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carbon-lang/toolchain/lower/testdata/interop/cpp/field.carbon
T
David Blaikie 773b7136ef Use a single llvm::Module for C++ interop and Carbon IRGen (#6595) 
Some module metadata changed - because rather than linking one module
with one module metadata value (eg: PIC Level 0, or unspecified) and one
module with a different one (PIC level 2, in clang) - we use Clang's
Module as-is, no merging required, so Clang's module metadata sticks
rather than being merged with default values from Carbon.

Also tweaked the name we use for Clang's module name so it matches the
carbon file name.

Otherwise the IR changes seem to be just reorderings - C++ interop goes
first, then Carbon, rather than the other way around.
2026-01-17 00:15:53 +00:00

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// 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/field.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/interop/cpp/field.carbon
// --- struct.h
struct A {
int n;
alignas(16) int m;
};
// --- access_struct.carbon
library "[[@TEST_NAME]]";
import Cpp library "struct.h";
// TODO: We generate 4-byte-aligned loads here, and should generate
// 16-byte-aligned loads as Clang does.
fn AccessN(a: Cpp.A) -> i32 {
return a.n;
}
fn AccessM(a: Cpp.A) -> i32 {
return a.m;
}
// --- assign_struct.carbon
library "[[@TEST_NAME]]";
import Cpp library "struct.h";
// TODO: We generate 4-byte-aligned stores here, and should generate
// 16-byte-aligned stores as Clang does.
fn AssignN(p: Cpp.A*) {
p->n = 1;
}
fn AssignM(p: Cpp.A*) {
p->m = 1;
}
// --- union.h
union A {
int n;
int m;
};
// --- access_union.carbon
library "[[@TEST_NAME]]";
import Cpp library "union.h";
fn AccessN(a: Cpp.A) -> i32 {
return a.n;
}
fn AccessM(a: Cpp.A) -> i32 {
return a.m;
}
// --- assign_union.carbon
library "[[@TEST_NAME]]";
import Cpp library "union.h";
fn AssignN(p: Cpp.A*) {
p->n = 1;
}
fn AssignM(p: Cpp.A*) {
p->m = 1;
}
// --- anon_union.h
struct A {
int x;
union {
int n;
int *_Nonnull p;
};
};
// --- access_anon_union.carbon
library "[[@TEST_NAME]]";
import Cpp library "anon_union.h";
fn AccessN(a: Cpp.A) -> i32 {
return a.n;
}
fn AccessP(a: Cpp.A) -> i32 {
return *a.p;
}
// CHECK:STDOUT: ; ModuleID = 'access_struct.carbon'
// CHECK:STDOUT: source_filename = "access_struct.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: nounwind
// CHECK:STDOUT: define i32 @_CAccessN.Main(ptr %a) #0 !dbg !12 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc9_11.1.n = getelementptr inbounds nuw [32 x i8], ptr %a, i32 0, i32 0, !dbg !19
// CHECK:STDOUT: %.loc9_11.2 = load i32, ptr %.loc9_11.1.n, align 4, !dbg !19
// CHECK:STDOUT: ret i32 %.loc9_11.2, !dbg !20
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @_CAccessM.Main(ptr %a) #0 !dbg !21 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc13_11.1.m = getelementptr inbounds nuw [32 x i8], ptr %a, i32 0, i32 16, !dbg !24
// CHECK:STDOUT: %.loc13_11.2 = load i32, ptr %.loc13_11.1.m, align 4, !dbg !24
// CHECK:STDOUT: ret i32 %.loc13_11.2, !dbg !25
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// 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: "access_struct.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 = distinct !DISubprogram(name: "AccessN", linkageName: "_CAccessN.Main", scope: null, file: !7, line: 8, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !17)
// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
// CHECK:STDOUT: !14 = !{!15, !16}
// CHECK:STDOUT: !15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !17 = !{!18}
// CHECK:STDOUT: !18 = !DILocalVariable(arg: 1, scope: !12, type: !16)
// CHECK:STDOUT: !19 = !DILocation(line: 9, column: 10, scope: !12)
// CHECK:STDOUT: !20 = !DILocation(line: 9, column: 3, scope: !12)
// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "AccessM", linkageName: "_CAccessM.Main", scope: null, file: !7, line: 12, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !22)
// CHECK:STDOUT: !22 = !{!23}
// CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !21, type: !16)
// CHECK:STDOUT: !24 = !DILocation(line: 13, column: 10, scope: !21)
// CHECK:STDOUT: !25 = !DILocation(line: 13, column: 3, scope: !21)
// CHECK:STDOUT: ; ModuleID = 'assign_struct.carbon'
// CHECK:STDOUT: source_filename = "assign_struct.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: nounwind
// CHECK:STDOUT: define void @_CAssignN.Main(ptr %p) #0 !dbg !12 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc9_4.2.n = getelementptr inbounds nuw [32 x i8], ptr %p, i32 0, i32 0, !dbg !18
// CHECK:STDOUT: store i32 1, ptr %.loc9_4.2.n, align 4, !dbg !18
// CHECK:STDOUT: ret void, !dbg !19
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CAssignM.Main(ptr %p) #0 !dbg !20 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc13_4.2.m = getelementptr inbounds nuw [32 x i8], ptr %p, i32 0, i32 16, !dbg !23
// CHECK:STDOUT: store i32 1, ptr %.loc13_4.2.m, align 4, !dbg !23
// CHECK:STDOUT: ret void, !dbg !24
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// 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: "assign_struct.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 = distinct !DISubprogram(name: "AssignN", linkageName: "_CAssignN.Main", scope: null, file: !7, line: 8, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !16)
// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
// CHECK:STDOUT: !14 = !{null, !15}
// CHECK:STDOUT: !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !16 = !{!17}
// CHECK:STDOUT: !17 = !DILocalVariable(arg: 1, scope: !12, type: !15)
// CHECK:STDOUT: !18 = !DILocation(line: 9, column: 3, scope: !12)
// CHECK:STDOUT: !19 = !DILocation(line: 8, column: 1, scope: !12)
// CHECK:STDOUT: !20 = distinct !DISubprogram(name: "AssignM", linkageName: "_CAssignM.Main", scope: null, file: !7, line: 12, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !21)
// CHECK:STDOUT: !21 = !{!22}
// CHECK:STDOUT: !22 = !DILocalVariable(arg: 1, scope: !20, type: !15)
// CHECK:STDOUT: !23 = !DILocation(line: 13, column: 3, scope: !20)
// CHECK:STDOUT: !24 = !DILocation(line: 12, column: 1, scope: !20)
// CHECK:STDOUT: ; ModuleID = 'access_union.carbon'
// CHECK:STDOUT: source_filename = "access_union.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: nounwind
// CHECK:STDOUT: define i32 @_CAccessN.Main(ptr %a) #0 !dbg !12 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc7_11.1.n = getelementptr inbounds nuw [4 x i8], ptr %a, i32 0, i32 0, !dbg !19
// CHECK:STDOUT: %.loc7_11.2 = load i32, ptr %.loc7_11.1.n, align 4, !dbg !19
// CHECK:STDOUT: ret i32 %.loc7_11.2, !dbg !20
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @_CAccessM.Main(ptr %a) #0 !dbg !21 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc11_11.1.m = getelementptr inbounds nuw [4 x i8], ptr %a, i32 0, i32 0, !dbg !24
// CHECK:STDOUT: %.loc11_11.2 = load i32, ptr %.loc11_11.1.m, align 4, !dbg !24
// CHECK:STDOUT: ret i32 %.loc11_11.2, !dbg !25
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// 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: "access_union.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 = distinct !DISubprogram(name: "AccessN", linkageName: "_CAccessN.Main", scope: null, file: !7, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !17)
// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
// CHECK:STDOUT: !14 = !{!15, !16}
// CHECK:STDOUT: !15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !17 = !{!18}
// CHECK:STDOUT: !18 = !DILocalVariable(arg: 1, scope: !12, type: !16)
// CHECK:STDOUT: !19 = !DILocation(line: 7, column: 10, scope: !12)
// CHECK:STDOUT: !20 = !DILocation(line: 7, column: 3, scope: !12)
// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "AccessM", linkageName: "_CAccessM.Main", scope: null, file: !7, line: 10, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !22)
// CHECK:STDOUT: !22 = !{!23}
// CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !21, type: !16)
// CHECK:STDOUT: !24 = !DILocation(line: 11, column: 10, scope: !21)
// CHECK:STDOUT: !25 = !DILocation(line: 11, column: 3, scope: !21)
// CHECK:STDOUT: ; ModuleID = 'assign_union.carbon'
