carbon-lang/toolchain/lower/testdata/interop/cpp/constructor.carbon

// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/interop/cpp/constructor.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/interop/cpp/constructor.carbon

// ============================================================================
// Default constructor
// ============================================================================

// --- default.h

class C {
 public:
  C() : x_(8), y_(9) {}

 private:
  int x_;
  int y_;
};

// --- import_default.carbon

library "[[@TEST_NAME]]";

import Cpp library "default.h";

fn F() {
  let _: Cpp.C = Cpp.C.C();
}

// ============================================================================
// Copy constructor
// ============================================================================

// --- copy.h

class Copy {
 public:
  Copy();
  Copy(const Copy&);

 private:
  int n;
};

// --- call_copy.carbon

library "[[@TEST_NAME]]";

import Cpp library "copy.h";

fn Copy(c: Cpp.Copy) -> Cpp.Copy {
  return c;
}

// ============================================================================
// C1 constructor
// ============================================================================

// --- header.h

struct Base { };
struct Derived: virtual Base {
};

// --- call_c1_in_thunk.carbon

library "[[@TEST_NAME]]";

import Cpp library "header.h";

fn F() {
  let _: Cpp.Derived = Cpp.Derived.Derived();
}

// CHECK:STDOUT: ; ModuleID = 'import_default.carbon'
// CHECK:STDOUT: source_filename = "import_default.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"
// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
// CHECK:STDOUT:
// CHECK:STDOUT: %class.C = type { i32, i32 }
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN1CC2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define dso_local void @_ZN1CC1Ev.carbon_thunk(ptr noundef %return) #0 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !12
// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !12
// CHECK:STDOUT:   call void @_ZN1CC2Ev(ptr noundef nonnull align 4 dereferenceable(8) %0)
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN1CC2Ev(ptr noundef nonnull align 4 dereferenceable(8) %this) unnamed_addr #1 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 !12
// CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT:   %x_ = getelementptr inbounds nuw %class.C, ptr %this1, i32 0, i32 0
// CHECK:STDOUT:   store i32 8, ptr %x_, align 4, !tbaa !15
// CHECK:STDOUT:   %y_ = getelementptr inbounds nuw %class.C, ptr %this1, i32 0, i32 1
// CHECK:STDOUT:   store i32 9, ptr %y_, align 4, !tbaa !17
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF.Main() #2 !dbg !18 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %.loc7_26.1.temp = alloca [8 x i8], align 1, !dbg !21
// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_26.1.temp), !dbg !21
// CHECK:STDOUT:   call void @_ZN1CC1Ev.carbon_thunk(ptr %.loc7_26.1.temp), !dbg !21
// CHECK:STDOUT:   ret void, !dbg !22
// 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: 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 #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4, !5}
// CHECK:STDOUT: !llvm.dbg.cu = !{!6}
// CHECK:STDOUT: !llvm.errno.tbaa = !{!8}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = !{i32 1, !"wchar_size", i32 4}
// CHECK:STDOUT: !3 = !{i32 8, !"PIC Level", i32 2}
// CHECK:STDOUT: !4 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !5 = !{i32 7, !"uwtable", i32 2}
// CHECK:STDOUT: !6 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !7, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !7 = !DIFile(filename: "import_default.carbon", directory: "")
// CHECK:STDOUT: !8 = !{!9, !9, i64 0}
// CHECK:STDOUT: !9 = !{!"int", !10, i64 0}
// CHECK:STDOUT: !10 = !{!"omnipotent char", !11, i64 0}
// CHECK:STDOUT: !11 = !{!"Simple C++ TBAA"}
// CHECK:STDOUT: !12 = !{!13, !13, i64 0}
// CHECK:STDOUT: !13 = !{!"p1 _ZTS1C", !14, i64 0}
// CHECK:STDOUT: !14 = !{!"any pointer", !10, i64 0}
// CHECK:STDOUT: !15 = !{!16, !9, i64 0}
// CHECK:STDOUT: !16 = !{!"_ZTS1C", !9, i64 0, !9, i64 4}
// CHECK:STDOUT: !17 = !{!16, !9, i64 4}
// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !7, line: 6, type: !19, spFlags: DISPFlagDefinition, unit: !6)
