column: 10, scope: !11)
+// CHECK:STDOUT: !19 = !DILocation(line: 7, column: 3, scope: !11)
+// CHECK:STDOUT: !20 = !{!21, !21, i64 0}
+// CHECK:STDOUT: !21 = !{!"p1 _ZTS1X", !22, i64 0}
+// CHECK:STDOUT: !22 = !{!"any pointer", !9, i64 0}
 // CHECK:STDOUT: ; ModuleID = 'import_extern_c_with_asm_label.carbon'
 // CHECK:STDOUT: source_filename = "import_extern_c_with_asm_label.carbon"
 // CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"

toolchain/lower/testdata/interop/cpp/function_decl.carbon

@@ -381,17 +381,34 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
 // CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define i32 @_CMyF.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %value.var = alloca i32, align 4, !dbg !15
+// CHECK:STDOUT:   call void @_Z13NoReturnValueii.carbon_thunk0(), !dbg !16
+// CHECK:STDOUT:   call void @_Z13NoReturnValueii.carbon_thunk1(i32 3), !dbg !17
+// CHECK:STDOUT:   call void @_Z13NoReturnValueii(i32 3, i32 4), !dbg !18
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %value.var), !dbg !15
+// CHECK:STDOUT:   %SimpleReturnValue__carbon_thunk.call.loc11 = call i32 @_Z17SimpleReturnValueii.carbon_thunk0(), !dbg !19
+// CHECK:STDOUT:   store i32 %SimpleReturnValue__carbon_thunk.call.loc11, ptr %value.var, align 4, !dbg !15
+// CHECK:STDOUT:   %SimpleReturnValue__carbon_thunk.call.loc12 = call i32 @_Z17SimpleReturnValueii.carbon_thunk1(i32 3), !dbg !20
+// CHECK:STDOUT:   store i32 %SimpleReturnValue__carbon_thunk.call.loc12, ptr %value.var, align 4, !dbg !21
+// CHECK:STDOUT:   %SimpleReturnValue.call = call i32 @_Z17SimpleReturnValueii(i32 3, i32 4), !dbg !22
+// CHECK:STDOUT:   store i32 %SimpleReturnValue.call, ptr %value.var, align 4, !dbg !23
+// CHECK:STDOUT:   %.loc14 = load i32, ptr %value.var, align 4, !dbg !24
+// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %value.var), !dbg !15
+// CHECK:STDOUT:   ret i32 %.loc14, !dbg !25
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z13NoReturnValueii.carbon_thunk0() #0 {
+// CHECK:STDOUT: define internal void @_Z13NoReturnValueii.carbon_thunk0() #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   call void @_Z13NoReturnValueii(i32 noundef 1, i32 noundef 2)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z13NoReturnValueii(i32 noundef, i32 noundef) #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z13NoReturnValueii.carbon_thunk1(i32 noundef %a) #0 {
+// CHECK:STDOUT: define internal void @_Z13NoReturnValueii.carbon_thunk1(i32 noundef %a) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %a.addr = alloca i32, align 4
 // CHECK:STDOUT:   store i32 %a, ptr %a.addr, align 4, !tbaa !7
@@ -400,17 +417,17 @@ fn MyF() -> i32 {
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z13NoReturnValueii(i32 noundef, i32 noundef) #2
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef i32 @_Z17SimpleReturnValueii.carbon_thunk0() #0 {
+// CHECK:STDOUT: define internal noundef i32 @_Z17SimpleReturnValueii.carbon_thunk0() #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %call = call noundef i32 @_Z17SimpleReturnValueii(i32 noundef 1, i32 noundef 2)
 // CHECK:STDOUT:   ret i32 %call
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef i32 @_Z17SimpleReturnValueii(i32 noundef, i32 noundef) #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef i32 @_Z17SimpleReturnValueii.carbon_thunk1(i32 noundef %a) #0 {
+// CHECK:STDOUT: define internal noundef i32 @_Z17SimpleReturnValueii.carbon_thunk1(i32 noundef %a) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %a.addr = alloca i32, align 4
 // CHECK:STDOUT:   store i32 %a, ptr %a.addr, align 4, !tbaa !7
@@ -419,27 +436,10 @@ fn MyF() -> i32 {
 // CHECK:STDOUT:   ret i32 %call
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CMyF.Main() #2 !dbg !11 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %value.var = alloca i32, align 4, !dbg !15
-// CHECK:STDOUT:   call void @_Z13NoReturnValueii.carbon_thunk0(), !dbg !16
-// CHECK:STDOUT:   call void @_Z13NoReturnValueii.carbon_thunk1(i32 3), !dbg !17
-// CHECK:STDOUT:   call void @_Z13NoReturnValueii(i32 3, i32 4), !dbg !18
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %value.var), !dbg !15
-// CHECK:STDOUT:   %SimpleReturnValue__carbon_thunk.call.loc11 = call i32 @_Z17SimpleReturnValueii.carbon_thunk0(), !dbg !19
-// CHECK:STDOUT:   store i32 %SimpleReturnValue__carbon_thunk.call.loc11, ptr %value.var, align 4, !dbg !15
-// CHECK:STDOUT:   %SimpleReturnValue__carbon_thunk.call.loc12 = call i32 @_Z17SimpleReturnValueii.carbon_thunk1(i32 3), !dbg !20
-// CHECK:STDOUT:   store i32 %SimpleReturnValue__carbon_thunk.call.loc12, ptr %value.var, align 4, !dbg !21
-// CHECK:STDOUT:   %SimpleReturnValue.call = call i32 @_Z17SimpleReturnValueii(i32 3, i32 4), !dbg !22
-// CHECK:STDOUT:   store i32 %SimpleReturnValue.call, ptr %value.var, align 4, !dbg !23
-// CHECK:STDOUT:   %.loc14 = load i32, ptr %value.var, align 4, !dbg !24
-// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %value.var), !dbg !15
-// CHECK:STDOUT:   ret i32 %.loc14, !dbg !25
-// CHECK:STDOUT: }
+// CHECK:STDOUT: declare noundef i32 @_Z17SimpleReturnValueii(i32 noundef, i32 noundef) #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #2 !dbg !26 {
+// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !26 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !31
 // CHECK:STDOUT: }
@@ -447,9 +447,13 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
 // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: ; uselistorder directives
+// CHECK:STDOUT: uselistorder ptr @_Z13NoReturnValueii, { 2, 1, 0 }
+// CHECK:STDOUT: uselistorder ptr @_Z17SimpleReturnValueii, { 2, 1, 0 }
+// CHECK:STDOUT:
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}

toolchain/lower/testdata/interop/cpp/method.carbon

@@ -83,37 +83,37 @@ fn Call(n: Cpp.NeedThunk) {
 // CHECK:STDOUT:
 // CHECK:STDOUT: $_ZNK1A6by_valEv = comdat any
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define i32 @_CUseVal.Main(ptr %a) #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %by_val__carbon_thunk.call = call i32 @_ZNK1A6by_valEv.carbon_thunk(ptr %a), !dbg !18
+// CHECK:STDOUT:   ret i32 %by_val__carbon_thunk.call, !dbg !19
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef i32 @_ZNK1A6by_valEv.carbon_thunk(ptr noundef nonnull align 8 dereferenceable(12) %this) #0 {
+// CHECK:STDOUT: define internal noundef i32 @_ZNK1A6by_valEv.carbon_thunk(ptr noundef nonnull align 8 dereferenceable(12) %this) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %this.addr, align 8, !tbaa !11, !nonnull !14, !align !15
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   %0 = load ptr, ptr %this.addr, align 8, !tbaa !20, !nonnull !23, !align !24
 // CHECK:STDOUT:   %call = call noundef i32 @_ZNK1A6by_valEv(ptr noundef nonnull align 8 dereferenceable(12) %0)
 // CHECK:STDOUT:   ret i32 %call
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local noundef i32 @_ZNK1A6by_valEv(ptr noundef nonnull align 8 dereferenceable(12) %this) #1 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local noundef i32 @_ZNK1A6by_valEv(ptr noundef nonnull align 8 dereferenceable(12) %this) #2 comdat align 2 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !20
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   %n = getelementptr inbounds nuw %struct.A, ptr %this1, i32 0, i32 1
-// CHECK:STDOUT:   %0 = load i32, ptr %n, align 8, !tbaa !16
+// CHECK:STDOUT:   %0 = load i32, ptr %n, align 8, !tbaa !25
 // CHECK:STDOUT:   ret i32 %0
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CUseVal.Main(ptr %a) #2 !dbg !19 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %by_val__carbon_thunk.call = call i32 @_ZNK1A6by_valEv.carbon_thunk(ptr %a), !dbg !26
-// CHECK:STDOUT:   ret i32 %by_val__carbon_thunk.call, !dbg !27
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -130,23 +130,23 @@ fn Call(n: Cpp.NeedThunk) {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1A", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{}
-// CHECK:STDOUT: !15 = !{i64 8}
-// CHECK:STDOUT: !16 = !{!17, !8, i64 8}
-// CHECK:STDOUT: !17 = !{!"_ZTS1A", !18, i64 0, !8, i64 8}
-// CHECK:STDOUT: !18 = !{!"_ZTS4Base"}
-// CHECK:STDOUT: !19 = distinct !DISubprogram(name: "UseVal", linkageName: "_CUseVal.Main", scope: null, file: !6, line: 6, type: !20, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !24)
-// CHECK:STDOUT: !20 = !DISubroutineType(types: !21)
-// CHECK:STDOUT: !21 = !{!22, !23}
-// CHECK:STDOUT: !22 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !24 = !{!25}
-// CHECK:STDOUT: !25 = !DILocalVariable(arg: 1, scope: !19, type: !23)
-// CHECK:STDOUT: !26 = !DILocation(line: 7, column: 10, scope: !19)
-// CHECK:STDOUT: !27 = !DILocation(line: 7, column: 3, scope: !19)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "UseVal", linkageName: "_CUseVal.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !16)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{!14, !15}
+// CHECK:STDOUT: !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !16 = !{!17}
+// CHECK:STDOUT: !17 = !DILocalVariable(arg: 1, scope: !11, type: !15)
+// CHECK:STDOUT: !18 = !DILocation(line: 7, column: 10, scope: !11)
+// CHECK:STDOUT: !19 = !DILocation(line: 7, column: 3, scope: !11)
+// CHECK:STDOUT: !20 = !{!21, !21, i64 0}
+// CHECK:STDOUT: !21 = !{!"p1 _ZTS1A", !22, i64 0}
+// CHECK:STDOUT: !22 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !23 = !{}
+// CHECK:STDOUT: !24 = !{i64 8}
+// CHECK:STDOUT: !25 = !{!26, !8, i64 8}
+// CHECK:STDOUT: !26 = !{!"_ZTS1A", !27, i64 0, !8, i64 8}
+// CHECK:STDOUT: !27 = !{!"_ZTS4Base"}
 // CHECK:STDOUT: ; ModuleID = 'call_by_ref.carbon'
 // CHECK:STDOUT: source_filename = "call_by_ref.carbon"
 // CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
@@ -268,70 +268,70 @@ fn Call(n: Cpp.NeedThunk) {
 // CHECK:STDOUT:
 // CHECK:STDOUT: @int_1.30e = internal constant i8 1
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CCall.Main(ptr %n) #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.loc7_14.3.temp = alloca i8, align 1, !dbg !17
+// CHECK:STDOUT:   %.loc8_14.3.temp = alloca i8, align 1, !dbg !18
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_14.3.temp), !dbg !17
+// CHECK:STDOUT:   call void @_ZNK9NeedThunk8ImplicitEa.carbon_thunk(ptr %n, ptr @int_1.30e), !dbg !19
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc8_14.3.temp), !dbg !18
+// CHECK:STDOUT:   call void @_ZNH9NeedThunk8ExplicitES_a.carbon_thunk(ptr %n, ptr @int_1.30e), !dbg !20
+// CHECK:STDOUT:   call void @"_COp.43bece552030817c:core.Destroy.Core"(ptr @int_1.30e), !dbg !18
+// CHECK:STDOUT:   call void @"_COp.43bece552030817c:core.Destroy.Core"(ptr @int_1.30e), !dbg !17
+// CHECK:STDOUT:   ret void, !dbg !21
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_ZNK9NeedThunk8ImplicitEa.carbon_thunk(ptr noundef nonnull align 1 dereferenceable(1) %this, ptr noundef %c) #0 {
+// CHECK:STDOUT: define internal void @_ZNK9NeedThunk8ImplicitEa.carbon_thunk(ptr noundef nonnull align 1 dereferenceable(1) %this, ptr noundef %c) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %c.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %c, ptr %c.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %0 = load ptr, ptr %this.addr, align 8, !tbaa !11, !nonnull !16
-// CHECK:STDOUT:   %1 = load ptr, ptr %c.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %2 = load i8, ptr %1, align 1, !tbaa !17
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !22
+// CHECK:STDOUT:   store ptr %c, ptr %c.addr, align 8, !tbaa !25
+// CHECK:STDOUT:   %0 = load ptr, ptr %this.addr, align 8, !tbaa !22, !nonnull !27
+// CHECK:STDOUT:   %1 = load ptr, ptr %c.addr, align 8, !tbaa !25
+// CHECK:STDOUT:   %2 = load i8, ptr %1, align 1, !tbaa !28
 // CHECK:STDOUT:   call void @_ZNK9NeedThunk8ImplicitEa(ptr noundef nonnull align 1 dereferenceable(1) %0, i8 noundef signext %2)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_ZNK9NeedThunk8ImplicitEa(ptr noundef nonnull align 1 dereferenceable(1), i8 noundef signext) #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_ZNH9NeedThunk8ExplicitES_a.carbon_thunk(ptr noundef %0, ptr noundef %c) #0 {
+// CHECK:STDOUT: define internal void @_ZNH9NeedThunk8ExplicitES_a.carbon_thunk(ptr noundef %0, ptr noundef %c) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %c.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %struct.NeedThunk, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %c, ptr %c.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %2 = load ptr, ptr %c.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %3 = load i8, ptr %2, align 1, !tbaa !17
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !22
+// CHECK:STDOUT:   store ptr %c, ptr %c.addr, align 8, !tbaa !25
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !22
+// CHECK:STDOUT:   %2 = load ptr, ptr %c.addr, align 8, !tbaa !25
+// CHECK:STDOUT:   %3 = load i8, ptr %2, align 1, !tbaa !28
 // CHECK:STDOUT:   call void @_ZNH9NeedThunk8ExplicitES_a(i8 noundef signext %3)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_ZNH9NeedThunk8ExplicitES_a(i8 noundef signext) #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CCall.Main(ptr %n) #2 !dbg !18 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc7_14.3.temp = alloca i8, align 1, !dbg !24
-// CHECK:STDOUT:   %.loc8_14.3.temp = alloca i8, align 1, !dbg !25
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_14.3.temp), !dbg !24
-// CHECK:STDOUT:   call void @_ZNK9NeedThunk8ImplicitEa.carbon_thunk(ptr %n, ptr @int_1.30e), !dbg !26
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc8_14.3.temp), !dbg !25
-// CHECK:STDOUT:   call void @_ZNH9NeedThunk8ExplicitES_a.carbon_thunk(ptr %n, ptr @int_1.30e), !dbg !27
-// CHECK:STDOUT:   call void @"_COp.43bece552030817c:core.Destroy.Core"(ptr @int_1.30e), !dbg !25
-// CHECK:STDOUT:   call void @"_COp.43bece552030817c:core.Destroy.Core"(ptr @int_1.30e), !dbg !24
-// CHECK:STDOUT:   ret void, !dbg !28
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.43bece552030817c:core.Destroy.Core"(ptr %self) #2 !dbg !29 {
+// CHECK:STDOUT: define weak_odr void @"_COp.43bece552030817c:core.Destroy.Core"(ptr %self) #0 !dbg !29 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !35
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #2
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_ZNK9NeedThunk8ImplicitEa(ptr noundef nonnull align 1 dereferenceable(1), i8 noundef signext) #3
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_ZNH9NeedThunk8ExplicitES_a(i8 noundef signext) #3
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @"_COp.43bece552030817c:core.Destroy.Core", { 1, 0 }
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
-// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #3 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -348,24 +348,24 @@ fn Call(n: Cpp.NeedThunk) {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS9NeedThunk", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{!15, !15, i64 0}
-// CHECK:STDOUT: !15 = !{!"p1 omnipotent char", !13, i64 0}
-// CHECK:STDOUT: !16 = !{}
-// CHECK:STDOUT: !17 = !{!9, !9, i64 0}
-// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !6, line: 6, type: !19, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !22)
-// CHECK:STDOUT: !19 = !DISubroutineType(types: !20)
-// CHECK:STDOUT: !20 = !{null, !21}
-// CHECK:STDOUT: !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !22 = !{!23}
-// CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !18, type: !21)
-// CHECK:STDOUT: !24 = !DILocation(line: 7, column: 14, scope: !18)
-// CHECK:STDOUT: !25 = !DILocation(line: 8, column: 14, scope: !18)
-// CHECK:STDOUT: !26 = !DILocation(line: 7, column: 3, scope: !18)
-// CHECK:STDOUT: !27 = !DILocation(line: 8, column: 3, scope: !18)
-// CHECK:STDOUT: !28 = !DILocation(line: 6, column: 1, scope: !18)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !15)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null, !14}
+// CHECK:STDOUT: !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !15 = !{!16}
+// CHECK:STDOUT: !16 = !DILocalVariable(arg: 1, scope: !11, type: !14)
+// CHECK:STDOUT: !17 = !DILocation(line: 7, column: 14, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 8, column: 14, scope: !11)
+// CHECK:STDOUT: !19 = !DILocation(line: 7, column: 3, scope: !11)
+// CHECK:STDOUT: !20 = !DILocation(line: 8, column: 3, scope: !11)
+// CHECK:STDOUT: !21 = !DILocation(line: 6, column: 1, scope: !11)
+// CHECK:STDOUT: !22 = !{!23, !23, i64 0}
+// CHECK:STDOUT: !23 = !{!"p1 _ZTS9NeedThunk", !24, i64 0}
+// CHECK:STDOUT: !24 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !25 = !{!26, !26, i64 0}
+// CHECK:STDOUT: !26 = !{!"p1 omnipotent char", !24, i64 0}
+// CHECK:STDOUT: !27 = !{}
+// CHECK:STDOUT: !28 = !{!9, !9, i64 0}
 // CHECK:STDOUT: !29 = distinct !DISubprogram(name: "Op", linkageName: "_COp.43bece552030817c:core.Destroy.Core", scope: null, file: !6, line: 8, type: !30, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !33)
 // CHECK:STDOUT: !30 = !DISubroutineType(types: !31)
 // CHECK:STDOUT: !31 = !{null, !32}

