carbon-lang/toolchain/check/testdata/function/definition/import.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
// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/function/definition/import.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/definition/import.carbon

// ============================================================================
// Setup files
// ============================================================================

// --- fns.carbon

library "[[@TEST_NAME]]";

fn A() {}
fn B(b: i32) -> i32 { return b; }
fn C(c: (i32,)) -> {.c: i32} { return {.c = c.0}; }
fn D();

// --- extern.carbon

library "[[@TEST_NAME]]";

extern fn A();

// ============================================================================
// Test files
// ============================================================================

// --- basics.carbon

library "[[@TEST_NAME]]";

import library "fns";

var a: () = A();
var b: i32 = B(1);
var c: {.c: i32} = C((1,));

// --- fail_def_ownership.carbon

library "[[@TEST_NAME]]";

import library "fns";

// CHECK:STDERR: fail_def_ownership.carbon:[[@LINE+8]]:1: error: redeclaration of `fn A` is redundant [RedeclRedundant]
// CHECK:STDERR: fn A() {};
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR: fail_def_ownership.carbon:[[@LINE-5]]:1: in import [InImport]
// CHECK:STDERR: fns.carbon:4:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: fn A() {}
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
fn A() {};
// CHECK:STDERR: fail_def_ownership.carbon:[[@LINE+8]]:1: error: redeclaration of `fn B` is redundant [RedeclRedundant]
// CHECK:STDERR: fn B(b: i32) -> i32;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_def_ownership.carbon:[[@LINE-14]]:1: in import [InImport]
// CHECK:STDERR: fns.carbon:5:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: fn B(b: i32) -> i32 { return b; }
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
fn B(b: i32) -> i32;

// --- fail_redecl_then_def.carbon

library "[[@TEST_NAME]]";

import library "extern";

// CHECK:STDERR: fail_redecl_then_def.carbon:[[@LINE+8]]:1: error: redeclarations of `fn A` must match use of `extern` [RedeclExternMismatch]
// CHECK:STDERR: fn A();
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR: fail_redecl_then_def.carbon:[[@LINE-5]]:1: in import [InImport]
// CHECK:STDERR: extern.carbon:4:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: extern fn A();
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR:
fn A();

// CHECK:STDERR: fail_redecl_then_def.carbon:[[@LINE+8]]:1: error: redeclarations of `fn A` must match use of `extern` [RedeclExternMismatch]
// CHECK:STDERR: fn A() {}
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR: fail_redecl_then_def.carbon:[[@LINE-15]]:1: in import [InImport]
// CHECK:STDERR: extern.carbon:4:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: extern fn A();
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR:
fn A() {}

// --- fail_mix_extern_decl.carbon

library "[[@TEST_NAME]]";

import library "fns";

// CHECK:STDERR: fail_mix_extern_decl.carbon:[[@LINE+8]]:1: error: redeclarations of `fn D` must match use of `extern` [RedeclExternMismatch]
// CHECK:STDERR: extern fn D();
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR: fail_mix_extern_decl.carbon:[[@LINE-5]]:1: in import [InImport]
// CHECK:STDERR: fns.carbon:7:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: fn D();
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
extern fn D();