// CHECK:STDOUT: !19 = !DISubroutineType(types: !20)
// CHECK:STDOUT: !20 = !{null}
// CHECK:STDOUT: !21 = !DILocation(line: 7, column: 18, scope: !18)
// CHECK:STDOUT: !22 = !DILocation(line: 6, column: 1, scope: !18)
// CHECK:STDOUT: ; ModuleID = 'call_copy.carbon'
// CHECK:STDOUT: source_filename = "call_copy.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"
// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define dso_local void @_ZN4CopyC1ERKS_.carbon_thunk(ptr noundef %0, ptr noundef %return) #0 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %.addr = alloca ptr, align 8
// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !12
// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !12
// CHECK:STDOUT:   %1 = load ptr, ptr %return.addr, align 8, !tbaa !12
// CHECK:STDOUT:   %2 = load ptr, ptr %.addr, align 8, !tbaa !12
// CHECK:STDOUT:   call void @_ZN4CopyC1ERKS_(ptr noundef nonnull align 4 dereferenceable(4) %1, ptr noundef nonnull align 4 dereferenceable(4) %2)
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_ZN4CopyC1ERKS_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CCopy.Main(ptr sret([4 x i8]) %return, ptr %c) #2 !dbg !15 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %.loc7_10.1.temp = alloca [4 x i8], align 1, !dbg !21
// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_10.1.temp), !dbg !21
// CHECK:STDOUT:   call void @_ZN4CopyC1ERKS_.carbon_thunk(ptr %c, ptr %return), !dbg !21
// CHECK:STDOUT:   ret void, !dbg !22
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define void @"_COp:thunk.Copy.Cpp"(ptr sret([4 x i8]) %return, ptr %self) #3 !dbg !23 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   call void @_ZN4CopyC1ERKS_.carbon_thunk(ptr %self, ptr %return), !dbg !27
// CHECK:STDOUT:   ret void, !dbg !27
// 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: 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 = { alwaysinline nounwind }
// CHECK:STDOUT: attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4, !5}
// CHECK:STDOUT: !llvm.dbg.cu = !{!6}
// CHECK:STDOUT: !llvm.errno.tbaa = !{!8}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = !{i32 1, !"wchar_size", i32 4}
// CHECK:STDOUT: !3 = !{i32 8, !"PIC Level", i32 2}
// CHECK:STDOUT: !4 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !5 = !{i32 7, !"uwtable", i32 2}
// CHECK:STDOUT: !6 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !7, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !7 = !DIFile(filename: "call_copy.carbon", directory: "")
// CHECK:STDOUT: !8 = !{!9, !9, i64 0}
// CHECK:STDOUT: !9 = !{!"int", !10, i64 0}
// CHECK:STDOUT: !10 = !{!"omnipotent char", !11, i64 0}
// CHECK:STDOUT: !11 = !{!"Simple C++ TBAA"}
// CHECK:STDOUT: !12 = !{!13, !13, i64 0}
// CHECK:STDOUT: !13 = !{!"p1 _ZTS4Copy", !14, i64 0}
// CHECK:STDOUT: !14 = !{!"any pointer", !10, i64 0}
// CHECK:STDOUT: !15 = distinct !DISubprogram(name: "Copy", linkageName: "_CCopy.Main", scope: null, file: !7, line: 6, type: !16, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !19)
// CHECK:STDOUT: !16 = !DISubroutineType(types: !17)
// CHECK:STDOUT: !17 = !{!18, !18}
// CHECK:STDOUT: !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !19 = !{!20}
// CHECK:STDOUT: !20 = !DILocalVariable(arg: 1, scope: !15, type: !18)
// CHECK:STDOUT: !21 = !DILocation(line: 7, column: 10, scope: !15)
// CHECK:STDOUT: !22 = !DILocation(line: 7, column: 3, scope: !15)
// CHECK:STDOUT: !23 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk.Copy.Cpp", scope: null, file: !24, line: 5, type: !16, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !25)
// CHECK:STDOUT: !24 = !DIFile(filename: "./copy.h", directory: "")
// CHECK:STDOUT: !25 = !{!26}
// CHECK:STDOUT: !26 = !DILocalVariable(arg: 1, scope: !23, type: !18)
// CHECK:STDOUT: !27 = !DILocation(line: 5, column: 3, scope: !23)
// CHECK:STDOUT: ; ModuleID = 'call_c1_in_thunk.carbon'
// CHECK:STDOUT: source_filename = "call_c1_in_thunk.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"
// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN7DerivedC1Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTV7Derived = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTT7Derived = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTI7Derived = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTS7Derived = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTI4Base = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTS4Base = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: @_ZTV7Derived = linkonce_odr dso_local unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr null, ptr @_ZTI7Derived] }, comdat, align 8
// CHECK:STDOUT: @_ZTT7Derived = linkonce_odr dso_local unnamed_addr constant [1 x ptr] [ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr] }, ptr @_ZTV7Derived, i32 0, i32 0, i32 3)], comdat, align 8
// CHECK:STDOUT: @_ZTI7Derived = linkonce_odr dso_local constant { ptr, ptr, i32, i32, ptr, i64 } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv121__vmi_class_type_infoE, i64 2), ptr @_ZTS7Derived, i32 0, i32 1, ptr @_ZTI4Base, i64 -6141 }, comdat, align 8
// CHECK:STDOUT: @_ZTVN10__cxxabiv121__vmi_class_type_infoE = external global [0 x ptr]
// CHECK:STDOUT: @_ZTS7Derived = linkonce_odr dso_local constant [9 x i8] c"7Derived\00", comdat, align 1
// CHECK:STDOUT: @_ZTI4Base = linkonce_odr dso_local constant { ptr, ptr } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv117__class_type_infoE, i64 2), ptr @_ZTS4Base }, comdat, align 8
// CHECK:STDOUT: @_ZTVN10__cxxabiv117__class_type_infoE = external global [0 x ptr]
// CHECK:STDOUT: @_ZTS4Base = linkonce_odr dso_local constant [6 x i8] c"4Base\00", comdat, align 1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
// CHECK:STDOUT: define dso_local void @_ZN7DerivedC1Ev.carbon_thunk(ptr noundef %return) #0 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !12
// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !12
// CHECK:STDOUT:   call void @_ZN7DerivedC1Ev(ptr noundef nonnull align 8 dereferenceable(8) %0) #2
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN7DerivedC1Ev(ptr noundef nonnull align 8 dereferenceable(8) %this) unnamed_addr #1 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 !12
// CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT:   store ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr] }, ptr @_ZTV7Derived, i32 0, i32 0, i32 3), ptr %this1, align 8, !tbaa !15
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF.Main() #2 !dbg !17 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %.loc7_44.1.temp = alloca [8 x i8], align 1, !dbg !20
// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_44.1.temp), !dbg !20
// CHECK:STDOUT:   call void @_ZN7DerivedC1Ev.carbon_thunk(ptr %.loc7_44.1.temp), !dbg !20
// CHECK:STDOUT:   ret void, !dbg !21
// 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: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr getelementptr inbounds inrange(-24, 0) ({ [3 x ptr] }, ptr @_ZTV7Derived, i32 0, i32 0, i32 3), { 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 = { inlinehint 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 #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4, !5}
// CHECK:STDOUT: !llvm.dbg.cu = !{!6}
// CHECK:STDOUT: !llvm.errno.tbaa = !{!8}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = !{i32 1, !"wchar_size", i32 4}
// CHECK:STDOUT: !3 = !{i32 8, !"PIC Level", i32 2}
// CHECK:STDOUT: !4 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !5 = !{i32 7, !"uwtable", i32 2}
// CHECK:STDOUT: !6 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !7, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !7 = !DIFile(filename: "call_c1_in_thunk.carbon", directory: "")
// CHECK:STDOUT: !8 = !{!9, !9, i64 0}
// CHECK:STDOUT: !9 = !{!"int", !10, i64 0}
// CHECK:STDOUT: !10 = !{!"omnipotent char", !11, i64 0}
// CHECK:STDOUT: !11 = !{!"Simple C++ TBAA"}
// CHECK:STDOUT: !12 = !{!13, !13, i64 0}
// CHECK:STDOUT: !13 = !{!"p1 _ZTS7Derived", !14, i64 0}
// CHECK:STDOUT: !14 = !{!"any pointer", !10, i64 0}
// CHECK:STDOUT: !15 = !{!16, !16, i64 0}
// CHECK:STDOUT: !16 = !{!"vtable pointer", !11, i64 0}
// CHECK:STDOUT: !17 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !7, line: 6, type: !18, spFlags: DISPFlagDefinition, unit: !6)
// CHECK:STDOUT: !18 = !DISubroutineType(types: !19)
// CHECK:STDOUT: !19 = !{null}
// CHECK:STDOUT: !20 = !DILocation(line: 7, column: 24, scope: !17)
// CHECK:STDOUT: !21 = !DILocation(line: 6, column: 1, scope: !17)