toolchain/lower/testdata/interop/cpp/nullptr.carbon

@@ -54,106 +54,102 @@ fn ConvertNullptrConstant() -> Core.Optional(i32*) {
 // CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
 // CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z11TakeNullptrDn.carbon_thunk(ptr noundef %n) #0 {
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CPassNullptr.Main() #0 !dbg !11 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %n.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %n, ptr %n.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %n.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   call void @_Z11TakeNullptrDn(ptr null)
-// CHECK:STDOUT:   ret void
+// CHECK:STDOUT:   %.loc12_18.2.temp = alloca ptr, align 8, !dbg !14
+// CHECK:STDOUT:   %.loc14_22.1.temp = alloca ptr, align 8, !dbg !15
+// CHECK:STDOUT:   %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call = call ptr @"_CConvert.NullptrT.CppCompat.Core:ImplicitAs.83dbfcd16e56a769.Core.b88d1103f417c6d4"(ptr poison), !dbg !14
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc12_18.2.temp), !dbg !14
+// CHECK:STDOUT:   store ptr %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call, ptr %.loc12_18.2.temp, align 8, !dbg !14
+// CHECK:STDOUT:   %.loc12_18.4 = load ptr, ptr %.loc12_18.2.temp, align 8, !dbg !14
+// CHECK:STDOUT:   call void @_Z7TakePtrPi(ptr %.loc12_18.4), !dbg !16
+// CHECK:STDOUT:   %Cpp.nullptr_t.as.Copy.impl.Op.call = call ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr poison), !dbg !15
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc14_22.1.temp), !dbg !15
+// CHECK:STDOUT:   store ptr %Cpp.nullptr_t.as.Copy.impl.Op.call, ptr %.loc14_22.1.temp, align 8, !dbg !15
+// CHECK:STDOUT:   call void @_Z11TakeNullptrDn.carbon_thunk(ptr %.loc14_22.1.temp), !dbg !17
+// CHECK:STDOUT:   call void @"_COp.705e422c84320121:core.Destroy.Core"(ptr %.loc14_22.1.temp), !dbg !15
+// CHECK:STDOUT:   call void @"_COp.dc33c1983710215f:core.Destroy.Core"(ptr %.loc12_18.2.temp), !dbg !14
+// CHECK:STDOUT:   ret void, !dbg !18
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z11TakeNullptrDn(ptr) #1
+// CHECK:STDOUT: declare void @_Z7TakePtrPi(ptr noundef) #1
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z13ReturnNullptrv.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_Z11TakeNullptrDn.carbon_thunk(ptr noundef %n) #2 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %call = call ptr @_Z13ReturnNullptrv()
-// CHECK:STDOUT:   store ptr %call, ptr %0, align 8, !tbaa !14
+// CHECK:STDOUT:   %n.addr = alloca ptr, align 8
+// CHECK:STDOUT:   store ptr %n, ptr %n.addr, align 8, !tbaa !19
+// CHECK:STDOUT:   %0 = load ptr, ptr %n.addr, align 8, !tbaa !19
+// CHECK:STDOUT:   call void @_Z11TakeNullptrDn(ptr null)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare ptr @_Z13ReturnNullptrv() #1
+// CHECK:STDOUT: declare ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassNullptr.Main() #2 !dbg !16 {
+// CHECK:STDOUT: define weak_odr void @"_COp.705e422c84320121:core.Destroy.Core"(ptr %self) #0 !dbg !22 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc12_18.2.temp = alloca ptr, align 8, !dbg !19
-// CHECK:STDOUT:   %.loc14_22.1.temp = alloca ptr, align 8, !dbg !20
-// CHECK:STDOUT:   %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call = call ptr @"_CConvert.NullptrT.CppCompat.Core:ImplicitAs.83dbfcd16e56a769.Core.b88d1103f417c6d4"(ptr poison), !dbg !19
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc12_18.2.temp), !dbg !19
-// CHECK:STDOUT:   store ptr %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call, ptr %.loc12_18.2.temp, align 8, !dbg !19
-// CHECK:STDOUT:   %.loc12_18.4 = load ptr, ptr %.loc12_18.2.temp, align 8, !dbg !19
-// CHECK:STDOUT:   call void @_Z7TakePtrPi(ptr %.loc12_18.4), !dbg !21
-// CHECK:STDOUT:   %Cpp.nullptr_t.as.Copy.impl.Op.call = call ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr poison), !dbg !20
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc14_22.1.temp), !dbg !20
-// CHECK:STDOUT:   store ptr %Cpp.nullptr_t.as.Copy.impl.Op.call, ptr %.loc14_22.1.temp, align 8, !dbg !20
-// CHECK:STDOUT:   call void @_Z11TakeNullptrDn.carbon_thunk(ptr %.loc14_22.1.temp), !dbg !22
-// CHECK:STDOUT:   call void @"_COp.705e422c84320121:core.Destroy.Core"(ptr %.loc14_22.1.temp), !dbg !20
-// CHECK:STDOUT:   call void @"_COp.dc33c1983710215f:core.Destroy.Core"(ptr %.loc12_18.2.temp), !dbg !19
-// CHECK:STDOUT:   ret void, !dbg !23
+// CHECK:STDOUT:   ret void, !dbg !28
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z7TakePtrPi(ptr noundef) #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: declare ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr)
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.705e422c84320121:core.Destroy.Core"(ptr %self) #2 !dbg !24 {
+// CHECK:STDOUT: define weak_odr void @"_COp.ca2ce9262234b385:core.Destroy.Core"(ptr %self) #0 !dbg !29 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !30
+// CHECK:STDOUT:   ret void, !dbg !32
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.ca2ce9262234b385:core.Destroy.Core"(ptr %self) #2 !dbg !31 {
+// CHECK:STDOUT: define weak_odr void @"_COp.dc33c1983710215f:core.Destroy.Core"(ptr %self) #0 !dbg !33 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !34
+// CHECK:STDOUT:   ret void, !dbg !36
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.dc33c1983710215f:core.Destroy.Core"(ptr %self) #2 !dbg !35 {
+// CHECK:STDOUT: define ptr @_CReturnNullptr.Main() #0 !dbg !37 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !38
+// CHECK:STDOUT:   %Cpp.nullptr_t.as.Copy.impl.Op.call = call ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr poison), !dbg !40
+// CHECK:STDOUT:   ret ptr %Cpp.nullptr_t.as.Copy.impl.Op.call, !dbg !41
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define ptr @_CReturnNullptr.Main() #2 !dbg !39 {
+// CHECK:STDOUT: define ptr @_CReturnNullptrCopy.Main() #0 !dbg !42 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %Cpp.nullptr_t.as.Copy.impl.Op.call = call ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr poison), !dbg !42
-// CHECK:STDOUT:   ret ptr %Cpp.nullptr_t.as.Copy.impl.Op.call, !dbg !43
+// CHECK:STDOUT:   %a.var = alloca ptr, align 8, !dbg !43
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %a.var), !dbg !43
+// CHECK:STDOUT:   %Cpp.nullptr_t.as.Copy.impl.Op.call.loc22 = call ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr poison), !dbg !44
+// CHECK:STDOUT:   store ptr %Cpp.nullptr_t.as.Copy.impl.Op.call.loc22, ptr %a.var, align 8, !dbg !43
+// CHECK:STDOUT:   %.loc23 = load ptr, ptr %a.var, align 8, !dbg !45
+// CHECK:STDOUT:   %Cpp.nullptr_t.as.Copy.impl.Op.call.loc23 = call ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr %.loc23), !dbg !45
+// CHECK:STDOUT:   call void @"_COp.705e422c84320121:core.Destroy.Core"(ptr %a.var), !dbg !43
+// CHECK:STDOUT:   ret ptr %Cpp.nullptr_t.as.Copy.impl.Op.call.loc23, !dbg !46
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define ptr @_CReturnNullptrCopy.Main() #2 !dbg !44 {
+// CHECK:STDOUT: define ptr @_CReturnConvertedNullptrIndirectly.Main() #0 !dbg !47 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %a.var = alloca ptr, align 8, !dbg !45
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %a.var), !dbg !45
-// CHECK:STDOUT:   %Cpp.nullptr_t.as.Copy.impl.Op.call.loc22 = call ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr poison), !dbg !46
-// CHECK:STDOUT:   store ptr %Cpp.nullptr_t.as.Copy.impl.Op.call.loc22, ptr %a.var, align 8, !dbg !45
-// CHECK:STDOUT:   %.loc23 = load ptr, ptr %a.var, align 8, !dbg !47
-// CHECK:STDOUT:   %Cpp.nullptr_t.as.Copy.impl.Op.call.loc23 = call ptr @"_COp.NullptrT.CppCompat.Core:Copy.Core"(ptr %.loc23), !dbg !47
-// CHECK:STDOUT:   call void @"_COp.705e422c84320121:core.Destroy.Core"(ptr %a.var), !dbg !45
-// CHECK:STDOUT:   ret ptr %Cpp.nullptr_t.as.Copy.impl.Op.call.loc23, !dbg !48
+// CHECK:STDOUT:   %a.var = alloca ptr, align 8, !dbg !48
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %a.var), !dbg !48
+// CHECK:STDOUT:   call void @_Z13ReturnNullptrv.carbon_thunk(ptr %a.var), !dbg !49
+// CHECK:STDOUT:   %.loc28_10 = load ptr, ptr %a.var, align 8, !dbg !50
+// CHECK:STDOUT:   %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call = call ptr @"_CConvert.NullptrT.CppCompat.Core:ImplicitAs.83dbfcd16e56a769.Core.b88d1103f417c6d4"(ptr %.loc28_10), !dbg !51
+// CHECK:STDOUT:   call void @"_COp.705e422c84320121:core.Destroy.Core"(ptr %a.var), !dbg !48
+// CHECK:STDOUT:   ret ptr %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call, !dbg !51
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define ptr @_CReturnConvertedNullptrIndirectly.Main() #2 !dbg !49 {
+// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
+// CHECK:STDOUT: define internal void @_Z13ReturnNullptrv.carbon_thunk(ptr noundef %return) #2 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %a.var = alloca ptr, align 8, !dbg !50
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %a.var), !dbg !50
-// CHECK:STDOUT:   call void @_Z13ReturnNullptrv.carbon_thunk(ptr %a.var), !dbg !51
-// CHECK:STDOUT:   %.loc28_10 = load ptr, ptr %a.var, align 8, !dbg !52
-// CHECK:STDOUT:   %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call = call ptr @"_CConvert.NullptrT.CppCompat.Core:ImplicitAs.83dbfcd16e56a769.Core.b88d1103f417c6d4"(ptr %.loc28_10), !dbg !53
-// CHECK:STDOUT:   call void @"_COp.705e422c84320121:core.Destroy.Core"(ptr %a.var), !dbg !50
-// CHECK:STDOUT:   ret ptr %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call, !dbg !53
+// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !19
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !19
+// CHECK:STDOUT:   %call = call ptr @_Z13ReturnNullptrv()
+// CHECK:STDOUT:   store ptr %call, ptr %0, align 8, !tbaa !52
+// CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define ptr @_CReturnConvertedNullptrDirectly.Main() #2 !dbg !54 {
+// CHECK:STDOUT: define ptr @_CReturnConvertedNullptrDirectly.Main() #0 !dbg !54 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.loc32_28.1.temp = alloca ptr, align 8, !dbg !55
 // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc32_28.1.temp), !dbg !55
@@ -165,14 +161,14 @@ fn ConvertNullptrConstant() -> Core.Optional(i32*) {
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define ptr @_CConvertNullptrConstant.Main() #2 !dbg !57 {
+// CHECK:STDOUT: define ptr @_CConvertNullptrConstant.Main() #0 !dbg !57 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call = call ptr @"_CConvert.NullptrT.CppCompat.Core:ImplicitAs.83dbfcd16e56a769.Core.b88d1103f417c6d4"(ptr poison), !dbg !58
 // CHECK:STDOUT:   ret ptr %Cpp.nullptr_t.as.ImplicitAs.impl.Convert.call, !dbg !58
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr ptr @"_CConvert.NullptrT.CppCompat.Core:ImplicitAs.83dbfcd16e56a769.Core.b88d1103f417c6d4"(ptr %self) #2 !dbg !59 {
+// CHECK:STDOUT: define linkonce_odr ptr @"_CConvert.NullptrT.CppCompat.Core:ImplicitAs.83dbfcd16e56a769.Core.b88d1103f417c6d4"(ptr %self) #0 !dbg !59 {
 // CHECK:STDOUT:   %1 = call ptr @_CNone.Optional.Core.95809cda2a4fffc7(), !dbg !65
 // CHECK:STDOUT:   ret ptr %1, !dbg !66
 // CHECK:STDOUT: }
@@ -183,17 +179,21 @@ fn ConvertNullptrConstant() -> Core.Optional(i32*) {
 // CHECK:STDOUT: declare ptr @_CMake.NullptrT.CppCompat.Core()
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr ptr @_CNone.Optional.Core.95809cda2a4fffc7() #2 !dbg !67 {
+// CHECK:STDOUT: define linkonce_odr ptr @_CNone.Optional.Core.95809cda2a4fffc7() #0 !dbg !67 {
 // CHECK:STDOUT:   ret ptr null, !dbg !69
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z11TakeNullptrDn(ptr) #1
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare ptr @_Z13ReturnNullptrv() #1
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @"_CConvert.NullptrT.CppCompat.Core:ImplicitAs.83dbfcd16e56a769.Core.b88d1103f417c6d4", { 3, 2, 1, 0 }
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 4, 3, 2, 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #0 = { nounwind }
 // CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: attributes #2 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
@@ -211,62 +211,62 @@ fn ConvertNullptrConstant() -> Core.Optional(i32*) {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 std::nullptr_t", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{!15, !15, i64 0}
-// CHECK:STDOUT: !15 = !{!"std::nullptr_t", !9, i64 0}
-// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "PassNullptr", linkageName: "_CPassNullptr.Main", scope: null, file: !6, line: 11, type: !17, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !17 = !DISubroutineType(types: !18)
-// CHECK:STDOUT: !18 = !{null}
-// CHECK:STDOUT: !19 = !DILocation(line: 12, column: 15, scope: !16)
-// CHECK:STDOUT: !20 = !DILocation(line: 14, column: 19, scope: !16)
-// CHECK:STDOUT: !21 = !DILocation(line: 12, column: 3, scope: !16)
-// CHECK:STDOUT: !22 = !DILocation(line: 14, column: 3, scope: !16)
-// CHECK:STDOUT: !23 = !DILocation(line: 11, column: 1, scope: !16)
-// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "Op", linkageName: "_COp.705e422c84320121:core.Destroy.Core", scope: null, file: !6, line: 14, type: !25, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !28)
-// CHECK:STDOUT: !25 = !DISubroutineType(types: !26)
-// CHECK:STDOUT: !26 = !{null, !27}
-// CHECK:STDOUT: !27 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !28 = !{!29}
-// CHECK:STDOUT: !29 = !DILocalVariable(arg: 1, scope: !24, type: !27)
-// CHECK:STDOUT: !30 = !DILocation(line: 14, column: 19, scope: !24)
-// CHECK:STDOUT: !31 = distinct !DISubprogram(name: "Op", linkageName: "_COp.ca2ce9262234b385:core.Destroy.Core", scope: null, file: !6, line: 12, type: !25, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !32)
-// CHECK:STDOUT: !32 = !{!33}
-// CHECK:STDOUT: !33 = !DILocalVariable(arg: 1, scope: !31, type: !27)
-// CHECK:STDOUT: !34 = !DILocation(line: 12, column: 15, scope: !31)
-// CHECK:STDOUT: !35 = distinct !DISubprogram(name: "Op", linkageName: "_COp.dc33c1983710215f:core.Destroy.Core", scope: null, file: !6, line: 12, type: !25, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !36)
-// CHECK:STDOUT: !36 = !{!37}
-// CHECK:STDOUT: !37 = !DILocalVariable(arg: 1, scope: !35, type: !27)
-// CHECK:STDOUT: !38 = !DILocation(line: 12, column: 15, scope: !35)
-// CHECK:STDOUT: !39 = distinct !DISubprogram(name: "ReturnNullptr", linkageName: "_CReturnNullptr.Main", scope: null, file: !6, line: 17, type: !40, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !40 = !DISubroutineType(types: !41)
-// CHECK:STDOUT: !41 = !{!27}
-// CHECK:STDOUT: !42 = !DILocation(line: 18, column: 10, scope: !39)
-// CHECK:STDOUT: !43 = !DILocation(line: 18, column: 3, scope: !39)
-// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "ReturnNullptrCopy", linkageName: "_CReturnNullptrCopy.Main", scope: null, file: !6, line: 21, type: !40, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !45 = !DILocation(line: 22, column: 3, scope: !44)
-// CHECK:STDOUT: !46 = !DILocation(line: 22, column: 26, scope: !44)
-// CHECK:STDOUT: !47 = !DILocation(line: 23, column: 10, scope: !44)
-// CHECK:STDOUT: !48 = !DILocation(line: 23, column: 3, scope: !44)
-// CHECK:STDOUT: !49 = distinct !DISubprogram(name: "ReturnConvertedNullptrIndirectly", linkageName: "_CReturnConvertedNullptrIndirectly.Main", scope: null, file: !6, line: 26, type: !40, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !50 = !DILocation(line: 27, column: 3, scope: !49)
-// CHECK:STDOUT: !51 = !DILocation(line: 27, column: 26, scope: !49)
-// CHECK:STDOUT: !52 = !DILocation(line: 28, column: 10, scope: !49)
-// CHECK:STDOUT: !53 = !DILocation(line: 28, column: 3, scope: !49)
-// CHECK:STDOUT: !54 = distinct !DISubprogram(name: "ReturnConvertedNullptrDirectly", linkageName: "_CReturnConvertedNullptrDirectly.Main", scope: null, file: !6, line: 31, type: !40, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "PassNullptr", linkageName: "_CPassNullptr.Main", scope: null, file: !6, line: 11, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 12, column: 15, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 14, column: 19, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 12, column: 3, scope: !11)
+// CHECK:STDOUT: !17 = !DILocation(line: 14, column: 3, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 11, column: 1, scope: !11)
+// CHECK:STDOUT: !19 = !{!20, !20, i64 0}
+// CHECK:STDOUT: !20 = !{!"p1 std::nullptr_t", !21, i64 0}
+// CHECK:STDOUT: !21 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !22 = distinct !DISubprogram(name: "Op", linkageName: "_COp.705e422c84320121:core.Destroy.Core", scope: null, file: !6, line: 14, type: !23, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !26)
+// CHECK:STDOUT: !23 = !DISubroutineType(types: !24)
+// CHECK:STDOUT: !24 = !{null, !25}
+// CHECK:STDOUT: !25 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !26 = !{!27}
+// CHECK:STDOUT: !27 = !DILocalVariable(arg: 1, scope: !22, type: !25)
+// CHECK:STDOUT: !28 = !DILocation(line: 14, column: 19, scope: !22)
+// CHECK:STDOUT: !29 = distinct !DISubprogram(name: "Op", linkageName: "_COp.ca2ce9262234b385:core.Destroy.Core", scope: null, file: !6, line: 12, type: !23, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !30)
+// CHECK:STDOUT: !30 = !{!31}
+// CHECK:STDOUT: !31 = !DILocalVariable(arg: 1, scope: !29, type: !25)
+// CHECK:STDOUT: !32 = !DILocation(line: 12, column: 15, scope: !29)
+// CHECK:STDOUT: !33 = distinct !DISubprogram(name: "Op", linkageName: "_COp.dc33c1983710215f:core.Destroy.Core", scope: null, file: !6, line: 12, type: !23, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !34)
+// CHECK:STDOUT: !34 = !{!35}
+// CHECK:STDOUT: !35 = !DILocalVariable(arg: 1, scope: !33, type: !25)
+// CHECK:STDOUT: !36 = !DILocation(line: 12, column: 15, scope: !33)
+// CHECK:STDOUT: !37 = distinct !DISubprogram(name: "ReturnNullptr", linkageName: "_CReturnNullptr.Main", scope: null, file: !6, line: 17, type: !38, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !38 = !DISubroutineType(types: !39)
+// CHECK:STDOUT: !39 = !{!25}
+// CHECK:STDOUT: !40 = !DILocation(line: 18, column: 10, scope: !37)
+// CHECK:STDOUT: !41 = !DILocation(line: 18, column: 3, scope: !37)
+// CHECK:STDOUT: !42 = distinct !DISubprogram(name: "ReturnNullptrCopy", linkageName: "_CReturnNullptrCopy.Main", scope: null, file: !6, line: 21, type: !38, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !43 = !DILocation(line: 22, column: 3, scope: !42)
+// CHECK:STDOUT: !44 = !DILocation(line: 22, column: 26, scope: !42)
+// CHECK:STDOUT: !45 = !DILocation(line: 23, column: 10, scope: !42)
+// CHECK:STDOUT: !46 = !DILocation(line: 23, column: 3, scope: !42)
+// CHECK:STDOUT: !47 = distinct !DISubprogram(name: "ReturnConvertedNullptrIndirectly", linkageName: "_CReturnConvertedNullptrIndirectly.Main", scope: null, file: !6, line: 26, type: !38, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !48 = !DILocation(line: 27, column: 3, scope: !47)
+// CHECK:STDOUT: !49 = !DILocation(line: 27, column: 26, scope: !47)
+// CHECK:STDOUT: !50 = !DILocation(line: 28, column: 10, scope: !47)
+// CHECK:STDOUT: !51 = !DILocation(line: 28, column: 3, scope: !47)
+// CHECK:STDOUT: !52 = !{!53, !53, i64 0}
+// CHECK:STDOUT: !53 = !{!"std::nullptr_t", !9, i64 0}
+// CHECK:STDOUT: !54 = distinct !DISubprogram(name: "ReturnConvertedNullptrDirectly", linkageName: "_CReturnConvertedNullptrDirectly.Main", scope: null, file: !6, line: 31, type: !38, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !55 = !DILocation(line: 32, column: 10, scope: !54)
 // CHECK:STDOUT: !56 = !DILocation(line: 32, column: 3, scope: !54)
-// CHECK:STDOUT: !57 = distinct !DISubprogram(name: "ConvertNullptrConstant", linkageName: "_CConvertNullptrConstant.Main", scope: null, file: !6, line: 35, type: !40, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !57 = distinct !DISubprogram(name: "ConvertNullptrConstant", linkageName: "_CConvertNullptrConstant.Main", scope: null, file: !6, line: 35, type: !38, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !58 = !DILocation(line: 36, column: 3, scope: !57)
 // CHECK:STDOUT: !59 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.NullptrT.CppCompat.Core:ImplicitAs.83dbfcd16e56a769.Core.b88d1103f417c6d4", scope: null, file: !60, line: 51, type: !61, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !63)
 // CHECK:STDOUT: !60 = !DIFile(filename: "{{.*}}/prelude/types/cpp/nullptr.carbon", directory: "")
 // CHECK:STDOUT: !61 = !DISubroutineType(types: !62)
-// CHECK:STDOUT: !62 = !{!27, !27}
+// CHECK:STDOUT: !62 = !{!25, !25}
 // CHECK:STDOUT: !63 = !{!64}
-// CHECK:STDOUT: !64 = !DILocalVariable(arg: 1, scope: !59, type: !27)
+// CHECK:STDOUT: !64 = !DILocalVariable(arg: 1, scope: !59, type: !25)
 // CHECK:STDOUT: !65 = !DILocation(line: 52, column: 14, scope: !59)
 // CHECK:STDOUT: !66 = !DILocation(line: 52, column: 7, scope: !59)
-// CHECK:STDOUT: !67 = distinct !DISubprogram(name: "None", linkageName: "_CNone.Optional.Core.95809cda2a4fffc7", scope: null, file: !68, line: 27, type: !40, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !67 = distinct !DISubprogram(name: "None", linkageName: "_CNone.Optional.Core.95809cda2a4fffc7", scope: null, file: !68, line: 27, type: !38, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !68 = !DIFile(filename: "{{.*}}/prelude/types/optional.carbon", directory: "")
 // CHECK:STDOUT: !69 = !DILocation(line: 28, column: 5, scope: !67)