fn D() {}

// CHECK:STDOUT: --- fns.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %A.type: type = fn_type @A [concrete]
// CHECK:STDOUT:   %A: %A.type = struct_value () [concrete]
// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
// CHECK:STDOUT:   %N: Core.IntLiteral = bind_symbolic_name N, 0 [symbolic]
// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT:   %pattern_type.7ce: type = pattern_type %i32 [concrete]
// CHECK:STDOUT:   %B.type: type = fn_type @B [concrete]
// CHECK:STDOUT:   %B: %B.type = struct_value () [concrete]
// CHECK:STDOUT:   %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT:   %Copy.Op.type: type = fn_type @Copy.Op [concrete]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.type.afd: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%N) [symbolic]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.6cd: %Int.as.Copy.impl.Op.type.afd = struct_value () [symbolic]
// CHECK:STDOUT:   %Copy.impl_witness.a32: <witness> = impl_witness imports.%Copy.impl_witness_table.1ed, @Int.as.Copy.impl(%int_32) [concrete]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.type.276: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%int_32) [concrete]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.f59: %Int.as.Copy.impl.Op.type.276 = struct_value () [concrete]
// CHECK:STDOUT:   %Copy.facet: %Copy.type = facet_value %i32, (%Copy.impl_witness.a32) [concrete]
// CHECK:STDOUT:   %.7fa: type = fn_type_with_self_type %Copy.Op.type, %Copy.facet [concrete]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %Int.as.Copy.impl.Op.f59, @Int.as.Copy.impl.Op(%int_32) [concrete]
// CHECK:STDOUT:   %tuple.type.85c: type = tuple_type (type) [concrete]
// CHECK:STDOUT:   %tuple.type.a1c: type = tuple_type (%i32) [concrete]
// CHECK:STDOUT:   %pattern_type.b74: type = pattern_type %tuple.type.a1c [concrete]
// CHECK:STDOUT:   %struct_type.c: type = struct_type {.c: %i32} [concrete]
// CHECK:STDOUT:   %pattern_type.688: type = pattern_type %struct_type.c [concrete]
// CHECK:STDOUT:   %C.type: type = fn_type @C [concrete]
// CHECK:STDOUT:   %C: %C.type = struct_value () [concrete]
// CHECK:STDOUT:   %int_0: Core.IntLiteral = int_value 0 [concrete]
// CHECK:STDOUT:   %D.type: type = fn_type @D [concrete]
// CHECK:STDOUT:   %D: %D.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     .Int = %Core.Int
// CHECK:STDOUT:     .Copy = %Core.Copy
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT:   %Core.Copy: type = import_ref Core//prelude/parts/copy, Copy, loaded [concrete = constants.%Copy.type]
// CHECK:STDOUT:   %Core.import_ref.d0f6: @Int.as.Copy.impl.%Int.as.Copy.impl.Op.type (%Int.as.Copy.impl.Op.type.afd) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Int.as.Copy.impl.%Int.as.Copy.impl.Op (constants.%Int.as.Copy.impl.Op.6cd)]
// CHECK:STDOUT:   %Copy.impl_witness_table.1ed = impl_witness_table (%Core.import_ref.d0f6), @Int.as.Copy.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .A = %A.decl
// CHECK:STDOUT:     .B = %B.decl
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .D = %D.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %A.decl: %A.type = fn_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT:   %B.decl: %B.type = fn_decl @B [concrete = constants.%B] {
// CHECK:STDOUT:     %b.patt: %pattern_type.7ce = binding_pattern b [concrete]
// CHECK:STDOUT:     %b.param_patt: %pattern_type.7ce = value_param_pattern %b.patt, call_param0 [concrete]
// CHECK:STDOUT:     %return.patt: %pattern_type.7ce = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type.7ce = out_param_pattern %return.patt, call_param1 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %int_32.loc5_17: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:     %i32.loc5_17: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     %b.param: %i32 = value_param call_param0
// CHECK:STDOUT:     %.loc5: type = splice_block %i32.loc5_9 [concrete = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc5_9: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:       %i32.loc5_9: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %b: %i32 = bind_name b, %b.param
// CHECK:STDOUT:     %return.param: ref %i32 = out_param call_param1
// CHECK:STDOUT:     %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: %C.type = fn_decl @C [concrete = constants.%C] {
// CHECK:STDOUT:     %c.patt: %pattern_type.b74 = binding_pattern c [concrete]
// CHECK:STDOUT:     %c.param_patt: %pattern_type.b74 = value_param_pattern %c.patt, call_param0 [concrete]
// CHECK:STDOUT:     %return.patt: %pattern_type.688 = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type.688 = out_param_pattern %return.patt, call_param1 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %int_32.loc6_25: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:     %i32.loc6_25: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     %struct_type.c: type = struct_type {.c: %i32} [concrete = constants.%struct_type.c]
// CHECK:STDOUT:     %c.param: %tuple.type.a1c = value_param call_param0
// CHECK:STDOUT:     %.loc6_14.1: type = splice_block %.loc6_14.3 [concrete = constants.%tuple.type.a1c] {