// CHECK:STDOUT: source_filename = "assign_union.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: nounwind
// CHECK:STDOUT: define void @_CAssignN.Main(ptr %p) #0 !dbg !12 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc7_4.2.n = getelementptr inbounds nuw [4 x i8], ptr %p, i32 0, i32 0, !dbg !18
// CHECK:STDOUT: store i32 1, ptr %.loc7_4.2.n, align 4, !dbg !18
// CHECK:STDOUT: ret void, !dbg !19
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CAssignM.Main(ptr %p) #0 !dbg !20 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc11_4.2.m = getelementptr inbounds nuw [4 x i8], ptr %p, i32 0, i32 0, !dbg !23
// CHECK:STDOUT: store i32 1, ptr %.loc11_4.2.m, align 4, !dbg !23
// CHECK:STDOUT: ret void, !dbg !24
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// 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: "assign_union.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 = distinct !DISubprogram(name: "AssignN", linkageName: "_CAssignN.Main", scope: null, file: !7, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !16)
// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
// CHECK:STDOUT: !14 = !{null, !15}
// CHECK:STDOUT: !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !16 = !{!17}
// CHECK:STDOUT: !17 = !DILocalVariable(arg: 1, scope: !12, type: !15)
// CHECK:STDOUT: !18 = !DILocation(line: 7, column: 3, scope: !12)
// CHECK:STDOUT: !19 = !DILocation(line: 6, column: 1, scope: !12)
// CHECK:STDOUT: !20 = distinct !DISubprogram(name: "AssignM", linkageName: "_CAssignM.Main", scope: null, file: !7, line: 10, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !21)
// CHECK:STDOUT: !21 = !{!22}
// CHECK:STDOUT: !22 = !DILocalVariable(arg: 1, scope: !20, type: !15)
// CHECK:STDOUT: !23 = !DILocation(line: 11, column: 3, scope: !20)
// CHECK:STDOUT: !24 = !DILocation(line: 10, column: 1, scope: !20)
// CHECK:STDOUT: ; ModuleID = 'access_anon_union.carbon'
// CHECK:STDOUT: source_filename = "access_anon_union.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: nounwind
// CHECK:STDOUT: define i32 @_CAccessN.Main(ptr %a) #0 !dbg !12 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc7_11.1.n = getelementptr inbounds nuw [16 x i8], ptr %a, i32 0, i32 8, !dbg !19
// CHECK:STDOUT: %.loc7_11.2 = load i32, ptr %.loc7_11.1.n, align 4, !dbg !19
// CHECK:STDOUT: ret i32 %.loc7_11.2, !dbg !20
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @_CAccessP.Main(ptr %a) #0 !dbg !21 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc11_12.1.p = getelementptr inbounds nuw [16 x i8], ptr %a, i32 0, i32 8, !dbg !24
// CHECK:STDOUT: %.loc11_12.2 = load ptr, ptr %.loc11_12.1.p, align 8, !dbg !24
// CHECK:STDOUT: %.loc11_10.2 = load i32, ptr %.loc11_12.2, align 4, !dbg !25
// CHECK:STDOUT: ret i32 %.loc11_10.2, !dbg !26
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// 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: "access_anon_union.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 = distinct !DISubprogram(name: "AccessN", linkageName: "_CAccessN.Main", scope: null, file: !7, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !17)
// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
// CHECK:STDOUT: !14 = !{!15, !16}
// CHECK:STDOUT: !15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !17 = !{!18}
// CHECK:STDOUT: !18 = !DILocalVariable(arg: 1, scope: !12, type: !16)
// CHECK:STDOUT: !19 = !DILocation(line: 7, column: 10, scope: !12)
// CHECK:STDOUT: !20 = !DILocation(line: 7, column: 3, scope: !12)
// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "AccessP", linkageName: "_CAccessP.Main", scope: null, file: !7, line: 10, type: !13, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !22)
// CHECK:STDOUT: !22 = !{!23}
// CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !21, type: !16)
// CHECK:STDOUT: !24 = !DILocation(line: 11, column: 11, scope: !21)
// CHECK:STDOUT: !25 = !DILocation(line: 11, column: 10, scope: !21)
// CHECK:STDOUT: !26 = !DILocation(line: 11, column: 3, scope: !21)
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