toolchain/lower/testdata/interop/cpp/parameters.carbon

@@ -120,105 +120,88 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT: @_Cc.Main = global i16 0
 // CHECK:STDOUT: @llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 0, ptr @_C__global_init.Main, ptr null }]
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.loc7_19.3.temp = alloca i8, align 1, !dbg !14
+// CHECK:STDOUT:   %.loc7_22.3.temp = alloca i16, align 2, !dbg !15
+// CHECK:STDOUT:   %.loc9_21.3.temp = alloca i8, align 1, !dbg !16
+// CHECK:STDOUT:   %.loc9_24.3.temp = alloca i16, align 2, !dbg !17
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_19.3.temp), !dbg !14
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_22.3.temp), !dbg !15
+// CHECK:STDOUT:   call void @_Z11pass_signedasil.carbon_thunk(ptr @int_1.30e, ptr @int_2.305, i32 3, i64 4), !dbg !18
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_21.3.temp), !dbg !16
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_24.3.temp), !dbg !17
+// CHECK:STDOUT:   call void @_Z13pass_unsignedhtjm.carbon_thunk(ptr @int_1.e80, ptr @int_2.fb2, i32 3, i64 4), !dbg !19
+// CHECK:STDOUT:   call void @"_COp.ecaf8c3e76291eee:core.Destroy.Core"(ptr @int_2.fb2), !dbg !17
+// CHECK:STDOUT:   call void @"_COp.3de38e83520d6bec:core.Destroy.Core"(ptr @int_1.e80), !dbg !16
+// CHECK:STDOUT:   call void @"_COp.406738f1b62008ed:core.Destroy.Core"(ptr @int_2.305), !dbg !15
+// CHECK:STDOUT:   call void @"_COp.43bece552030817c:core.Destroy.Core"(ptr @int_1.30e), !dbg !14
+// CHECK:STDOUT:   ret void, !dbg !20
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z11pass_signedasil.carbon_thunk(ptr noundef %0, ptr noundef %1, i32 noundef %2, i64 noundef %3) #0 {
+// CHECK:STDOUT: define internal void @_Z11pass_signedasil.carbon_thunk(ptr noundef %0, ptr noundef %1, i32 noundef %2, i64 noundef %3) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %.addr1 = alloca ptr, align 8
 // CHECK:STDOUT:   %.addr2 = alloca i32, align 4
 // CHECK:STDOUT:   %.addr3 = alloca i64, align 8
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !14
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !21
+// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !24
 // CHECK:STDOUT:   store i32 %2, ptr %.addr2, align 4, !tbaa !7
-// CHECK:STDOUT:   store i64 %3, ptr %.addr3, align 8, !tbaa !16
-// CHECK:STDOUT:   %4 = load ptr, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %5 = load i8, ptr %4, align 1, !tbaa !18
-// CHECK:STDOUT:   %6 = load ptr, ptr %.addr1, align 8, !tbaa !14
-// CHECK:STDOUT:   %7 = load i16, ptr %6, align 2, !tbaa !19
+// CHECK:STDOUT:   store i64 %3, ptr %.addr3, align 8, !tbaa !26
+// CHECK:STDOUT:   %4 = load ptr, ptr %.addr, align 8, !tbaa !21
+// CHECK:STDOUT:   %5 = load i8, ptr %4, align 1, !tbaa !28
+// CHECK:STDOUT:   %6 = load ptr, ptr %.addr1, align 8, !tbaa !24
+// CHECK:STDOUT:   %7 = load i16, ptr %6, align 2, !tbaa !29
 // CHECK:STDOUT:   %8 = load i32, ptr %.addr2, align 4, !tbaa !7
-// CHECK:STDOUT:   %9 = load i64, ptr %.addr3, align 8, !tbaa !16
+// CHECK:STDOUT:   %9 = load i64, ptr %.addr3, align 8, !tbaa !26
 // CHECK:STDOUT:   call void @_Z11pass_signedasil(i8 noundef signext %5, i16 noundef signext %7, i32 noundef %8, i64 noundef %9)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z11pass_signedasil(i8 noundef signext, i16 noundef signext, i32 noundef, i64 noundef) #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z13pass_unsignedhtjm.carbon_thunk(ptr noundef %0, ptr noundef %1, i32 noundef %2, i64 noundef %3) #0 {
+// CHECK:STDOUT: define internal void @_Z13pass_unsignedhtjm.carbon_thunk(ptr noundef %0, ptr noundef %1, i32 noundef %2, i64 noundef %3) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %.addr1 = alloca ptr, align 8
 // CHECK:STDOUT:   %.addr2 = alloca i32, align 4
 // CHECK:STDOUT:   %.addr3 = alloca i64, align 8
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !14
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !21
+// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !24
 // CHECK:STDOUT:   store i32 %2, ptr %.addr2, align 4, !tbaa !7
-// CHECK:STDOUT:   store i64 %3, ptr %.addr3, align 8, !tbaa !16
-// CHECK:STDOUT:   %4 = load ptr, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %5 = load i8, ptr %4, align 1, !tbaa !18
-// CHECK:STDOUT:   %6 = load ptr, ptr %.addr1, align 8, !tbaa !14
-// CHECK:STDOUT:   %7 = load i16, ptr %6, align 2, !tbaa !19
+// CHECK:STDOUT:   store i64 %3, ptr %.addr3, align 8, !tbaa !26
+// CHECK:STDOUT:   %4 = load ptr, ptr %.addr, align 8, !tbaa !21
+// CHECK:STDOUT:   %5 = load i8, ptr %4, align 1, !tbaa !28
+// CHECK:STDOUT:   %6 = load ptr, ptr %.addr1, align 8, !tbaa !24
+// CHECK:STDOUT:   %7 = load i16, ptr %6, align 2, !tbaa !29
 // CHECK:STDOUT:   %8 = load i32, ptr %.addr2, align 4, !tbaa !7
-// CHECK:STDOUT:   %9 = load i64, ptr %.addr3, align 8, !tbaa !16
+// CHECK:STDOUT:   %9 = load i64, ptr %.addr3, align 8, !tbaa !26
 // CHECK:STDOUT:   call void @_Z13pass_unsignedhtjm(i8 noundef zeroext %5, i16 noundef zeroext %7, i32 noundef %8, i64 noundef %9)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z13pass_unsignedhtjm(i8 noundef zeroext, i16 noundef zeroext, i32 noundef, i64 noundef) #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z10pass_shorts.carbon_thunk(ptr noundef %0) #0 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %2 = load i16, ptr %1, align 2, !tbaa !19
-// CHECK:STDOUT:   call void @_Z10pass_shorts(i16 noundef signext %2)
-// CHECK:STDOUT:   ret void
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z10pass_shorts(i16 noundef signext) #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CMyF.Main() #2 !dbg !21 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc7_19.3.temp = alloca i8, align 1, !dbg !24
-// CHECK:STDOUT:   %.loc7_22.3.temp = alloca i16, align 2, !dbg !25
-// CHECK:STDOUT:   %.loc9_21.3.temp = alloca i8, align 1, !dbg !26
-// CHECK:STDOUT:   %.loc9_24.3.temp = alloca i16, align 2, !dbg !27
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_19.3.temp), !dbg !24
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_22.3.temp), !dbg !25
-// CHECK:STDOUT:   call void @_Z11pass_signedasil.carbon_thunk(ptr @int_1.30e, ptr @int_2.305, i32 3, i64 4), !dbg !28
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_21.3.temp), !dbg !26
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_24.3.temp), !dbg !27
-// CHECK:STDOUT:   call void @_Z13pass_unsignedhtjm.carbon_thunk(ptr @int_1.e80, ptr @int_2.fb2, i32 3, i64 4), !dbg !29
-// CHECK:STDOUT:   call void @"_COp.ecaf8c3e76291eee:core.Destroy.Core"(ptr @int_2.fb2), !dbg !27
-// CHECK:STDOUT:   call void @"_COp.3de38e83520d6bec:core.Destroy.Core"(ptr @int_1.e80), !dbg !26
-// CHECK:STDOUT:   call void @"_COp.406738f1b62008ed:core.Destroy.Core"(ptr @int_2.305), !dbg !25
-// CHECK:STDOUT:   call void @"_COp.43bece552030817c:core.Destroy.Core"(ptr @int_1.30e), !dbg !24
-// CHECK:STDOUT:   ret void, !dbg !30
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.ecaf8c3e76291eee:core.Destroy.Core"(ptr %self) #2 !dbg !31 {
+// CHECK:STDOUT: define weak_odr void @"_COp.ecaf8c3e76291eee:core.Destroy.Core"(ptr %self) #0 !dbg !31 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !37
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.3de38e83520d6bec:core.Destroy.Core"(ptr %self) #2 !dbg !38 {
+// CHECK:STDOUT: define weak_odr void @"_COp.3de38e83520d6bec:core.Destroy.Core"(ptr %self) #0 !dbg !38 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !44
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.406738f1b62008ed:core.Destroy.Core"(ptr %self) #2 !dbg !45 {
+// CHECK:STDOUT: define weak_odr void @"_COp.406738f1b62008ed:core.Destroy.Core"(ptr %self) #0 !dbg !45 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !51
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.43bece552030817c:core.Destroy.Core"(ptr %self) #2 !dbg !52 {
+// CHECK:STDOUT: define weak_odr void @"_COp.43bece552030817c:core.Destroy.Core"(ptr %self) #0 !dbg !52 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !58
 // CHECK:STDOUT: }
@@ -226,7 +209,7 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT: declare i16 @_CMakeShort.Main()
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassShort.Main(i16 %a, ptr %b) #2 !dbg !59 {
+// CHECK:STDOUT: define void @_CPassShort.Main(i16 %a, ptr %b) #0 !dbg !59 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.loc17_18.1.temp = alloca i16, align 2, !dbg !66
 // CHECK:STDOUT:   %.loc18_18.3.temp = alloca i16, align 2, !dbg !67
@@ -254,23 +237,41 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT:   ret void, !dbg !74
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
+// CHECK:STDOUT: define internal void @_Z10pass_shorts.carbon_thunk(ptr noundef %0) #1 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.addr = alloca ptr, align 8
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !24
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !24
+// CHECK:STDOUT:   %2 = load i16, ptr %1, align 2, !tbaa !29
+// CHECK:STDOUT:   call void @_Z10pass_shorts(i16 noundef signext %2)
+// CHECK:STDOUT:   ret void
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define internal void @_C__global_init.Main() #2 !dbg !75 {
+// CHECK:STDOUT: define internal void @_C__global_init.Main() #0 !dbg !75 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   store i16 poison, ptr @_Cc.Main, align 2, !dbg !76
 // CHECK:STDOUT:   ret void, !dbg !77
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z11pass_signedasil(i8 noundef signext, i16 noundef signext, i32 noundef, i64 noundef) #3
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z13pass_unsignedhtjm(i8 noundef zeroext, i16 noundef zeroext, i32 noundef, i64 noundef) #3
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z10pass_shorts(i16 noundef signext) #3
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
+// CHECK:STDOUT: uselistorder ptr @_Z10pass_shorts.carbon_thunk, { 3, 2, 1, 0 }
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 7, 6, 5, 4, 3, 2, 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
-// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #3 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -287,26 +288,26 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 omnipotent char", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{!15, !15, i64 0}
-// CHECK:STDOUT: !15 = !{!"p1 short", !13, i64 0}
-// CHECK:STDOUT: !16 = !{!17, !17, i64 0}
-// CHECK:STDOUT: !17 = !{!"long", !9, i64 0}
-// CHECK:STDOUT: !18 = !{!9, !9, i64 0}
-// CHECK:STDOUT: !19 = !{!20, !20, i64 0}
-// CHECK:STDOUT: !20 = !{!"short", !9, i64 0}
-// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !6, line: 6, type: !22, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !22 = !DISubroutineType(types: !23)
-// CHECK:STDOUT: !23 = !{null}
-// CHECK:STDOUT: !24 = !DILocation(line: 7, column: 19, scope: !21)
-// CHECK:STDOUT: !25 = !DILocation(line: 7, column: 22, scope: !21)
-// CHECK:STDOUT: !26 = !DILocation(line: 9, column: 21, scope: !21)
-// CHECK:STDOUT: !27 = !DILocation(line: 9, column: 24, scope: !21)
-// CHECK:STDOUT: !28 = !DILocation(line: 7, column: 3, scope: !21)
-// CHECK:STDOUT: !29 = !DILocation(line: 9, column: 3, scope: !21)
-// CHECK:STDOUT: !30 = !DILocation(line: 6, column: 1, scope: !21)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 7, column: 19, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 7, column: 22, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 9, column: 21, scope: !11)
+// CHECK:STDOUT: !17 = !DILocation(line: 9, column: 24, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 7, column: 3, scope: !11)
+// CHECK:STDOUT: !19 = !DILocation(line: 9, column: 3, scope: !11)
+// CHECK:STDOUT: !20 = !DILocation(line: 6, column: 1, scope: !11)
+// CHECK:STDOUT: !21 = !{!22, !22, i64 0}
+// CHECK:STDOUT: !22 = !{!"p1 omnipotent char", !23, i64 0}
+// CHECK:STDOUT: !23 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !24 = !{!25, !25, i64 0}
+// CHECK:STDOUT: !25 = !{!"p1 short", !23, i64 0}
+// CHECK:STDOUT: !26 = !{!27, !27, i64 0}
+// CHECK:STDOUT: !27 = !{!"long", !9, i64 0}
+// CHECK:STDOUT: !28 = !{!9, !9, i64 0}
+// CHECK:STDOUT: !29 = !{!30, !30, i64 0}
+// CHECK:STDOUT: !30 = !{!"short", !9, i64 0}
 // CHECK:STDOUT: !31 = distinct !DISubprogram(name: "Op", linkageName: "_COp.ecaf8c3e76291eee:core.Destroy.Core", scope: null, file: !6, line: 9, type: !32, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !35)
 // CHECK:STDOUT: !32 = !DISubroutineType(types: !33)
 // CHECK:STDOUT: !33 = !{null, !34}
@@ -351,7 +352,7 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT: !72 = !DILocation(line: 19, column: 3, scope: !59)
 // CHECK:STDOUT: !73 = !DILocation(line: 20, column: 3, scope: !59)
 // CHECK:STDOUT: !74 = !DILocation(line: 16, column: 1, scope: !59)
-// CHECK:STDOUT: !75 = distinct !DISubprogram(name: "__global_init", linkageName: "_C__global_init.Main", scope: null, file: !6, type: !22, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !75 = distinct !DISubprogram(name: "__global_init", linkageName: "_C__global_init.Main", scope: null, file: !6, type: !12, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !76 = !DILocation(line: 14, column: 1, scope: !75)
 // CHECK:STDOUT: !77 = !DILocation(line: 0, scope: !75)
 // CHECK:STDOUT: ; ModuleID = 'import_struct.carbon'
@@ -361,24 +362,47 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT:
 // CHECK:STDOUT: %struct.X = type { i32, i32, i32 }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CTest.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %x.var = alloca [12 x i8], align 1, !dbg !14
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %x.var), !dbg !14
+// CHECK:STDOUT:   call void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.64f6b96556a8f2d4"(ptr %x.var), !dbg !14
+// CHECK:STDOUT:   %.loc8_4.a = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 0, !dbg !15
+// CHECK:STDOUT:   store i32 1, ptr %.loc8_4.a, align 4, !dbg !15
+// CHECK:STDOUT:   %.loc9_4.b = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 4, !dbg !16
+// CHECK:STDOUT:   store i32 2, ptr %.loc9_4.b, align 4, !dbg !16
+// CHECK:STDOUT:   %.loc10_4.c = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 8, !dbg !17
+// CHECK:STDOUT:   store i32 3, ptr %.loc10_4.c, align 4, !dbg !17
+// CHECK:STDOUT:   call void @_Z11pass_struct1X.carbon_thunk(ptr %x.var), !dbg !18
+// CHECK:STDOUT:   ret void, !dbg !19
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
-// CHECK:STDOUT: define dso_local void @_ZN1XC1Ev.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_ZN1XC1Ev.carbon_thunk(ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !20
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
+// CHECK:STDOUT: define void @"_COp:thunk.X.Cpp"(ptr sret([12 x i8]) %return) #2 !dbg !23 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   call void @_ZN1XC1Ev.carbon_thunk(ptr %return), !dbg !28
+// CHECK:STDOUT:   ret void, !dbg !28
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z11pass_struct1X.carbon_thunk(ptr noundef %0) #1 {
+// CHECK:STDOUT: define internal void @_Z11pass_struct1X.carbon_thunk(ptr noundef %0) #3 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %struct.X, align 4
 // CHECK:STDOUT:   %agg.tmp.coerce = alloca { i64, i32 }, align 4
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 4 %agg.tmp, ptr align 4 %1, i64 12, i1 false), !tbaa.struct !14
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 4 %agg.tmp, ptr align 4 %1, i64 12, i1 false), !tbaa.struct !29
 // CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 4 %agg.tmp.coerce, ptr align 4 %agg.tmp, i64 12, i1 false)
 // CHECK:STDOUT:   %2 = getelementptr inbounds nuw { i64, i32 }, ptr %agg.tmp.coerce, i32 0, i32 0
 // CHECK:STDOUT:   %3 = load i64, ptr %2, align 4
@@ -388,53 +412,30 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z11pass_struct1X(i64, i32) #2
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #3
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CTest.Main() #4 !dbg !15 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %x.var = alloca [12 x i8], align 1, !dbg !18
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %x.var), !dbg !18
-// CHECK:STDOUT:   call void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.64f6b96556a8f2d4"(ptr %x.var), !dbg !18
-// CHECK:STDOUT:   %.loc8_4.a = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 0, !dbg !19
-// CHECK:STDOUT:   store i32 1, ptr %.loc8_4.a, align 4, !dbg !19
-// CHECK:STDOUT:   %.loc9_4.b = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 4, !dbg !20
-// CHECK:STDOUT:   store i32 2, ptr %.loc9_4.b, align 4, !dbg !20
-// CHECK:STDOUT:   %.loc10_4.c = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 8, !dbg !21
-// CHECK:STDOUT:   store i32 3, ptr %.loc10_4.c, align 4, !dbg !21
-// CHECK:STDOUT:   call void @_Z11pass_struct1X.carbon_thunk(ptr %x.var), !dbg !22
-// CHECK:STDOUT:   ret void, !dbg !23
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
-// CHECK:STDOUT: define void @"_COp:thunk.X.Cpp"(ptr sret([12 x i8]) %return) #5 !dbg !24 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_ZN1XC1Ev.carbon_thunk(ptr %return), !dbg !29
-// CHECK:STDOUT:   ret void, !dbg !29
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #6
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #4
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.64f6b96556a8f2d4"(ptr sret([12 x i8]) %return) #4 !dbg !30 {
+// CHECK:STDOUT: define linkonce_odr void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.64f6b96556a8f2d4"(ptr sret([12 x i8]) %return) #0 !dbg !30 {
 // CHECK:STDOUT:   call void @"_COp:thunk.X.Cpp"(ptr %return), !dbg !32
 // CHECK:STDOUT:   ret void, !dbg !33
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z11pass_struct1X(i64, i32) #5
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
+// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #6
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @llvm.memcpy.p0.p0.i64, { 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #3 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
-// CHECK:STDOUT: attributes #4 = { nounwind }
-// CHECK:STDOUT: attributes #5 = { alwaysinline nounwind }
-// CHECK:STDOUT: attributes #6 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { alwaysinline nounwind }
+// CHECK:STDOUT: attributes #3 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #5 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #6 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -451,26 +452,26 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1X", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{i64 0, i64 4, !7, i64 4, i64 4, !7, i64 8, i64 4, !7}
-// CHECK:STDOUT: !15 = distinct !DISubprogram(name: "Test", linkageName: "_CTest.Main", scope: null, file: !6, line: 6, type: !16, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !16 = !DISubroutineType(types: !17)
-// CHECK:STDOUT: !17 = !{null}
-// CHECK:STDOUT: !18 = !DILocation(line: 7, column: 3, scope: !15)
-// CHECK:STDOUT: !19 = !DILocation(line: 8, column: 3, scope: !15)
-// CHECK:STDOUT: !20 = !DILocation(line: 9, column: 3, scope: !15)
-// CHECK:STDOUT: !21 = !DILocation(line: 10, column: 3, scope: !15)
-// CHECK:STDOUT: !22 = !DILocation(line: 11, column: 3, scope: !15)
-// CHECK:STDOUT: !23 = !DILocation(line: 6, column: 1, scope: !15)
-// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk.X.Cpp", scope: null, file: !25, line: 2, type: !26, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !25 = !DIFile(filename: "./struct.h", directory: "")
-// CHECK:STDOUT: !26 = !DISubroutineType(types: !27)
-// CHECK:STDOUT: !27 = !{!28}
-// CHECK:STDOUT: !28 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !29 = !DILocation(line: 2, column: 8, scope: !24)
-// CHECK:STDOUT: !30 = distinct !DISubprogram(name: "Op", linkageName: "_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.64f6b96556a8f2d4", scope: null, file: !31, line: 9, type: !26, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Test", linkageName: "_CTest.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 7, column: 3, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 8, column: 3, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 9, column: 3, scope: !11)
+// CHECK:STDOUT: !17 = !DILocation(line: 10, column: 3, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 11, column: 3, scope: !11)
+// CHECK:STDOUT: !19 = !DILocation(line: 6, column: 1, scope: !11)
+// CHECK:STDOUT: !20 = !{!21, !21, i64 0}
+// CHECK:STDOUT: !21 = !{!"p1 _ZTS1X", !22, i64 0}
+// CHECK:STDOUT: !22 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !23 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk.X.Cpp", scope: null, file: !24, line: 2, type: !25, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !24 = !DIFile(filename: "./struct.h", directory: "")
+// CHECK:STDOUT: !25 = !DISubroutineType(types: !26)
+// CHECK:STDOUT: !26 = !{!27}
+// CHECK:STDOUT: !27 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !28 = !DILocation(line: 2, column: 8, scope: !23)
+// CHECK:STDOUT: !29 = !{i64 0, i64 4, !7, i64 4, i64 4, !7, i64 8, i64 4, !7}
+// CHECK:STDOUT: !30 = distinct !DISubprogram(name: "Op", linkageName: "_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.64f6b96556a8f2d4", scope: null, file: !31, line: 9, type: !25, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !31 = !DIFile(filename: "min_prelude/parts/default.carbon", directory: "")
 // CHECK:STDOUT: !32 = !DILocation(line: 9, column: 28, scope: !30)
 // CHECK:STDOUT: !33 = !DILocation(line: 9, column: 21, scope: !30)
@@ -481,41 +482,37 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT:
 // CHECK:STDOUT: %class.Y = type { i32, i32, i32 }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CPassRefExpr.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %y.var = alloca [12 x i8], align 1, !dbg !14
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %y.var), !dbg !14
+// CHECK:STDOUT:   %.loc8_4.a = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 0, !dbg !15
+// CHECK:STDOUT:   store i32 1, ptr %.loc8_4.a, align 4, !dbg !15
+// CHECK:STDOUT:   %.loc9_4.b = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 4, !dbg !16
+// CHECK:STDOUT:   store i32 2, ptr %.loc9_4.b, align 4, !dbg !16
+// CHECK:STDOUT:   %.loc10_4.c = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 8, !dbg !17
+// CHECK:STDOUT:   store i32 3, ptr %.loc10_4.c, align 4, !dbg !17
+// CHECK:STDOUT:   call void @_Z11pass_struct1Y.carbon_thunk(ptr %y.var), !dbg !18
+// CHECK:STDOUT:   ret void, !dbg !19
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z11pass_struct1Y.carbon_thunk(ptr noundef %0) #0 {
+// CHECK:STDOUT: define internal void @_Z11pass_struct1Y.carbon_thunk(ptr noundef %0) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %class.Y, align 4
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !20
 // CHECK:STDOUT:   call void @_ZN1YC1ERKS_(ptr noundef nonnull align 4 dereferenceable(12) %agg.tmp, ptr noundef nonnull align 4 dereferenceable(12) %1)
 // CHECK:STDOUT:   call void @_Z11pass_struct1Y(ptr noundef dead_on_return %agg.tmp)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z11pass_struct1Y(ptr noundef dead_on_return) #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_ZN1YC1ERKS_(ptr noundef nonnull align 4 dereferenceable(12), ptr noundef nonnull align 4 dereferenceable(12)) unnamed_addr #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassRefExpr.Main() #2 !dbg !14 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %y.var = alloca [12 x i8], align 1, !dbg !17
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %y.var), !dbg !17
-// CHECK:STDOUT:   %.loc8_4.a = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 0, !dbg !18
-// CHECK:STDOUT:   store i32 1, ptr %.loc8_4.a, align 4, !dbg !18
-// CHECK:STDOUT:   %.loc9_4.b = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 4, !dbg !19
-// CHECK:STDOUT:   store i32 2, ptr %.loc9_4.b, align 4, !dbg !19
-// CHECK:STDOUT:   %.loc10_4.c = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 8, !dbg !20
-// CHECK:STDOUT:   store i32 3, ptr %.loc10_4.c, align 4, !dbg !20
-// CHECK:STDOUT:   call void @_Z11pass_struct1Y.carbon_thunk(ptr %y.var), !dbg !21
-// CHECK:STDOUT:   ret void, !dbg !22
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_CMake.Main(ptr sret([12 x i8]))
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassInitExpr.Main() #2 !dbg !23 {
+// CHECK:STDOUT: define void @_CPassInitExpr.Main() #0 !dbg !23 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.loc17_24.1.temp = alloca [12 x i8], align 1, !dbg !24
 // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc17_24.1.temp), !dbg !24
@@ -525,22 +522,26 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassValueExpr.Main(ptr %y) #2 !dbg !27 {
+// CHECK:STDOUT: define void @_CPassValueExpr.Main(ptr %y) #0 !dbg !27 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   call void @_Z11pass_struct1Y.carbon_thunk(ptr %y), !dbg !33
 // CHECK:STDOUT:   ret void, !dbg !34
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #2
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z11pass_struct1Y(ptr noundef dead_on_return) #3
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_ZN1YC1ERKS_(ptr noundef nonnull align 4 dereferenceable(12), ptr noundef nonnull align 4 dereferenceable(12)) unnamed_addr #3
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
-// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #3 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -557,19 +558,19 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1Y", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = distinct !DISubprogram(name: "PassRefExpr", linkageName: "_CPassRefExpr.Main", scope: null, file: !6, line: 6, type: !15, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !15 = !DISubroutineType(types: !16)
-// CHECK:STDOUT: !16 = !{null}
-// CHECK:STDOUT: !17 = !DILocation(line: 7, column: 3, scope: !14)
-// CHECK:STDOUT: !18 = !DILocation(line: 8, column: 3, scope: !14)
-// CHECK:STDOUT: !19 = !DILocation(line: 9, column: 3, scope: !14)
-// CHECK:STDOUT: !20 = !DILocation(line: 10, column: 3, scope: !14)
-// CHECK:STDOUT: !21 = !DILocation(line: 11, column: 3, scope: !14)
-// CHECK:STDOUT: !22 = !DILocation(line: 6, column: 1, scope: !14)
-// CHECK:STDOUT: !23 = distinct !DISubprogram(name: "PassInitExpr", linkageName: "_CPassInitExpr.Main", scope: null, file: !6, line: 16, type: !15, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "PassRefExpr", linkageName: "_CPassRefExpr.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 7, column: 3, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 8, column: 3, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 9, column: 3, scope: !11)
+// CHECK:STDOUT: !17 = !DILocation(line: 10, column: 3, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 11, column: 3, scope: !11)
+// CHECK:STDOUT: !19 = !DILocation(line: 6, column: 1, scope: !11)
+// CHECK:STDOUT: !20 = !{!21, !21, i64 0}
+// CHECK:STDOUT: !21 = !{!"p1 _ZTS1Y", !22, i64 0}
+// CHECK:STDOUT: !22 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !23 = distinct !DISubprogram(name: "PassInitExpr", linkageName: "_CPassInitExpr.Main", scope: null, file: !6, line: 16, type: !12, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !24 = !DILocation(line: 17, column: 19, scope: !23)
 // CHECK:STDOUT: !25 = !DILocation(line: 17, column: 3, scope: !23)
 // CHECK:STDOUT: !26 = !DILocation(line: 16, column: 1, scope: !23)