// CHECK:STDOUT:       %int_32.loc6_10: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:       %i32.loc6_10: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:       %.loc6_14.2: %tuple.type.85c = tuple_literal (%i32.loc6_10)
// CHECK:STDOUT:       %.loc6_14.3: type = converted %.loc6_14.2, constants.%tuple.type.a1c [concrete = constants.%tuple.type.a1c]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %c: %tuple.type.a1c = bind_name c, %c.param
// CHECK:STDOUT:     %return.param: ref %struct_type.c = out_param call_param1
// CHECK:STDOUT:     %return: ref %struct_type.c = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %D.decl: %D.type = fn_decl @D [concrete = constants.%D] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @B(%b.param: %i32) -> %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %b.ref: %i32 = name_ref b, %b
// CHECK:STDOUT:   %impl.elem0: %.7fa = impl_witness_access constants.%Copy.impl_witness.a32, element0 [concrete = constants.%Int.as.Copy.impl.Op.f59]
// CHECK:STDOUT:   %bound_method.loc5_30.1: <bound method> = bound_method %b.ref, %impl.elem0
// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Int.as.Copy.impl.Op(constants.%int_32) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT:   %bound_method.loc5_30.2: <bound method> = bound_method %b.ref, %specific_fn
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.call: init %i32 = call %bound_method.loc5_30.2(%b.ref)
// CHECK:STDOUT:   return %Int.as.Copy.impl.Op.call to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C(%c.param: %tuple.type.a1c) -> %struct_type.c {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %c.ref: %tuple.type.a1c = name_ref c, %c
// CHECK:STDOUT:   %int_0: Core.IntLiteral = int_value 0 [concrete = constants.%int_0]
// CHECK:STDOUT:   %tuple.elem0: %i32 = tuple_access %c.ref, element0
// CHECK:STDOUT:   %.loc6_48.1: %struct_type.c = struct_literal (%tuple.elem0)
// CHECK:STDOUT:   %impl.elem0: %.7fa = impl_witness_access constants.%Copy.impl_witness.a32, element0 [concrete = constants.%Int.as.Copy.impl.Op.f59]
// CHECK:STDOUT:   %bound_method.loc6_46.1: <bound method> = bound_method %tuple.elem0, %impl.elem0
// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Int.as.Copy.impl.Op(constants.%int_32) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT:   %bound_method.loc6_46.2: <bound method> = bound_method %tuple.elem0, %specific_fn
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.call: init %i32 = call %bound_method.loc6_46.2(%tuple.elem0)
// CHECK:STDOUT:   %.loc6_48.2: init %struct_type.c = struct_init (%Int.as.Copy.impl.Op.call) to %return
// CHECK:STDOUT:   %.loc6_49: init %struct_type.c = converted %.loc6_48.1, %.loc6_48.2
// CHECK:STDOUT:   return %.loc6_49 to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @D();
// CHECK:STDOUT:
// CHECK:STDOUT: --- extern.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %A.type: type = fn_type @A [concrete]
// CHECK:STDOUT:   %A: %A.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .A = %A.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %A.decl: %A.type = fn_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: extern fn @A();
// CHECK:STDOUT:
// CHECK:STDOUT: --- basics.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %pattern_type.cb1: type = pattern_type %empty_tuple.type [concrete]
// CHECK:STDOUT:   %A.type: type = fn_type @A [concrete]
// CHECK:STDOUT:   %A: %A.type = struct_value () [concrete]
// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT:   %pattern_type.7ce: type = pattern_type %i32 [concrete]
// CHECK:STDOUT:   %B.type: type = fn_type @B [concrete]
// CHECK:STDOUT:   %B: %B.type = struct_value () [concrete]
// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.type.d14: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
// CHECK:STDOUT:   %ImplicitAs.Convert.type.1b6: type = fn_type @ImplicitAs.Convert, @ImplicitAs(%i32) [concrete]
// CHECK:STDOUT:   %To: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.340: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%To) [symbolic]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.1c0: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.340 = struct_value () [symbolic]
// CHECK:STDOUT:   %ImplicitAs.impl_witness.204: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.9e9, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.584: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.0f0: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.584 = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.d14 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.204) [concrete]
// CHECK:STDOUT:   %.1df: type = fn_type_with_self_type %ImplicitAs.Convert.type.1b6, %ImplicitAs.facet [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.0f0 [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn: <specific function> = specific_function %Core.IntLiteral.as.ImplicitAs.impl.Convert.0f0, @Core.IntLiteral.as.ImplicitAs.impl.Convert(%int_32) [concrete]
// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT:   %int_1.5d2: %i32 = int_value 1 [concrete]
// CHECK:STDOUT:   %struct_type.c: type = struct_type {.c: %i32} [concrete]
// CHECK:STDOUT:   %pattern_type.688: type = pattern_type %struct_type.c [concrete]
// CHECK:STDOUT:   %C.type: type = fn_type @C [concrete]