toolchain/lower/testdata/interop/cpp/pointer.carbon

@@ -107,62 +107,62 @@ fn Convert() {
 // CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
 // CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z16TakePtrWithThunkP1Ci.carbon_thunk1(ptr noundef %0) #0 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   call void @_Z16TakePtrWithThunkP1Ci(ptr noundef %1, i32 noundef 0)
-// CHECK:STDOUT:   ret void
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z16TakePtrWithThunkP1Ci(ptr noundef, i32 noundef) #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef ptr @_Z18ReturnPtrWithThunki.carbon_thunk0() #0 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %call = call noundef ptr @_Z18ReturnPtrWithThunki(i32 noundef 0)
-// CHECK:STDOUT:   ret ptr %call
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef ptr @_Z18ReturnPtrWithThunki(i32 noundef) #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassPtr.Main(ptr %p) #2 !dbg !14 {
+// CHECK:STDOUT: define void @_CPassPtr.Main(ptr %p) #0 !dbg !11 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z7TakePtrP1C(ptr %p), !dbg !20
-// CHECK:STDOUT:   ret void, !dbg !21
+// CHECK:STDOUT:   call void @_Z7TakePtrP1C(ptr %p), !dbg !17
+// CHECK:STDOUT:   ret void, !dbg !18
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_Z7TakePtrP1C(ptr noundef) #1
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define ptr @_CReturnPtr.Main() #2 !dbg !22 {
+// CHECK:STDOUT: define ptr @_CReturnPtr.Main() #0 !dbg !19 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %ReturnPtr.call = call ptr @_Z9ReturnPtrv(), !dbg !25
-// CHECK:STDOUT:   ret ptr %ReturnPtr.call, !dbg !26
+// CHECK:STDOUT:   %ReturnPtr.call = call ptr @_Z9ReturnPtrv(), !dbg !22
+// CHECK:STDOUT:   ret ptr %ReturnPtr.call, !dbg !23
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare noundef ptr @_Z9ReturnPtrv() #1
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassPtrWithThunk.Main(ptr %p) #2 !dbg !27 {
+// CHECK:STDOUT: define void @_CPassPtrWithThunk.Main(ptr %p) #0 !dbg !24 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z16TakePtrWithThunkP1Ci.carbon_thunk1(ptr %p), !dbg !30
-// CHECK:STDOUT:   ret void, !dbg !31
+// CHECK:STDOUT:   call void @_Z16TakePtrWithThunkP1Ci.carbon_thunk1(ptr %p), !dbg !27
+// CHECK:STDOUT:   ret void, !dbg !28
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
+// CHECK:STDOUT: define internal void @_Z16TakePtrWithThunkP1Ci.carbon_thunk1(ptr noundef %0) #2 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.addr = alloca ptr, align 8
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !29
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !29
+// CHECK:STDOUT:   call void @_Z16TakePtrWithThunkP1Ci(ptr noundef %1, i32 noundef 0)
+// CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define ptr @_CReturnPtrWithThunk.Main() #2 !dbg !32 {
+// CHECK:STDOUT: define ptr @_CReturnPtrWithThunk.Main() #0 !dbg !32 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %ReturnPtrWithThunk__carbon_thunk.call = call ptr @_Z18ReturnPtrWithThunki.carbon_thunk0(), !dbg !33
 // CHECK:STDOUT:   ret ptr %ReturnPtrWithThunk__carbon_thunk.call, !dbg !34
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
+// CHECK:STDOUT: define internal noundef ptr @_Z18ReturnPtrWithThunki.carbon_thunk0() #2 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %call = call noundef ptr @_Z18ReturnPtrWithThunki(i32 noundef 0)
+// CHECK:STDOUT:   ret ptr %call
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z16TakePtrWithThunkP1Ci(ptr noundef, i32 noundef) #1
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare noundef ptr @_Z18ReturnPtrWithThunki(i32 noundef) #1
+// CHECK:STDOUT:
+// CHECK:STDOUT: attributes #0 = { nounwind }
 // CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: attributes #2 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -179,28 +179,28 @@ fn Convert() {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1C", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = distinct !DISubprogram(name: "PassPtr", linkageName: "_CPassPtr.Main", scope: null, file: !6, line: 14, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !18)
-// CHECK:STDOUT: !15 = !DISubroutineType(types: !16)
-// CHECK:STDOUT: !16 = !{null, !17}
-// CHECK:STDOUT: !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !18 = !{!19}
-// CHECK:STDOUT: !19 = !DILocalVariable(arg: 1, scope: !14, type: !17)
-// CHECK:STDOUT: !20 = !DILocation(line: 15, column: 3, scope: !14)
-// CHECK:STDOUT: !21 = !DILocation(line: 14, column: 1, scope: !14)
-// CHECK:STDOUT: !22 = distinct !DISubprogram(name: "ReturnPtr", linkageName: "_CReturnPtr.Main", scope: null, file: !6, line: 18, type: !23, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !23 = !DISubroutineType(types: !24)
-// CHECK:STDOUT: !24 = !{!17}
-// CHECK:STDOUT: !25 = !DILocation(line: 19, column: 10, scope: !22)
-// CHECK:STDOUT: !26 = !DILocation(line: 19, column: 3, scope: !22)
-// CHECK:STDOUT: !27 = distinct !DISubprogram(name: "PassPtrWithThunk", linkageName: "_CPassPtrWithThunk.Main", scope: null, file: !6, line: 22, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !28)
-// CHECK:STDOUT: !28 = !{!29}
-// CHECK:STDOUT: !29 = !DILocalVariable(arg: 1, scope: !27, type: !17)
-// CHECK:STDOUT: !30 = !DILocation(line: 23, column: 3, scope: !27)
-// CHECK:STDOUT: !31 = !DILocation(line: 22, column: 1, scope: !27)
-// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "ReturnPtrWithThunk", linkageName: "_CReturnPtrWithThunk.Main", scope: null, file: !6, line: 26, type: !23, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "PassPtr", linkageName: "_CPassPtr.Main", scope: null, file: !6, line: 14, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !15)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null, !14}
+// CHECK:STDOUT: !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !15 = !{!16}
+// CHECK:STDOUT: !16 = !DILocalVariable(arg: 1, scope: !11, type: !14)
+// CHECK:STDOUT: !17 = !DILocation(line: 15, column: 3, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 14, column: 1, scope: !11)
+// CHECK:STDOUT: !19 = distinct !DISubprogram(name: "ReturnPtr", linkageName: "_CReturnPtr.Main", scope: null, file: !6, line: 18, type: !20, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !20 = !DISubroutineType(types: !21)
+// CHECK:STDOUT: !21 = !{!14}
+// CHECK:STDOUT: !22 = !DILocation(line: 19, column: 10, scope: !19)
+// CHECK:STDOUT: !23 = !DILocation(line: 19, column: 3, scope: !19)
+// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "PassPtrWithThunk", linkageName: "_CPassPtrWithThunk.Main", scope: null, file: !6, line: 22, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !25)
+// CHECK:STDOUT: !25 = !{!26}
+// CHECK:STDOUT: !26 = !DILocalVariable(arg: 1, scope: !24, type: !14)
+// CHECK:STDOUT: !27 = !DILocation(line: 23, column: 3, scope: !24)
+// CHECK:STDOUT: !28 = !DILocation(line: 22, column: 1, scope: !24)
+// CHECK:STDOUT: !29 = !{!30, !30, i64 0}
+// CHECK:STDOUT: !30 = !{!"p1 _ZTS1C", !31, i64 0}
+// CHECK:STDOUT: !31 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "ReturnPtrWithThunk", linkageName: "_CReturnPtrWithThunk.Main", scope: null, file: !6, line: 26, type: !20, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !33 = !DILocation(line: 27, column: 10, scope: !32)
 // CHECK:STDOUT: !34 = !DILocation(line: 27, column: 3, scope: !32)
 // CHECK:STDOUT: ; ModuleID = 'nullable.carbon'
@@ -208,97 +208,93 @@ fn Convert() {
 // CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
 // CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z16TakePtrWithThunkP1Ci.carbon_thunk1(ptr noundef %0) #0 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   call void @_Z16TakePtrWithThunkP1Ci(ptr noundef %1, i32 noundef 0)
-// CHECK:STDOUT:   ret void
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z16TakePtrWithThunkP1Ci(ptr noundef, i32 noundef) #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef ptr @_Z18ReturnPtrWithThunki.carbon_thunk0() #0 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %call = call noundef ptr @_Z18ReturnPtrWithThunki(i32 noundef 0)
-// CHECK:STDOUT:   ret ptr %call
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef ptr @_Z18ReturnPtrWithThunki(i32 noundef) #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassPtr.Main(ptr %_) #2 !dbg !14 {
+// CHECK:STDOUT: define void @_CPassPtr.Main(ptr %_) #0 !dbg !11 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !20
+// CHECK:STDOUT:   ret void, !dbg !17
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassNonnullPtr.Main(ptr %p) #2 !dbg !21 {
+// CHECK:STDOUT: define void @_CPassNonnullPtr.Main(ptr %p) #0 !dbg !18 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc22_15.2.temp = alloca ptr, align 8, !dbg !24
-// CHECK:STDOUT:   %U.binding.as_type.as.ImplicitAs.impl.Convert.call = call ptr @"_CConvert.e5cf8fcbb4feaae2:ImplicitAs.0f95c9e18c91e00a.Core.e76fd6d2be138e4a"(ptr %p), !dbg !24
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc22_15.2.temp), !dbg !24
-// CHECK:STDOUT:   store ptr %U.binding.as_type.as.ImplicitAs.impl.Convert.call, ptr %.loc22_15.2.temp, align 8, !dbg !24
-// CHECK:STDOUT:   %.loc22_15.4 = load ptr, ptr %.loc22_15.2.temp, align 8, !dbg !24
-// CHECK:STDOUT:   call void @_Z7TakePtrP1C(ptr %.loc22_15.4), !dbg !25
-// CHECK:STDOUT:   call void @"_COp.b17d31fafee11ec0:core.Destroy.Core"(ptr %.loc22_15.2.temp), !dbg !24
-// CHECK:STDOUT:   ret void, !dbg !26
+// CHECK:STDOUT:   %.loc22_15.2.temp = alloca ptr, align 8, !dbg !21
+// CHECK:STDOUT:   %U.binding.as_type.as.ImplicitAs.impl.Convert.call = call ptr @"_CConvert.e5cf8fcbb4feaae2:ImplicitAs.0f95c9e18c91e00a.Core.e76fd6d2be138e4a"(ptr %p), !dbg !21
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc22_15.2.temp), !dbg !21
+// CHECK:STDOUT:   store ptr %U.binding.as_type.as.ImplicitAs.impl.Convert.call, ptr %.loc22_15.2.temp, align 8, !dbg !21
+// CHECK:STDOUT:   %.loc22_15.4 = load ptr, ptr %.loc22_15.2.temp, align 8, !dbg !21
+// CHECK:STDOUT:   call void @_Z7TakePtrP1C(ptr %.loc22_15.4), !dbg !22
+// CHECK:STDOUT:   call void @"_COp.b17d31fafee11ec0:core.Destroy.Core"(ptr %.loc22_15.2.temp), !dbg !21
+// CHECK:STDOUT:   ret void, !dbg !23
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_Z7TakePtrP1C(ptr noundef) #1
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.52ae03024b07a1ce:core.Destroy.Core"(ptr %self) #2 !dbg !27 {
+// CHECK:STDOUT: define weak_odr void @"_COp.52ae03024b07a1ce:core.Destroy.Core"(ptr %self) #0 !dbg !24 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !30
+// CHECK:STDOUT:   ret void, !dbg !27
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.b17d31fafee11ec0:core.Destroy.Core"(ptr %self) #2 !dbg !31 {
+// CHECK:STDOUT: define weak_odr void @"_COp.b17d31fafee11ec0:core.Destroy.Core"(ptr %self) #0 !dbg !28 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !34
+// CHECK:STDOUT:   ret void, !dbg !31
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define ptr @_CReturnPtr.Main() #2 !dbg !35 {
+// CHECK:STDOUT: define ptr @_CReturnPtr.Main() #0 !dbg !32 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %ReturnPtr.call = call ptr @_Z9ReturnPtrv(), !dbg !38
-// CHECK:STDOUT:   ret ptr %ReturnPtr.call, !dbg !39
+// CHECK:STDOUT:   %ReturnPtr.call = call ptr @_Z9ReturnPtrv(), !dbg !35
+// CHECK:STDOUT:   ret ptr %ReturnPtr.call, !dbg !36
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare noundef ptr @_Z9ReturnPtrv() #1
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassPtrWithThunk.Main(ptr %_) #2 !dbg !40 {
+// CHECK:STDOUT: define void @_CPassPtrWithThunk.Main(ptr %_) #0 !dbg !37 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !43
+// CHECK:STDOUT:   ret void, !dbg !40
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassNonnullPtrWithThunk.Main(ptr %p) #2 !dbg !44 {
+// CHECK:STDOUT: define void @_CPassNonnullPtrWithThunk.Main(ptr %p) #0 !dbg !41 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.loc35_24.2.temp = alloca ptr, align 8, !dbg !44
+// CHECK:STDOUT:   %U.binding.as_type.as.ImplicitAs.impl.Convert.call = call ptr @"_CConvert.e5cf8fcbb4feaae2:ImplicitAs.0f95c9e18c91e00a.Core.e76fd6d2be138e4a"(ptr %p), !dbg !44
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc35_24.2.temp), !dbg !44
+// CHECK:STDOUT:   store ptr %U.binding.as_type.as.ImplicitAs.impl.Convert.call, ptr %.loc35_24.2.temp, align 8, !dbg !44
+// CHECK:STDOUT:   %.loc35_24.4 = load ptr, ptr %.loc35_24.2.temp, align 8, !dbg !44
+// CHECK:STDOUT:   call void @_Z16TakePtrWithThunkP1Ci.carbon_thunk1(ptr %.loc35_24.4), !dbg !45
+// CHECK:STDOUT:   call void @"_COp.b17d31fafee11ec0:core.Destroy.Core"(ptr %.loc35_24.2.temp), !dbg !44
+// CHECK:STDOUT:   ret void, !dbg !46
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
+// CHECK:STDOUT: define internal void @_Z16TakePtrWithThunkP1Ci.carbon_thunk1(ptr noundef %0) #2 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc35_24.2.temp = alloca ptr, align 8, !dbg !47
-// CHECK:STDOUT:   %U.binding.as_type.as.ImplicitAs.impl.Convert.call = call ptr @"_CConvert.e5cf8fcbb4feaae2:ImplicitAs.0f95c9e18c91e00a.Core.e76fd6d2be138e4a"(ptr %p), !dbg !47
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc35_24.2.temp), !dbg !47
-// CHECK:STDOUT:   store ptr %U.binding.as_type.as.ImplicitAs.impl.Convert.call, ptr %.loc35_24.2.temp, align 8, !dbg !47
-// CHECK:STDOUT:   %.loc35_24.4 = load ptr, ptr %.loc35_24.2.temp, align 8, !dbg !47
-// CHECK:STDOUT:   call void @_Z16TakePtrWithThunkP1Ci.carbon_thunk1(ptr %.loc35_24.4), !dbg !48
-// CHECK:STDOUT:   call void @"_COp.b17d31fafee11ec0:core.Destroy.Core"(ptr %.loc35_24.2.temp), !dbg !47
-// CHECK:STDOUT:   ret void, !dbg !49
+// CHECK:STDOUT:   %.addr = alloca ptr, align 8
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !47
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !47
+// CHECK:STDOUT:   call void @_Z16TakePtrWithThunkP1Ci(ptr noundef %1, i32 noundef 0)
+// CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define ptr @_CReturnPtrWithThunk.Main() #2 !dbg !50 {
+// CHECK:STDOUT: define ptr @_CReturnPtrWithThunk.Main() #0 !dbg !50 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %ReturnPtrWithThunk__carbon_thunk.call = call ptr @_Z18ReturnPtrWithThunki.carbon_thunk0(), !dbg !51
 // CHECK:STDOUT:   ret ptr %ReturnPtrWithThunk__carbon_thunk.call, !dbg !52
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
+// CHECK:STDOUT: define internal noundef ptr @_Z18ReturnPtrWithThunki.carbon_thunk0() #2 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %call = call noundef ptr @_Z18ReturnPtrWithThunki(i32 noundef 0)
+// CHECK:STDOUT:   ret ptr %call
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr ptr @"_CConvert.e5cf8fcbb4feaae2:ImplicitAs.0f95c9e18c91e00a.Core.e76fd6d2be138e4a"(ptr %self) #2 !dbg !53 {
+// CHECK:STDOUT: define linkonce_odr ptr @"_CConvert.e5cf8fcbb4feaae2:ImplicitAs.0f95c9e18c91e00a.Core.e76fd6d2be138e4a"(ptr %self) #0 !dbg !53 {
 // CHECK:STDOUT:   %1 = call ptr @"_CConvert.90961d7b1ce4f089:OptionalAs.0e326e799dad0c64.Core.8f431b36581f9e63"(ptr %self), !dbg !59
 // CHECK:STDOUT:   ret ptr %1, !dbg !60
 // CHECK:STDOUT: }
@@ -307,19 +303,19 @@ fn Convert() {
 // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr ptr @"_CConvert.90961d7b1ce4f089:OptionalAs.0e326e799dad0c64.Core.8f431b36581f9e63"(ptr %self) #2 !dbg !61 {
+// CHECK:STDOUT: define linkonce_odr ptr @"_CConvert.90961d7b1ce4f089:OptionalAs.0e326e799dad0c64.Core.8f431b36581f9e63"(ptr %self) #0 !dbg !61 {
 // CHECK:STDOUT:   %1 = call ptr @_CSome.Optional.Core.8f431b36581f9e63(ptr %self), !dbg !64
 // CHECK:STDOUT:   ret ptr %1, !dbg !65
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr ptr @_CSome.Optional.Core.8f431b36581f9e63(ptr %value) #2 !dbg !66 {
+// CHECK:STDOUT: define linkonce_odr ptr @_CSome.Optional.Core.8f431b36581f9e63(ptr %value) #0 !dbg !66 {
 // CHECK:STDOUT:   %1 = call ptr @"_CSome.e8f8f92d3d08d149:OptionalStorage.Core.f53db17714b9f655"(ptr %value), !dbg !69
 // CHECK:STDOUT:   ret ptr %1, !dbg !70
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr ptr @"_CSome.e8f8f92d3d08d149:OptionalStorage.Core.f53db17714b9f655"(ptr %self) #2 !dbg !71 {
+// CHECK:STDOUT: define linkonce_odr ptr @"_CSome.e8f8f92d3d08d149:OptionalStorage.Core.f53db17714b9f655"(ptr %self) #0 !dbg !71 {
 // CHECK:STDOUT:   %1 = alloca ptr, align 8, !dbg !74
 // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %1), !dbg !74
 // CHECK:STDOUT:   store ptr poison, ptr %1, align 8, !dbg !74
@@ -329,13 +325,17 @@ fn Convert() {
 // CHECK:STDOUT:   ret ptr %2, !dbg !77
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z16TakePtrWithThunkP1Ci(ptr noundef, i32 noundef) #1
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare noundef ptr @_Z18ReturnPtrWithThunki(i32 noundef) #1
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @"_CConvert.e5cf8fcbb4feaae2:ImplicitAs.0f95c9e18c91e00a.Core.e76fd6d2be138e4a", { 1, 0 }
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 0, 2, 1 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #0 = { nounwind }
 // CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: attributes #2 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
@@ -353,69 +353,69 @@ fn Convert() {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1C", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = distinct !DISubprogram(name: "PassPtr", linkageName: "_CPassPtr.Main", scope: null, file: !6, line: 14, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !18)
-// CHECK:STDOUT: !15 = !DISubroutineType(types: !16)
-// CHECK:STDOUT: !16 = !{null, !17}
-// CHECK:STDOUT: !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !18 = !{!19}
-// CHECK:STDOUT: !19 = !DILocalVariable(arg: 1, scope: !14, type: !17)
-// CHECK:STDOUT: !20 = !DILocation(line: 14, column: 1, scope: !14)
-// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "PassNonnullPtr", linkageName: "_CPassNonnullPtr.Main", scope: null, file: !6, line: 19, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !22)
-// CHECK:STDOUT: !22 = !{!23}
-// CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !21, type: !17)
-// CHECK:STDOUT: !24 = !DILocation(line: 22, column: 15, scope: !21)
-// CHECK:STDOUT: !25 = !DILocation(line: 22, column: 3, scope: !21)
-// CHECK:STDOUT: !26 = !DILocation(line: 19, column: 1, scope: !21)
-// CHECK:STDOUT: !27 = distinct !DISubprogram(name: "Op", linkageName: "_COp.52ae03024b07a1ce:core.Destroy.Core", scope: null, file: !6, line: 22, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !28)
-// CHECK:STDOUT: !28 = !{!29}
-// CHECK:STDOUT: !29 = !DILocalVariable(arg: 1, scope: !27, type: !17)
-// CHECK:STDOUT: !30 = !DILocation(line: 22, column: 15, scope: !27)
-// CHECK:STDOUT: !31 = distinct !DISubprogram(name: "Op", linkageName: "_COp.b17d31fafee11ec0:core.Destroy.Core", scope: null, file: !6, line: 22, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !32)
-// CHECK:STDOUT: !32 = !{!33}
-// CHECK:STDOUT: !33 = !DILocalVariable(arg: 1, scope: !31, type: !17)
-// CHECK:STDOUT: !34 = !DILocation(line: 22, column: 15, scope: !31)
-// CHECK:STDOUT: !35 = distinct !DISubprogram(name: "ReturnPtr", linkageName: "_CReturnPtr.Main", scope: null, file: !6, line: 25, type: !36, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !36 = !DISubroutineType(types: !37)
-// CHECK:STDOUT: !37 = !{!17}
-// CHECK:STDOUT: !38 = !DILocation(line: 26, column: 10, scope: !35)
-// CHECK:STDOUT: !39 = !DILocation(line: 26, column: 3, scope: !35)
-// CHECK:STDOUT: !40 = distinct !DISubprogram(name: "PassPtrWithThunk", linkageName: "_CPassPtrWithThunk.Main", scope: null, file: !6, line: 29, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !41)
-// CHECK:STDOUT: !41 = !{!42}
-// CHECK:STDOUT: !42 = !DILocalVariable(arg: 1, scope: !40, type: !17)
-// CHECK:STDOUT: !43 = !DILocation(line: 29, column: 1, scope: !40)
-// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "PassNonnullPtrWithThunk", linkageName: "_CPassNonnullPtrWithThunk.Main", scope: null, file: !6, line: 34, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !45)
-// CHECK:STDOUT: !45 = !{!46}
-// CHECK:STDOUT: !46 = !DILocalVariable(arg: 1, scope: !44, type: !17)
-// CHECK:STDOUT: !47 = !DILocation(line: 35, column: 24, scope: !44)
-// CHECK:STDOUT: !48 = !DILocation(line: 35, column: 3, scope: !44)
-// CHECK:STDOUT: !49 = !DILocation(line: 34, column: 1, scope: !44)
-// CHECK:STDOUT: !50 = distinct !DISubprogram(name: "ReturnPtrWithThunk", linkageName: "_CReturnPtrWithThunk.Main", scope: null, file: !6, line: 38, type: !36, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "PassPtr", linkageName: "_CPassPtr.Main", scope: null, file: !6, line: 14, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !15)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null, !14}
+// CHECK:STDOUT: !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !15 = !{!16}
+// CHECK:STDOUT: !16 = !DILocalVariable(arg: 1, scope: !11, type: !14)
+// CHECK:STDOUT: !17 = !DILocation(line: 14, column: 1, scope: !11)
+// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "PassNonnullPtr", linkageName: "_CPassNonnullPtr.Main", scope: null, file: !6, line: 19, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !19)
+// CHECK:STDOUT: !19 = !{!20}
+// CHECK:STDOUT: !20 = !DILocalVariable(arg: 1, scope: !18, type: !14)
+// CHECK:STDOUT: !21 = !DILocation(line: 22, column: 15, scope: !18)
+// CHECK:STDOUT: !22 = !DILocation(line: 22, column: 3, scope: !18)
+// CHECK:STDOUT: !23 = !DILocation(line: 19, column: 1, scope: !18)
+// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "Op", linkageName: "_COp.52ae03024b07a1ce:core.Destroy.Core", scope: null, file: !6, line: 22, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !25)
+// CHECK:STDOUT: !25 = !{!26}
+// CHECK:STDOUT: !26 = !DILocalVariable(arg: 1, scope: !24, type: !14)
+// CHECK:STDOUT: !27 = !DILocation(line: 22, column: 15, scope: !24)
+// CHECK:STDOUT: !28 = distinct !DISubprogram(name: "Op", linkageName: "_COp.b17d31fafee11ec0:core.Destroy.Core", scope: null, file: !6, line: 22, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !29)
+// CHECK:STDOUT: !29 = !{!30}
+// CHECK:STDOUT: !30 = !DILocalVariable(arg: 1, scope: !28, type: !14)
+// CHECK:STDOUT: !31 = !DILocation(line: 22, column: 15, scope: !28)
+// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "ReturnPtr", linkageName: "_CReturnPtr.Main", scope: null, file: !6, line: 25, type: !33, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !33 = !DISubroutineType(types: !34)
+// CHECK:STDOUT: !34 = !{!14}
+// CHECK:STDOUT: !35 = !DILocation(line: 26, column: 10, scope: !32)
+// CHECK:STDOUT: !36 = !DILocation(line: 26, column: 3, scope: !32)
+// CHECK:STDOUT: !37 = distinct !DISubprogram(name: "PassPtrWithThunk", linkageName: "_CPassPtrWithThunk.Main", scope: null, file: !6, line: 29, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !38)
+// CHECK:STDOUT: !38 = !{!39}
+// CHECK:STDOUT: !39 = !DILocalVariable(arg: 1, scope: !37, type: !14)
+// CHECK:STDOUT: !40 = !DILocation(line: 29, column: 1, scope: !37)
+// CHECK:STDOUT: !41 = distinct !DISubprogram(name: "PassNonnullPtrWithThunk", linkageName: "_CPassNonnullPtrWithThunk.Main", scope: null, file: !6, line: 34, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !42)
+// CHECK:STDOUT: !42 = !{!43}
+// CHECK:STDOUT: !43 = !DILocalVariable(arg: 1, scope: !41, type: !14)
+// CHECK:STDOUT: !44 = !DILocation(line: 35, column: 24, scope: !41)
+// CHECK:STDOUT: !45 = !DILocation(line: 35, column: 3, scope: !41)
+// CHECK:STDOUT: !46 = !DILocation(line: 34, column: 1, scope: !41)
+// CHECK:STDOUT: !47 = !{!48, !48, i64 0}
+// CHECK:STDOUT: !48 = !{!"p1 _ZTS1C", !49, i64 0}
+// CHECK:STDOUT: !49 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !50 = distinct !DISubprogram(name: "ReturnPtrWithThunk", linkageName: "_CReturnPtrWithThunk.Main", scope: null, file: !6, line: 38, type: !33, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !51 = !DILocation(line: 39, column: 10, scope: !50)
 // CHECK:STDOUT: !52 = !DILocation(line: 39, column: 3, scope: !50)
 // CHECK:STDOUT: !53 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.e5cf8fcbb4feaae2:ImplicitAs.0f95c9e18c91e00a.Core.e76fd6d2be138e4a", scope: null, file: !54, line: 96, type: !55, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !57)
 // CHECK:STDOUT: !54 = !DIFile(filename: "{{.*}}/prelude/types/optional.carbon", directory: "")
 // CHECK:STDOUT: !55 = !DISubroutineType(types: !56)
-// CHECK:STDOUT: !56 = !{!17, !17}
+// CHECK:STDOUT: !56 = !{!14, !14}
 // CHECK:STDOUT: !57 = !{!58}
-// CHECK:STDOUT: !58 = !DILocalVariable(arg: 1, scope: !53, type: !17)
+// CHECK:STDOUT: !58 = !DILocalVariable(arg: 1, scope: !53, type: !14)
 // CHECK:STDOUT: !59 = !DILocation(line: 97, column: 12, scope: !53)
 // CHECK:STDOUT: !60 = !DILocation(line: 97, column: 5, scope: !53)
 // CHECK:STDOUT: !61 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.90961d7b1ce4f089:OptionalAs.0e326e799dad0c64.Core.8f431b36581f9e63", scope: null, file: !54, line: 71, type: !55, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !62)
 // CHECK:STDOUT: !62 = !{!63}
-// CHECK:STDOUT: !63 = !DILocalVariable(arg: 1, scope: !61, type: !17)
+// CHECK:STDOUT: !63 = !DILocalVariable(arg: 1, scope: !61, type: !14)
 // CHECK:STDOUT: !64 = !DILocation(line: 72, column: 12, scope: !61)
 // CHECK:STDOUT: !65 = !DILocation(line: 72, column: 5, scope: !61)
 // CHECK:STDOUT: !66 = distinct !DISubprogram(name: "Some", linkageName: "_CSome.Optional.Core.8f431b36581f9e63", scope: null, file: !54, line: 30, type: !55, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !67)
 // CHECK:STDOUT: !67 = !{!68}
-// CHECK:STDOUT: !68 = !DILocalVariable(arg: 1, scope: !66, type: !17)
+// CHECK:STDOUT: !68 = !DILocalVariable(arg: 1, scope: !66, type: !14)
 // CHECK:STDOUT: !69 = !DILocation(line: 31, column: 12, scope: !66)
 // CHECK:STDOUT: !70 = !DILocation(line: 31, column: 5, scope: !66)
 // CHECK:STDOUT: !71 = distinct !DISubprogram(name: "Some", linkageName: "_CSome.e8f8f92d3d08d149:OptionalStorage.Core.f53db17714b9f655", scope: null, file: !54, line: 150, type: !55, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !72)
 // CHECK:STDOUT: !72 = !{!73}
-// CHECK:STDOUT: !73 = !DILocalVariable(arg: 1, scope: !71, type: !17)
+// CHECK:STDOUT: !73 = !DILocalVariable(arg: 1, scope: !71, type: !14)
 // CHECK:STDOUT: !74 = !DILocation(line: 151, column: 14, scope: !71)
 // CHECK:STDOUT: !75 = !DILocation(line: 153, column: 5, scope: !71)
 // CHECK:STDOUT: !76 = !DILocation(line: 151, column: 18, scope: !71)