// CHECK:STDOUT:   %C: %C.type = struct_value () [concrete]
// CHECK:STDOUT:   %tuple.type.a1c: type = tuple_type (%i32) [concrete]
// CHECK:STDOUT:   %tuple.type.985: type = tuple_type (Core.IntLiteral) [concrete]
// CHECK:STDOUT:   %tuple: %tuple.type.a1c = tuple_value (%int_1.5d2) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Main.A: %A.type = import_ref Main//fns, A, loaded [concrete = constants.%A]
// CHECK:STDOUT:   %Main.B: %B.type = import_ref Main//fns, B, loaded [concrete = constants.%B]
// CHECK:STDOUT:   %Main.C: %C.type = import_ref Main//fns, C, loaded [concrete = constants.%C]
// CHECK:STDOUT:   %Main.D = import_ref Main//fns, D, unloaded
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     .Int = %Core.Int
// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/parts/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
// CHECK:STDOUT:   %Core.import_ref.ee7: @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.340) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert (constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.1c0)]
// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.9e9 = impl_witness_table (%Core.import_ref.ee7), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .A = imports.%Main.A
// CHECK:STDOUT:     .B = imports.%Main.B
// CHECK:STDOUT:     .C = imports.%Main.C
// CHECK:STDOUT:     .D = imports.%Main.D
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .a = %a
// CHECK:STDOUT:     .b = %b
// CHECK:STDOUT:     .c = %c
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %default.import = import <none>
// CHECK:STDOUT:   name_binding_decl {
// CHECK:STDOUT:     %a.patt: %pattern_type.cb1 = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.var_patt: %pattern_type.cb1 = var_pattern %a.patt [concrete]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %a.var: ref %empty_tuple.type = var %a.var_patt [concrete]
// CHECK:STDOUT:   %.loc6_9.1: type = splice_block %.loc6_9.3 [concrete = constants.%empty_tuple.type] {
// CHECK:STDOUT:     %.loc6_9.2: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT:     %.loc6_9.3: type = converted %.loc6_9.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %a: ref %empty_tuple.type = bind_name a, %a.var [concrete = %a.var]
// CHECK:STDOUT:   name_binding_decl {
// CHECK:STDOUT:     %b.patt: %pattern_type.7ce = binding_pattern b [concrete]
// CHECK:STDOUT:     %b.var_patt: %pattern_type.7ce = var_pattern %b.patt [concrete]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %b.var: ref %i32 = var %b.var_patt [concrete]
// CHECK:STDOUT:   %.loc7: type = splice_block %i32.loc7 [concrete = constants.%i32] {
// CHECK:STDOUT:     %int_32.loc7: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:     %i32.loc7: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %b: ref %i32 = bind_name b, %b.var [concrete = %b.var]
// CHECK:STDOUT:   name_binding_decl {
// CHECK:STDOUT:     %c.patt: %pattern_type.688 = binding_pattern c [concrete]
// CHECK:STDOUT:     %c.var_patt: %pattern_type.688 = var_pattern %c.patt [concrete]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %c.var: ref %struct_type.c = var %c.var_patt [concrete]
// CHECK:STDOUT:   %.loc8: type = splice_block %struct_type.c [concrete = constants.%struct_type.c] {
// CHECK:STDOUT:     %int_32.loc8: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:     %i32.loc8: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     %struct_type.c: type = struct_type {.c: %i32} [concrete = constants.%struct_type.c]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %c: ref %struct_type.c = bind_name c, %c.var [concrete = %c.var]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A [from "fns.carbon"];
// CHECK:STDOUT:
// CHECK:STDOUT: fn @B [from "fns.carbon"];
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C [from "fns.carbon"];
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %A.ref: %A.type = name_ref A, imports.%Main.A [concrete = constants.%A]
// CHECK:STDOUT:   %A.call: init %empty_tuple.type = call %A.ref()
// CHECK:STDOUT:   assign file.%a.var, %A.call
// CHECK:STDOUT:   %B.ref: %B.type = name_ref B, imports.%Main.B [concrete = constants.%B]
// CHECK:STDOUT:   %int_1.loc7: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT:   %impl.elem0.loc7: %.1df = impl_witness_access constants.%ImplicitAs.impl_witness.204, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0f0]
// CHECK:STDOUT:   %bound_method.loc7_16.1: <bound method> = bound_method %int_1.loc7, %impl.elem0.loc7 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound]
// CHECK:STDOUT:   %specific_fn.loc7: <specific function> = specific_function %impl.elem0.loc7, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc7_16.2: <bound method> = bound_method %int_1.loc7, %specific_fn.loc7 [concrete = constants.%bound_method]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc7: init %i32 = call %bound_method.loc7_16.2(%int_1.loc7) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc7_16.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc7 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc7_16.2: %i32 = converted %int_1.loc7, %.loc7_16.1 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %B.call: init %i32 = call %B.ref(%.loc7_16.2)