toolchain/lower/testdata/interop/cpp/reference.carbon

@@ -137,105 +137,97 @@ fn GetRefs() {
 // CHECK:STDOUT: @int_42.c68 = internal constant i32 42
 // CHECK:STDOUT: @C.val.loc19_20.3 = internal constant {} zeroinitializer
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CPassRefs.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %c.var = alloca {}, align 8, !dbg !14
+// CHECK:STDOUT:   %.loc19_18.2.temp = alloca {}, align 8, !dbg !15
+// CHECK:STDOUT:   %n.var = alloca i32, align 4, !dbg !16
+// CHECK:STDOUT:   %.loc24_22.3.temp = alloca i32, align 4, !dbg !17
+// CHECK:STDOUT:   %.loc25_23.2.temp = alloca i32, align 4, !dbg !18
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %c.var), !dbg !14
+// CHECK:STDOUT:   call void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b"(ptr %c.var), !dbg !14
+// CHECK:STDOUT:   call void @_Z8TakeCRefR1C(ptr %c.var), !dbg !19
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc19_18.2.temp), !dbg !15
+// CHECK:STDOUT:   call void @_Z9TakeCRRefO1C.carbon_thunk(ptr @C.val.loc19_20.3), !dbg !20
+// CHECK:STDOUT:   call void @_Z13TakeConstCRefRK1C.carbon_thunk(ptr %c.var), !dbg !21
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !16
+// CHECK:STDOUT:   store i32 poison, ptr %n.var, align 4, !dbg !16
+// CHECK:STDOUT:   call void @_Z10TakeIntRefRi(ptr %n.var), !dbg !22
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc24_22.3.temp), !dbg !17
+// CHECK:STDOUT:   call void @_Z11TakeIntRRefOi.carbon_thunk(ptr @int_42.c68), !dbg !23
+// CHECK:STDOUT:   %.loc25_23.1 = load i32, ptr %n.var, align 4, !dbg !18
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc25_23.2.temp), !dbg !18
+// CHECK:STDOUT:   store i32 %.loc25_23.1, ptr %.loc25_23.2.temp, align 4, !dbg !18
+// CHECK:STDOUT:   call void @_Z15TakeConstIntRefRKi.carbon_thunk(ptr %.loc25_23.2.temp), !dbg !24
+// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %.loc25_23.2.temp), !dbg !18
+// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr @int_42.c68), !dbg !17
+// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %n.var), !dbg !16
+// CHECK:STDOUT:   ret void, !dbg !25
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
-// CHECK:STDOUT: define dso_local void @_ZN1CC1Ev.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_ZN1CC1Ev.carbon_thunk(ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !26
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !26
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
+// CHECK:STDOUT: define void @"_COp:thunk.C.Cpp"(ptr sret({}) %return) #2 !dbg !29 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   call void @_ZN1CC1Ev.carbon_thunk(ptr %return), !dbg !33
+// CHECK:STDOUT:   ret void, !dbg !33
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z8TakeCRefR1C(ptr noundef nonnull align 1 dereferenceable(1)) #3
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z9TakeCRRefO1C.carbon_thunk(ptr noundef %0) #1 {
+// CHECK:STDOUT: define internal void @_Z9TakeCRRefO1C.carbon_thunk(ptr noundef %0) #4 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !26
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !26
 // CHECK:STDOUT:   call void @_Z9TakeCRRefO1C(ptr noundef nonnull align 1 dereferenceable(1) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z9TakeCRRefO1C(ptr noundef nonnull align 1 dereferenceable(1)) #2
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z13TakeConstCRefRK1C.carbon_thunk(ptr noundef %0) #1 {
+// CHECK:STDOUT: define internal void @_Z13TakeConstCRefRK1C.carbon_thunk(ptr noundef %0) #4 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !26
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !26
 // CHECK:STDOUT:   call void @_Z13TakeConstCRefRK1C(ptr noundef nonnull align 1 dereferenceable(1) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z13TakeConstCRefRK1C(ptr noundef nonnull align 1 dereferenceable(1)) #2
+// CHECK:STDOUT: declare void @_Z10TakeIntRefRi(ptr noundef nonnull align 4 dereferenceable(4)) #3
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z11TakeIntRRefOi.carbon_thunk(ptr noundef %0) #1 {
+// CHECK:STDOUT: define internal void @_Z11TakeIntRRefOi.carbon_thunk(ptr noundef %0) #4 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !14
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !34
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !34
 // CHECK:STDOUT:   call void @_Z11TakeIntRRefOi(ptr noundef nonnull align 4 dereferenceable(4) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z11TakeIntRRefOi(ptr noundef nonnull align 4 dereferenceable(4)) #2
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z15TakeConstIntRefRKi.carbon_thunk(ptr noundef %0) #1 {
+// CHECK:STDOUT: define internal void @_Z15TakeConstIntRefRKi.carbon_thunk(ptr noundef %0) #4 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !14
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !34
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !34
 // CHECK:STDOUT:   call void @_Z15TakeConstIntRefRKi(ptr noundef nonnull align 4 dereferenceable(4) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z15TakeConstIntRefRKi(ptr noundef nonnull align 4 dereferenceable(4)) #2
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassRefs.Main() #3 !dbg !16 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %c.var = alloca {}, align 8, !dbg !19
-// CHECK:STDOUT:   %.loc19_18.2.temp = alloca {}, align 8, !dbg !20
-// CHECK:STDOUT:   %n.var = alloca i32, align 4, !dbg !21
-// CHECK:STDOUT:   %.loc24_22.3.temp = alloca i32, align 4, !dbg !22
-// CHECK:STDOUT:   %.loc25_23.2.temp = alloca i32, align 4, !dbg !23
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %c.var), !dbg !19
-// CHECK:STDOUT:   call void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b"(ptr %c.var), !dbg !19
-// CHECK:STDOUT:   call void @_Z8TakeCRefR1C(ptr %c.var), !dbg !24
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc19_18.2.temp), !dbg !20
-// CHECK:STDOUT:   call void @_Z9TakeCRRefO1C.carbon_thunk(ptr @C.val.loc19_20.3), !dbg !25
-// CHECK:STDOUT:   call void @_Z13TakeConstCRefRK1C.carbon_thunk(ptr %c.var), !dbg !26
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !21
-// CHECK:STDOUT:   store i32 poison, ptr %n.var, align 4, !dbg !21
-// CHECK:STDOUT:   call void @_Z10TakeIntRefRi(ptr %n.var), !dbg !27
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc24_22.3.temp), !dbg !22
-// CHECK:STDOUT:   call void @_Z11TakeIntRRefOi.carbon_thunk(ptr @int_42.c68), !dbg !28
-// CHECK:STDOUT:   %.loc25_23.1 = load i32, ptr %n.var, align 4, !dbg !23
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc25_23.2.temp), !dbg !23
-// CHECK:STDOUT:   store i32 %.loc25_23.1, ptr %.loc25_23.2.temp, align 4, !dbg !23
-// CHECK:STDOUT:   call void @_Z15TakeConstIntRefRKi.carbon_thunk(ptr %.loc25_23.2.temp), !dbg !29
-// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %.loc25_23.2.temp), !dbg !23
-// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr @int_42.c68), !dbg !22
-// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %n.var), !dbg !21
-// CHECK:STDOUT:   ret void, !dbg !30
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
-// CHECK:STDOUT: define void @"_COp:thunk.C.Cpp"(ptr sret({}) %return) #4 !dbg !31 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_ZN1CC1Ev.carbon_thunk(ptr %return), !dbg !35
-// CHECK:STDOUT:   ret void, !dbg !35
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z8TakeCRefR1C(ptr noundef nonnull align 1 dereferenceable(1)) #2
-// CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z10TakeIntRefRi(ptr noundef nonnull align 4 dereferenceable(4)) #2
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #3 !dbg !36 {
+// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !36 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !42
 // CHECK:STDOUT: }
@@ -244,20 +236,28 @@ fn GetRefs() {
 // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #5
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b"(ptr sret({}) %return) #3 !dbg !43 {
+// CHECK:STDOUT: define linkonce_odr void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b"(ptr sret({}) %return) #0 !dbg !43 {
 // CHECK:STDOUT:   call void @"_COp:thunk.C.Cpp"(ptr %return), !dbg !45
 // CHECK:STDOUT:   ret void, !dbg !46
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z9TakeCRRefO1C(ptr noundef nonnull align 1 dereferenceable(1)) #3
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z13TakeConstCRefRK1C(ptr noundef nonnull align 1 dereferenceable(1)) #3
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z11TakeIntRRefOi(ptr noundef nonnull align 4 dereferenceable(4)) #3
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z15TakeConstIntRefRKi(ptr noundef nonnull align 4 dereferenceable(4)) #3
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @"_COp.7e389eab4a7e5487:core.Destroy.Core", { 2, 1, 0 }
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 4, 3, 2, 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #3 = { nounwind }
-// CHECK:STDOUT: attributes #4 = { alwaysinline nounwind }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { alwaysinline nounwind }
+// CHECK:STDOUT: attributes #3 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #4 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT: attributes #5 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
@@ -275,31 +275,31 @@ fn GetRefs() {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1C", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{!15, !15, i64 0}
-// CHECK:STDOUT: !15 = !{!"p1 int", !13, i64 0}
-// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "PassRefs", linkageName: "_CPassRefs.Main", scope: null, file: !6, line: 16, type: !17, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !17 = !DISubroutineType(types: !18)
-// CHECK:STDOUT: !18 = !{null}
-// CHECK:STDOUT: !19 = !DILocation(line: 17, column: 3, scope: !16)
-// CHECK:STDOUT: !20 = !DILocation(line: 19, column: 17, scope: !16)
-// CHECK:STDOUT: !21 = !DILocation(line: 22, column: 3, scope: !16)
-// CHECK:STDOUT: !22 = !DILocation(line: 24, column: 19, scope: !16)
-// CHECK:STDOUT: !23 = !DILocation(line: 25, column: 23, scope: !16)
-// CHECK:STDOUT: !24 = !DILocation(line: 18, column: 3, scope: !16)
-// CHECK:STDOUT: !25 = !DILocation(line: 19, column: 3, scope: !16)
-// CHECK:STDOUT: !26 = !DILocation(line: 20, column: 3, scope: !16)
-// CHECK:STDOUT: !27 = !DILocation(line: 23, column: 3, scope: !16)
-// CHECK:STDOUT: !28 = !DILocation(line: 24, column: 3, scope: !16)
-// CHECK:STDOUT: !29 = !DILocation(line: 25, column: 3, scope: !16)
-// CHECK:STDOUT: !30 = !DILocation(line: 16, column: 1, scope: !16)
-// CHECK:STDOUT: !31 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk.C.Cpp", scope: null, file: !6, line: 5, type: !32, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !32 = !DISubroutineType(types: !33)
-// CHECK:STDOUT: !33 = !{!34}
-// CHECK:STDOUT: !34 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !35 = !DILocation(line: 5, column: 7, scope: !31)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "PassRefs", linkageName: "_CPassRefs.Main", scope: null, file: !6, line: 16, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 17, column: 3, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 19, column: 17, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 22, column: 3, scope: !11)
+// CHECK:STDOUT: !17 = !DILocation(line: 24, column: 19, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 25, column: 23, scope: !11)
+// CHECK:STDOUT: !19 = !DILocation(line: 18, column: 3, scope: !11)
+// CHECK:STDOUT: !20 = !DILocation(line: 19, column: 3, scope: !11)
+// CHECK:STDOUT: !21 = !DILocation(line: 20, column: 3, scope: !11)
+// CHECK:STDOUT: !22 = !DILocation(line: 23, column: 3, scope: !11)
+// CHECK:STDOUT: !23 = !DILocation(line: 24, column: 3, scope: !11)
+// CHECK:STDOUT: !24 = !DILocation(line: 25, column: 3, scope: !11)
+// CHECK:STDOUT: !25 = !DILocation(line: 16, column: 1, scope: !11)
+// CHECK:STDOUT: !26 = !{!27, !27, i64 0}
+// CHECK:STDOUT: !27 = !{!"p1 _ZTS1C", !28, i64 0}
+// CHECK:STDOUT: !28 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !29 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk.C.Cpp", scope: null, file: !6, line: 5, type: !30, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !30 = !DISubroutineType(types: !31)
+// CHECK:STDOUT: !31 = !{!32}
+// CHECK:STDOUT: !32 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !33 = !DILocation(line: 5, column: 7, scope: !29)
+// CHECK:STDOUT: !34 = !{!35, !35, i64 0}
+// CHECK:STDOUT: !35 = !{!"p1 int", !28, i64 0}
 // CHECK:STDOUT: !36 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !6, line: 25, type: !37, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !40)
 // CHECK:STDOUT: !37 = !DISubroutineType(types: !38)
 // CHECK:STDOUT: !38 = !{null, !39}
@@ -307,7 +307,7 @@ fn GetRefs() {
 // CHECK:STDOUT: !40 = !{!41}
 // CHECK:STDOUT: !41 = !DILocalVariable(arg: 1, scope: !36, type: !39)
 // CHECK:STDOUT: !42 = !DILocation(line: 25, column: 23, scope: !36)
-// CHECK:STDOUT: !43 = distinct !DISubprogram(name: "Op", linkageName: "_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b", scope: null, file: !44, line: 9, type: !32, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !43 = distinct !DISubprogram(name: "Op", linkageName: "_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b", scope: null, file: !44, line: 9, type: !30, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !44 = !DIFile(filename: "min_prelude/parts/default.carbon", directory: "")
 // CHECK:STDOUT: !45 = !DILocation(line: 9, column: 28, scope: !43)
 // CHECK:STDOUT: !46 = !DILocation(line: 9, column: 21, scope: !43)
@@ -322,154 +322,154 @@ fn GetRefs() {
 // CHECK:STDOUT: @int_42.c68 = internal constant i32 42
 // CHECK:STDOUT: @C.val.loc20_20.3 = internal constant {} zeroinitializer
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CPassRefs.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %c.var = alloca {}, align 8, !dbg !14
+// CHECK:STDOUT:   %.loc20_18.2.temp = alloca {}, align 8, !dbg !15
+// CHECK:STDOUT:   %n.var = alloca i32, align 4, !dbg !16
+// CHECK:STDOUT:   %.loc25_22.3.temp = alloca i32, align 4, !dbg !17
+// CHECK:STDOUT:   %.loc26_23.2.temp = alloca i32, align 4, !dbg !18
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %c.var), !dbg !14
+// CHECK:STDOUT:   call void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b"(ptr %c.var), !dbg !14
+// CHECK:STDOUT:   call void @_Z8TakeCRefR1C10ForceThunk.carbon_thunk1(ptr %c.var), !dbg !19
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc20_18.2.temp), !dbg !15
+// CHECK:STDOUT:   call void @_Z9TakeCRRefRK1C10ForceThunk.carbon_thunk1(ptr @C.val.loc20_20.3), !dbg !20
+// CHECK:STDOUT:   call void @_Z13TakeConstCRefRK1C10ForceThunk.carbon_thunk1(ptr %c.var), !dbg !21
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !16
+// CHECK:STDOUT:   store i32 poison, ptr %n.var, align 4, !dbg !16
+// CHECK:STDOUT:   call void @_Z10TakeIntRefRi10ForceThunk.carbon_thunk1(ptr %n.var), !dbg !22
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc25_22.3.temp), !dbg !17
+// CHECK:STDOUT:   call void @_Z11TakeIntRRefOi10ForceThunk.carbon_thunk1(ptr @int_42.c68), !dbg !23
+// CHECK:STDOUT:   %.loc26_23.1 = load i32, ptr %n.var, align 4, !dbg !18
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc26_23.2.temp), !dbg !18
+// CHECK:STDOUT:   store i32 %.loc26_23.1, ptr %.loc26_23.2.temp, align 4, !dbg !18
+// CHECK:STDOUT:   call void @_Z15TakeConstIntRefRKi10ForceThunk.carbon_thunk1(ptr %.loc26_23.2.temp), !dbg !24
+// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %.loc26_23.2.temp), !dbg !18
+// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr @int_42.c68), !dbg !17
+// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %n.var), !dbg !16
+// CHECK:STDOUT:   ret void, !dbg !25
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
-// CHECK:STDOUT: define dso_local void @_ZN1CC1Ev.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_ZN1CC1Ev.carbon_thunk(ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !26
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !26
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
+// CHECK:STDOUT: define void @"_COp:thunk.C.Cpp"(ptr sret({}) %return) #2 !dbg !29 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   call void @_ZN1CC1Ev.carbon_thunk(ptr %return), !dbg !33
+// CHECK:STDOUT:   ret void, !dbg !33
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z8TakeCRefR1C10ForceThunk.carbon_thunk1(ptr noundef nonnull align 1 dereferenceable(1) %0) #1 {
+// CHECK:STDOUT: define internal void @_Z8TakeCRefR1C10ForceThunk.carbon_thunk1(ptr noundef nonnull align 1 dereferenceable(1) %0) #3 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11, !nonnull !14
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !26
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !26, !nonnull !34
 // CHECK:STDOUT:   call void @_Z8TakeCRefR1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z8TakeCRefR1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1)) #2
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z9TakeCRRefRK1C10ForceThunk.carbon_thunk1(ptr noundef %0) #1 {
+// CHECK:STDOUT: define internal void @_Z9TakeCRRefRK1C10ForceThunk.carbon_thunk1(ptr noundef %0) #3 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !26
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !26
 // CHECK:STDOUT:   call void @_Z9TakeCRRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z9TakeCRRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1)) #2
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z13TakeConstCRefRK1C10ForceThunk.carbon_thunk1(ptr noundef %0) #1 {
+// CHECK:STDOUT: define internal void @_Z13TakeConstCRefRK1C10ForceThunk.carbon_thunk1(ptr noundef %0) #3 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !26
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !26
 // CHECK:STDOUT:   call void @_Z13TakeConstCRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z13TakeConstCRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1)) #2
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z10TakeIntRefRi10ForceThunk.carbon_thunk1(ptr noundef nonnull align 4 dereferenceable(4) %0) #1 {
+// CHECK:STDOUT: define internal void @_Z10TakeIntRefRi10ForceThunk.carbon_thunk1(ptr noundef nonnull align 4 dereferenceable(4) %0) #3 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !15
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !15, !nonnull !14, !align !17
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !35
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !35, !nonnull !34, !align !37
 // CHECK:STDOUT:   call void @_Z10TakeIntRefRi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z10TakeIntRefRi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4)) #2
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z11TakeIntRRefOi10ForceThunk.carbon_thunk1(ptr noundef %0) #1 {
+// CHECK:STDOUT: define internal void @_Z11TakeIntRRefOi10ForceThunk.carbon_thunk1(ptr noundef %0) #3 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !15
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !15
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !35
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !35
 // CHECK:STDOUT:   call void @_Z11TakeIntRRefOi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z11TakeIntRRefOi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4)) #2
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z15TakeConstIntRefRKi10ForceThunk.carbon_thunk1(ptr noundef %0) #1 {
+// CHECK:STDOUT: define internal void @_Z15TakeConstIntRefRKi10ForceThunk.carbon_thunk1(ptr noundef %0) #3 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !15
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !15
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !35
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !35
 // CHECK:STDOUT:   call void @_Z15TakeConstIntRefRKi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4) %1)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z15TakeConstIntRefRKi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4)) #2
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassRefs.Main() #3 !dbg !18 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %c.var = alloca {}, align 8, !dbg !21
-// CHECK:STDOUT:   %.loc20_18.2.temp = alloca {}, align 8, !dbg !22
-// CHECK:STDOUT:   %n.var = alloca i32, align 4, !dbg !23
-// CHECK:STDOUT:   %.loc25_22.3.temp = alloca i32, align 4, !dbg !24
-// CHECK:STDOUT:   %.loc26_23.2.temp = alloca i32, align 4, !dbg !25
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %c.var), !dbg !21
-// CHECK:STDOUT:   call void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b"(ptr %c.var), !dbg !21
-// CHECK:STDOUT:   call void @_Z8TakeCRefR1C10ForceThunk.carbon_thunk1(ptr %c.var), !dbg !26
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc20_18.2.temp), !dbg !22
-// CHECK:STDOUT:   call void @_Z9TakeCRRefRK1C10ForceThunk.carbon_thunk1(ptr @C.val.loc20_20.3), !dbg !27
-// CHECK:STDOUT:   call void @_Z13TakeConstCRefRK1C10ForceThunk.carbon_thunk1(ptr %c.var), !dbg !28
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !23
-// CHECK:STDOUT:   store i32 poison, ptr %n.var, align 4, !dbg !23
-// CHECK:STDOUT:   call void @_Z10TakeIntRefRi10ForceThunk.carbon_thunk1(ptr %n.var), !dbg !29
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc25_22.3.temp), !dbg !24
-// CHECK:STDOUT:   call void @_Z11TakeIntRRefOi10ForceThunk.carbon_thunk1(ptr @int_42.c68), !dbg !30
-// CHECK:STDOUT:   %.loc26_23.1 = load i32, ptr %n.var, align 4, !dbg !25
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc26_23.2.temp), !dbg !25
-// CHECK:STDOUT:   store i32 %.loc26_23.1, ptr %.loc26_23.2.temp, align 4, !dbg !25
-// CHECK:STDOUT:   call void @_Z15TakeConstIntRefRKi10ForceThunk.carbon_thunk1(ptr %.loc26_23.2.temp), !dbg !31
-// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %.loc26_23.2.temp), !dbg !25
-// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr @int_42.c68), !dbg !24
-// CHECK:STDOUT:   call void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %n.var), !dbg !23
-// CHECK:STDOUT:   ret void, !dbg !32
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
-// CHECK:STDOUT: define void @"_COp:thunk.C.Cpp"(ptr sret({}) %return) #4 !dbg !33 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_ZN1CC1Ev.carbon_thunk(ptr %return), !dbg !37
-// CHECK:STDOUT:   ret void, !dbg !37
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #3 !dbg !38 {
+// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !38 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !44
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #5
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #4
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b"(ptr sret({}) %return) #3 !dbg !45 {
+// CHECK:STDOUT: define linkonce_odr void @"_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b"(ptr sret({}) %return) #0 !dbg !45 {
 // CHECK:STDOUT:   call void @"_COp:thunk.C.Cpp"(ptr %return), !dbg !47
 // CHECK:STDOUT:   ret void, !dbg !48
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z8TakeCRefR1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1)) #5
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z9TakeCRRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1)) #5
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z13TakeConstCRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1)) #5
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z10TakeIntRefRi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4)) #5
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z11TakeIntRRefOi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4)) #5
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z15TakeConstIntRefRKi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4)) #5
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @"_COp.7e389eab4a7e5487:core.Destroy.Core", { 2, 1, 0 }
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 4, 3, 2, 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #3 = { nounwind }
-// CHECK:STDOUT: attributes #4 = { alwaysinline nounwind }
-// CHECK:STDOUT: attributes #5 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { alwaysinline nounwind }
+// CHECK:STDOUT: attributes #3 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #5 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -486,33 +486,33 @@ fn GetRefs() {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1C", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{}
-// CHECK:STDOUT: !15 = !{!16, !16, i64 0}
-// CHECK:STDOUT: !16 = !{!"p1 int", !13, i64 0}
-// CHECK:STDOUT: !17 = !{i64 4}
-// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "PassRefs", linkageName: "_CPassRefs.Main", scope: null, file: !6, line: 17, type: !19, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !19 = !DISubroutineType(types: !20)
-// CHECK:STDOUT: !20 = !{null}
-// CHECK:STDOUT: !21 = !DILocation(line: 18, column: 3, scope: !18)
-// CHECK:STDOUT: !22 = !DILocation(line: 20, column: 17, scope: !18)
-// CHECK:STDOUT: !23 = !DILocation(line: 23, column: 3, scope: !18)
-// CHECK:STDOUT: !24 = !DILocation(line: 25, column: 19, scope: !18)
-// CHECK:STDOUT: !25 = !DILocation(line: 26, column: 23, scope: !18)
-// CHECK:STDOUT: !26 = !DILocation(line: 19, column: 3, scope: !18)
-// CHECK:STDOUT: !27 = !DILocation(line: 20, column: 3, scope: !18)
-// CHECK:STDOUT: !28 = !DILocation(line: 21, column: 3, scope: !18)
-// CHECK:STDOUT: !29 = !DILocation(line: 24, column: 3, scope: !18)
-// CHECK:STDOUT: !30 = !DILocation(line: 25, column: 3, scope: !18)
-// CHECK:STDOUT: !31 = !DILocation(line: 26, column: 3, scope: !18)
-// CHECK:STDOUT: !32 = !DILocation(line: 17, column: 1, scope: !18)
-// CHECK:STDOUT: !33 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk.C.Cpp", scope: null, file: !6, line: 5, type: !34, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !34 = !DISubroutineType(types: !35)
-// CHECK:STDOUT: !35 = !{!36}
-// CHECK:STDOUT: !36 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !37 = !DILocation(line: 5, column: 7, scope: !33)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "PassRefs", linkageName: "_CPassRefs.Main", scope: null, file: !6, line: 17, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 18, column: 3, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 20, column: 17, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 23, column: 3, scope: !11)
+// CHECK:STDOUT: !17 = !DILocation(line: 25, column: 19, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 26, column: 23, scope: !11)
+// CHECK:STDOUT: !19 = !DILocation(line: 19, column: 3, scope: !11)
+// CHECK:STDOUT: !20 = !DILocation(line: 20, column: 3, scope: !11)
+// CHECK:STDOUT: !21 = !DILocation(line: 21, column: 3, scope: !11)
+// CHECK:STDOUT: !22 = !DILocation(line: 24, column: 3, scope: !11)
+// CHECK:STDOUT: !23 = !DILocation(line: 25, column: 3, scope: !11)
+// CHECK:STDOUT: !24 = !DILocation(line: 26, column: 3, scope: !11)
+// CHECK:STDOUT: !25 = !DILocation(line: 17, column: 1, scope: !11)
+// CHECK:STDOUT: !26 = !{!27, !27, i64 0}
+// CHECK:STDOUT: !27 = !{!"p1 _ZTS1C", !28, i64 0}
+// CHECK:STDOUT: !28 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !29 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk.C.Cpp", scope: null, file: !6, line: 5, type: !30, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !30 = !DISubroutineType(types: !31)
+// CHECK:STDOUT: !31 = !{!32}
+// CHECK:STDOUT: !32 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !33 = !DILocation(line: 5, column: 7, scope: !29)
+// CHECK:STDOUT: !34 = !{}
+// CHECK:STDOUT: !35 = !{!36, !36, i64 0}
+// CHECK:STDOUT: !36 = !{!"p1 int", !28, i64 0}
+// CHECK:STDOUT: !37 = !{i64 4}
 // CHECK:STDOUT: !38 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !6, line: 26, type: !39, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !42)
 // CHECK:STDOUT: !39 = !DISubroutineType(types: !40)
 // CHECK:STDOUT: !40 = !{null, !41}
@@ -520,7 +520,7 @@ fn GetRefs() {
 // CHECK:STDOUT: !42 = !{!43}
 // CHECK:STDOUT: !43 = !DILocalVariable(arg: 1, scope: !38, type: !41)
 // CHECK:STDOUT: !44 = !DILocation(line: 26, column: 23, scope: !38)
-// CHECK:STDOUT: !45 = distinct !DISubprogram(name: "Op", linkageName: "_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b", scope: null, file: !46, line: 9, type: !34, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !45 = distinct !DISubprogram(name: "Op", linkageName: "_COp.9b0a46309e124f8a:DefaultOrUnformed.Core.93349b0fe912a29b", scope: null, file: !46, line: 9, type: !30, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !46 = !DIFile(filename: "min_prelude/parts/default.carbon", directory: "")
 // CHECK:STDOUT: !47 = !DILocation(line: 9, column: 28, scope: !45)
 // CHECK:STDOUT: !48 = !DILocation(line: 9, column: 21, scope: !45)
@@ -588,81 +588,81 @@ fn GetRefs() {
 // CHECK:STDOUT:
 // CHECK:STDOUT: %class.ForceThunk = type { i8 }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CGetRefs.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %ReturnCRef__carbon_thunk.call = call ptr @_Z10ReturnCRef10ForceThunk.carbon_thunk0(), !dbg !14
+// CHECK:STDOUT:   %ReturnCRRef__carbon_thunk.call = call ptr @_Z11ReturnCRRef10ForceThunk.carbon_thunk0(), !dbg !15
+// CHECK:STDOUT:   %ReturnConstCRef__carbon_thunk.call = call ptr @_Z15ReturnConstCRef10ForceThunk.carbon_thunk0(), !dbg !16
+// CHECK:STDOUT:   %ReturnIntRef__carbon_thunk.call = call ptr @_Z12ReturnIntRef10ForceThunk.carbon_thunk0(), !dbg !17
+// CHECK:STDOUT:   %ReturnIntRRef__carbon_thunk.call = call ptr @_Z13ReturnIntRRef10ForceThunk.carbon_thunk0(), !dbg !18
+// CHECK:STDOUT:   %ReturnConstIntRef__carbon_thunk.call = call ptr @_Z17ReturnConstIntRef10ForceThunk.carbon_thunk0(), !dbg !19
+// CHECK:STDOUT:   ret void, !dbg !20
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef nonnull align 1 dereferenceable(1) ptr @_Z10ReturnCRef10ForceThunk.carbon_thunk0() #0 {
+// CHECK:STDOUT: define internal noundef nonnull align 1 dereferenceable(1) ptr @_Z10ReturnCRef10ForceThunk.carbon_thunk0() #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
 // CHECK:STDOUT:   %call = call noundef nonnull align 1 dereferenceable(1) ptr @_Z10ReturnCRef10ForceThunk()
 // CHECK:STDOUT:   ret ptr %call
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z10ReturnCRef10ForceThunk() #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef nonnull align 1 dereferenceable(1) ptr @_Z11ReturnCRRef10ForceThunk.carbon_thunk0() #0 {
+// CHECK:STDOUT: define internal noundef nonnull align 1 dereferenceable(1) ptr @_Z11ReturnCRRef10ForceThunk.carbon_thunk0() #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
 // CHECK:STDOUT:   %call = call noundef nonnull align 1 dereferenceable(1) ptr @_Z11ReturnCRRef10ForceThunk()
 // CHECK:STDOUT:   ret ptr %call
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z11ReturnCRRef10ForceThunk() #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef nonnull align 1 dereferenceable(1) ptr @_Z15ReturnConstCRef10ForceThunk.carbon_thunk0() #0 {
+// CHECK:STDOUT: define internal noundef nonnull align 1 dereferenceable(1) ptr @_Z15ReturnConstCRef10ForceThunk.carbon_thunk0() #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
 // CHECK:STDOUT:   %call = call noundef nonnull align 1 dereferenceable(1) ptr @_Z15ReturnConstCRef10ForceThunk()
 // CHECK:STDOUT:   ret ptr %call
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z15ReturnConstCRef10ForceThunk() #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef nonnull align 4 dereferenceable(4) ptr @_Z12ReturnIntRef10ForceThunk.carbon_thunk0() #0 {
+// CHECK:STDOUT: define internal noundef nonnull align 4 dereferenceable(4) ptr @_Z12ReturnIntRef10ForceThunk.carbon_thunk0() #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
 // CHECK:STDOUT:   %call = call noundef nonnull align 4 dereferenceable(4) ptr @_Z12ReturnIntRef10ForceThunk()
 // CHECK:STDOUT:   ret ptr %call
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z12ReturnIntRef10ForceThunk() #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef nonnull align 4 dereferenceable(4) ptr @_Z13ReturnIntRRef10ForceThunk.carbon_thunk0() #0 {
+// CHECK:STDOUT: define internal noundef nonnull align 4 dereferenceable(4) ptr @_Z13ReturnIntRRef10ForceThunk.carbon_thunk0() #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
 // CHECK:STDOUT:   %call = call noundef nonnull align 4 dereferenceable(4) ptr @_Z13ReturnIntRRef10ForceThunk()
 // CHECK:STDOUT:   ret ptr %call
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z13ReturnIntRRef10ForceThunk() #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local noundef nonnull align 4 dereferenceable(4) ptr @_Z17ReturnConstIntRef10ForceThunk.carbon_thunk0() #0 {
+// CHECK:STDOUT: define internal noundef nonnull align 4 dereferenceable(4) ptr @_Z17ReturnConstIntRef10ForceThunk.carbon_thunk0() #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %agg.tmp = alloca %class.ForceThunk, align 1
 // CHECK:STDOUT:   %call = call noundef nonnull align 4 dereferenceable(4) ptr @_Z17ReturnConstIntRef10ForceThunk()
 // CHECK:STDOUT:   ret ptr %call
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z17ReturnConstIntRef10ForceThunk() #1
+// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z10ReturnCRef10ForceThunk() #2
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CGetRefs.Main() #2 !dbg !11 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %ReturnCRef__carbon_thunk.call = call ptr @_Z10ReturnCRef10ForceThunk.carbon_thunk0(), !dbg !14
-// CHECK:STDOUT:   %ReturnCRRef__carbon_thunk.call = call ptr @_Z11ReturnCRRef10ForceThunk.carbon_thunk0(), !dbg !15
-// CHECK:STDOUT:   %ReturnConstCRef__carbon_thunk.call = call ptr @_Z15ReturnConstCRef10ForceThunk.carbon_thunk0(), !dbg !16
-// CHECK:STDOUT:   %ReturnIntRef__carbon_thunk.call = call ptr @_Z12ReturnIntRef10ForceThunk.carbon_thunk0(), !dbg !17
-// CHECK:STDOUT:   %ReturnIntRRef__carbon_thunk.call = call ptr @_Z13ReturnIntRRef10ForceThunk.carbon_thunk0(), !dbg !18
-// CHECK:STDOUT:   %ReturnConstIntRef__carbon_thunk.call = call ptr @_Z17ReturnConstIntRef10ForceThunk.carbon_thunk0(), !dbg !19
-// CHECK:STDOUT:   ret void, !dbg !20
-// CHECK:STDOUT: }
+// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z11ReturnCRRef10ForceThunk() #2
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z15ReturnConstCRef10ForceThunk() #2
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z12ReturnIntRef10ForceThunk() #2
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z13ReturnIntRRef10ForceThunk() #2
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z17ReturnConstIntRef10ForceThunk() #2
+// CHECK:STDOUT:
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}

toolchain/lower/testdata/interop/cpp/return.carbon

@@ -117,98 +117,68 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
 // CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z8ReturnU8v.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define i8 @_CGetU8.Main() #0 !dbg !11 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %call = call noundef zeroext i8 @_Z8ReturnU8v()
-// CHECK:STDOUT:   store i8 %call, ptr %0, align 1, !tbaa !14
-// CHECK:STDOUT:   ret void
+// CHECK:STDOUT:   %.loc6_40.1.temp = alloca i8, align 1, !dbg !15
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc6_40.1.temp), !dbg !15
+// CHECK:STDOUT:   call void @_Z8ReturnU8v.carbon_thunk(ptr %.loc6_40.1.temp), !dbg !15
+// CHECK:STDOUT:   %0 = load i8, ptr %.loc6_40.1.temp, align 1, !dbg !16
+// CHECK:STDOUT:   ret i8 %0, !dbg !16
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef zeroext i8 @_Z8ReturnU8v() #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z9ReturnU16v.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_Z8ReturnU8v.carbon_thunk(ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !15
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !15
-// CHECK:STDOUT:   %call = call noundef zeroext i16 @_Z9ReturnU16v()
-// CHECK:STDOUT:   store i16 %call, ptr %0, align 2, !tbaa !17
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !17
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !17
+// CHECK:STDOUT:   %call = call noundef zeroext i8 @_Z8ReturnU8v()
+// CHECK:STDOUT:   store i8 %call, ptr %0, align 1, !tbaa !20
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef zeroext i16 @_Z9ReturnU16v() #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z8ReturnI8v.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define i16 @_CGetU16.Main() #0 !dbg !21 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %call = call noundef signext i8 @_Z8ReturnI8v()
-// CHECK:STDOUT:   store i8 %call, ptr %0, align 1, !tbaa !14
-// CHECK:STDOUT:   ret void
+// CHECK:STDOUT:   %.loc7_43.1.temp = alloca i16, align 2, !dbg !25
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_43.1.temp), !dbg !25
+// CHECK:STDOUT:   call void @_Z9ReturnU16v.carbon_thunk(ptr %.loc7_43.1.temp), !dbg !25
+// CHECK:STDOUT:   %0 = load i16, ptr %.loc7_43.1.temp, align 2, !dbg !26
+// CHECK:STDOUT:   ret i16 %0, !dbg !26
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef signext i8 @_Z8ReturnI8v() #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z9ReturnI16v.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_Z9ReturnU16v.carbon_thunk(ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !15
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !15
-// CHECK:STDOUT:   %call = call noundef signext i16 @_Z9ReturnI16v()
-// CHECK:STDOUT:   store i16 %call, ptr %0, align 2, !tbaa !17
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !27
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !27
+// CHECK:STDOUT:   %call = call noundef zeroext i16 @_Z9ReturnU16v()
+// CHECK:STDOUT:   store i16 %call, ptr %0, align 2, !tbaa !29
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef signext i16 @_Z9ReturnI16v() #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i8 @_CGetU8.Main() #2 !dbg !19 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc6_40.1.temp = alloca i8, align 1, !dbg !23
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc6_40.1.temp), !dbg !23
-// CHECK:STDOUT:   call void @_Z8ReturnU8v.carbon_thunk(ptr %.loc6_40.1.temp), !dbg !23
-// CHECK:STDOUT:   %0 = load i8, ptr %.loc6_40.1.temp, align 1, !dbg !24
-// CHECK:STDOUT:   ret i8 %0, !dbg !24
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i16 @_CGetU16.Main() #2 !dbg !25 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc7_43.1.temp = alloca i16, align 2, !dbg !29
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_43.1.temp), !dbg !29
-// CHECK:STDOUT:   call void @_Z9ReturnU16v.carbon_thunk(ptr %.loc7_43.1.temp), !dbg !29
-// CHECK:STDOUT:   %0 = load i16, ptr %.loc7_43.1.temp, align 2, !dbg !30
-// CHECK:STDOUT:   ret i16 %0, !dbg !30
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CGetU32.Main() #2 !dbg !31 {
+// CHECK:STDOUT: define i32 @_CGetU32.Main() #0 !dbg !31 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %ReturnU32.call = call i32 @_Z9ReturnU32v(), !dbg !35
 // CHECK:STDOUT:   ret i32 %ReturnU32.call, !dbg !36
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef i32 @_Z9ReturnU32v() #1
+// CHECK:STDOUT: declare noundef i32 @_Z9ReturnU32v() #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i64 @_CGetU64.Main() #2 !dbg !37 {
+// CHECK:STDOUT: define i64 @_CGetU64.Main() #0 !dbg !37 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %ReturnU64.call = call i64 @_Z9ReturnU64v(), !dbg !41
 // CHECK:STDOUT:   ret i64 %ReturnU64.call, !dbg !42
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef i64 @_Z9ReturnU64v() #1
+// CHECK:STDOUT: declare noundef i64 @_Z9ReturnU64v() #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i8 @_CGetI8.Main() #2 !dbg !43 {
+// CHECK:STDOUT: define i8 @_CGetI8.Main() #0 !dbg !43 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.loc11_40.1.temp = alloca i8, align 1, !dbg !47
 // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc11_40.1.temp), !dbg !47
@@ -217,8 +187,19 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT:   ret i8 %0, !dbg !48
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
+// CHECK:STDOUT: define internal void @_Z8ReturnI8v.carbon_thunk(ptr noundef %return) #1 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !17
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !17
+// CHECK:STDOUT:   %call = call noundef signext i8 @_Z8ReturnI8v()
+// CHECK:STDOUT:   store i8 %call, ptr %0, align 1, !tbaa !20
+// CHECK:STDOUT:   ret void
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i16 @_CGetI16.Main() #2 !dbg !49 {
+// CHECK:STDOUT: define i16 @_CGetI16.Main() #0 !dbg !49 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.loc12_43.1.temp = alloca i16, align 2, !dbg !53
 // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc12_43.1.temp), !dbg !53
@@ -227,28 +208,39 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT:   ret i16 %0, !dbg !54
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
+// CHECK:STDOUT: define internal void @_Z9ReturnI16v.carbon_thunk(ptr noundef %return) #1 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !27
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !27
+// CHECK:STDOUT:   %call = call noundef signext i16 @_Z9ReturnI16v()
+// CHECK:STDOUT:   store i16 %call, ptr %0, align 2, !tbaa !29
+// CHECK:STDOUT:   ret void
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CGetI32.Main() #2 !dbg !55 {
+// CHECK:STDOUT: define i32 @_CGetI32.Main() #0 !dbg !55 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %ReturnI32.call = call i32 @_Z9ReturnI32v(), !dbg !59
 // CHECK:STDOUT:   ret i32 %ReturnI32.call, !dbg !60
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef i32 @_Z9ReturnI32v() #1
+// CHECK:STDOUT: declare noundef i32 @_Z9ReturnI32v() #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i64 @_CGetI64.Main() #2 !dbg !61 {
+// CHECK:STDOUT: define i64 @_CGetI64.Main() #0 !dbg !61 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %ReturnI64.call = call i64 @_Z9ReturnI64v(), !dbg !65
 // CHECK:STDOUT:   ret i64 %ReturnI64.call, !dbg !66
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare noundef i64 @_Z9ReturnI64v() #1
+// CHECK:STDOUT: declare noundef i64 @_Z9ReturnI64v() #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_CUse.Main(i8, i16, i32, i64, i8, i16, i32, i64)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CLets.Main() #2 !dbg !67 {
+// CHECK:STDOUT: define void @_CLets.Main() #0 !dbg !67 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.loc19_32.1.temp = alloca i8, align 1, !dbg !70
 // CHECK:STDOUT:   %.loc20_35.1.temp = alloca i16, align 2, !dbg !71
@@ -279,31 +271,31 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.406738f1b62008ed:core.Destroy.Core"(ptr %self) #2 !dbg !80 {
+// CHECK:STDOUT: define weak_odr void @"_COp.406738f1b62008ed:core.Destroy.Core"(ptr %self) #0 !dbg !80 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !85
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.43bece552030817c:core.Destroy.Core"(ptr %self) #2 !dbg !86 {
+// CHECK:STDOUT: define weak_odr void @"_COp.43bece552030817c:core.Destroy.Core"(ptr %self) #0 !dbg !86 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !91
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.ecaf8c3e76291eee:core.Destroy.Core"(ptr %self) #2 !dbg !92 {
+// CHECK:STDOUT: define weak_odr void @"_COp.ecaf8c3e76291eee:core.Destroy.Core"(ptr %self) #0 !dbg !92 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !97
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.3de38e83520d6bec:core.Destroy.Core"(ptr %self) #2 !dbg !98 {
+// CHECK:STDOUT: define weak_odr void @"_COp.3de38e83520d6bec:core.Destroy.Core"(ptr %self) #0 !dbg !98 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !103
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CVars.Main() #2 !dbg !104 {
+// CHECK:STDOUT: define void @_CVars.Main() #0 !dbg !104 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %my_u8.var = alloca i8, align 1, !dbg !105
 // CHECK:STDOUT:   %my_u16.var = alloca i16, align 2, !dbg !106
@@ -354,25 +346,25 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.0d6779e60704359e:core.Destroy.Core"(ptr %self) #2 !dbg !131 {
+// CHECK:STDOUT: define weak_odr void @"_COp.0d6779e60704359e:core.Destroy.Core"(ptr %self) #0 !dbg !131 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !136
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #2 !dbg !137 {
+// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !137 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !142
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.798ffd80cf2992c3:core.Destroy.Core"(ptr %self) #2 !dbg !143 {
+// CHECK:STDOUT: define weak_odr void @"_COp.798ffd80cf2992c3:core.Destroy.Core"(ptr %self) #0 !dbg !143 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !148
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.dab1523ded6661cc:core.Destroy.Core"(ptr %self) #2 !dbg !149 {
+// CHECK:STDOUT: define weak_odr void @"_COp.dab1523ded6661cc:core.Destroy.Core"(ptr %self) #0 !dbg !149 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   ret void, !dbg !154
 // CHECK:STDOUT: }
@@ -380,12 +372,20 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
 // CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare noundef zeroext i8 @_Z8ReturnU8v() #2
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare noundef zeroext i16 @_Z9ReturnU16v() #2
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare noundef signext i8 @_Z8ReturnI8v() #2
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare noundef signext i16 @_Z9ReturnI16v() #2
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
@@ -403,26 +403,26 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 omnipotent char", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{!9, !9, i64 0}
-// CHECK:STDOUT: !15 = !{!16, !16, i64 0}
-// CHECK:STDOUT: !16 = !{!"p1 short", !13, i64 0}
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "GetU8", linkageName: "_CGetU8.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{!14}
+// CHECK:STDOUT: !14 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_unsigned)
+// CHECK:STDOUT: !15 = !DILocation(line: 6, column: 27, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 20, scope: !11)
 // CHECK:STDOUT: !17 = !{!18, !18, i64 0}
-// CHECK:STDOUT: !18 = !{!"short", !9, i64 0}
-// CHECK:STDOUT: !19 = distinct !DISubprogram(name: "GetU8", linkageName: "_CGetU8.Main", scope: null, file: !6, line: 6, type: !20, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !20 = !DISubroutineType(types: !21)
-// CHECK:STDOUT: !21 = !{!22}
-// CHECK:STDOUT: !22 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_unsigned)
-// CHECK:STDOUT: !23 = !DILocation(line: 6, column: 27, scope: !19)
-// CHECK:STDOUT: !24 = !DILocation(line: 6, column: 20, scope: !19)
-// CHECK:STDOUT: !25 = distinct !DISubprogram(name: "GetU16", linkageName: "_CGetU16.Main", scope: null, file: !6, line: 7, type: !26, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !26 = !DISubroutineType(types: !27)
-// CHECK:STDOUT: !27 = !{!28}
-// CHECK:STDOUT: !28 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_unsigned)
-// CHECK:STDOUT: !29 = !DILocation(line: 7, column: 29, scope: !25)
-// CHECK:STDOUT: !30 = !DILocation(line: 7, column: 22, scope: !25)
+// CHECK:STDOUT: !18 = !{!"p1 omnipotent char", !19, i64 0}
+// CHECK:STDOUT: !19 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !20 = !{!9, !9, i64 0}
+// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "GetU16", linkageName: "_CGetU16.Main", scope: null, file: !6, line: 7, type: !22, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !22 = !DISubroutineType(types: !23)
+// CHECK:STDOUT: !23 = !{!24}
+// CHECK:STDOUT: !24 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_unsigned)
+// CHECK:STDOUT: !25 = !DILocation(line: 7, column: 29, scope: !21)
+// CHECK:STDOUT: !26 = !DILocation(line: 7, column: 22, scope: !21)
+// CHECK:STDOUT: !27 = !{!28, !28, i64 0}
+// CHECK:STDOUT: !28 = !{!"p1 short", !19, i64 0}
+// CHECK:STDOUT: !29 = !{!30, !30, i64 0}
+// CHECK:STDOUT: !30 = !{!"short", !9, i64 0}
 // CHECK:STDOUT: !31 = distinct !DISubprogram(name: "GetU32", linkageName: "_CGetU32.Main", scope: null, file: !6, line: 8, type: !32, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !32 = !DISubroutineType(types: !33)
 // CHECK:STDOUT: !33 = !{!34}
@@ -486,15 +486,15 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: !91 = !DILocation(line: 24, column: 19, scope: !86)
 // CHECK:STDOUT: !92 = distinct !DISubprogram(name: "Op", linkageName: "_COp.ecaf8c3e76291eee:core.Destroy.Core", scope: null, file: !6, line: 20, type: !93, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !95)
 // CHECK:STDOUT: !93 = !DISubroutineType(types: !94)
-// CHECK:STDOUT: !94 = !{null, !28}
+// CHECK:STDOUT: !94 = !{null, !24}
 // CHECK:STDOUT: !95 = !{!96}
-// CHECK:STDOUT: !96 = !DILocalVariable(arg: 1, scope: !92, type: !28)
+// CHECK:STDOUT: !96 = !DILocalVariable(arg: 1, scope: !92, type: !24)
 // CHECK:STDOUT: !97 = !DILocation(line: 20, column: 21, scope: !92)
 // CHECK:STDOUT: !98 = distinct !DISubprogram(name: "Op", linkageName: "_COp.3de38e83520d6bec:core.Destroy.Core", scope: null, file: !6, line: 19, type: !99, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !101)
 // CHECK:STDOUT: !99 = !DISubroutineType(types: !100)
-// CHECK:STDOUT: !100 = !{null, !22}
+// CHECK:STDOUT: !100 = !{null, !14}
 // CHECK:STDOUT: !101 = !{!102}
-// CHECK:STDOUT: !102 = !DILocalVariable(arg: 1, scope: !98, type: !22)
+// CHECK:STDOUT: !102 = !DILocalVariable(arg: 1, scope: !98, type: !14)
 // CHECK:STDOUT: !103 = !DILocation(line: 19, column: 19, scope: !98)
 // CHECK:STDOUT: !104 = distinct !DISubprogram(name: "Vars", linkageName: "_CVars.Main", scope: null, file: !6, line: 32, type: !68, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !105 = !DILocation(line: 33, column: 3, scope: !104)
@@ -554,27 +554,25 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT:
 // CHECK:STDOUT: %struct.X = type { ptr, ptr }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CGetX.Main(ptr sret([16 x i8]) %return) #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   call void @_Z4Makev.carbon_thunk(ptr %return), !dbg !15
+// CHECK:STDOUT:   ret void, !dbg !16
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z4Makev.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_Z4Makev.carbon_thunk(ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !17
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !17
 // CHECK:STDOUT:   call void @_Z4Makev(ptr dead_on_unwind writable sret(%struct.X) align 8 %0)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z4Makev(ptr dead_on_unwind writable sret(%struct.X) align 8) #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CGetX.Main(ptr sret([16 x i8]) %return) #2 !dbg !14 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z4Makev.carbon_thunk(ptr %return), !dbg !18
-// CHECK:STDOUT:   ret void, !dbg !19
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CLet.Main() #2 !dbg !20 {
+// CHECK:STDOUT: define void @_CLet.Main() #0 !dbg !20 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.loc9_27.1.temp = alloca [16 x i8], align 1, !dbg !23
 // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_27.1.temp), !dbg !23
@@ -584,10 +582,10 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: declare void @_ZN1XD1Ev(ptr noundef nonnull align 8 dead_on_return(16) dereferenceable(16)) unnamed_addr #3
+// CHECK:STDOUT: declare void @_ZN1XD1Ev(ptr noundef nonnull align 8 dead_on_return(16) dereferenceable(16)) unnamed_addr #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CVar.Main() #2 !dbg !25 {
+// CHECK:STDOUT: define void @_CVar.Main() #0 !dbg !25 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %_.var = alloca [16 x i8], align 1, !dbg !26
 // CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !26
@@ -597,16 +595,18 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #4
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
+// CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_Z4Makev(ptr dead_on_unwind writable sret(%struct.X) align 8) #4
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
-// CHECK:STDOUT: attributes #3 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #4 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -623,15 +623,15 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1X", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = distinct !DISubprogram(name: "GetX", linkageName: "_CGetX.Main", scope: null, file: !6, line: 6, type: !15, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !15 = !DISubroutineType(types: !16)
-// CHECK:STDOUT: !16 = !{!17}
-// CHECK:STDOUT: !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !18 = !DILocation(line: 6, column: 29, scope: !14)
-// CHECK:STDOUT: !19 = !DILocation(line: 6, column: 22, scope: !14)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "GetX", linkageName: "_CGetX.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{!14}
+// CHECK:STDOUT: !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !15 = !DILocation(line: 6, column: 29, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 22, scope: !11)
+// CHECK:STDOUT: !17 = !{!18, !18, i64 0}
+// CHECK:STDOUT: !18 = !{!"p1 _ZTS1X", !19, i64 0}
+// CHECK:STDOUT: !19 = !{!"any pointer", !9, i64 0}
 // CHECK:STDOUT: !20 = distinct !DISubprogram(name: "Let", linkageName: "_CLet.Main", scope: null, file: !6, line: 8, type: !21, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !21 = !DISubroutineType(types: !22)
 // CHECK:STDOUT: !22 = !{null}
@@ -649,33 +649,33 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: %class.D = type { i8 }
 // CHECK:STDOUT: %class.C = type { i8 }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CCall.Main(ptr sret({}) %return, ptr %x) #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   call void @_Z1f1D.carbon_thunk(ptr %x, ptr %return), !dbg !17
+// CHECK:STDOUT:   ret void, !dbg !18
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z1f1D.carbon_thunk(ptr noundef %0, ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_Z1f1D.carbon_thunk(ptr noundef %0, ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %class.D, align 1
 // CHECK:STDOUT:   %undef.agg.tmp = alloca %class.C, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %1 = load ptr, ptr %return.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %2 = load ptr, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !19
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !22
+// CHECK:STDOUT:   %1 = load ptr, ptr %return.addr, align 8, !tbaa !22
+// CHECK:STDOUT:   %2 = load ptr, ptr %.addr, align 8, !tbaa !19
 // CHECK:STDOUT:   call void @_Z1f1D()
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z1f1D() #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CCall.Main(ptr sret({}) %return, ptr %x) #2 !dbg !16 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z1f1D.carbon_thunk(ptr %x, ptr %return), !dbg !22
-// CHECK:STDOUT:   ret void, !dbg !23
-// CHECK:STDOUT: }
+// CHECK:STDOUT: declare void @_Z1f1D() #2
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -692,16 +692,16 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1D", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{!15, !15, i64 0}
-// CHECK:STDOUT: !15 = !{!"p1 _ZTS1C", !13, i64 0}
-// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !6, line: 10, type: !17, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !20)
-// CHECK:STDOUT: !17 = !DISubroutineType(types: !18)
-// CHECK:STDOUT: !18 = !{!19, !19}
-// CHECK:STDOUT: !19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !20 = !{!21}
-// CHECK:STDOUT: !21 = !DILocalVariable(arg: 1, scope: !16, type: !19)
-// CHECK:STDOUT: !22 = !DILocation(line: 11, column: 10, scope: !16)
-// CHECK:STDOUT: !23 = !DILocation(line: 11, column: 3, scope: !16)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !6, line: 10, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !15)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{!14, !14}
+// CHECK:STDOUT: !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !15 = !{!16}
+// CHECK:STDOUT: !16 = !DILocalVariable(arg: 1, scope: !11, type: !14)
+// CHECK:STDOUT: !17 = !DILocation(line: 11, column: 10, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 11, column: 3, scope: !11)
+// CHECK:STDOUT: !19 = !{!20, !20, i64 0}
+// CHECK:STDOUT: !20 = !{!"p1 _ZTS1D", !21, i64 0}
+// CHECK:STDOUT: !21 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !22 = !{!23, !23, i64 0}
+// CHECK:STDOUT: !23 = !{!"p1 _ZTS1C", !21, i64 0}

toolchain/lower/testdata/interop/cpp/std_initializer_list.carbon

@@ -118,28 +118,84 @@ fn InitNontrivialDtor() {
 // CHECK:STDOUT:
 // CHECK:STDOUT: %"class.std::initializer_list" = type { ptr, ptr }
 // CHECK:STDOUT:
-// CHECK:STDOUT: $_ZN11vector_likeC2ESt16initializer_listIiE = comdat any
-// CHECK:STDOUT:
-// CHECK:STDOUT: $_ZN15nontrivial_dtorC2Ev = comdat any
-// CHECK:STDOUT:
 // CHECK:STDOUT: $_ZN11vector_likeD2Ev = comdat any
 // CHECK:STDOUT:
 // CHECK:STDOUT: $_ZN15nontrivial_dtorD2Ev = comdat any
 // CHECK:STDOUT:
+// CHECK:STDOUT: $_ZN11vector_likeC2ESt16initializer_listIiE = comdat any
+// CHECK:STDOUT:
+// CHECK:STDOUT: $_ZN15nontrivial_dtorC2Ev = comdat any
+// CHECK:STDOUT:
 // CHECK:STDOUT: @array = internal constant [3 x i32] [i32 1, i32 2, i32 3]
 // CHECK:STDOUT: @array.loc13_50.15 = internal constant [3 x i32] [i32 1, i32 2, i32 3]
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_CWithinLifetime.Main()
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CInitDirectly.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 1, !dbg !14
+// CHECK:STDOUT:   %.loc13_50.3.temp = alloca [3 x i32], align 4, !dbg !15
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !14
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc13_50.3.temp), !dbg !15
+// CHECK:STDOUT:   %.loc13_50.4.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 0, !dbg !15
+// CHECK:STDOUT:   %.loc13_50.7.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 1, !dbg !15
+// CHECK:STDOUT:   %.loc13_50.10.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 2, !dbg !15
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 0, !dbg !14
+// CHECK:STDOUT:   store ptr @array.loc13_50.15, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !14
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.end = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 8, !dbg !14
+// CHECK:STDOUT:   store ptr getelementptr inbounds ([3 x i32], ptr @array.loc13_50.15, i32 1), ptr %initializer_list.initializer_list.call.init_list.end, align 8, !dbg !14
+// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !16
+// CHECK:STDOUT:   call void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr @array), !dbg !15
+// CHECK:STDOUT:   ret void, !dbg !17
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !18 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   ret void, !dbg !24
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define weak_odr void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr %self) #0 !dbg !25 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   ret void, !dbg !31
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CInitVectorLike.Main() #0 !dbg !32 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %_.var = alloca [1 x i8], align 1, !dbg !33
+// CHECK:STDOUT:   %.loc18_36.2.temp = alloca [16 x i8], align 1, !dbg !34
+// CHECK:STDOUT:   %.loc18_36.4.temp = alloca [3 x i32], align 4, !dbg !34
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !33
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_36.2.temp), !dbg !34
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_36.4.temp), !dbg !34
+// CHECK:STDOUT:   %.loc18_36.5.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 0, !dbg !34
+// CHECK:STDOUT:   %.loc18_36.8.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 1, !dbg !34
+// CHECK:STDOUT:   %.loc18_36.11.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 2, !dbg !34
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %.loc18_36.2.temp, i32 0, i32 0, !dbg !34
+// CHECK:STDOUT:   store ptr @array.loc13_50.15, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !34
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.end = getelementptr inbounds nuw [16 x i8], ptr %.loc18_36.2.temp, i32 0, i32 8, !dbg !34
+// CHECK:STDOUT:   store ptr getelementptr inbounds ([3 x i32], ptr @array.loc13_50.15, i32 1), ptr %initializer_list.initializer_list.call.init_list.end, align 8, !dbg !34
+// CHECK:STDOUT:   call void @_ZN11vector_likeC1ESt16initializer_listIiE.carbon_thunk(ptr %.loc18_36.2.temp, ptr %_.var), !dbg !33
+// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !35
+// CHECK:STDOUT:   call void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr @array), !dbg !34
+// CHECK:STDOUT:   call void @_ZN11vector_likeD2Ev(ptr %_.var), !dbg !33
+// CHECK:STDOUT:   ret void, !dbg !36
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_ZN11vector_likeC1ESt16initializer_listIiE.carbon_thunk(ptr noundef %list, ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_ZN11vector_likeC1ESt16initializer_listIiE.carbon_thunk(ptr noundef %list, ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %list.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %"class.std::initializer_list", align 8
-// CHECK:STDOUT:   store ptr %list, ptr %list.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %1 = load ptr, ptr %list.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 8 %agg.tmp, ptr align 8 %1, i64 16, i1 false), !tbaa.struct !16
+// CHECK:STDOUT:   store ptr %list, ptr %list.addr, align 8, !tbaa !37
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !40
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !40
+// CHECK:STDOUT:   %1 = load ptr, ptr %list.addr, align 8, !tbaa !37
+// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 8 %agg.tmp, ptr align 8 %1, i64 16, i1 false), !tbaa.struct !42
 // CHECK:STDOUT:   %2 = getelementptr inbounds nuw { ptr, ptr }, ptr %agg.tmp, i32 0, i32 0
 // CHECK:STDOUT:   %3 = load ptr, ptr %2, align 8
 // CHECK:STDOUT:   %4 = getelementptr inbounds nuw { ptr, ptr }, ptr %agg.tmp, i32 0, i32 1
@@ -148,156 +204,101 @@ fn InitNontrivialDtor() {
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN11vector_likeC2ESt16initializer_listIiE(ptr noundef nonnull align 1 dereferenceable(1) %this, ptr %list.coerce0, ptr %list.coerce1) unnamed_addr #2 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN11vector_likeD2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %list = alloca %"class.std::initializer_list", align 8
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   %0 = getelementptr inbounds nuw { ptr, ptr }, ptr %list, i32 0, i32 0
-// CHECK:STDOUT:   store ptr %list.coerce0, ptr %0, align 8
-// CHECK:STDOUT:   %1 = getelementptr inbounds nuw { ptr, ptr }, ptr %list, i32 0, i32 1
-// CHECK:STDOUT:   store ptr %list.coerce1, ptr %1, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !14
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !40
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CInitNontrivialDtor.Main() #0 !dbg !45 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 1, !dbg !46
+// CHECK:STDOUT:   %.loc23_69.17.temp = alloca [3 x [1 x i8]], align 1, !dbg !47
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !46
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc23_69.17.temp), !dbg !47
+// CHECK:STDOUT:   %.loc23_69.18.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 0, !dbg !47
+// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.18.array.index), !dbg !47
+// CHECK:STDOUT:   %.loc23_69.16.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 1, !dbg !47
+// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.16.array.index), !dbg !47
+// CHECK:STDOUT:   %.loc23_69.15.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 2, !dbg !47
+// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.15.array.index), !dbg !47
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 0, !dbg !46
+// CHECK:STDOUT:   store ptr %.loc23_69.17.temp, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !46
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.end = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 8, !dbg !46
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.array.end = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 1, !dbg !46
+// CHECK:STDOUT:   store ptr %initializer_list.initializer_list.call.array.end, ptr %initializer_list.initializer_list.call.init_list.end, align 8, !dbg !46
+// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !48
+// CHECK:STDOUT:   call void @"_COp.3c5ceecfa63e1bfb:core.Destroy.Core"(ptr %.loc23_69.17.temp), !dbg !47
+// CHECK:STDOUT:   ret void, !dbg !49
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !19
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !19
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !50
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !50
 // CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %0)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN15nontrivial_dtorC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN15nontrivial_dtorD2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !19
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !50
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_CWithinLifetime.Main()
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CInitDirectly.Main() #3 !dbg !21 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 1, !dbg !24
-// CHECK:STDOUT:   %.loc13_50.3.temp = alloca [3 x i32], align 4, !dbg !25
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !24
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc13_50.3.temp), !dbg !25
-// CHECK:STDOUT:   %.loc13_50.4.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 0, !dbg !25
-// CHECK:STDOUT:   %.loc13_50.7.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 1, !dbg !25
-// CHECK:STDOUT:   %.loc13_50.10.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 2, !dbg !25
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 0, !dbg !24
-// CHECK:STDOUT:   store ptr @array.loc13_50.15, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !24
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.end = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 8, !dbg !24
-// CHECK:STDOUT:   store ptr getelementptr inbounds ([3 x i32], ptr @array.loc13_50.15, i32 1), ptr %initializer_list.initializer_list.call.init_list.end, align 8, !dbg !24
-// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !26
-// CHECK:STDOUT:   call void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr @array), !dbg !25
-// CHECK:STDOUT:   ret void, !dbg !27
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #3 !dbg !28 {
+// CHECK:STDOUT: define weak_odr void @"_COp.3c5ceecfa63e1bfb:core.Destroy.Core"(ptr %self) #0 !dbg !52 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !34
+// CHECK:STDOUT:   ret void, !dbg !55
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr %self) #3 !dbg !35 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !41
-// CHECK:STDOUT: }
+// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CInitVectorLike.Main() #3 !dbg !42 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %_.var = alloca [1 x i8], align 1, !dbg !43
-// CHECK:STDOUT:   %.loc18_36.2.temp = alloca [16 x i8], align 1, !dbg !44
-// CHECK:STDOUT:   %.loc18_36.4.temp = alloca [3 x i32], align 4, !dbg !44
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !43
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_36.2.temp), !dbg !44
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_36.4.temp), !dbg !44
-// CHECK:STDOUT:   %.loc18_36.5.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 0, !dbg !44
-// CHECK:STDOUT:   %.loc18_36.8.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 1, !dbg !44
-// CHECK:STDOUT:   %.loc18_36.11.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 2, !dbg !44
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %.loc18_36.2.temp, i32 0, i32 0, !dbg !44
-// CHECK:STDOUT:   store ptr @array.loc13_50.15, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !44
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.end = getelementptr inbounds nuw [16 x i8], ptr %.loc18_36.2.temp, i32 0, i32 8, !dbg !44
-// CHECK:STDOUT:   store ptr getelementptr inbounds ([3 x i32], ptr @array.loc13_50.15, i32 1), ptr %initializer_list.initializer_list.call.init_list.end, align 8, !dbg !44
-// CHECK:STDOUT:   call void @_ZN11vector_likeC1ESt16initializer_listIiE.carbon_thunk(ptr %.loc18_36.2.temp, ptr %_.var), !dbg !43
-// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !45
-// CHECK:STDOUT:   call void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr @array), !dbg !44
-// CHECK:STDOUT:   call void @_ZN11vector_likeD2Ev(ptr %_.var), !dbg !43
-// CHECK:STDOUT:   ret void, !dbg !46
-// CHECK:STDOUT: }
+// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
+// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #4
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN11vector_likeD2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN11vector_likeC2ESt16initializer_listIiE(ptr noundef nonnull align 1 dereferenceable(1) %this, ptr %list.coerce0, ptr %list.coerce1) unnamed_addr #2 comdat align 2 {
 // CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %list = alloca %"class.std::initializer_list", align 8
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !14
+// CHECK:STDOUT:   %0 = getelementptr inbounds nuw { ptr, ptr }, ptr %list, i32 0, i32 0
+// CHECK:STDOUT:   store ptr %list.coerce0, ptr %0, align 8
+// CHECK:STDOUT:   %1 = getelementptr inbounds nuw { ptr, ptr }, ptr %list, i32 0, i32 1
+// CHECK:STDOUT:   store ptr %list.coerce1, ptr %1, align 8
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !40
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CInitNontrivialDtor.Main() #3 !dbg !47 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 1, !dbg !48
-// CHECK:STDOUT:   %.loc23_69.17.temp = alloca [3 x [1 x i8]], align 1, !dbg !49
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !48
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc23_69.17.temp), !dbg !49
-// CHECK:STDOUT:   %.loc23_69.18.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 0, !dbg !49
-// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.18.array.index), !dbg !49
-// CHECK:STDOUT:   %.loc23_69.16.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 1, !dbg !49
-// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.16.array.index), !dbg !49
-// CHECK:STDOUT:   %.loc23_69.15.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 2, !dbg !49
-// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.15.array.index), !dbg !49
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 0, !dbg !48
-// CHECK:STDOUT:   store ptr %.loc23_69.17.temp, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !48
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.end = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 8, !dbg !48
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.array.end = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 1, !dbg !48
-// CHECK:STDOUT:   store ptr %initializer_list.initializer_list.call.array.end, ptr %initializer_list.initializer_list.call.init_list.end, align 8, !dbg !48
-// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !50
-// CHECK:STDOUT:   call void @"_COp.3c5ceecfa63e1bfb:core.Destroy.Core"(ptr %.loc23_69.17.temp), !dbg !49
-// CHECK:STDOUT:   ret void, !dbg !51
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN15nontrivial_dtorD2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN15nontrivial_dtorC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !19
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !50
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.3c5ceecfa63e1bfb:core.Destroy.Core"(ptr %self) #3 !dbg !52 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !55
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #4
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
+// CHECK:STDOUT: uselistorder ptr @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple, { 2, 1, 0 }
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 6, 5, 4, 3, 2, 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT: attributes #2 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #3 = { nounwind }
-// CHECK:STDOUT: attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #4 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -314,50 +315,50 @@ fn InitNontrivialDtor() {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTSSt16initializer_listIiE", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{!15, !15, i64 0}
-// CHECK:STDOUT: !15 = !{!"p1 _ZTS11vector_like", !13, i64 0}
-// CHECK:STDOUT: !16 = !{i64 0, i64 8, !17, i64 8, i64 8, !17}
-// CHECK:STDOUT: !17 = !{!18, !18, i64 0}
-// CHECK:STDOUT: !18 = !{!"p1 int", !13, i64 0}
-// CHECK:STDOUT: !19 = !{!20, !20, i64 0}
-// CHECK:STDOUT: !20 = !{!"p1 _ZTS15nontrivial_dtor", !13, i64 0}
-// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "InitDirectly", linkageName: "_CInitDirectly.Main", scope: null, file: !6, line: 12, type: !22, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !22 = !DISubroutineType(types: !23)
-// CHECK:STDOUT: !23 = !{null}
-// CHECK:STDOUT: !24 = !DILocation(line: 13, column: 3, scope: !21)
-// CHECK:STDOUT: !25 = !DILocation(line: 13, column: 42, scope: !21)
-// CHECK:STDOUT: !26 = !DILocation(line: 14, column: 3, scope: !21)
-// CHECK:STDOUT: !27 = !DILocation(line: 12, column: 1, scope: !21)
-// CHECK:STDOUT: !28 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !6, line: 13, type: !29, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !32)
-// CHECK:STDOUT: !29 = !DISubroutineType(types: !30)
-// CHECK:STDOUT: !30 = !{null, !31}
-// CHECK:STDOUT: !31 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !32 = !{!33}
-// CHECK:STDOUT: !33 = !DILocalVariable(arg: 1, scope: !28, type: !31)
-// CHECK:STDOUT: !34 = !DILocation(line: 13, column: 42, scope: !28)
-// CHECK:STDOUT: !35 = distinct !DISubprogram(name: "Op", linkageName: "_COp.bfd302cd235977c4:core.Destroy.Core", scope: null, file: !6, line: 13, type: !36, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !39)
-// CHECK:STDOUT: !36 = !DISubroutineType(types: !37)
-// CHECK:STDOUT: !37 = !{null, !38}
-// CHECK:STDOUT: !38 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !39 = !{!40}
-// CHECK:STDOUT: !40 = !DILocalVariable(arg: 1, scope: !35, type: !38)
-// CHECK:STDOUT: !41 = !DILocation(line: 13, column: 42, scope: !35)
-// CHECK:STDOUT: !42 = distinct !DISubprogram(name: "InitVectorLike", linkageName: "_CInitVectorLike.Main", scope: null, file: !6, line: 17, type: !22, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !43 = !DILocation(line: 18, column: 3, scope: !42)
-// CHECK:STDOUT: !44 = !DILocation(line: 18, column: 28, scope: !42)
-// CHECK:STDOUT: !45 = !DILocation(line: 19, column: 3, scope: !42)
-// CHECK:STDOUT: !46 = !DILocation(line: 17, column: 1, scope: !42)
-// CHECK:STDOUT: !47 = distinct !DISubprogram(name: "InitNontrivialDtor", linkageName: "_CInitNontrivialDtor.Main", scope: null, file: !6, line: 22, type: !22, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !48 = !DILocation(line: 23, column: 3, scope: !47)
-// CHECK:STDOUT: !49 = !DILocation(line: 23, column: 58, scope: !47)
-// CHECK:STDOUT: !50 = !DILocation(line: 24, column: 3, scope: !47)
-// CHECK:STDOUT: !51 = !DILocation(line: 22, column: 1, scope: !47)
-// CHECK:STDOUT: !52 = distinct !DISubprogram(name: "Op", linkageName: "_COp.3c5ceecfa63e1bfb:core.Destroy.Core", scope: null, file: !6, line: 23, type: !36, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !53)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "InitDirectly", linkageName: "_CInitDirectly.Main", scope: null, file: !6, line: 12, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 13, column: 3, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 13, column: 42, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 14, column: 3, scope: !11)
+// CHECK:STDOUT: !17 = !DILocation(line: 12, column: 1, scope: !11)
+// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !6, line: 13, type: !19, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !22)
+// CHECK:STDOUT: !19 = !DISubroutineType(types: !20)
+// CHECK:STDOUT: !20 = !{null, !21}
+// CHECK:STDOUT: !21 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !22 = !{!23}
+// CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !18, type: !21)
+// CHECK:STDOUT: !24 = !DILocation(line: 13, column: 42, scope: !18)
+// CHECK:STDOUT: !25 = distinct !DISubprogram(name: "Op", linkageName: "_COp.bfd302cd235977c4:core.Destroy.Core", scope: null, file: !6, line: 13, type: !26, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !29)
+// CHECK:STDOUT: !26 = !DISubroutineType(types: !27)
+// CHECK:STDOUT: !27 = !{null, !28}
+// CHECK:STDOUT: !28 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !29 = !{!30}
+// CHECK:STDOUT: !30 = !DILocalVariable(arg: 1, scope: !25, type: !28)
+// CHECK:STDOUT: !31 = !DILocation(line: 13, column: 42, scope: !25)
+// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "InitVectorLike", linkageName: "_CInitVectorLike.Main", scope: null, file: !6, line: 17, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !33 = !DILocation(line: 18, column: 3, scope: !32)
+// CHECK:STDOUT: !34 = !DILocation(line: 18, column: 28, scope: !32)
+// CHECK:STDOUT: !35 = !DILocation(line: 19, column: 3, scope: !32)
+// CHECK:STDOUT: !36 = !DILocation(line: 17, column: 1, scope: !32)
+// CHECK:STDOUT: !37 = !{!38, !38, i64 0}
+// CHECK:STDOUT: !38 = !{!"p1 _ZTSSt16initializer_listIiE", !39, i64 0}
+// CHECK:STDOUT: !39 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !40 = !{!41, !41, i64 0}
+// CHECK:STDOUT: !41 = !{!"p1 _ZTS11vector_like", !39, i64 0}
+// CHECK:STDOUT: !42 = !{i64 0, i64 8, !43, i64 8, i64 8, !43}
+// CHECK:STDOUT: !43 = !{!44, !44, i64 0}
+// CHECK:STDOUT: !44 = !{!"p1 int", !39, i64 0}
+// CHECK:STDOUT: !45 = distinct !DISubprogram(name: "InitNontrivialDtor", linkageName: "_CInitNontrivialDtor.Main", scope: null, file: !6, line: 22, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !46 = !DILocation(line: 23, column: 3, scope: !45)
+// CHECK:STDOUT: !47 = !DILocation(line: 23, column: 58, scope: !45)
+// CHECK:STDOUT: !48 = !DILocation(line: 24, column: 3, scope: !45)
+// CHECK:STDOUT: !49 = !DILocation(line: 22, column: 1, scope: !45)
+// CHECK:STDOUT: !50 = !{!51, !51, i64 0}
+// CHECK:STDOUT: !51 = !{!"p1 _ZTS15nontrivial_dtor", !39, i64 0}
+// CHECK:STDOUT: !52 = distinct !DISubprogram(name: "Op", linkageName: "_COp.3c5ceecfa63e1bfb:core.Destroy.Core", scope: null, file: !6, line: 23, type: !26, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !53)
 // CHECK:STDOUT: !53 = !{!54}
-// CHECK:STDOUT: !54 = !DILocalVariable(arg: 1, scope: !52, type: !38)
+// CHECK:STDOUT: !54 = !DILocalVariable(arg: 1, scope: !52, type: !28)
 // CHECK:STDOUT: !55 = !DILocation(line: 23, column: 58, scope: !52)
 // CHECK:STDOUT: ; ModuleID = 'use_pointer_size.carbon'
 // CHECK:STDOUT: source_filename = "use_pointer_size.carbon"
@@ -366,28 +367,84 @@ fn InitNontrivialDtor() {
 // CHECK:STDOUT:
 // CHECK:STDOUT: %"class.std::initializer_list" = type { ptr, i64 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: $_ZN11vector_likeC2ESt16initializer_listIiE = comdat any
-// CHECK:STDOUT:
-// CHECK:STDOUT: $_ZN15nontrivial_dtorC2Ev = comdat any
-// CHECK:STDOUT:
 // CHECK:STDOUT: $_ZN11vector_likeD2Ev = comdat any
 // CHECK:STDOUT:
 // CHECK:STDOUT: $_ZN15nontrivial_dtorD2Ev = comdat any
 // CHECK:STDOUT:
+// CHECK:STDOUT: $_ZN11vector_likeC2ESt16initializer_listIiE = comdat any
+// CHECK:STDOUT:
+// CHECK:STDOUT: $_ZN15nontrivial_dtorC2Ev = comdat any
+// CHECK:STDOUT:
 // CHECK:STDOUT: @array = internal constant [3 x i32] [i32 1, i32 2, i32 3]
 // CHECK:STDOUT: @array.loc13_50.15 = internal constant [3 x i32] [i32 1, i32 2, i32 3]
 // CHECK:STDOUT:
+// CHECK:STDOUT: declare void @_CWithinLifetime.Main()
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CInitDirectly.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 1, !dbg !14
+// CHECK:STDOUT:   %.loc13_50.3.temp = alloca [3 x i32], align 4, !dbg !15
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !14
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc13_50.3.temp), !dbg !15
+// CHECK:STDOUT:   %.loc13_50.4.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 0, !dbg !15
+// CHECK:STDOUT:   %.loc13_50.7.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 1, !dbg !15
+// CHECK:STDOUT:   %.loc13_50.10.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 2, !dbg !15
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 0, !dbg !14
+// CHECK:STDOUT:   store ptr @array.loc13_50.15, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !14
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.size = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 8, !dbg !14
+// CHECK:STDOUT:   store i64 3, ptr %initializer_list.initializer_list.call.init_list.size, align 8, !dbg !14
+// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !16
+// CHECK:STDOUT:   call void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr @array), !dbg !15
+// CHECK:STDOUT:   ret void, !dbg !17
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #0 !dbg !18 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   ret void, !dbg !24
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define weak_odr void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr %self) #0 !dbg !25 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   ret void, !dbg !31
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CInitVectorLike.Main() #0 !dbg !32 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %_.var = alloca [1 x i8], align 1, !dbg !33
+// CHECK:STDOUT:   %.loc18_36.2.temp = alloca [16 x i8], align 1, !dbg !34
+// CHECK:STDOUT:   %.loc18_36.4.temp = alloca [3 x i32], align 4, !dbg !34
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !33
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_36.2.temp), !dbg !34
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_36.4.temp), !dbg !34
+// CHECK:STDOUT:   %.loc18_36.5.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 0, !dbg !34
+// CHECK:STDOUT:   %.loc18_36.8.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 1, !dbg !34
+// CHECK:STDOUT:   %.loc18_36.11.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 2, !dbg !34
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %.loc18_36.2.temp, i32 0, i32 0, !dbg !34
+// CHECK:STDOUT:   store ptr @array.loc13_50.15, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !34
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.size = getelementptr inbounds nuw [16 x i8], ptr %.loc18_36.2.temp, i32 0, i32 8, !dbg !34
+// CHECK:STDOUT:   store i64 3, ptr %initializer_list.initializer_list.call.init_list.size, align 8, !dbg !34
+// CHECK:STDOUT:   call void @_ZN11vector_likeC1ESt16initializer_listIiE.carbon_thunk(ptr %.loc18_36.2.temp, ptr %_.var), !dbg !33
+// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !35
+// CHECK:STDOUT:   call void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr @array), !dbg !34
+// CHECK:STDOUT:   call void @_ZN11vector_likeD2Ev(ptr %_.var), !dbg !33
+// CHECK:STDOUT:   ret void, !dbg !36
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_ZN11vector_likeC1ESt16initializer_listIiE.carbon_thunk(ptr noundef %list, ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_ZN11vector_likeC1ESt16initializer_listIiE.carbon_thunk(ptr noundef %list, ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %list.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %"class.std::initializer_list", align 8
-// CHECK:STDOUT:   store ptr %list, ptr %list.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !14
-// CHECK:STDOUT:   %1 = load ptr, ptr %list.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 8 %agg.tmp, ptr align 8 %1, i64 16, i1 false), !tbaa.struct !16
+// CHECK:STDOUT:   store ptr %list, ptr %list.addr, align 8, !tbaa !37
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !40
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !40
+// CHECK:STDOUT:   %1 = load ptr, ptr %list.addr, align 8, !tbaa !37
+// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 8 %agg.tmp, ptr align 8 %1, i64 16, i1 false), !tbaa.struct !42
 // CHECK:STDOUT:   %2 = getelementptr inbounds nuw { ptr, i64 }, ptr %agg.tmp, i32 0, i32 0
 // CHECK:STDOUT:   %3 = load ptr, ptr %2, align 8
 // CHECK:STDOUT:   %4 = getelementptr inbounds nuw { ptr, i64 }, ptr %agg.tmp, i32 0, i32 1
@@ -396,155 +453,100 @@ fn InitNontrivialDtor() {
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #1
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN11vector_likeC2ESt16initializer_listIiE(ptr noundef nonnull align 1 dereferenceable(1) %this, ptr %list.coerce0, i64 %list.coerce1) unnamed_addr #2 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN11vector_likeD2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %list = alloca %"class.std::initializer_list", align 8
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   %0 = getelementptr inbounds nuw { ptr, i64 }, ptr %list, i32 0, i32 0
-// CHECK:STDOUT:   store ptr %list.coerce0, ptr %0, align 8
-// CHECK:STDOUT:   %1 = getelementptr inbounds nuw { ptr, i64 }, ptr %list, i32 0, i32 1
-// CHECK:STDOUT:   store i64 %list.coerce1, ptr %1, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !14
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !40
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CInitNontrivialDtor.Main() #0 !dbg !47 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 1, !dbg !48
+// CHECK:STDOUT:   %.loc23_69.17.temp = alloca [3 x [1 x i8]], align 1, !dbg !49
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !48
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc23_69.17.temp), !dbg !49
+// CHECK:STDOUT:   %.loc23_69.18.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 0, !dbg !49
+// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.18.array.index), !dbg !49
+// CHECK:STDOUT:   %.loc23_69.16.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 1, !dbg !49
+// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.16.array.index), !dbg !49
+// CHECK:STDOUT:   %.loc23_69.15.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 2, !dbg !49
+// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.15.array.index), !dbg !49
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 0, !dbg !48
+// CHECK:STDOUT:   store ptr %.loc23_69.17.temp, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !48
+// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.size = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 8, !dbg !48
+// CHECK:STDOUT:   store i64 3, ptr %initializer_list.initializer_list.call.init_list.size, align 8, !dbg !48
+// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !50
+// CHECK:STDOUT:   call void @"_COp.3c5ceecfa63e1bfb:core.Destroy.Core"(ptr %.loc23_69.17.temp), !dbg !49
+// CHECK:STDOUT:   ret void, !dbg !51
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !21
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !21
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !52
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !52
 // CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %0)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN15nontrivial_dtorC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN15nontrivial_dtorD2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !21
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !52
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_CWithinLifetime.Main()
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CInitDirectly.Main() #3 !dbg !23 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 1, !dbg !26
-// CHECK:STDOUT:   %.loc13_50.3.temp = alloca [3 x i32], align 4, !dbg !27
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !26
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc13_50.3.temp), !dbg !27
-// CHECK:STDOUT:   %.loc13_50.4.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 0, !dbg !27
-// CHECK:STDOUT:   %.loc13_50.7.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 1, !dbg !27
-// CHECK:STDOUT:   %.loc13_50.10.array.index = getelementptr inbounds [3 x i32], ptr %.loc13_50.3.temp, i32 0, i64 2, !dbg !27
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 0, !dbg !26
-// CHECK:STDOUT:   store ptr @array.loc13_50.15, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !26
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.size = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 8, !dbg !26
-// CHECK:STDOUT:   store i64 3, ptr %initializer_list.initializer_list.call.init_list.size, align 8, !dbg !26
-// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !28
-// CHECK:STDOUT:   call void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr @array), !dbg !27
-// CHECK:STDOUT:   ret void, !dbg !29
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.7e389eab4a7e5487:core.Destroy.Core"(ptr %self) #3 !dbg !30 {
+// CHECK:STDOUT: define weak_odr void @"_COp.3c5ceecfa63e1bfb:core.Destroy.Core"(ptr %self) #0 !dbg !54 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !36
+// CHECK:STDOUT:   ret void, !dbg !57
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr %self) #3 !dbg !37 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !43
-// CHECK:STDOUT: }
+// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CInitVectorLike.Main() #3 !dbg !44 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %_.var = alloca [1 x i8], align 1, !dbg !45
-// CHECK:STDOUT:   %.loc18_36.2.temp = alloca [16 x i8], align 1, !dbg !46
-// CHECK:STDOUT:   %.loc18_36.4.temp = alloca [3 x i32], align 4, !dbg !46
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !45
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_36.2.temp), !dbg !46
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_36.4.temp), !dbg !46
-// CHECK:STDOUT:   %.loc18_36.5.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 0, !dbg !46
-// CHECK:STDOUT:   %.loc18_36.8.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 1, !dbg !46
-// CHECK:STDOUT:   %.loc18_36.11.array.index = getelementptr inbounds [3 x i32], ptr %.loc18_36.4.temp, i32 0, i64 2, !dbg !46
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %.loc18_36.2.temp, i32 0, i32 0, !dbg !46
-// CHECK:STDOUT:   store ptr @array.loc13_50.15, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !46
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.size = getelementptr inbounds nuw [16 x i8], ptr %.loc18_36.2.temp, i32 0, i32 8, !dbg !46
-// CHECK:STDOUT:   store i64 3, ptr %initializer_list.initializer_list.call.init_list.size, align 8, !dbg !46
-// CHECK:STDOUT:   call void @_ZN11vector_likeC1ESt16initializer_listIiE.carbon_thunk(ptr %.loc18_36.2.temp, ptr %_.var), !dbg !45
-// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !47
-// CHECK:STDOUT:   call void @"_COp.bfd302cd235977c4:core.Destroy.Core"(ptr @array), !dbg !46
-// CHECK:STDOUT:   call void @_ZN11vector_likeD2Ev(ptr %_.var), !dbg !45
-// CHECK:STDOUT:   ret void, !dbg !48
-// CHECK:STDOUT: }
+// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
+// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #4
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN11vector_likeD2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN11vector_likeC2ESt16initializer_listIiE(ptr noundef nonnull align 1 dereferenceable(1) %this, ptr %list.coerce0, i64 %list.coerce1) unnamed_addr #2 comdat align 2 {
 // CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %list = alloca %"class.std::initializer_list", align 8
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !14
+// CHECK:STDOUT:   %0 = getelementptr inbounds nuw { ptr, i64 }, ptr %list, i32 0, i32 0
+// CHECK:STDOUT:   store ptr %list.coerce0, ptr %0, align 8
+// CHECK:STDOUT:   %1 = getelementptr inbounds nuw { ptr, i64 }, ptr %list, i32 0, i32 1
+// CHECK:STDOUT:   store i64 %list.coerce1, ptr %1, align 8
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !40
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CInitNontrivialDtor.Main() #3 !dbg !49 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 1, !dbg !50
-// CHECK:STDOUT:   %.loc23_69.17.temp = alloca [3 x [1 x i8]], align 1, !dbg !51
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !50
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc23_69.17.temp), !dbg !51
-// CHECK:STDOUT:   %.loc23_69.18.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 0, !dbg !51
-// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.18.array.index), !dbg !51
-// CHECK:STDOUT:   %.loc23_69.16.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 1, !dbg !51
-// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.16.array.index), !dbg !51
-// CHECK:STDOUT:   %.loc23_69.15.array.index = getelementptr inbounds [3 x [1 x i8]], ptr %.loc23_69.17.temp, i32 0, i64 2, !dbg !51
-// CHECK:STDOUT:   call void @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple(ptr %.loc23_69.15.array.index), !dbg !51
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.begin = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 0, !dbg !50
-// CHECK:STDOUT:   store ptr %.loc23_69.17.temp, ptr %initializer_list.initializer_list.call.init_list.begin, align 8, !dbg !50
-// CHECK:STDOUT:   %initializer_list.initializer_list.call.init_list.size = getelementptr inbounds nuw [16 x i8], ptr %_.var, i32 0, i32 8, !dbg !50
-// CHECK:STDOUT:   store i64 3, ptr %initializer_list.initializer_list.call.init_list.size, align 8, !dbg !50
-// CHECK:STDOUT:   call void @_CWithinLifetime.Main(), !dbg !52
-// CHECK:STDOUT:   call void @"_COp.3c5ceecfa63e1bfb:core.Destroy.Core"(ptr %.loc23_69.17.temp), !dbg !51
-// CHECK:STDOUT:   ret void, !dbg !53
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN15nontrivial_dtorD2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN15nontrivial_dtorC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #2 comdat align 2 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !21
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !52
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.3c5ceecfa63e1bfb:core.Destroy.Core"(ptr %self) #3 !dbg !54 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !57
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #4
-// CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
+// CHECK:STDOUT: uselistorder ptr @_ZN15nontrivial_dtorC1Ev.carbon_thunk_tuple, { 2, 1, 0 }
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 6, 5, 4, 3, 2, 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT: attributes #2 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #3 = { nounwind }
-// CHECK:STDOUT: attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #4 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -561,50 +563,50 @@ fn InitNontrivialDtor() {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTSSt16initializer_listIiE", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{!15, !15, i64 0}
-// CHECK:STDOUT: !15 = !{!"p1 _ZTS11vector_like", !13, i64 0}
-// CHECK:STDOUT: !16 = !{i64 0, i64 8, !17, i64 8, i64 8, !19}
-// CHECK:STDOUT: !17 = !{!18, !18, i64 0}
-// CHECK:STDOUT: !18 = !{!"p1 int", !13, i64 0}
-// CHECK:STDOUT: !19 = !{!20, !20, i64 0}
-// CHECK:STDOUT: !20 = !{!"long", !9, i64 0}
-// CHECK:STDOUT: !21 = !{!22, !22, i64 0}
-// CHECK:STDOUT: !22 = !{!"p1 _ZTS15nontrivial_dtor", !13, i64 0}
-// CHECK:STDOUT: !23 = distinct !DISubprogram(name: "InitDirectly", linkageName: "_CInitDirectly.Main", scope: null, file: !6, line: 12, type: !24, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !24 = !DISubroutineType(types: !25)
-// CHECK:STDOUT: !25 = !{null}
-// CHECK:STDOUT: !26 = !DILocation(line: 13, column: 3, scope: !23)
-// CHECK:STDOUT: !27 = !DILocation(line: 13, column: 42, scope: !23)
-// CHECK:STDOUT: !28 = !DILocation(line: 14, column: 3, scope: !23)
-// CHECK:STDOUT: !29 = !DILocation(line: 12, column: 1, scope: !23)
-// CHECK:STDOUT: !30 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !6, line: 13, type: !31, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !34)
-// CHECK:STDOUT: !31 = !DISubroutineType(types: !32)
-// CHECK:STDOUT: !32 = !{null, !33}
-// CHECK:STDOUT: !33 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !34 = !{!35}
-// CHECK:STDOUT: !35 = !DILocalVariable(arg: 1, scope: !30, type: !33)
-// CHECK:STDOUT: !36 = !DILocation(line: 13, column: 42, scope: !30)
-// CHECK:STDOUT: !37 = distinct !DISubprogram(name: "Op", linkageName: "_COp.bfd302cd235977c4:core.Destroy.Core", scope: null, file: !6, line: 13, type: !38, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !41)
-// CHECK:STDOUT: !38 = !DISubroutineType(types: !39)
-// CHECK:STDOUT: !39 = !{null, !40}
-// CHECK:STDOUT: !40 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !41 = !{!42}
-// CHECK:STDOUT: !42 = !DILocalVariable(arg: 1, scope: !37, type: !40)
-// CHECK:STDOUT: !43 = !DILocation(line: 13, column: 42, scope: !37)
-// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "InitVectorLike", linkageName: "_CInitVectorLike.Main", scope: null, file: !6, line: 17, type: !24, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !45 = !DILocation(line: 18, column: 3, scope: !44)
-// CHECK:STDOUT: !46 = !DILocation(line: 18, column: 28, scope: !44)
-// CHECK:STDOUT: !47 = !DILocation(line: 19, column: 3, scope: !44)
-// CHECK:STDOUT: !48 = !DILocation(line: 17, column: 1, scope: !44)
-// CHECK:STDOUT: !49 = distinct !DISubprogram(name: "InitNontrivialDtor", linkageName: "_CInitNontrivialDtor.Main", scope: null, file: !6, line: 22, type: !24, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !50 = !DILocation(line: 23, column: 3, scope: !49)
-// CHECK:STDOUT: !51 = !DILocation(line: 23, column: 58, scope: !49)
-// CHECK:STDOUT: !52 = !DILocation(line: 24, column: 3, scope: !49)
-// CHECK:STDOUT: !53 = !DILocation(line: 22, column: 1, scope: !49)
-// CHECK:STDOUT: !54 = distinct !DISubprogram(name: "Op", linkageName: "_COp.3c5ceecfa63e1bfb:core.Destroy.Core", scope: null, file: !6, line: 23, type: !38, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !55)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "InitDirectly", linkageName: "_CInitDirectly.Main", scope: null, file: !6, line: 12, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 13, column: 3, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 13, column: 42, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 14, column: 3, scope: !11)
+// CHECK:STDOUT: !17 = !DILocation(line: 12, column: 1, scope: !11)
+// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "Op", linkageName: "_COp.7e389eab4a7e5487:core.Destroy.Core", scope: null, file: !6, line: 13, type: !19, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !22)
+// CHECK:STDOUT: !19 = !DISubroutineType(types: !20)
+// CHECK:STDOUT: !20 = !{null, !21}
+// CHECK:STDOUT: !21 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !22 = !{!23}
+// CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !18, type: !21)
+// CHECK:STDOUT: !24 = !DILocation(line: 13, column: 42, scope: !18)
+// CHECK:STDOUT: !25 = distinct !DISubprogram(name: "Op", linkageName: "_COp.bfd302cd235977c4:core.Destroy.Core", scope: null, file: !6, line: 13, type: !26, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !29)
+// CHECK:STDOUT: !26 = !DISubroutineType(types: !27)
+// CHECK:STDOUT: !27 = !{null, !28}
+// CHECK:STDOUT: !28 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !29 = !{!30}
+// CHECK:STDOUT: !30 = !DILocalVariable(arg: 1, scope: !25, type: !28)
+// CHECK:STDOUT: !31 = !DILocation(line: 13, column: 42, scope: !25)
+// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "InitVectorLike", linkageName: "_CInitVectorLike.Main", scope: null, file: !6, line: 17, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !33 = !DILocation(line: 18, column: 3, scope: !32)
+// CHECK:STDOUT: !34 = !DILocation(line: 18, column: 28, scope: !32)
+// CHECK:STDOUT: !35 = !DILocation(line: 19, column: 3, scope: !32)
+// CHECK:STDOUT: !36 = !DILocation(line: 17, column: 1, scope: !32)
+// CHECK:STDOUT: !37 = !{!38, !38, i64 0}
+// CHECK:STDOUT: !38 = !{!"p1 _ZTSSt16initializer_listIiE", !39, i64 0}
+// CHECK:STDOUT: !39 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !40 = !{!41, !41, i64 0}
+// CHECK:STDOUT: !41 = !{!"p1 _ZTS11vector_like", !39, i64 0}
+// CHECK:STDOUT: !42 = !{i64 0, i64 8, !43, i64 8, i64 8, !45}
+// CHECK:STDOUT: !43 = !{!44, !44, i64 0}
+// CHECK:STDOUT: !44 = !{!"p1 int", !39, i64 0}
+// CHECK:STDOUT: !45 = !{!46, !46, i64 0}
+// CHECK:STDOUT: !46 = !{!"long", !9, i64 0}
+// CHECK:STDOUT: !47 = distinct !DISubprogram(name: "InitNontrivialDtor", linkageName: "_CInitNontrivialDtor.Main", scope: null, file: !6, line: 22, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !48 = !DILocation(line: 23, column: 3, scope: !47)
+// CHECK:STDOUT: !49 = !DILocation(line: 23, column: 58, scope: !47)
+// CHECK:STDOUT: !50 = !DILocation(line: 24, column: 3, scope: !47)
+// CHECK:STDOUT: !51 = !DILocation(line: 22, column: 1, scope: !47)
+// CHECK:STDOUT: !52 = !{!53, !53, i64 0}
+// CHECK:STDOUT: !53 = !{!"p1 _ZTS15nontrivial_dtor", !39, i64 0}
+// CHECK:STDOUT: !54 = distinct !DISubprogram(name: "Op", linkageName: "_COp.3c5ceecfa63e1bfb:core.Destroy.Core", scope: null, file: !6, line: 23, type: !26, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !55)
 // CHECK:STDOUT: !55 = !{!56}
-// CHECK:STDOUT: !56 = !DILocalVariable(arg: 1, scope: !54, type: !40)
+// CHECK:STDOUT: !56 = !DILocalVariable(arg: 1, scope: !54, type: !28)
 // CHECK:STDOUT: !57 = !DILocation(line: 23, column: 58, scope: !54)

toolchain/lower/testdata/interop/cpp/template.carbon

@@ -96,37 +96,15 @@ fn Call3() {
 // CHECK:STDOUT:
 // CHECK:STDOUT: %class.Class = type { i8 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: $_Z8identityI5ClassET_S1_ = comdat any
-// CHECK:STDOUT:
 // CHECK:STDOUT: $_Z8identityIiET_S0_ = comdat any
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z8identityI5ClassET_S1_.carbon_thunk(ptr noundef %x, ptr noundef %return) #0 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %x.addr = alloca ptr, align 8
-// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   %agg.tmp = alloca %class.Class, align 1
-// CHECK:STDOUT:   %undef.agg.tmp = alloca %class.Class, align 1
-// CHECK:STDOUT:   store ptr %x, ptr %x.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %x.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   call void @_Z8identityI5ClassET_S1_()
-// CHECK:STDOUT:   ret void
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_Z8identityI5ClassET_S1_() #1 comdat {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %x = alloca %class.Class, align 1
-// CHECK:STDOUT:   ret void
-// CHECK:STDOUT: }
+// CHECK:STDOUT: $_Z8identityI5ClassET_S1_ = comdat any
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CPassI32.Main(i32 %a) #2 !dbg !14 {
+// CHECK:STDOUT: define i32 @_CPassI32.Main(i32 %a) #0 !dbg !11 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %identity.call = call i32 @_Z8identityIiET_S0_(i32 %a), !dbg !20
-// CHECK:STDOUT:   ret i32 %identity.call, !dbg !21
+// CHECK:STDOUT:   %identity.call = call i32 @_Z8identityIiET_S0_(i32 %a), !dbg !17
+// CHECK:STDOUT:   ret i32 %identity.call, !dbg !18
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
@@ -139,22 +117,44 @@ fn Call3() {
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CPassI32Explicitly.Main(i32 %a) #2 !dbg !22 {
+// CHECK:STDOUT: define i32 @_CPassI32Explicitly.Main(i32 %a) #0 !dbg !19 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %identity.call = call i32 @_Z8identityIiET_S0_(i32 %a), !dbg !25
-// CHECK:STDOUT:   ret i32 %identity.call, !dbg !26
+// CHECK:STDOUT:   %identity.call = call i32 @_Z8identityIiET_S0_(i32 %a), !dbg !22
+// CHECK:STDOUT:   ret i32 %identity.call, !dbg !23
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassClass.Main(ptr sret({}) %return, ptr %a) #2 !dbg !27 {
+// CHECK:STDOUT: define void @_CPassClass.Main(ptr sret({}) %return, ptr %a) #0 !dbg !24 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z8identityI5ClassET_S1_.carbon_thunk(ptr %a, ptr %return), !dbg !33
-// CHECK:STDOUT:   ret void, !dbg !34
+// CHECK:STDOUT:   call void @_Z8identityI5ClassET_S1_.carbon_thunk(ptr %a, ptr %return), !dbg !30
+// CHECK:STDOUT:   ret void, !dbg !31
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
+// CHECK:STDOUT: define internal void @_Z8identityI5ClassET_S1_.carbon_thunk(ptr noundef %x, ptr noundef %return) #2 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %x.addr = alloca ptr, align 8
+// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
+// CHECK:STDOUT:   %agg.tmp = alloca %class.Class, align 1
+// CHECK:STDOUT:   %undef.agg.tmp = alloca %class.Class, align 1
+// CHECK:STDOUT:   store ptr %x, ptr %x.addr, align 8, !tbaa !32
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !32
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !32
+// CHECK:STDOUT:   %1 = load ptr, ptr %x.addr, align 8, !tbaa !32
+// CHECK:STDOUT:   call void @_Z8identityI5ClassET_S1_()
+// CHECK:STDOUT:   ret void
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
+// CHECK:STDOUT: define linkonce_odr dso_local void @_Z8identityI5ClassET_S1_() #1 comdat {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %x = alloca %class.Class, align 1
+// CHECK:STDOUT:   ret void
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: attributes #0 = { nounwind }
 // CHECK:STDOUT: attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
+// CHECK:STDOUT: attributes #2 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -171,30 +171,30 @@ fn Call3() {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS5Class", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = distinct !DISubprogram(name: "PassI32", linkageName: "_CPassI32.Main", scope: null, file: !6, line: 6, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !18)
-// CHECK:STDOUT: !15 = !DISubroutineType(types: !16)
-// CHECK:STDOUT: !16 = !{!17, !17}
-// CHECK:STDOUT: !17 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !18 = !{!19}
-// CHECK:STDOUT: !19 = !DILocalVariable(arg: 1, scope: !14, type: !17)
-// CHECK:STDOUT: !20 = !DILocation(line: 7, column: 10, scope: !14)
-// CHECK:STDOUT: !21 = !DILocation(line: 7, column: 3, scope: !14)
-// CHECK:STDOUT: !22 = distinct !DISubprogram(name: "PassI32Explicitly", linkageName: "_CPassI32Explicitly.Main", scope: null, file: !6, line: 10, type: !15, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !23)
-// CHECK:STDOUT: !23 = !{!24}
-// CHECK:STDOUT: !24 = !DILocalVariable(arg: 1, scope: !22, type: !17)
-// CHECK:STDOUT: !25 = !DILocation(line: 11, column: 10, scope: !22)
-// CHECK:STDOUT: !26 = !DILocation(line: 11, column: 3, scope: !22)
-// CHECK:STDOUT: !27 = distinct !DISubprogram(name: "PassClass", linkageName: "_CPassClass.Main", scope: null, file: !6, line: 14, type: !28, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !31)
-// CHECK:STDOUT: !28 = !DISubroutineType(types: !29)
-// CHECK:STDOUT: !29 = !{!30, !30}
-// CHECK:STDOUT: !30 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !31 = !{!32}
-// CHECK:STDOUT: !32 = !DILocalVariable(arg: 1, scope: !27, type: !30)
-// CHECK:STDOUT: !33 = !DILocation(line: 15, column: 10, scope: !27)
-// CHECK:STDOUT: !34 = !DILocation(line: 15, column: 3, scope: !27)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "PassI32", linkageName: "_CPassI32.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !15)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{!14, !14}
+// CHECK:STDOUT: !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !15 = !{!16}
+// CHECK:STDOUT: !16 = !DILocalVariable(arg: 1, scope: !11, type: !14)
+// CHECK:STDOUT: !17 = !DILocation(line: 7, column: 10, scope: !11)
+// CHECK:STDOUT: !18 = !DILocation(line: 7, column: 3, scope: !11)
+// CHECK:STDOUT: !19 = distinct !DISubprogram(name: "PassI32Explicitly", linkageName: "_CPassI32Explicitly.Main", scope: null, file: !6, line: 10, type: !12, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !20)
+// CHECK:STDOUT: !20 = !{!21}
+// CHECK:STDOUT: !21 = !DILocalVariable(arg: 1, scope: !19, type: !14)
+// CHECK:STDOUT: !22 = !DILocation(line: 11, column: 10, scope: !19)
+// CHECK:STDOUT: !23 = !DILocation(line: 11, column: 3, scope: !19)
+// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "PassClass", linkageName: "_CPassClass.Main", scope: null, file: !6, line: 14, type: !25, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !28)
+// CHECK:STDOUT: !25 = !DISubroutineType(types: !26)
+// CHECK:STDOUT: !26 = !{!27, !27}
+// CHECK:STDOUT: !27 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !28 = !{!29}
+// CHECK:STDOUT: !29 = !DILocalVariable(arg: 1, scope: !24, type: !27)
+// CHECK:STDOUT: !30 = !DILocation(line: 15, column: 10, scope: !24)
+// CHECK:STDOUT: !31 = !DILocation(line: 15, column: 3, scope: !24)
+// CHECK:STDOUT: !32 = !{!33, !33, i64 0}
+// CHECK:STDOUT: !33 = !{!"p1 _ZTS5Class", !34, i64 0}
+// CHECK:STDOUT: !34 = !{!"any pointer", !9, i64 0}
 // CHECK:STDOUT: ; ModuleID = 'variadic.carbon'
 // CHECK:STDOUT: source_filename = "variadic.carbon"
 // CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
@@ -266,91 +266,91 @@ fn Call3() {
 // CHECK:STDOUT: @X.val = internal constant {} zeroinitializer
 // CHECK:STDOUT: @X.val.loc12_14.3 = internal constant {} zeroinitializer
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CCall1.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.loc12_12.2.temp = alloca {}, align 8, !dbg !14
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc12_12.2.temp), !dbg !14
+// CHECK:STDOUT:   call void @_Z3fooIJEEv1XDpT_.carbon_thunk(ptr @X.val.loc12_14.3), !dbg !15
+// CHECK:STDOUT:   ret void, !dbg !16
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z3fooIJEEv1XDpT_.carbon_thunk(ptr noundef %0) #0 {
+// CHECK:STDOUT: define internal void @_Z3fooIJEEv1XDpT_.carbon_thunk(ptr noundef %0) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %agg.tmp = alloca %class.X, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !17
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !17
 // CHECK:STDOUT:   call void @_Z3fooIJEEv1XDpT_()
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z3fooIJEEv1XDpT_() #1
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CCall2.Main() #0 !dbg !20 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.loc18_12.2.temp = alloca {}, align 8, !dbg !21
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_12.2.temp), !dbg !21
+// CHECK:STDOUT:   call void @_Z3fooIJiEEv1XDpT_.carbon_thunk(ptr @X.val.loc12_14.3, i32 2), !dbg !22
+// CHECK:STDOUT:   ret void, !dbg !23
+// CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z3fooIJiEEv1XDpT_.carbon_thunk(ptr noundef %0, i32 noundef %1) #0 {
+// CHECK:STDOUT: define internal void @_Z3fooIJiEEv1XDpT_.carbon_thunk(ptr noundef %0, i32 noundef %1) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %.addr1 = alloca i32, align 4
 // CHECK:STDOUT:   %agg.tmp = alloca %class.X, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !17
 // CHECK:STDOUT:   store i32 %1, ptr %.addr1, align 4, !tbaa !7
-// CHECK:STDOUT:   %2 = load ptr, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   %2 = load ptr, ptr %.addr, align 8, !tbaa !17
 // CHECK:STDOUT:   %3 = load i32, ptr %.addr1, align 4, !tbaa !7
 // CHECK:STDOUT:   call void @_Z3fooIJiEEv1XDpT_(i32 noundef %3)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z3fooIJiEEv1XDpT_(i32 noundef) #1
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CCall3.Main() #0 !dbg !24 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.loc24_12.2.temp = alloca {}, align 8, !dbg !25
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc24_12.2.temp), !dbg !25
+// CHECK:STDOUT:   call void @_Z3fooIJiiEEv1XDpT_.carbon_thunk(ptr @X.val.loc12_14.3, i32 2, i32 3), !dbg !26
+// CHECK:STDOUT:   ret void, !dbg !27
+// CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_Z3fooIJiiEEv1XDpT_.carbon_thunk(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
+// CHECK:STDOUT: define internal void @_Z3fooIJiiEEv1XDpT_.carbon_thunk(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %.addr1 = alloca i32, align 4
 // CHECK:STDOUT:   %.addr2 = alloca i32, align 4
 // CHECK:STDOUT:   %agg.tmp = alloca %class.X, align 1
-// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !17
 // CHECK:STDOUT:   store i32 %1, ptr %.addr1, align 4, !tbaa !7
 // CHECK:STDOUT:   store i32 %2, ptr %.addr2, align 4, !tbaa !7
-// CHECK:STDOUT:   %3 = load ptr, ptr %.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   %3 = load ptr, ptr %.addr, align 8, !tbaa !17
 // CHECK:STDOUT:   %4 = load i32, ptr %.addr1, align 4, !tbaa !7
 // CHECK:STDOUT:   %5 = load i32, ptr %.addr2, align 4, !tbaa !7
 // CHECK:STDOUT:   call void @_Z3fooIJiiEEv1XDpT_(i32 noundef %4, i32 noundef %5)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: declare void @_Z3fooIJiiEEv1XDpT_(i32 noundef, i32 noundef) #1
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CCall1.Main() #2 !dbg !14 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc12_12.2.temp = alloca {}, align 8, !dbg !17
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc12_12.2.temp), !dbg !17
-// CHECK:STDOUT:   call void @_Z3fooIJEEv1XDpT_.carbon_thunk(ptr @X.val.loc12_14.3), !dbg !18
-// CHECK:STDOUT:   ret void, !dbg !19
-// CHECK:STDOUT: }
+// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #2
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CCall2.Main() #2 !dbg !20 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc18_12.2.temp = alloca {}, align 8, !dbg !21
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_12.2.temp), !dbg !21
-// CHECK:STDOUT:   call void @_Z3fooIJiEEv1XDpT_.carbon_thunk(ptr @X.val.loc12_14.3, i32 2), !dbg !22
-// CHECK:STDOUT:   ret void, !dbg !23
-// CHECK:STDOUT: }
+// CHECK:STDOUT: declare void @_Z3fooIJEEv1XDpT_() #3
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CCall3.Main() #2 !dbg !24 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc24_12.2.temp = alloca {}, align 8, !dbg !25
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc24_12.2.temp), !dbg !25
-// CHECK:STDOUT:   call void @_Z3fooIJiiEEv1XDpT_.carbon_thunk(ptr @X.val.loc12_14.3, i32 2, i32 3), !dbg !26
-// CHECK:STDOUT:   ret void, !dbg !27
-// CHECK:STDOUT: }
+// CHECK:STDOUT: declare void @_Z3fooIJiEEv1XDpT_(i32 noundef) #3
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
+// CHECK:STDOUT: declare void @_Z3fooIJiiEEv1XDpT_(i32 noundef, i32 noundef) #3
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
 // CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 2, 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
-// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #3 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
 // CHECK:STDOUT: !llvm.dbg.cu = !{!5}
@@ -367,20 +367,20 @@ fn Call3() {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1X", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = distinct !DISubprogram(name: "Call1", linkageName: "_CCall1.Main", scope: null, file: !6, line: 10, type: !15, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !15 = !DISubroutineType(types: !16)
-// CHECK:STDOUT: !16 = !{null}
-// CHECK:STDOUT: !17 = !DILocation(line: 12, column: 11, scope: !14)
-// CHECK:STDOUT: !18 = !DILocation(line: 12, column: 3, scope: !14)
-// CHECK:STDOUT: !19 = !DILocation(line: 10, column: 1, scope: !14)
-// CHECK:STDOUT: !20 = distinct !DISubprogram(name: "Call2", linkageName: "_CCall2.Main", scope: null, file: !6, line: 16, type: !15, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Call1", linkageName: "_CCall1.Main", scope: null, file: !6, line: 10, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 12, column: 11, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 12, column: 3, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 10, column: 1, scope: !11)
+// CHECK:STDOUT: !17 = !{!18, !18, i64 0}
+// CHECK:STDOUT: !18 = !{!"p1 _ZTS1X", !19, i64 0}
+// CHECK:STDOUT: !19 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !20 = distinct !DISubprogram(name: "Call2", linkageName: "_CCall2.Main", scope: null, file: !6, line: 16, type: !12, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !21 = !DILocation(line: 18, column: 11, scope: !20)
 // CHECK:STDOUT: !22 = !DILocation(line: 18, column: 3, scope: !20)
 // CHECK:STDOUT: !23 = !DILocation(line: 16, column: 1, scope: !20)
-// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "Call3", linkageName: "_CCall3.Main", scope: null, file: !6, line: 22, type: !15, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "Call3", linkageName: "_CCall3.Main", scope: null, file: !6, line: 22, type: !12, spFlags: DISPFlagDefinition, unit: !5)
 // CHECK:STDOUT: !25 = !DILocation(line: 24, column: 11, scope: !24)
 // CHECK:STDOUT: !26 = !DILocation(line: 24, column: 3, scope: !24)
 // CHECK:STDOUT: !27 = !DILocation(line: 22, column: 1, scope: !24)

toolchain/lower/testdata/interop/cpp/virtual_base.carbon

@@ -108,53 +108,53 @@ fn AccessD(d: Cpp.D) -> i32 {
 // CHECK:STDOUT: @_ZTI1D = linkonce_odr dso_local constant { ptr, ptr, i32, i32, ptr, i64, ptr, i64 } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv121__vmi_class_type_infoE, i64 2), ptr @_ZTS1D, i32 2, i32 2, ptr @_ZTI1B, i64 2, ptr @_ZTI1C, i64 4098 }, comdat, align 8
 // CHECK:STDOUT: @_ZTS1D = linkonce_odr dso_local constant [3 x i8] c"1D\00", comdat, align 1
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_CMake.Main() #0 !dbg !11 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %_.var = alloca [40 x i8], align 1, !dbg !14
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !14
+// CHECK:STDOUT:   call void @_ZN1DC1Ev.carbon_thunk(ptr %_.var), !dbg !15
+// CHECK:STDOUT:   ret void, !dbg !16
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
-// CHECK:STDOUT: define dso_local void @_ZN1DC1Ev.carbon_thunk(ptr noundef %return) #0 {
+// CHECK:STDOUT: define internal void @_ZN1DC1Ev.carbon_thunk(ptr noundef %return) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %return.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !11
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !17
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !17
 // CHECK:STDOUT:   call void @_ZN1DC1Ev(ptr noundef nonnull align 8 dereferenceable(32) %0)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define i32 @_CAccessD.Main(ptr %d) #0 !dbg !20 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.loc16_11.1.d = getelementptr inbounds nuw [40 x i8], ptr %d, i32 0, i32 28, !dbg !27
+// CHECK:STDOUT:   %.loc16_11.2 = load i32, ptr %.loc16_11.1.d, align 4, !dbg !27
+// CHECK:STDOUT:   ret i32 %.loc16_11.2, !dbg !28
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
+// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #2
+// CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress uwtable
-// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN1DC1Ev(ptr noundef nonnull align 8 dereferenceable(32) %this) unnamed_addr #1 comdat align 2 {
+// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN1DC1Ev(ptr noundef nonnull align 8 dereferenceable(32) %this) unnamed_addr #3 comdat align 2 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !11
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !17
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   %0 = getelementptr inbounds i8, ptr %this1, i64 32
 // CHECK:STDOUT:   call void @_ZN1AC2Ev(ptr noundef nonnull align 4 dereferenceable(4) %0)
 // CHECK:STDOUT:   call void @_ZN1BC2Ev(ptr noundef nonnull align 8 dereferenceable(12) %this1, ptr noundef getelementptr inbounds nuw (i8, ptr @_ZTT1D, i64 8))
 // CHECK:STDOUT:   %1 = getelementptr inbounds i8, ptr %this1, i64 16
 // CHECK:STDOUT:   call void @_ZN1CC2Ev(ptr noundef nonnull align 8 dereferenceable(12) %1, ptr noundef getelementptr inbounds nuw (i8, ptr @_ZTT1D, i64 16))
-// CHECK:STDOUT:   store ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 0, i32 3), ptr %this1, align 8, !tbaa !14
+// CHECK:STDOUT:   store ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 0, i32 3), ptr %this1, align 8, !tbaa !29
 // CHECK:STDOUT:   %add.ptr = getelementptr inbounds i8, ptr %this1, i64 16
-// CHECK:STDOUT:   store ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 1, i32 3), ptr %add.ptr, align 8, !tbaa !14
+// CHECK:STDOUT:   store ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 1, i32 3), ptr %add.ptr, align 8, !tbaa !29
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CMake.Main() #2 !dbg !16 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %_.var = alloca [40 x i8], align 1, !dbg !19
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !19
-// CHECK:STDOUT:   call void @_ZN1DC1Ev.carbon_thunk(ptr %_.var), !dbg !20
-// CHECK:STDOUT:   ret void, !dbg !21
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CAccessD.Main(ptr %d) #2 !dbg !22 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc16_11.1.d = getelementptr inbounds nuw [40 x i8], ptr %d, i32 0, i32 28, !dbg !29
-// CHECK:STDOUT:   %.loc16_11.2 = load i32, ptr %.loc16_11.1.d, align 4, !dbg !29
-// CHECK:STDOUT:   ret i32 %.loc16_11.2, !dbg !30
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #3
-// CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_ZN1AC2Ev(ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #4
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_ZN1BC2Ev(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef) unnamed_addr #4
@@ -168,10 +168,10 @@ fn AccessD(d: Cpp.D) -> i32 {
 // CHECK:STDOUT: uselistorder ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr], [3 x ptr] }, ptr @_ZTV1D, i32 0, i32 1, i32 3), { 1, 0 }
 // CHECK:STDOUT: uselistorder ptr @_ZTI1D, { 1, 0 }
 // CHECK:STDOUT:
-// CHECK:STDOUT: attributes #0 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #1 = { inlinehint mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-// CHECK:STDOUT: attributes #2 = { nounwind }
-// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #0 = { nounwind }
+// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+// CHECK:STDOUT: attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+// CHECK:STDOUT: attributes #3 = { inlinehint mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT: attributes #4 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
 // CHECK:STDOUT:
 // CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
@@ -189,23 +189,23 @@ fn AccessD(d: Cpp.D) -> i32 {
 // CHECK:STDOUT: !8 = !{!"int", !9, i64 0}
 // CHECK:STDOUT: !9 = !{!"omnipotent char", !10, i64 0}
 // CHECK:STDOUT: !10 = !{!"Simple C++ TBAA"}
-// CHECK:STDOUT: !11 = !{!12, !12, i64 0}
-// CHECK:STDOUT: !12 = !{!"p1 _ZTS1D", !13, i64 0}
-// CHECK:STDOUT: !13 = !{!"any pointer", !9, i64 0}
-// CHECK:STDOUT: !14 = !{!15, !15, i64 0}
-// CHECK:STDOUT: !15 = !{!"vtable pointer", !10, i64 0}
-// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "Make", linkageName: "_CMake.Main", scope: null, file: !6, line: 6, type: !17, spFlags: DISPFlagDefinition, unit: !5)
-// CHECK:STDOUT: !17 = !DISubroutineType(types: !18)
-// CHECK:STDOUT: !18 = !{null}
-// CHECK:STDOUT: !19 = !DILocation(line: 11, column: 3, scope: !16)
-// CHECK:STDOUT: !20 = !DILocation(line: 11, column: 18, scope: !16)
-// CHECK:STDOUT: !21 = !DILocation(line: 6, column: 1, scope: !16)
-// CHECK:STDOUT: !22 = distinct !DISubprogram(name: "AccessD", linkageName: "_CAccessD.Main", scope: null, file: !6, line: 14, type: !23, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !27)
-// CHECK:STDOUT: !23 = !DISubroutineType(types: !24)
-// CHECK:STDOUT: !24 = !{!25, !26}
-// CHECK:STDOUT: !25 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !26 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !27 = !{!28}
-// CHECK:STDOUT: !28 = !DILocalVariable(arg: 1, scope: !22, type: !26)
-// CHECK:STDOUT: !29 = !DILocation(line: 16, column: 10, scope: !22)
-// CHECK:STDOUT: !30 = !DILocation(line: 16, column: 3, scope: !22)
+// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Make", linkageName: "_CMake.Main", scope: null, file: !6, line: 6, type: !12, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !13 = !{null}
+// CHECK:STDOUT: !14 = !DILocation(line: 11, column: 3, scope: !11)
+// CHECK:STDOUT: !15 = !DILocation(line: 11, column: 18, scope: !11)
+// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 1, scope: !11)
+// CHECK:STDOUT: !17 = !{!18, !18, i64 0}
+// CHECK:STDOUT: !18 = !{!"p1 _ZTS1D", !19, i64 0}
+// CHECK:STDOUT: !19 = !{!"any pointer", !9, i64 0}
+// CHECK:STDOUT: !20 = distinct !DISubprogram(name: "AccessD", linkageName: "_CAccessD.Main", scope: null, file: !6, line: 14, type: !21, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !25)
+// CHECK:STDOUT: !21 = !DISubroutineType(types: !22)
+// CHECK:STDOUT: !22 = !{!23, !24}
+// CHECK:STDOUT: !23 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !24 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !25 = !{!26}
+// CHECK:STDOUT: !26 = !DILocalVariable(arg: 1, scope: !20, type: !24)
+// CHECK:STDOUT: !27 = !DILocation(line: 16, column: 10, scope: !20)
+// CHECK:STDOUT: !28 = !DILocation(line: 16, column: 3, scope: !20)
+// CHECK:STDOUT: !29 = !{!30, !30, i64 0}
+// CHECK:STDOUT: !30 = !{!"vtable pointer", !10, i64 0}