// CHECK:STDOUT:   assign file.%b.var, %B.call
// CHECK:STDOUT:   %C.ref: %C.type = name_ref C, imports.%Main.C [concrete = constants.%C]
// CHECK:STDOUT:   %int_1.loc8: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT:   %.loc8_25.1: %tuple.type.985 = tuple_literal (%int_1.loc8)
// CHECK:STDOUT:   %impl.elem0.loc8: %.1df = impl_witness_access constants.%ImplicitAs.impl_witness.204, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0f0]
// CHECK:STDOUT:   %bound_method.loc8_25.1: <bound method> = bound_method %int_1.loc8, %impl.elem0.loc8 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound]
// CHECK:STDOUT:   %specific_fn.loc8: <specific function> = specific_function %impl.elem0.loc8, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc8_25.2: <bound method> = bound_method %int_1.loc8, %specific_fn.loc8 [concrete = constants.%bound_method]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc8: init %i32 = call %bound_method.loc8_25.2(%int_1.loc8) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc8_25.2: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc8 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc8_25.3: %i32 = converted %int_1.loc8, %.loc8_25.2 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %tuple: %tuple.type.a1c = tuple_value (%.loc8_25.3) [concrete = constants.%tuple]
// CHECK:STDOUT:   %.loc8_25.4: %tuple.type.a1c = converted %.loc8_25.1, %tuple [concrete = constants.%tuple]
// CHECK:STDOUT:   %C.call: init %struct_type.c = call %C.ref(%.loc8_25.4)
// CHECK:STDOUT:   assign file.%c.var, %C.call
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_def_ownership.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %A.type.00d7e7.1: type = fn_type @A.1 [concrete]
// CHECK:STDOUT:   %A.1db889.1: %A.type.00d7e7.1 = struct_value () [concrete]
// CHECK:STDOUT:   %A.type.00d7e7.2: type = fn_type @A.loc14 [concrete]
// CHECK:STDOUT:   %A.1db889.2: %A.type.00d7e7.2 = struct_value () [concrete]
// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT:   %B.type: type = fn_type @B [concrete]
// CHECK:STDOUT:   %B: %B.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Main.A: %A.type.00d7e7.1 = import_ref Main//fns, A, loaded [concrete = constants.%A.1db889.1]
// CHECK:STDOUT:   %Main.C = import_ref Main//fns, C, unloaded
// CHECK:STDOUT:   %Main.D = import_ref Main//fns, D, unloaded
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     .Int = %Core.Int
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .A = imports.%Main.A
// CHECK:STDOUT:     .B = %B.decl
// CHECK:STDOUT:     .C = imports.%Main.C
// CHECK:STDOUT:     .D = imports.%Main.D
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %default.import = import <none>
// CHECK:STDOUT:   %A.decl: %A.type.00d7e7.2 = fn_decl @A.loc14 [concrete = constants.%A.1db889.2] {} {}
// CHECK:STDOUT:   %B.decl: %B.type = fn_decl @B [concrete = constants.%B] {} {
// CHECK:STDOUT:     %int_32.loc23_17: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:     %i32.loc23_17: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     %b.param: %i32 = value_param call_param0
// CHECK:STDOUT:     %.loc23: type = splice_block %i32.loc23_9 [concrete = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc23_9: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:       %i32.loc23_9: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %b: %i32 = bind_name b, %b.param
// CHECK:STDOUT:     %return.param: ref %i32 = out_param call_param1
// CHECK:STDOUT:     %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A.1 [from "fns.carbon"];
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A.loc14() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @B [from "fns.carbon"];
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_redecl_then_def.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %A.type: type = fn_type @A [concrete]
// CHECK:STDOUT:   %A: %A.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .A = %A.decl.loc14
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %default.import = import <none>
// CHECK:STDOUT:   %A.decl.loc14: %A.type = fn_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT:   %A.decl.loc24: %A.type = fn_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: extern fn @A() [from "extern.carbon"] {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_mix_extern_decl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %D.type: type = fn_type @D [concrete]
// CHECK:STDOUT:   %D: %D.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Main.A = import_ref Main//fns, A, unloaded
// CHECK:STDOUT:   %Main.B = import_ref Main//fns, B, unloaded
// CHECK:STDOUT:   %Main.C = import_ref Main//fns, C, unloaded
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .A = imports.%Main.A
// CHECK:STDOUT:     .B = imports.%Main.B
// CHECK:STDOUT:     .C = imports.%Main.C
// CHECK:STDOUT:     .D = %D.decl.loc14
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %default.import = import <none>
// CHECK:STDOUT:   %D.decl.loc14: %D.type = fn_decl @D [concrete = constants.%D] {} {}
// CHECK:STDOUT:   %D.decl.loc16: %D.type = fn_decl @D [concrete = constants.%D] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @D() [from "fns.carbon"] {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT: