roll llvm to 7024b9e1b423b3c3c6ac76ab6a73cb2c9e4ef842 (#7781)

Updated patch 0006 to include new files added in https://github.com/llvm/llvm-project/pull/207543. Dropped patch 0009 which was upstreamed in: https://github.com/llvm/llvm-project/pull/190088 Minor updates to patch 0011 for changes upstream. Minor updates in export.cpp to use `llvm::FoldingSetInsertToken` instead of a void pointer.
2026-10-04 10:31:04 +01:00 · 2026-09-14 21:54:09 +00:00
parent 4081848d65
commit cf66fb8aeb
257 changed files with 22634 additions and 23205 deletions
@@ -33,11 +33,11 @@ import library "not_emitted";
 // CHECK:STDOUT: ; ModuleID = 'emitted.carbon'
 // CHECK:STDOUT: source_filename = "emitted.carbon"
 // CHECK:STDOUT:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!1}
 // CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "emitted.carbon", directory: "")
+// CHECK:STDOUT: !0 = !DIFile(filename: "emitted.carbon", directory: "")
+// CHECK:STDOUT: !1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !0, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
 // CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
 // CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
 // CHECK:STDOUT:
@@ -54,8 +54,8 @@ void f() {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %this.addr = alloca ptr, align 8
 // CHECK:STDOUT:   %.addr = alloca i32, align 4
-// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !12
-// CHECK:STDOUT:   store i32 %0, ptr %.addr, align 4, !tbaa !15
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !32
+// CHECK:STDOUT:   store i32 %0, ptr %.addr, align 4, !tbaa !34
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   call void @_COneArg__carbon_thunk.OneArg.Main(ptr noundef nonnull align 1 %this1, ptr noundef nonnull align 4 dereferenceable(4) %.addr)
 // CHECK:STDOUT:   ret void
@@ -65,7 +65,7 @@ void f() {
 // CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon6OneArgD2Ev(ptr noundef nonnull align 1 %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 !12
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !32
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   call void @"_C__destroy_thunk:thunk.OneArg.Main"(ptr noundef nonnull align 1 %this1)
 // CHECK:STDOUT:   ret void
@@ -77,26 +77,26 @@ void f() {
 // CHECK:STDOUT: declare void @_COneArg.OneArg.Main(ptr sret({}), i32)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
-// CHECK:STDOUT: define weak_odr void @"_C__destroy_thunk:thunk.OneArg.Main"(ptr %self) #4 !dbg !16 {
+// CHECK:STDOUT: define weak_odr void @"_C__destroy_thunk:thunk.OneArg.Main"(ptr %self) #4 !dbg !15 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @"_COp.50eaa49c486ec4e2:core.Destroy.Core"(ptr %self), !dbg !22
-// CHECK:STDOUT:   ret void, !dbg !22
+// CHECK:STDOUT:   call void @"_COp.50eaa49c486ec4e2:core.Destroy.Core"(ptr %self), !dbg !17
+// CHECK:STDOUT:   ret void, !dbg !17
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.50eaa49c486ec4e2:core.Destroy.Core"(ptr %self) #5 !dbg !23 {
+// CHECK:STDOUT: define weak_odr void @"_COp.50eaa49c486ec4e2:core.Destroy.Core"(ptr %self) #5 !dbg !19 {
 // CHECK:STDOUT: entry:
+// CHECK:STDOUT:   ret void, !dbg !21
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: ; Function Attrs: nounwind
+// CHECK:STDOUT: define void @_COneArg__carbon_thunk.OneArg.Main(ptr %_, ptr %_1) #5 !dbg !23 {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %.loc6_28.2 = load i32, ptr %_1, align 4, !dbg !26
+// CHECK:STDOUT:   call void @_COneArg.OneArg.Main(ptr %_, i32 %.loc6_28.2), !dbg !26
 // CHECK:STDOUT:   ret void, !dbg !26
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_COneArg__carbon_thunk.OneArg.Main(ptr %_, ptr %_1) #5 !dbg !27 {
-// CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc6_28.2 = load i32, ptr %_1, align 4, !dbg !34
-// CHECK:STDOUT:   call void @_COneArg.OneArg.Main(ptr %_, i32 %.loc6_28.2), !dbg !34
-// CHECK:STDOUT:   ret void, !dbg !34
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: attributes #0 = { 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 nosync nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT: attributes #2 = { 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" }
@@ -104,43 +104,43 @@ void f() {
 // CHECK:STDOUT: attributes #4 = { alwaysinline nounwind }
 // CHECK:STDOUT: attributes #5 = { nounwind }
 // CHECK:STDOUT:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!6}
+// CHECK:STDOUT: !llvm.module.flags = !{!35, !36, !37, !3, !4}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!39}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "call_constructor.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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 _ZTSN6Carbon6OneArgE", !14, i64 0}
-// CHECK:STDOUT: !14 = !{!"any pointer", !10, i64 0}
-// CHECK:STDOUT: !15 = !{!9, !9, i64 0}
-// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "__destroy_thunk", linkageName: "_C__destroy_thunk:thunk.OneArg.Main", scope: null, file: !1, line: 5, type: !17, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !20)
-// CHECK:STDOUT: !17 = !DISubroutineType(types: !18)
-// CHECK:STDOUT: !18 = !{null, !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: 5, column: 1, scope: !16)
-// CHECK:STDOUT: !23 = distinct !DISubprogram(name: "Op", linkageName: "_COp.50eaa49c486ec4e2:core.Destroy.Core", scope: null, file: !1, line: 5, type: !17, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !24)
-// CHECK:STDOUT: !24 = !{!25}
-// CHECK:STDOUT: !25 = !DILocalVariable(arg: 1, scope: !23, type: !19)
-// CHECK:STDOUT: !26 = !DILocation(line: 5, column: 1, scope: !23)
-// CHECK:STDOUT: !27 = distinct !DISubprogram(name: "OneArg__carbon_thunk", linkageName: "_COneArg__carbon_thunk.OneArg.Main", scope: null, file: !1, line: 6, type: !28, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !31)
-// CHECK:STDOUT: !28 = !DISubroutineType(types: !29)
-// CHECK:STDOUT: !29 = !{null, !19, !30}
-// CHECK:STDOUT: !30 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !31 = !{!32, !33}
-// CHECK:STDOUT: !32 = !DILocalVariable(arg: 1, scope: !27, type: !19)
-// CHECK:STDOUT: !33 = !DILocalVariable(arg: 2, scope: !27, type: !30)
-// CHECK:STDOUT: !34 = !DILocation(line: 6, column: 3, scope: !27)
+// CHECK:STDOUT: !3 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !4 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !5 = !DIFile(filename: "call_constructor.carbon", directory: "")
+// CHECK:STDOUT: !6 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !5, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !11 = !{null, !8}
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !11)
+// CHECK:STDOUT: !13 = !{null, !8, !7}
+// CHECK:STDOUT: !14 = !DISubroutineType(types: !13)
+// CHECK:STDOUT: !15 = distinct !DISubprogram(name: "__destroy_thunk", linkageName: "_C__destroy_thunk:thunk.OneArg.Main", scope: null, file: !5, line: 5, type: !12, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !18)
+// CHECK:STDOUT: !16 = !DILocalVariable(arg: 1, scope: !15, type: !8)
+// CHECK:STDOUT: !17 = !DILocation(line: 5, column: 1, scope: !15)
+// CHECK:STDOUT: !18 = !{!16}
+// CHECK:STDOUT: !19 = distinct !DISubprogram(name: "Op", linkageName: "_COp.50eaa49c486ec4e2:core.Destroy.Core", scope: null, file: !5, line: 5, type: !12, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !22)
+// CHECK:STDOUT: !20 = !DILocalVariable(arg: 1, scope: !19, type: !8)
+// CHECK:STDOUT: !21 = !DILocation(line: 5, column: 1, scope: !19)
+// CHECK:STDOUT: !22 = !{!20}
+// CHECK:STDOUT: !23 = distinct !DISubprogram(name: "OneArg__carbon_thunk", linkageName: "_COneArg__carbon_thunk.OneArg.Main", scope: null, file: !5, line: 6, type: !14, spFlags: DISPFlagDefinition, unit: !6, retainedNodes: !27)
+// CHECK:STDOUT: !24 = !DILocalVariable(arg: 1, scope: !23, type: !8)
+// CHECK:STDOUT: !25 = !DILocalVariable(arg: 2, scope: !23, type: !7)
+// CHECK:STDOUT: !26 = !DILocation(line: 6, column: 3, scope: !23)
+// CHECK:STDOUT: !27 = !{!24, !25}
+// CHECK:STDOUT: !28 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !29 = !{!"omnipotent char", !28, i64 0}
+// CHECK:STDOUT: !30 = !{!"any pointer", !29, i64 0}
+// CHECK:STDOUT: !31 = !{!"p1 _ZTSN6Carbon6OneArgE", !30, i64 0}
+// CHECK:STDOUT: !32 = !{!31, !31, i64 0}
+// CHECK:STDOUT: !33 = !{!"int", !29, i64 0}
+// CHECK:STDOUT: !34 = !{!33, !33, i64 0}
+// CHECK:STDOUT: !35 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !36 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !37 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !38 = !{!"__libc_errno", !33, i64 0}
+// CHECK:STDOUT: !39 = !{!38, !33, i64 0}
 // CHECK:STDOUT:
@@ -67,70 +67,70 @@ fn H() { Cpp.G2(); }
 // CHECK:STDOUT: source_filename = "other.carbon"
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CNoArgs.Other() #0 !dbg !4 {
+// CHECK:STDOUT: define void @_CNoArgs.Other() #0 !dbg !16 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !7
+// CHECK:STDOUT:   ret void, !dbg !17
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CBoolArg.Other(i1 %a) #0 !dbg !8 {
+// CHECK:STDOUT: define void @_CBoolArg.Other(i1 %a) #0 !dbg !18 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !14
+// CHECK:STDOUT:   ret void, !dbg !22
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CIntArg.Other(i32 %a) #0 !dbg !15 {
+// CHECK:STDOUT: define void @_CIntArg.Other(i32 %a) #0 !dbg !24 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !21
+// CHECK:STDOUT:   ret void, !dbg !28
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CFloatArg.Other(float %a) #0 !dbg !22 {
+// CHECK:STDOUT: define void @_CFloatArg.Other(float %a) #0 !dbg !30 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !25
+// CHECK:STDOUT:   ret void, !dbg !34
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CIntReturn.Other() #0 !dbg !26 {
+// CHECK:STDOUT: define i32 @_CIntReturn.Other() #0 !dbg !36 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret i32 123, !dbg !29
+// CHECK:STDOUT:   ret i32 123, !dbg !39
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: attributes #0 = { nounwind }
 // CHECK:STDOUT:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!5}
 // CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "other.carbon", directory: "")
 // CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
 // CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "NoArgs", linkageName: "_CNoArgs.Other", scope: null, file: !1, line: 2, type: !5, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
-// CHECK:STDOUT: !6 = !{null}
-// CHECK:STDOUT: !7 = !DILocation(line: 2, column: 1, scope: !4)
-// CHECK:STDOUT: !8 = distinct !DISubprogram(name: "BoolArg", linkageName: "_CBoolArg.Other", scope: null, file: !1, line: 3, type: !9, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !12)
-// CHECK:STDOUT: !9 = !DISubroutineType(types: !10)
-// CHECK:STDOUT: !10 = !{null, !11}
-// CHECK:STDOUT: !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !12 = !{!13}
-// CHECK:STDOUT: !13 = !DILocalVariable(arg: 1, scope: !8, type: !11)
-// CHECK:STDOUT: !14 = !DILocation(line: 3, column: 1, scope: !8)
-// CHECK:STDOUT: !15 = distinct !DISubprogram(name: "IntArg", linkageName: "_CIntArg.Other", scope: null, file: !1, line: 6, type: !16, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !19)
-// CHECK:STDOUT: !16 = !DISubroutineType(types: !17)
-// CHECK:STDOUT: !17 = !{null, !18}
-// CHECK:STDOUT: !18 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !19 = !{!20}
-// CHECK:STDOUT: !20 = !DILocalVariable(arg: 1, scope: !15, type: !18)
-// CHECK:STDOUT: !21 = !DILocation(line: 6, column: 1, scope: !15)
-// CHECK:STDOUT: !22 = distinct !DISubprogram(name: "FloatArg", linkageName: "_CFloatArg.Other", scope: null, file: !1, line: 9, type: !9, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !23)
-// CHECK:STDOUT: !23 = !{!24}
-// CHECK:STDOUT: !24 = !DILocalVariable(arg: 1, scope: !22, type: !11)
-// CHECK:STDOUT: !25 = !DILocation(line: 9, column: 1, scope: !22)
-// CHECK:STDOUT: !26 = distinct !DISubprogram(name: "IntReturn", linkageName: "_CIntReturn.Other", scope: null, file: !1, line: 12, type: !27, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !27 = !DISubroutineType(types: !28)
-// CHECK:STDOUT: !28 = !{!18}
-// CHECK:STDOUT: !29 = !DILocation(line: 13, column: 3, scope: !26)
+// CHECK:STDOUT: !4 = !DIFile(filename: "other.carbon", directory: "")
+// CHECK:STDOUT: !5 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !7 = !{null}
+// CHECK:STDOUT: !8 = !DISubroutineType(types: !7)
+// CHECK:STDOUT: !9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !10 = !{null, !9}
+// CHECK:STDOUT: !11 = !DISubroutineType(types: !10)
+// CHECK:STDOUT: !12 = !{null, !6}
+// CHECK:STDOUT: !13 = !DISubroutineType(types: !12)
+// CHECK:STDOUT: !14 = !{!6}
+// CHECK:STDOUT: !15 = !DISubroutineType(types: !14)
+// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "NoArgs", linkageName: "_CNoArgs.Other", scope: null, file: !4, line: 2, type: !8, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !17 = !DILocation(line: 2, column: 1, scope: !16)
+// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "BoolArg", linkageName: "_CBoolArg.Other", scope: null, file: !4, line: 3, type: !11, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !23)
+// CHECK:STDOUT: !19 = !DILocalVariable(arg: 1, scope: !18, type: !9)
+// CHECK:STDOUT: !22 = !DILocation(line: 3, column: 1, scope: !18)
+// CHECK:STDOUT: !23 = !{!19}
+// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "IntArg", linkageName: "_CIntArg.Other", scope: null, file: !4, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !29)
+// CHECK:STDOUT: !25 = !DILocalVariable(arg: 1, scope: !24, type: !6)
+// CHECK:STDOUT: !28 = !DILocation(line: 6, column: 1, scope: !24)
+// CHECK:STDOUT: !29 = !{!25}
+// CHECK:STDOUT: !30 = distinct !DISubprogram(name: "FloatArg", linkageName: "_CFloatArg.Other", scope: null, file: !4, line: 9, type: !11, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !35)
+// CHECK:STDOUT: !31 = !DILocalVariable(arg: 1, scope: !30, type: !9)
+// CHECK:STDOUT: !34 = !DILocation(line: 9, column: 1, scope: !30)
+// CHECK:STDOUT: !35 = !{!31}
+// CHECK:STDOUT: !36 = distinct !DISubprogram(name: "IntReturn", linkageName: "_CIntReturn.Other", scope: null, file: !4, line: 12, type: !15, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !39 = !DILocation(line: 13, column: 3, scope: !36)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'function.carbon'
@@ -161,7 +161,7 @@ fn H() { Cpp.G2(); }
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca i8, align 1
 // CHECK:STDOUT:   %storedv = zext i1 %0 to i8
-// CHECK:STDOUT:   store i8 %storedv, ptr %.addr, align 1, !tbaa !12
+// CHECK:STDOUT:   store i8 %storedv, ptr %.addr, align 1, !tbaa !63
 // CHECK:STDOUT:   call void @_CBoolArg__carbon_thunk.Other(ptr noundef nonnull align 1 dereferenceable(1) %.addr)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
@@ -170,7 +170,7 @@ fn H() { Cpp.G2(); }
 // CHECK:STDOUT: define internal void @_ZN6Carbon5OtherL6IntArgEi(i32 noundef %0) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca i32, align 4
-// CHECK:STDOUT:   store i32 %0, ptr %.addr, align 4, !tbaa !14
+// CHECK:STDOUT:   store i32 %0, ptr %.addr, align 4, !tbaa !65
 // CHECK:STDOUT:   call void @_CIntArg__carbon_thunk.Other(ptr noundef nonnull align 4 dereferenceable(4) %.addr)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
@@ -179,7 +179,7 @@ fn H() { Cpp.G2(); }
 // CHECK:STDOUT: define internal void @_ZN6Carbon5OtherL8FloatArgEf(float noundef %0) #1 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %.addr = alloca float, align 4
-// CHECK:STDOUT:   store float %0, ptr %.addr, align 4, !tbaa !15
+// CHECK:STDOUT:   store float %0, ptr %.addr, align 4, !tbaa !67
 // CHECK:STDOUT:   call void @_CFloatArg__carbon_thunk.Other(ptr noundef nonnull align 4 dereferenceable(4) %.addr)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
@@ -196,105 +196,105 @@ fn H() { Cpp.G2(); }
 // CHECK:STDOUT: declare void @_CNoArgs.Other()
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CNoArgs__carbon_thunk.Other() #2 !dbg !17 {
+// CHECK:STDOUT: define void @_CNoArgs__carbon_thunk.Other() #2 !dbg !42 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_CNoArgs.Other(), !dbg !21
-// CHECK:STDOUT:   ret void, !dbg !21
+// CHECK:STDOUT:   call void @_CNoArgs.Other(), !dbg !43
+// CHECK:STDOUT:   ret void, !dbg !43
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_CBoolArg.Other(i1)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CBoolArg__carbon_thunk.Other(ptr %_) #2 !dbg !22 {
+// CHECK:STDOUT: define void @_CBoolArg__carbon_thunk.Other(ptr %_) #2 !dbg !44 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.1 = load i8, ptr %_, align 1, !dbg !28
-// CHECK:STDOUT:   %.11 = trunc i8 %.1 to i1, !dbg !28
-// CHECK:STDOUT:   call void @_CBoolArg.Other(i1 %.11), !dbg !28
-// CHECK:STDOUT:   ret void, !dbg !28
+// CHECK:STDOUT:   %.1 = load i8, ptr %_, align 1, !dbg !46
+// CHECK:STDOUT:   %.11 = trunc i8 %.1 to i1, !dbg !46
+// CHECK:STDOUT:   call void @_CBoolArg.Other(i1 %.11), !dbg !46
+// CHECK:STDOUT:   ret void, !dbg !46
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_CIntArg.Other(i32)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CIntArg__carbon_thunk.Other(ptr %_) #2 !dbg !29 {
+// CHECK:STDOUT: define void @_CIntArg__carbon_thunk.Other(ptr %_) #2 !dbg !48 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.1 = load i32, ptr %_, align 4, !dbg !35
-// CHECK:STDOUT:   call void @_CIntArg.Other(i32 %.1), !dbg !35
-// CHECK:STDOUT:   ret void, !dbg !35
+// CHECK:STDOUT:   %.1 = load i32, ptr %_, align 4, !dbg !50
+// CHECK:STDOUT:   call void @_CIntArg.Other(i32 %.1), !dbg !50
+// CHECK:STDOUT:   ret void, !dbg !50
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_CFloatArg.Other(float)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CFloatArg__carbon_thunk.Other(ptr %_) #2 !dbg !36 {
+// CHECK:STDOUT: define void @_CFloatArg__carbon_thunk.Other(ptr %_) #2 !dbg !52 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.1 = load float, ptr %_, align 4, !dbg !39
-// CHECK:STDOUT:   call void @_CFloatArg.Other(float %.1), !dbg !39
-// CHECK:STDOUT:   ret void, !dbg !39
+// CHECK:STDOUT:   %.1 = load float, ptr %_, align 4, !dbg !54
+// CHECK:STDOUT:   call void @_CFloatArg.Other(float %.1), !dbg !54
+// CHECK:STDOUT:   ret void, !dbg !54
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare i32 @_CIntReturn.Other()
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CIntReturn__carbon_thunk.Other(ptr %_) #2 !dbg !40 {
+// CHECK:STDOUT: define void @_CIntReturn__carbon_thunk.Other(ptr %_) #2 !dbg !56 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %IntReturn.call = call i32 @_CIntReturn.Other(), !dbg !43
-// CHECK:STDOUT:   store i32 %IntReturn.call, ptr %_, align 4, !dbg !43
-// CHECK:STDOUT:   ret void, !dbg !43
+// CHECK:STDOUT:   %IntReturn.call = call i32 @_CIntReturn.Other(), !dbg !58
+// CHECK:STDOUT:   store i32 %IntReturn.call, ptr %_, align 4, !dbg !58
+// CHECK:STDOUT:   ret void, !dbg !58
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: attributes #0 = { 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 = { 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 = { nounwind }
 // CHECK:STDOUT:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!41}
+// CHECK:STDOUT: !llvm.module.flags = !{!68, !69, !70, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!72}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "function.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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 = !{!"bool", !10, i64 0}
-// CHECK:STDOUT: !14 = !{!9, !9, i64 0}
-// CHECK:STDOUT: !15 = !{!16, !16, i64 0}
-// CHECK:STDOUT: !16 = !{!"float", !10, i64 0}
-// CHECK:STDOUT: !17 = distinct !DISubprogram(name: "NoArgs__carbon_thunk", linkageName: "_CNoArgs__carbon_thunk.Other", scope: null, file: !18, line: 2, type: !19, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !18 = !DIFile(filename: "other.carbon", directory: "")
-// CHECK:STDOUT: !19 = !DISubroutineType(types: !20)
-// CHECK:STDOUT: !20 = !{null}
-// CHECK:STDOUT: !21 = !DILocation(line: 2, column: 1, scope: !17)
-// CHECK:STDOUT: !22 = distinct !DISubprogram(name: "BoolArg__carbon_thunk", linkageName: "_CBoolArg__carbon_thunk.Other", scope: null, file: !18, line: 3, type: !23, spFlags: DISPFlagDefinition, unit: !0, 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: 3, column: 1, scope: !22)
-// CHECK:STDOUT: !29 = distinct !DISubprogram(name: "IntArg__carbon_thunk", linkageName: "_CIntArg__carbon_thunk.Other", scope: null, file: !18, line: 6, type: !30, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !33)
-// CHECK:STDOUT: !30 = !DISubroutineType(types: !31)
-// CHECK:STDOUT: !31 = !{null, !32}
-// CHECK:STDOUT: !32 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !33 = !{!34}
-// CHECK:STDOUT: !34 = !DILocalVariable(arg: 1, scope: !29, type: !32)
-// CHECK:STDOUT: !35 = !DILocation(line: 6, column: 1, scope: !29)
-// CHECK:STDOUT: !36 = distinct !DISubprogram(name: "FloatArg__carbon_thunk", linkageName: "_CFloatArg__carbon_thunk.Other", scope: null, file: !18, line: 9, type: !23, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !37)
-// CHECK:STDOUT: !37 = !{!38}
-// CHECK:STDOUT: !38 = !DILocalVariable(arg: 1, scope: !36, type: !25)
-// CHECK:STDOUT: !39 = !DILocation(line: 9, column: 1, scope: !36)
-// CHECK:STDOUT: !40 = distinct !DISubprogram(name: "IntReturn__carbon_thunk", linkageName: "_CIntReturn__carbon_thunk.Other", scope: null, file: !18, line: 12, type: !30, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !41)
-// CHECK:STDOUT: !41 = !{!42}
-// CHECK:STDOUT: !42 = !DILocalVariable(arg: 1, scope: !40, type: !32)
-// CHECK:STDOUT: !43 = !DILocation(line: 12, column: 1, scope: !40)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !4 = !DIFile(filename: "other.carbon", directory: "")
+// CHECK:STDOUT: !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !7 = !{null}
+// CHECK:STDOUT: !8 = !DISubroutineType(types: !7)
+// CHECK:STDOUT: !9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !10 = !{null, !9}
+// CHECK:STDOUT: !11 = !DISubroutineType(types: !10)
+// CHECK:STDOUT: !12 = !{null, !6}
+// CHECK:STDOUT: !13 = !DISubroutineType(types: !12)
+// CHECK:STDOUT: !40 = !DIFile(filename: "function.carbon", directory: "")
+// CHECK:STDOUT: !41 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !40, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !42 = distinct !DISubprogram(name: "NoArgs__carbon_thunk", linkageName: "_CNoArgs__carbon_thunk.Other", scope: null, file: !4, line: 2, type: !8, spFlags: DISPFlagDefinition, unit: !41)
+// CHECK:STDOUT: !43 = !DILocation(line: 2, column: 1, scope: !42)
+// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "BoolArg__carbon_thunk", linkageName: "_CBoolArg__carbon_thunk.Other", scope: null, file: !4, line: 3, type: !11, spFlags: DISPFlagDefinition, unit: !41, retainedNodes: !47)
+// CHECK:STDOUT: !45 = !DILocalVariable(arg: 1, scope: !44, type: !9)
+// CHECK:STDOUT: !46 = !DILocation(line: 3, column: 1, scope: !44)
+// CHECK:STDOUT: !47 = !{!45}
+// CHECK:STDOUT: !48 = distinct !DISubprogram(name: "IntArg__carbon_thunk", linkageName: "_CIntArg__carbon_thunk.Other", scope: null, file: !4, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !41, retainedNodes: !51)
+// CHECK:STDOUT: !49 = !DILocalVariable(arg: 1, scope: !48, type: !6)
+// CHECK:STDOUT: !50 = !DILocation(line: 6, column: 1, scope: !48)
+// CHECK:STDOUT: !51 = !{!49}
+// CHECK:STDOUT: !52 = distinct !DISubprogram(name: "FloatArg__carbon_thunk", linkageName: "_CFloatArg__carbon_thunk.Other", scope: null, file: !4, line: 9, type: !11, spFlags: DISPFlagDefinition, unit: !41, retainedNodes: !55)
+// CHECK:STDOUT: !53 = !DILocalVariable(arg: 1, scope: !52, type: !9)
+// CHECK:STDOUT: !54 = !DILocation(line: 9, column: 1, scope: !52)
+// CHECK:STDOUT: !55 = !{!53}
+// CHECK:STDOUT: !56 = distinct !DISubprogram(name: "IntReturn__carbon_thunk", linkageName: "_CIntReturn__carbon_thunk.Other", scope: null, file: !4, line: 12, type: !13, spFlags: DISPFlagDefinition, unit: !41, retainedNodes: !59)
+// CHECK:STDOUT: !57 = !DILocalVariable(arg: 1, scope: !56, type: !6)
+// CHECK:STDOUT: !58 = !DILocation(line: 12, column: 1, scope: !56)
+// CHECK:STDOUT: !59 = !{!57}
+// CHECK:STDOUT: !60 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !61 = !{!"omnipotent char", !60, i64 0}
+// CHECK:STDOUT: !62 = !{!"bool", !61, i64 0}
+// CHECK:STDOUT: !63 = !{!62, !62, i64 0}
+// CHECK:STDOUT: !64 = !{!"int", !61, i64 0}
+// CHECK:STDOUT: !65 = !{!64, !64, i64 0}
+// CHECK:STDOUT: !66 = !{!"float", !61, i64 0}
+// CHECK:STDOUT: !67 = !{!66, !66, i64 0}
+// CHECK:STDOUT: !68 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !69 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !70 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !71 = !{!"__libc_errno", !64, i64 0}
+// CHECK:STDOUT: !72 = !{!71, !64, i64 0}
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'single_file.carbon'
@@ -307,23 +307,23 @@ fn H() { Cpp.G2(); }
 // CHECK:STDOUT: $_Z2G1v = comdat any
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !75 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !15
+// CHECK:STDOUT:   ret void, !dbg !76
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CF__carbon_thunk.Main() #0 !dbg !16 {
+// CHECK:STDOUT: define void @_CF__carbon_thunk.Main() #0 !dbg !77 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_CF.Main(), !dbg !17
-// CHECK:STDOUT:   ret void, !dbg !17
+// CHECK:STDOUT:   call void @_CF.Main(), !dbg !78
+// CHECK:STDOUT:   ret void, !dbg !78
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CH.Main() #0 !dbg !18 {
+// CHECK:STDOUT: define void @_CH.Main() #0 !dbg !79 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z2G2v(), !dbg !19
-// CHECK:STDOUT:   ret void, !dbg !20
+// CHECK:STDOUT:   call void @_Z2G2v(), !dbg !80
+// CHECK:STDOUT:   ret void, !dbg !81
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress uwtable
@@ -351,29 +351,29 @@ fn H() { Cpp.G2(); }
 // 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 = { 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:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!74}
+// CHECK:STDOUT: !llvm.module.flags = !{!68, !69, !70, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!72}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "single_file.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "F", linkageName: "_CF.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 6, column: 1, scope: !12)
-// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "F__carbon_thunk", linkageName: "_CF__carbon_thunk.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !17 = !DILocation(line: 6, column: 1, scope: !16)
-// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "H", linkageName: "_CH.Main", scope: null, file: !1, line: 20, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !19 = !DILocation(line: 20, column: 10, scope: !18)
-// CHECK:STDOUT: !20 = !DILocation(line: 20, column: 1, scope: !18)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !7 = !{null}
+// CHECK:STDOUT: !8 = !DISubroutineType(types: !7)
+// CHECK:STDOUT: !60 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !61 = !{!"omnipotent char", !60, i64 0}
+// CHECK:STDOUT: !64 = !{!"int", !61, i64 0}
+// CHECK:STDOUT: !68 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !69 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !70 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !71 = !{!"__libc_errno", !64, i64 0}
+// CHECK:STDOUT: !72 = !{!71, !64, i64 0}
+// CHECK:STDOUT: !73 = !DIFile(filename: "single_file.carbon", directory: "")
+// CHECK:STDOUT: !74 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !73, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !75 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !73, line: 6, type: !8, spFlags: DISPFlagDefinition, unit: !74)
+// CHECK:STDOUT: !76 = !DILocation(line: 6, column: 1, scope: !75)
+// CHECK:STDOUT: !77 = distinct !DISubprogram(name: "F__carbon_thunk", linkageName: "_CF__carbon_thunk.Main", scope: null, file: !73, line: 6, type: !8, spFlags: DISPFlagDefinition, unit: !74)
+// CHECK:STDOUT: !78 = !DILocation(line: 6, column: 1, scope: !77)
+// CHECK:STDOUT: !79 = distinct !DISubprogram(name: "H", linkageName: "_CH.Main", scope: null, file: !73, line: 20, type: !8, spFlags: DISPFlagDefinition, unit: !74)
+// CHECK:STDOUT: !80 = !DILocation(line: 20, column: 10, scope: !79)
+// CHECK:STDOUT: !81 = !DILocation(line: 20, column: 1, scope: !79)
 // CHECK:STDOUT:
@@ -142,7 +142,7 @@ fn Run() {
 // CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon1AD2Ev(ptr noundef nonnull align 1 %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 !12
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !71
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   call void @"_C__destroy_thunk:thunk.A.Main"(ptr noundef nonnull align 1 %this1)
 // CHECK:STDOUT:   ret void
@@ -160,7 +160,7 @@ fn Run() {
 // CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon1BD2Ev(ptr noundef nonnull align 1 %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 !15
+// CHECK:STDOUT:   store ptr %this, ptr %this.addr, align 8, !tbaa !73
 // CHECK:STDOUT:   %this1 = load ptr, ptr %this.addr, align 8
 // CHECK:STDOUT:   call void @"_C__destroy_thunk:thunk.B.Main"(ptr noundef nonnull align 1 %this1)
 // CHECK:STDOUT:   ret void
@@ -170,76 +170,76 @@ fn Run() {
 // CHECK:STDOUT: declare void @llvm.lifetime.end.p0(ptr captures(none)) #1
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @"_CDoit.A.Main:I.Main"(ptr %self) #4 !dbg !17 {
+// CHECK:STDOUT: define void @"_CDoit.A.Main:I.Main"(ptr %self) #4 !dbg !18 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !23
+// CHECK:STDOUT:   ret void, !dbg !21
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @"_CDoit.B.Main:I.Main"(ptr %self) #4 !dbg !24 {
+// CHECK:STDOUT: define void @"_CDoit.B.Main:I.Main"(ptr %self) #4 !dbg !23 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !27
+// CHECK:STDOUT:   ret void, !dbg !26
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
 // CHECK:STDOUT: define weak_odr void @"_C__destroy_thunk:thunk.A.Main"(ptr %self) #5 !dbg !28 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @"_COp.e649d414b9e7644a:core.Destroy.Core"(ptr %self), !dbg !31
-// CHECK:STDOUT:   ret void, !dbg !31
+// CHECK:STDOUT:   call void @"_COp.e649d414b9e7644a:core.Destroy.Core"(ptr %self), !dbg !30
+// CHECK:STDOUT:   ret void, !dbg !30
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
 // CHECK:STDOUT: define weak_odr void @"_COp.e649d414b9e7644a:core.Destroy.Core"(ptr %self) #4 !dbg !32 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !35
+// CHECK:STDOUT:   ret void, !dbg !34
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
 // CHECK:STDOUT: define weak_odr void @"_C__destroy_thunk:thunk.B.Main"(ptr %self) #5 !dbg !36 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @"_COp.535580a8a7a96b3b:core.Destroy.Core"(ptr %self), !dbg !39
-// CHECK:STDOUT:   ret void, !dbg !39
+// CHECK:STDOUT:   call void @"_COp.535580a8a7a96b3b:core.Destroy.Core"(ptr %self), !dbg !38
+// CHECK:STDOUT:   ret void, !dbg !38
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
 // CHECK:STDOUT: define weak_odr void @"_COp.535580a8a7a96b3b:core.Destroy.Core"(ptr %self) #4 !dbg !40 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !43
+// CHECK:STDOUT:   ret void, !dbg !42
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
 // CHECK:STDOUT: define void @_CF__carbon_thunk.26f2099a79512a5d.Main(ptr %_) #4 !dbg !44 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_CF.Main.6662a1ffb773360a(ptr %_), !dbg !47
-// CHECK:STDOUT:   ret void, !dbg !47
+// CHECK:STDOUT:   call void @_CF.Main.6662a1ffb773360a(ptr %_), !dbg !46
+// CHECK:STDOUT:   ret void, !dbg !46
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
 // CHECK:STDOUT: define void @_CF__carbon_thunk.7a3b9f04ddf4269e.Main(ptr %_) #4 !dbg !48 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_CF.Main.d53b17eed3ce903c(ptr %_), !dbg !51
-// CHECK:STDOUT:   ret void, !dbg !51
+// CHECK:STDOUT:   call void @_CF.Main.d53b17eed3ce903c(ptr %_), !dbg !50
+// CHECK:STDOUT:   ret void, !dbg !50
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
 // CHECK:STDOUT: define i32 @main() #4 !dbg !52 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z1Gv(), !dbg !56
-// CHECK:STDOUT:   ret i32 0, !dbg !57
+// CHECK:STDOUT:   call void @_Z1Gv(), !dbg !53
+// CHECK:STDOUT:   ret i32 0, !dbg !54
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr void @_CF.Main.6662a1ffb773360a(ptr %t) #4 !dbg !58 {
+// CHECK:STDOUT: define linkonce_odr void @_CF.Main.6662a1ffb773360a(ptr %t) #4 !dbg !55 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @"_CDoit.A.Main:I.Main"(ptr %t), !dbg !61
-// CHECK:STDOUT:   ret void, !dbg !62
+// CHECK:STDOUT:   call void @"_CDoit.A.Main:I.Main"(ptr %t), !dbg !58
+// CHECK:STDOUT:   ret void, !dbg !59
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define linkonce_odr void @_CF.Main.d53b17eed3ce903c(ptr %t) #4 !dbg !63 {
+// CHECK:STDOUT: define linkonce_odr void @_CF.Main.d53b17eed3ce903c(ptr %t) #4 !dbg !61 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @"_CDoit.B.Main:I.Main"(ptr %t), !dbg !66
-// CHECK:STDOUT:   ret void, !dbg !67
+// CHECK:STDOUT:   call void @"_CDoit.B.Main:I.Main"(ptr %t), !dbg !64
+// CHECK:STDOUT:   ret void, !dbg !65
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
@@ -255,76 +255,76 @@ fn Run() {
 // CHECK:STDOUT: attributes #4 = { nounwind }
 // CHECK:STDOUT: attributes #5 = { alwaysinline nounwind }
 // CHECK:STDOUT:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!9}
+// CHECK:STDOUT: !llvm.module.flags = !{!74, !75, !76, !4, !5}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!79}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "generic_type_impls_interface.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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 _ZTSN6Carbon1AE", !14, i64 0}
-// CHECK:STDOUT: !14 = !{!"any pointer", !10, i64 0}
-// CHECK:STDOUT: !15 = !{!16, !16, i64 0}
-// CHECK:STDOUT: !16 = !{!"p1 _ZTSN6Carbon1BE", !14, i64 0}
-// CHECK:STDOUT: !17 = distinct !DISubprogram(name: "Doit", linkageName: "_CDoit.A.Main:I.Main", scope: null, file: !1, line: 10, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !21)
-// CHECK:STDOUT: !18 = !DISubroutineType(types: !19)
-// CHECK:STDOUT: !19 = !{null, !20}
-// CHECK:STDOUT: !20 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !21 = !{!22}
-// CHECK:STDOUT: !22 = !DILocalVariable(arg: 1, scope: !17, type: !20)
-// CHECK:STDOUT: !23 = !DILocation(line: 10, column: 5, scope: !17)
-// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "Doit", linkageName: "_CDoit.B.Main:I.Main", scope: null, file: !1, line: 15, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !25)
-// CHECK:STDOUT: !25 = !{!26}
-// CHECK:STDOUT: !26 = !DILocalVariable(arg: 1, scope: !24, type: !20)
-// CHECK:STDOUT: !27 = !DILocation(line: 15, column: 5, scope: !24)
-// CHECK:STDOUT: !28 = distinct !DISubprogram(name: "__destroy_thunk", linkageName: "_C__destroy_thunk:thunk.A.Main", scope: null, file: !1, line: 8, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !29)
-// CHECK:STDOUT: !29 = !{!30}
-// CHECK:STDOUT: !30 = !DILocalVariable(arg: 1, scope: !28, type: !20)
-// CHECK:STDOUT: !31 = !DILocation(line: 8, column: 1, scope: !28)
-// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "Op", linkageName: "_COp.e649d414b9e7644a:core.Destroy.Core", scope: null, file: !1, line: 8, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !33)
-// CHECK:STDOUT: !33 = !{!34}
-// CHECK:STDOUT: !34 = !DILocalVariable(arg: 1, scope: !32, type: !20)
-// CHECK:STDOUT: !35 = !DILocation(line: 8, column: 1, scope: !32)
-// CHECK:STDOUT: !36 = distinct !DISubprogram(name: "__destroy_thunk", linkageName: "_C__destroy_thunk:thunk.B.Main", scope: null, file: !1, line: 13, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !37)
-// CHECK:STDOUT: !37 = !{!38}
-// CHECK:STDOUT: !38 = !DILocalVariable(arg: 1, scope: !36, type: !20)
-// CHECK:STDOUT: !39 = !DILocation(line: 13, column: 1, scope: !36)
-// CHECK:STDOUT: !40 = distinct !DISubprogram(name: "Op", linkageName: "_COp.535580a8a7a96b3b:core.Destroy.Core", scope: null, file: !1, line: 13, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !41)
-// CHECK:STDOUT: !41 = !{!42}
-// CHECK:STDOUT: !42 = !DILocalVariable(arg: 1, scope: !40, type: !20)
-// CHECK:STDOUT: !43 = !DILocation(line: 13, column: 1, scope: !40)
-// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "F__carbon_thunk.26f2099a79512a5d", linkageName: "_CF__carbon_thunk.26f2099a79512a5d.Main", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !45)
-// CHECK:STDOUT: !45 = !{!46}
-// CHECK:STDOUT: !46 = !DILocalVariable(arg: 1, scope: !44, type: !20)
-// CHECK:STDOUT: !47 = !DILocation(line: 19, column: 1, scope: !44)
-// CHECK:STDOUT: !48 = distinct !DISubprogram(name: "F__carbon_thunk.7a3b9f04ddf4269e", linkageName: "_CF__carbon_thunk.7a3b9f04ddf4269e.Main", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !49)
-// CHECK:STDOUT: !49 = !{!50}
-// CHECK:STDOUT: !50 = !DILocalVariable(arg: 1, scope: !48, type: !20)
-// CHECK:STDOUT: !51 = !DILocation(line: 19, column: 1, scope: !48)
-// CHECK:STDOUT: !52 = distinct !DISubprogram(name: "Run", linkageName: "main", scope: null, file: !1, line: 32, type: !53, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !53 = !DISubroutineType(types: !54)
-// CHECK:STDOUT: !54 = !{!55}
-// CHECK:STDOUT: !55 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !56 = !DILocation(line: 33, column: 3, scope: !52)
-// CHECK:STDOUT: !57 = !DILocation(line: 32, column: 1, scope: !52)
-// CHECK:STDOUT: !58 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.6662a1ffb773360a", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !59)
-// CHECK:STDOUT: !59 = !{!60}
-// CHECK:STDOUT: !60 = !DILocalVariable(arg: 1, scope: !58, type: !20)
-// CHECK:STDOUT: !61 = !DILocation(line: 20, column: 3, scope: !58)
-// CHECK:STDOUT: !62 = !DILocation(line: 19, column: 1, scope: !58)
-// CHECK:STDOUT: !63 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.d53b17eed3ce903c", scope: null, file: !1, line: 19, type: !18, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !64)
-// CHECK:STDOUT: !64 = !{!65}
-// CHECK:STDOUT: !65 = !DILocalVariable(arg: 1, scope: !63, type: !20)
-// CHECK:STDOUT: !66 = !DILocation(line: 20, column: 3, scope: !63)
-// CHECK:STDOUT: !67 = !DILocation(line: 19, column: 1, scope: !63)
+// CHECK:STDOUT: !4 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !5 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !8 = !DIFile(filename: "generic_type_impls_interface.carbon", directory: "")
+// CHECK:STDOUT: !9 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !8, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !11 = !{null, !10}
+// CHECK:STDOUT: !12 = !DISubroutineType(types: !11)
+// CHECK:STDOUT: !13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !14 = !{!13}
+// CHECK:STDOUT: !15 = !DISubroutineType(types: !14)
+// CHECK:STDOUT: !18 = distinct !DISubprogram(name: "Doit", linkageName: "_CDoit.A.Main:I.Main", scope: null, file: !8, line: 10, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !22)
+// CHECK:STDOUT: !19 = !DILocalVariable(arg: 1, scope: !18, type: !10)
+// CHECK:STDOUT: !21 = !DILocation(line: 10, column: 5, scope: !18)
+// CHECK:STDOUT: !22 = !{!19}
+// CHECK:STDOUT: !23 = distinct !DISubprogram(name: "Doit", linkageName: "_CDoit.B.Main:I.Main", scope: null, file: !8, line: 15, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !27)
+// CHECK:STDOUT: !24 = !DILocalVariable(arg: 1, scope: !23, type: !10)
+// CHECK:STDOUT: !26 = !DILocation(line: 15, column: 5, scope: !23)
+// CHECK:STDOUT: !27 = !{!24}
+// CHECK:STDOUT: !28 = distinct !DISubprogram(name: "__destroy_thunk", linkageName: "_C__destroy_thunk:thunk.A.Main", scope: null, file: !8, line: 8, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !31)
+// CHECK:STDOUT: !29 = !DILocalVariable(arg: 1, scope: !28, type: !10)
+// CHECK:STDOUT: !30 = !DILocation(line: 8, column: 1, scope: !28)
+// CHECK:STDOUT: !31 = !{!29}
+// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "Op", linkageName: "_COp.e649d414b9e7644a:core.Destroy.Core", scope: null, file: !8, line: 8, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !35)
+// CHECK:STDOUT: !33 = !DILocalVariable(arg: 1, scope: !32, type: !10)
+// CHECK:STDOUT: !34 = !DILocation(line: 8, column: 1, scope: !32)
+// CHECK:STDOUT: !35 = !{!33}
+// CHECK:STDOUT: !36 = distinct !DISubprogram(name: "__destroy_thunk", linkageName: "_C__destroy_thunk:thunk.B.Main", scope: null, file: !8, line: 13, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !39)
+// CHECK:STDOUT: !37 = !DILocalVariable(arg: 1, scope: !36, type: !10)
+// CHECK:STDOUT: !38 = !DILocation(line: 13, column: 1, scope: !36)
+// CHECK:STDOUT: !39 = !{!37}
+// CHECK:STDOUT: !40 = distinct !DISubprogram(name: "Op", linkageName: "_COp.535580a8a7a96b3b:core.Destroy.Core", scope: null, file: !8, line: 13, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !43)
+// CHECK:STDOUT: !41 = !DILocalVariable(arg: 1, scope: !40, type: !10)
+// CHECK:STDOUT: !42 = !DILocation(line: 13, column: 1, scope: !40)
+// CHECK:STDOUT: !43 = !{!41}
+// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "F__carbon_thunk.26f2099a79512a5d", linkageName: "_CF__carbon_thunk.26f2099a79512a5d.Main", scope: null, file: !8, line: 19, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !47)
+// CHECK:STDOUT: !45 = !DILocalVariable(arg: 1, scope: !44, type: !10)
+// CHECK:STDOUT: !46 = !DILocation(line: 19, column: 1, scope: !44)
+// CHECK:STDOUT: !47 = !{!45}
+// CHECK:STDOUT: !48 = distinct !DISubprogram(name: "F__carbon_thunk.7a3b9f04ddf4269e", linkageName: "_CF__carbon_thunk.7a3b9f04ddf4269e.Main", scope: null, file: !8, line: 19, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !51)
+// CHECK:STDOUT: !49 = !DILocalVariable(arg: 1, scope: !48, type: !10)
+// CHECK:STDOUT: !50 = !DILocation(line: 19, column: 1, scope: !48)
+// CHECK:STDOUT: !51 = !{!49}
+// CHECK:STDOUT: !52 = distinct !DISubprogram(name: "Run", linkageName: "main", scope: null, file: !8, line: 32, type: !15, spFlags: DISPFlagDefinition, unit: !9)
+// CHECK:STDOUT: !53 = !DILocation(line: 33, column: 3, scope: !52)
+// CHECK:STDOUT: !54 = !DILocation(line: 32, column: 1, scope: !52)
+// CHECK:STDOUT: !55 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.6662a1ffb773360a", scope: null, file: !8, line: 19, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !60)
+// CHECK:STDOUT: !56 = !DILocalVariable(arg: 1, scope: !55, type: !10)
+// CHECK:STDOUT: !58 = !DILocation(line: 20, column: 3, scope: !55)
+// CHECK:STDOUT: !59 = !DILocation(line: 19, column: 1, scope: !55)
+// CHECK:STDOUT: !60 = !{!56}
+// CHECK:STDOUT: !61 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.d53b17eed3ce903c", scope: null, file: !8, line: 19, type: !12, spFlags: DISPFlagDefinition, unit: !9, retainedNodes: !66)
+// CHECK:STDOUT: !62 = !DILocalVariable(arg: 1, scope: !61, type: !10)
+// CHECK:STDOUT: !64 = !DILocation(line: 20, column: 3, scope: !61)
+// CHECK:STDOUT: !65 = !DILocation(line: 19, column: 1, scope: !61)
+// CHECK:STDOUT: !66 = !{!62}
+// CHECK:STDOUT: !67 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !68 = !{!"omnipotent char", !67, i64 0}
+// CHECK:STDOUT: !69 = !{!"any pointer", !68, i64 0}
+// CHECK:STDOUT: !70 = !{!"p1 _ZTSN6Carbon1AE", !69, i64 0}
+// CHECK:STDOUT: !71 = !{!70, !70, i64 0}
+// CHECK:STDOUT: !72 = !{!"p1 _ZTSN6Carbon1BE", !69, i64 0}
+// CHECK:STDOUT: !73 = !{!72, !72, i64 0}
+// CHECK:STDOUT: !74 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !75 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !76 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !77 = !{!"int", !68, i64 0}
+// CHECK:STDOUT: !78 = !{!"__libc_errno", !77, i64 0}
+// CHECK:STDOUT: !79 = !{!78, !77, i64 0}
 // CHECK:STDOUT:
@@ -35,35 +35,35 @@ fn Run() {
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @main() #1 !dbg !12 {
+// CHECK:STDOUT: define i32 @main() #1 !dbg !25 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_ZN1N3RunEv(), !dbg !16
-// CHECK:STDOUT:   ret i32 0, !dbg !17
+// CHECK:STDOUT:   call void @_ZN1N3RunEv(), !dbg !26
+// CHECK:STDOUT:   ret i32 0, !dbg !27
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: attributes #0 = { 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 = { nounwind }
 // CHECK:STDOUT:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!19}
+// CHECK:STDOUT: !llvm.module.flags = !{!28, !29, !30, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!35}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "carbon_run.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "Run", linkageName: "main", scope: null, file: !1, line: 8, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{!15}
-// CHECK:STDOUT: !15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !16 = !DILocation(line: 9, column: 3, scope: !12)
-// CHECK:STDOUT: !17 = !DILocation(line: 8, column: 1, scope: !12)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !18 = !DIFile(filename: "carbon_run.carbon", directory: "")
+// CHECK:STDOUT: !19 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !18, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !20 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !21 = !{!20}
+// CHECK:STDOUT: !22 = !DISubroutineType(types: !21)
+// CHECK:STDOUT: !25 = distinct !DISubprogram(name: "Run", linkageName: "main", scope: null, file: !18, line: 8, type: !22, spFlags: DISPFlagDefinition, unit: !19)
+// CHECK:STDOUT: !26 = !DILocation(line: 9, column: 3, scope: !25)
+// CHECK:STDOUT: !27 = !DILocation(line: 8, column: 1, scope: !25)
+// CHECK:STDOUT: !28 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !29 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !30 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !31 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !32 = !{!"omnipotent char", !31, i64 0}
+// CHECK:STDOUT: !33 = !{!"int", !32, i64 0}
+// CHECK:STDOUT: !34 = !{!"__libc_errno", !33, i64 0}
+// CHECK:STDOUT: !35 = !{!34, !33, i64 0}
 // CHECK:STDOUT:
@@ -139,10 +139,10 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !22 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z3foov(), !dbg !15
-// CHECK:STDOUT:   ret void, !dbg !16
+// CHECK:STDOUT:   call void @_Z3foov(), !dbg !23
+// CHECK:STDOUT:   ret void, !dbg !24
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_Z3foov() #1
@@ -150,27 +150,27 @@ fn MyF() -> i32 {
 // 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:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!19}
+// CHECK:STDOUT: !llvm.module.flags = !{!25, !26, !27, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!32}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_function_decl.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "MyF", linkageName: "_CMyF.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 7, column: 3, scope: !12)
-// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 1, scope: !12)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !18 = !DIFile(filename: "import_function_decl.carbon", directory: "")
+// CHECK:STDOUT: !19 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !18, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !20 = !{null}
+// CHECK:STDOUT: !21 = !DISubroutineType(types: !20)
+// CHECK:STDOUT: !22 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !18, line: 6, type: !21, spFlags: DISPFlagDefinition, unit: !19)
+// CHECK:STDOUT: !23 = !DILocation(line: 7, column: 3, scope: !22)
+// CHECK:STDOUT: !24 = !DILocation(line: 6, column: 1, scope: !22)
+// CHECK:STDOUT: !25 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !26 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !27 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !28 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !29 = !{!"omnipotent char", !28, i64 0}
+// CHECK:STDOUT: !30 = !{!"int", !29, i64 0}
+// CHECK:STDOUT: !31 = !{!"__libc_errno", !30, i64 0}
+// CHECK:STDOUT: !32 = !{!31, !30, i64 0}
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'import_inline_function_decl.carbon'
@@ -181,10 +181,10 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: $_Z10foo_inlinev = comdat any
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !35 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z10foo_inlinev(), !dbg !15
-// CHECK:STDOUT:   ret void, !dbg !16
+// CHECK:STDOUT:   call void @_Z10foo_inlinev(), !dbg !36
+// CHECK:STDOUT:   ret void, !dbg !37
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
@@ -196,27 +196,27 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: attributes #0 = { nounwind }
 // 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:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!34}
+// CHECK:STDOUT: !llvm.module.flags = !{!25, !26, !27, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!32}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_inline_function_decl.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "MyF", linkageName: "_CMyF.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 7, column: 3, scope: !12)
-// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 1, scope: !12)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !20 = !{null}
+// CHECK:STDOUT: !21 = !DISubroutineType(types: !20)
+// CHECK:STDOUT: !25 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !26 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !27 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !28 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !29 = !{!"omnipotent char", !28, i64 0}
+// CHECK:STDOUT: !30 = !{!"int", !29, i64 0}
+// CHECK:STDOUT: !31 = !{!"__libc_errno", !30, i64 0}
+// CHECK:STDOUT: !32 = !{!31, !30, i64 0}
+// CHECK:STDOUT: !33 = !DIFile(filename: "import_inline_function_decl.carbon", directory: "")
+// CHECK:STDOUT: !34 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !33, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !35 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !33, line: 6, type: !21, spFlags: DISPFlagDefinition, unit: !34)
+// CHECK:STDOUT: !36 = !DILocation(line: 7, column: 3, scope: !35)
+// CHECK:STDOUT: !37 = !DILocation(line: 6, column: 1, scope: !35)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'import_inline_used_function_decl.carbon'
@@ -235,10 +235,10 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CMyF.Main() #1 !dbg !12 {
+// CHECK:STDOUT: define void @_CMyF.Main() #1 !dbg !40 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z8foo_usedv(), !dbg !15
-// CHECK:STDOUT:   ret void, !dbg !16
+// CHECK:STDOUT:   call void @_Z8foo_usedv(), !dbg !41
+// CHECK:STDOUT:   ret void, !dbg !42
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; uselistorder directives
@@ -247,27 +247,27 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: attributes #0 = { 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 #1 = { nounwind }
 // CHECK:STDOUT:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!39}
+// CHECK:STDOUT: !llvm.module.flags = !{!25, !26, !27, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!32}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_inline_used_function_decl.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "MyF", linkageName: "_CMyF.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 7, column: 3, scope: !12)
-// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 1, scope: !12)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !20 = !{null}
+// CHECK:STDOUT: !21 = !DISubroutineType(types: !20)
+// CHECK:STDOUT: !25 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !26 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !27 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !28 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !29 = !{!"omnipotent char", !28, i64 0}
+// CHECK:STDOUT: !30 = !{!"int", !29, i64 0}
+// CHECK:STDOUT: !31 = !{!"__libc_errno", !30, i64 0}
+// CHECK:STDOUT: !32 = !{!31, !30, i64 0}
+// CHECK:STDOUT: !38 = !DIFile(filename: "import_inline_used_function_decl.carbon", directory: "")
+// CHECK:STDOUT: !39 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !38, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !40 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !38, line: 6, type: !21, spFlags: DISPFlagDefinition, unit: !39)
+// CHECK:STDOUT: !41 = !DILocation(line: 7, column: 3, scope: !40)
+// CHECK:STDOUT: !42 = !DILocation(line: 6, column: 1, scope: !40)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'import_multiple_inline_function_decls.carbon'
@@ -282,12 +282,12 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: $_Z10multi_foo3v = comdat any
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !45 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z10multi_foo1v(), !dbg !15
-// CHECK:STDOUT:   call void @_Z10multi_foo2v(), !dbg !16
-// CHECK:STDOUT:   call void @_Z10multi_foo3v(), !dbg !17
-// CHECK:STDOUT:   ret void, !dbg !18
+// CHECK:STDOUT:   call void @_Z10multi_foo1v(), !dbg !46
+// CHECK:STDOUT:   call void @_Z10multi_foo2v(), !dbg !47
+// CHECK:STDOUT:   call void @_Z10multi_foo3v(), !dbg !48
+// CHECK:STDOUT:   ret void, !dbg !49
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
@@ -311,29 +311,29 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: attributes #0 = { nounwind }
 // 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:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!44}
+// CHECK:STDOUT: !llvm.module.flags = !{!25, !26, !27, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!32}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_multiple_inline_function_decls.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "MyF", linkageName: "_CMyF.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 7, column: 3, scope: !12)
-// CHECK:STDOUT: !16 = !DILocation(line: 8, column: 3, scope: !12)
-// CHECK:STDOUT: !17 = !DILocation(line: 9, column: 3, scope: !12)
-// CHECK:STDOUT: !18 = !DILocation(line: 6, column: 1, scope: !12)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !20 = !{null}
+// CHECK:STDOUT: !21 = !DISubroutineType(types: !20)
+// CHECK:STDOUT: !25 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !26 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !27 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !28 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !29 = !{!"omnipotent char", !28, i64 0}
+// CHECK:STDOUT: !30 = !{!"int", !29, i64 0}
+// CHECK:STDOUT: !31 = !{!"__libc_errno", !30, i64 0}
+// CHECK:STDOUT: !32 = !{!31, !30, i64 0}
+// CHECK:STDOUT: !43 = !DIFile(filename: "import_multiple_inline_function_decls.carbon", directory: "")
+// CHECK:STDOUT: !44 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !43, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !45 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !43, line: 6, type: !21, spFlags: DISPFlagDefinition, unit: !44)
+// CHECK:STDOUT: !46 = !DILocation(line: 7, column: 3, scope: !45)
+// CHECK:STDOUT: !47 = !DILocation(line: 8, column: 3, scope: !45)
+// CHECK:STDOUT: !48 = !DILocation(line: 9, column: 3, scope: !45)
+// CHECK:STDOUT: !49 = !DILocation(line: 6, column: 1, scope: !45)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'import_inline_recursive_function_decl.carbon'
@@ -346,10 +346,10 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: $_Z8rec_foo1v = comdat any
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !52 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z8rec_foo2v(), !dbg !15
-// CHECK:STDOUT:   ret void, !dbg !16
+// CHECK:STDOUT:   call void @_Z8rec_foo2v(), !dbg !53
+// CHECK:STDOUT:   ret void, !dbg !54
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress uwtable
@@ -369,27 +369,27 @@ fn MyF() -> i32 {
 // 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 = { 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:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!51}
+// CHECK:STDOUT: !llvm.module.flags = !{!25, !26, !27, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!32}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_inline_recursive_function_decl.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "MyF", linkageName: "_CMyF.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 8, column: 3, scope: !12)
-// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 1, scope: !12)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !20 = !{null}
+// CHECK:STDOUT: !21 = !DISubroutineType(types: !20)
+// CHECK:STDOUT: !25 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !26 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !27 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !28 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !29 = !{!"omnipotent char", !28, i64 0}
+// CHECK:STDOUT: !30 = !{!"int", !29, i64 0}
+// CHECK:STDOUT: !31 = !{!"__libc_errno", !30, i64 0}
+// CHECK:STDOUT: !32 = !{!31, !30, i64 0}
+// CHECK:STDOUT: !50 = !DIFile(filename: "import_inline_recursive_function_decl.carbon", directory: "")
+// CHECK:STDOUT: !51 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !50, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !52 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !50, line: 6, type: !21, spFlags: DISPFlagDefinition, unit: !51)
+// CHECK:STDOUT: !53 = !DILocation(line: 8, column: 3, scope: !52)
+// CHECK:STDOUT: !54 = !DILocation(line: 6, column: 1, scope: !52)
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'call_with_default_args.carbon'
@@ -398,22 +398,22 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CMyF.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define i32 @_CMyF.Main() #0 !dbg !68 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %value.var = alloca i32, align 4, !dbg !16
-// CHECK:STDOUT:   call void @_Z13NoReturnValueii.carbon_thunk.(), !dbg !17
-// CHECK:STDOUT:   call void @_Z13NoReturnValueii.carbon_thunk._(i32 3), !dbg !18
-// CHECK:STDOUT:   call void @_Z13NoReturnValueii(i32 3, i32 4), !dbg !19
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %value.var), !dbg !16
-// CHECK:STDOUT:   %SimpleReturnValue__carbon_thunk.call.loc11 = call i32 @_Z17SimpleReturnValueii.carbon_thunk.(), !dbg !20
-// CHECK:STDOUT:   store i32 %SimpleReturnValue__carbon_thunk.call.loc11, ptr %value.var, align 4, !dbg !16
-// CHECK:STDOUT:   %SimpleReturnValue__carbon_thunk.call.loc12 = call i32 @_Z17SimpleReturnValueii.carbon_thunk._(i32 3), !dbg !21
-// CHECK:STDOUT:   store i32 %SimpleReturnValue__carbon_thunk.call.loc12, ptr %value.var, align 4, !dbg !22
-// CHECK:STDOUT:   %SimpleReturnValue.call = call i32 @_Z17SimpleReturnValueii(i32 3, i32 4), !dbg !23
-// CHECK:STDOUT:   store i32 %SimpleReturnValue.call, ptr %value.var, align 4, !dbg !24
-// CHECK:STDOUT:   %.loc14 = load i32, ptr %value.var, align 4, !dbg !25
-// CHECK:STDOUT:   call void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %value.var), !dbg !16
-// CHECK:STDOUT:   ret i32 %.loc14, !dbg !26
+// CHECK:STDOUT:   %value.var = alloca i32, align 4, !dbg !74
+// CHECK:STDOUT:   call void @_Z13NoReturnValueii.carbon_thunk.(), !dbg !71
+// CHECK:STDOUT:   call void @_Z13NoReturnValueii.carbon_thunk._(i32 3), !dbg !72
+// CHECK:STDOUT:   call void @_Z13NoReturnValueii(i32 3, i32 4), !dbg !73
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %value.var), !dbg !74
+// CHECK:STDOUT:   %SimpleReturnValue__carbon_thunk.call.loc11 = call i32 @_Z17SimpleReturnValueii.carbon_thunk.(), !dbg !75
+// CHECK:STDOUT:   store i32 %SimpleReturnValue__carbon_thunk.call.loc11, ptr %value.var, align 4, !dbg !74
+// CHECK:STDOUT:   %SimpleReturnValue__carbon_thunk.call.loc12 = call i32 @_Z17SimpleReturnValueii.carbon_thunk._(i32 3), !dbg !78
+// CHECK:STDOUT:   store i32 %SimpleReturnValue__carbon_thunk.call.loc12, ptr %value.var, align 4, !dbg !77
+// CHECK:STDOUT:   %SimpleReturnValue.call = call i32 @_Z17SimpleReturnValueii(i32 3, i32 4), !dbg !80
+// CHECK:STDOUT:   store i32 %SimpleReturnValue.call, ptr %value.var, align 4, !dbg !79
+// CHECK:STDOUT:   %.loc14 = load i32, ptr %value.var, align 4, !dbg !81
+// CHECK:STDOUT:   call void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %value.var), !dbg !74
+// CHECK:STDOUT:   ret i32 %.loc14, !dbg !82
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
@@ -427,8 +427,8 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: define internal void @_Z13NoReturnValueii.carbon_thunk._(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 !27
-// CHECK:STDOUT:   %0 = load i32, ptr %a.addr, align 4, !tbaa !27
+// CHECK:STDOUT:   store i32 %a, ptr %a.addr, align 4, !tbaa !87
+// CHECK:STDOUT:   %0 = load i32, ptr %a.addr, align 4, !tbaa !87
 // CHECK:STDOUT:   call void @_Z13NoReturnValueii(i32 noundef %0, i32 noundef 2)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
@@ -446,8 +446,8 @@ fn MyF() -> i32 {
 // CHECK:STDOUT: define internal noundef i32 @_Z17SimpleReturnValueii.carbon_thunk._(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 !27
-// CHECK:STDOUT:   %0 = load i32, ptr %a.addr, align 4, !tbaa !27
+// CHECK:STDOUT:   store i32 %a, ptr %a.addr, align 4, !tbaa !87
+// CHECK:STDOUT:   %0 = load i32, ptr %a.addr, align 4, !tbaa !87
 // CHECK:STDOUT:   %call = call noundef i32 @_Z17SimpleReturnValueii(i32 noundef %0, i32 noundef 2)
 // CHECK:STDOUT:   ret i32 %call
 // CHECK:STDOUT: }
@@ -455,9 +455,9 @@ fn MyF() -> i32 {
 // 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.70db2d92ffddbef7:core.Destroy.Core"(ptr %self) #0 !dbg !28 {
+// CHECK:STDOUT: define weak_odr void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %self) #0 !dbg !83 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !33
+// CHECK:STDOUT:   ret void, !dbg !85
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
@@ -472,42 +472,42 @@ fn MyF() -> i32 {
 // 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.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!56}
+// CHECK:STDOUT: !llvm.module.flags = !{!25, !26, !27, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!32}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "call_with_default_args.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "MyF", linkageName: "_CMyF.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{!15}
-// CHECK:STDOUT: !15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !16 = !DILocation(line: 11, column: 3, scope: !12)
-// CHECK:STDOUT: !17 = !DILocation(line: 7, column: 3, scope: !12)
-// CHECK:STDOUT: !18 = !DILocation(line: 8, column: 3, scope: !12)
-// CHECK:STDOUT: !19 = !DILocation(line: 9, column: 3, scope: !12)
-// CHECK:STDOUT: !20 = !DILocation(line: 11, column: 20, scope: !12)
-// CHECK:STDOUT: !21 = !DILocation(line: 12, column: 11, scope: !12)
-// CHECK:STDOUT: !22 = !DILocation(line: 12, column: 3, scope: !12)
-// CHECK:STDOUT: !23 = !DILocation(line: 13, column: 11, scope: !12)
-// CHECK:STDOUT: !24 = !DILocation(line: 13, column: 3, scope: !12)
-// CHECK:STDOUT: !25 = !DILocation(line: 14, column: 10, scope: !12)
-// CHECK:STDOUT: !26 = !DILocation(line: 14, column: 3, scope: !12)
-// CHECK:STDOUT: !27 = !{!9, !9, i64 0}
-// CHECK:STDOUT: !28 = distinct !DISubprogram(name: "Op", linkageName: "_COp.70db2d92ffddbef7:core.Destroy.Core", scope: null, file: !1, line: 11, type: !29, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !31)
-// CHECK:STDOUT: !29 = !DISubroutineType(types: !30)
-// CHECK:STDOUT: !30 = !{null, !15}
-// CHECK:STDOUT: !31 = !{!32}
-// CHECK:STDOUT: !32 = !DILocalVariable(arg: 1, scope: !28, type: !15)
-// CHECK:STDOUT: !33 = !DILocation(line: 11, column: 3, scope: !28)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !25 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !26 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !27 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !28 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !29 = !{!"omnipotent char", !28, i64 0}
+// CHECK:STDOUT: !30 = !{!"int", !29, i64 0}
+// CHECK:STDOUT: !31 = !{!"__libc_errno", !30, i64 0}
+// CHECK:STDOUT: !32 = !{!31, !30, i64 0}
+// CHECK:STDOUT: !55 = !DIFile(filename: "call_with_default_args.carbon", directory: "")
+// CHECK:STDOUT: !56 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !55, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !57 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !58 = !{!57}
+// CHECK:STDOUT: !59 = !DISubroutineType(types: !58)
+// CHECK:STDOUT: !60 = !{null, !57}
+// CHECK:STDOUT: !61 = !DISubroutineType(types: !60)
+// CHECK:STDOUT: !68 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !55, line: 6, type: !59, spFlags: DISPFlagDefinition, unit: !56)
+// CHECK:STDOUT: !71 = !DILocation(line: 7, column: 3, scope: !68)
+// CHECK:STDOUT: !72 = !DILocation(line: 8, column: 3, scope: !68)
+// CHECK:STDOUT: !73 = !DILocation(line: 9, column: 3, scope: !68)
+// CHECK:STDOUT: !74 = !DILocation(line: 11, column: 3, scope: !68)
+// CHECK:STDOUT: !75 = !DILocation(line: 11, column: 20, scope: !68)
+// CHECK:STDOUT: !77 = !DILocation(line: 12, column: 3, scope: !68)
+// CHECK:STDOUT: !78 = !DILocation(line: 12, column: 11, scope: !68)
+// CHECK:STDOUT: !79 = !DILocation(line: 13, column: 3, scope: !68)
+// CHECK:STDOUT: !80 = !DILocation(line: 13, column: 11, scope: !68)
+// CHECK:STDOUT: !81 = !DILocation(line: 14, column: 10, scope: !68)
+// CHECK:STDOUT: !82 = !DILocation(line: 14, column: 3, scope: !68)
+// CHECK:STDOUT: !83 = distinct !DISubprogram(name: "Op", linkageName: "_COp.70db2d92ffddbef7:core.Destroy.Core", scope: null, file: !55, line: 11, type: !61, spFlags: DISPFlagDefinition, unit: !56, retainedNodes: !86)
+// CHECK:STDOUT: !84 = !DILocalVariable(arg: 1, scope: !83, type: !57)
+// CHECK:STDOUT: !85 = !DILocation(line: 11, column: 3, scope: !83)
+// CHECK:STDOUT: !86 = !{!84}
+// CHECK:STDOUT: !87 = !{!30, !30, i64 0}
 // CHECK:STDOUT:
@@ -39,43 +39,43 @@ fn F() {
 // CHECK:STDOUT: $_ZN1XIiE1fEi = comdat any
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !25 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_ZN1XIiE1fEi(i32 42), !dbg !15
-// CHECK:STDOUT:   ret void, !dbg !16
+// CHECK:STDOUT:   call void @_ZN1XIiE1fEi(i32 42), !dbg !26
+// CHECK:STDOUT:   ret void, !dbg !27
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
 // CHECK:STDOUT: define linkonce_odr dso_local void @_ZN1XIiE1fEi(i32 noundef %t) #1 comdat align 2 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %t.addr = alloca i32, align 4
-// CHECK:STDOUT:   store i32 %t, ptr %t.addr, align 4, !tbaa !17
+// CHECK:STDOUT:   store i32 %t, ptr %t.addr, align 4, !tbaa !31
 // 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:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!19}
+// CHECK:STDOUT: !llvm.module.flags = !{!32, !33, !34, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!36}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "use_class_template.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "F", linkageName: "_CF.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 8, column: 3, scope: !12)
-// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 1, scope: !12)
-// CHECK:STDOUT: !17 = !{!9, !9, i64 0}
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !18 = !DIFile(filename: "use_class_template.carbon", directory: "")
+// CHECK:STDOUT: !19 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !18, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !21 = !{null}
+// CHECK:STDOUT: !22 = !DISubroutineType(types: !21)
+// CHECK:STDOUT: !25 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !18, line: 6, type: !22, spFlags: DISPFlagDefinition, unit: !19)
+// CHECK:STDOUT: !26 = !DILocation(line: 8, column: 3, scope: !25)
+// CHECK:STDOUT: !27 = !DILocation(line: 6, column: 1, scope: !25)
+// CHECK:STDOUT: !28 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !29 = !{!"omnipotent char", !28, i64 0}
+// CHECK:STDOUT: !30 = !{!"int", !29, i64 0}
+// CHECK:STDOUT: !31 = !{!30, !30, i64 0}
+// CHECK:STDOUT: !32 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !33 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !34 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !35 = !{!"__libc_errno", !30, i64 0}
+// CHECK:STDOUT: !36 = !{!35, !30, i64 0}
 // CHECK:STDOUT:
@@ -34,28 +34,28 @@ fn Call() -> i32 {
 // CHECK:STDOUT: define dso_local void @_Z1FPi(ptr noundef %p) #0 {
 // CHECK:STDOUT: entry:
 // CHECK:STDOUT:   %p.addr = alloca ptr, align 8
-// CHECK:STDOUT:   store ptr %p, ptr %p.addr, align 8, !tbaa !12
-// CHECK:STDOUT:   %0 = load ptr, ptr %p.addr, align 8, !tbaa !12
-// CHECK:STDOUT:   store i32 1, ptr %0, align 4, !tbaa !15
+// CHECK:STDOUT:   store ptr %p, ptr %p.addr, align 8, !tbaa !5
+// CHECK:STDOUT:   %0 = load ptr, ptr %p.addr, align 8, !tbaa !5
+// CHECK:STDOUT:   store i32 1, ptr %0, align 4, !tbaa !6
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CCall.Main() #1 !dbg !16 {
+// CHECK:STDOUT: define i32 @_CCall.Main() #1 !dbg !35 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %n.var = alloca i32, align 4, !dbg !20
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !20
-// CHECK:STDOUT:   store i32 0, ptr %n.var, align 4, !dbg !20
-// CHECK:STDOUT:   call void @_Z1FPi(ptr %n.var), !dbg !21
-// CHECK:STDOUT:   %.loc24 = load i32, ptr %n.var, align 4, !dbg !22
-// CHECK:STDOUT:   call void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %n.var), !dbg !20
-// CHECK:STDOUT:   ret i32 %.loc24, !dbg !23
+// CHECK:STDOUT:   %n.var = alloca i32, align 4, !dbg !38
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !38
+// CHECK:STDOUT:   store i32 0, ptr %n.var, align 4, !dbg !38
+// CHECK:STDOUT:   call void @_Z1FPi(ptr %n.var), !dbg !42
+// CHECK:STDOUT:   %.loc24 = load i32, ptr %n.var, align 4, !dbg !43
+// CHECK:STDOUT:   call void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %n.var), !dbg !38
+// CHECK:STDOUT:   ret i32 %.loc24, !dbg !44
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %self) #1 !dbg !24 {
+// CHECK:STDOUT: define weak_odr void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %self) #1 !dbg !45 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !29
+// CHECK:STDOUT:   ret void, !dbg !47
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
@@ -65,38 +65,38 @@ fn Call() -> i32 {
 // CHECK:STDOUT: attributes #1 = { nounwind }
 // CHECK:STDOUT: attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 // CHECK:STDOUT:
-// CHECK:STDOUT: !llvm.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!26}
+// CHECK:STDOUT: !llvm.module.flags = !{!49, !50, !51, !9, !10}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!53}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_inline.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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 int", !14, i64 0}
-// CHECK:STDOUT: !14 = !{!"any pointer", !10, i64 0}
-// CHECK:STDOUT: !15 = !{!9, !9, i64 0}
-// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !1, line: 21, type: !17, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !17 = !DISubroutineType(types: !18)
-// CHECK:STDOUT: !18 = !{!19}
-// CHECK:STDOUT: !19 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !20 = !DILocation(line: 22, column: 3, scope: !16)
-// CHECK:STDOUT: !21 = !DILocation(line: 23, column: 3, scope: !16)
-// CHECK:STDOUT: !22 = !DILocation(line: 24, column: 10, scope: !16)
-// CHECK:STDOUT: !23 = !DILocation(line: 24, column: 3, scope: !16)
-// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "Op", linkageName: "_COp.70db2d92ffddbef7:core.Destroy.Core", scope: null, file: !1, line: 22, type: !25, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !27)
-// CHECK:STDOUT: !25 = !DISubroutineType(types: !26)
-// CHECK:STDOUT: !26 = !{null, !19}
-// CHECK:STDOUT: !27 = !{!28}
-// CHECK:STDOUT: !28 = !DILocalVariable(arg: 1, scope: !24, type: !19)
-// CHECK:STDOUT: !29 = !DILocation(line: 22, column: 3, scope: !24)
+// CHECK:STDOUT: !0 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !1 = !{!"omnipotent char", !0, i64 0}
+// CHECK:STDOUT: !2 = !{!"int", !1, i64 0}
+// CHECK:STDOUT: !3 = !{!"any pointer", !1, i64 0}
+// CHECK:STDOUT: !4 = !{!"p1 int", !3, i64 0}
+// CHECK:STDOUT: !5 = !{!4, !4, i64 0}
+// CHECK:STDOUT: !6 = !{!2, !2, i64 0}
+// CHECK:STDOUT: !9 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !10 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !25 = !DIFile(filename: "import_inline.carbon", directory: "")
+// CHECK:STDOUT: !26 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !25, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !27 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !28 = !{!27}
+// CHECK:STDOUT: !29 = !DISubroutineType(types: !28)
+// CHECK:STDOUT: !33 = !{null, !27}
+// CHECK:STDOUT: !34 = !DISubroutineType(types: !33)
+// CHECK:STDOUT: !35 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !25, line: 21, type: !29, spFlags: DISPFlagDefinition, unit: !26)
+// CHECK:STDOUT: !38 = !DILocation(line: 22, column: 3, scope: !35)
+// CHECK:STDOUT: !42 = !DILocation(line: 23, column: 3, scope: !35)
+// CHECK:STDOUT: !43 = !DILocation(line: 24, column: 10, scope: !35)
+// CHECK:STDOUT: !44 = !DILocation(line: 24, column: 3, scope: !35)
+// CHECK:STDOUT: !45 = distinct !DISubprogram(name: "Op", linkageName: "_COp.70db2d92ffddbef7:core.Destroy.Core", scope: null, file: !25, line: 22, type: !34, spFlags: DISPFlagDefinition, unit: !26, retainedNodes: !48)
+// CHECK:STDOUT: !46 = !DILocalVariable(arg: 1, scope: !45, type: !27)
+// CHECK:STDOUT: !47 = !DILocation(line: 22, column: 3, scope: !45)
+// CHECK:STDOUT: !48 = !{!46}
+// CHECK:STDOUT: !49 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !50 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !51 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !52 = !{!"__libc_errno", !2, i64 0}
+// CHECK:STDOUT: !53 = !{!52, !2, i64 0}
 // CHECK:STDOUT:
@@ -122,23 +122,23 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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 !12 {
+// CHECK:STDOUT: define void @_CMyF.Main() #0 !dbg !61 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc7_19.3.temp = alloca i8, align 1, !dbg !15
-// CHECK:STDOUT:   %.loc7_22.3.temp = alloca i16, align 2, !dbg !16
-// CHECK:STDOUT:   %.loc9_21.3.temp = alloca i8, align 1, !dbg !17
-// CHECK:STDOUT:   %.loc9_24.3.temp = alloca i16, align 2, !dbg !18
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_19.3.temp), !dbg !15
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_22.3.temp), !dbg !16
-// CHECK:STDOUT:   call void @_Z11pass_signedasil.carbon_thunk.____(ptr @int_1.f1e, ptr @int_2.5c2, i32 3, i64 4), !dbg !19
-// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr @int_2.5c2), !dbg !16
-// CHECK:STDOUT:   call void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr @int_1.f1e), !dbg !15
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_21.3.temp), !dbg !17
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_24.3.temp), !dbg !18
-// CHECK:STDOUT:   call void @_Z13pass_unsignedhtjm.carbon_thunk.____(ptr @int_1.067, ptr @int_2.ec3, i32 3, i64 4), !dbg !20
-// CHECK:STDOUT:   call void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr @int_2.ec3), !dbg !18
-// CHECK:STDOUT:   call void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr @int_1.067), !dbg !17
-// CHECK:STDOUT:   ret void, !dbg !21
+// CHECK:STDOUT:   %.loc7_19.3.temp = alloca i8, align 1, !dbg !62
+// CHECK:STDOUT:   %.loc7_22.3.temp = alloca i16, align 2, !dbg !63
+// CHECK:STDOUT:   %.loc9_21.3.temp = alloca i8, align 1, !dbg !65
+// CHECK:STDOUT:   %.loc9_24.3.temp = alloca i16, align 2, !dbg !66
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_19.3.temp), !dbg !62
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_22.3.temp), !dbg !63
+// CHECK:STDOUT:   call void @_Z11pass_signedasil.carbon_thunk.____(ptr @int_1.f1e, ptr @int_2.5c2, i32 3, i64 4), !dbg !64
+// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr @int_2.5c2), !dbg !63
+// CHECK:STDOUT:   call void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr @int_1.f1e), !dbg !62
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_21.3.temp), !dbg !65
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_24.3.temp), !dbg !66
+// CHECK:STDOUT:   call void @_Z13pass_unsignedhtjm.carbon_thunk.____(ptr @int_1.067, ptr @int_2.ec3, i32 3, i64 4), !dbg !67
+// CHECK:STDOUT:   call void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr @int_2.ec3), !dbg !66
+// CHECK:STDOUT:   call void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr @int_1.067), !dbg !65
+// CHECK:STDOUT:   ret void, !dbg !68
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
@@ -148,30 +148,30 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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 !22
-// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !25
-// CHECK:STDOUT:   store i32 %2, ptr %.addr2, align 4, !tbaa !27
-// CHECK:STDOUT:   store i64 %3, ptr %.addr3, align 8, !tbaa !28
-// CHECK:STDOUT:   %4 = load ptr, ptr %.addr, align 8, !tbaa !22
-// CHECK:STDOUT:   %5 = load i8, ptr %4, align 1, !tbaa !30
-// CHECK:STDOUT:   %6 = load ptr, ptr %.addr1, align 8, !tbaa !25
-// CHECK:STDOUT:   %7 = load i16, ptr %6, align 2, !tbaa !31
-// CHECK:STDOUT:   %8 = load i32, ptr %.addr2, align 4, !tbaa !27
-// CHECK:STDOUT:   %9 = load i64, ptr %.addr3, align 8, !tbaa !28
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !108
+// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !111
+// CHECK:STDOUT:   store i32 %2, ptr %.addr2, align 4, !tbaa !113
+// CHECK:STDOUT:   store i64 %3, ptr %.addr3, align 8, !tbaa !115
+// CHECK:STDOUT:   %4 = load ptr, ptr %.addr, align 8, !tbaa !108
+// CHECK:STDOUT:   %5 = load i8, ptr %4, align 1, !tbaa !116
+// CHECK:STDOUT:   %6 = load ptr, ptr %.addr1, align 8, !tbaa !111
+// CHECK:STDOUT:   %7 = load i16, ptr %6, align 2, !tbaa !117
+// CHECK:STDOUT:   %8 = load i32, ptr %.addr2, align 4, !tbaa !113
+// CHECK:STDOUT:   %9 = load i64, ptr %.addr3, align 8, !tbaa !115
 // 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: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %self) #0 !dbg !33 {
+// CHECK:STDOUT: define weak_odr void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %self) #0 !dbg !69 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !39
+// CHECK:STDOUT:   ret void, !dbg !71
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr %self) #0 !dbg !40 {
+// CHECK:STDOUT: define weak_odr void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr %self) #0 !dbg !73 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !46
+// CHECK:STDOUT:   ret void, !dbg !75
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
@@ -181,70 +181,70 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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 !22
-// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !25
-// CHECK:STDOUT:   store i32 %2, ptr %.addr2, align 4, !tbaa !27
-// CHECK:STDOUT:   store i64 %3, ptr %.addr3, align 8, !tbaa !28
-// CHECK:STDOUT:   %4 = load ptr, ptr %.addr, align 8, !tbaa !22
-// CHECK:STDOUT:   %5 = load i8, ptr %4, align 1, !tbaa !30
-// CHECK:STDOUT:   %6 = load ptr, ptr %.addr1, align 8, !tbaa !25
-// CHECK:STDOUT:   %7 = load i16, ptr %6, align 2, !tbaa !31
-// CHECK:STDOUT:   %8 = load i32, ptr %.addr2, align 4, !tbaa !27
-// CHECK:STDOUT:   %9 = load i64, ptr %.addr3, align 8, !tbaa !28
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !108
+// CHECK:STDOUT:   store ptr %1, ptr %.addr1, align 8, !tbaa !111
+// CHECK:STDOUT:   store i32 %2, ptr %.addr2, align 4, !tbaa !113
+// CHECK:STDOUT:   store i64 %3, ptr %.addr3, align 8, !tbaa !115
+// CHECK:STDOUT:   %4 = load ptr, ptr %.addr, align 8, !tbaa !108
+// CHECK:STDOUT:   %5 = load i8, ptr %4, align 1, !tbaa !116
+// CHECK:STDOUT:   %6 = load ptr, ptr %.addr1, align 8, !tbaa !111
+// CHECK:STDOUT:   %7 = load i16, ptr %6, align 2, !tbaa !117
+// CHECK:STDOUT:   %8 = load i32, ptr %.addr2, align 4, !tbaa !113
+// CHECK:STDOUT:   %9 = load i64, ptr %.addr3, align 8, !tbaa !115
 // 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: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr %self) #0 !dbg !47 {
+// CHECK:STDOUT: define weak_odr void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr %self) #0 !dbg !77 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !53
+// CHECK:STDOUT:   ret void, !dbg !79
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr %self) #0 !dbg !54 {
+// CHECK:STDOUT: define weak_odr void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr %self) #0 !dbg !81 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !60
+// CHECK:STDOUT:   ret void, !dbg !83
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare i16 @_CMakeShort.Main()
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassShort.Main(i16 %a, ptr %b) #0 !dbg !61 {
+// CHECK:STDOUT: define void @_CPassShort.Main(i16 %a, ptr %b) #0 !dbg !85 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc17_18.1.temp = alloca i16, align 2, !dbg !68
-// CHECK:STDOUT:   %.loc18_18.3.temp = alloca i16, align 2, !dbg !69
-// CHECK:STDOUT:   %.loc19_18.2.temp = alloca i16, align 2, !dbg !70
-// CHECK:STDOUT:   %.loc20_28.3.temp = alloca i16, align 2, !dbg !71
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc17_18.1.temp), !dbg !68
-// CHECK:STDOUT:   store i16 %a, ptr %.loc17_18.1.temp, align 2, !dbg !68
-// CHECK:STDOUT:   call void @_Z10pass_shorts.carbon_thunk._(ptr %.loc17_18.1.temp), !dbg !72
-// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc17_18.1.temp), !dbg !68
-// CHECK:STDOUT:   %.loc18_18.2 = load i16, ptr %b, align 2, !dbg !69
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_18.3.temp), !dbg !69
-// CHECK:STDOUT:   store i16 %.loc18_18.2, ptr %.loc18_18.3.temp, align 2, !dbg !69
-// CHECK:STDOUT:   call void @_Z10pass_shorts.carbon_thunk._(ptr %.loc18_18.3.temp), !dbg !73
-// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc18_18.3.temp), !dbg !69
-// CHECK:STDOUT:   %.loc19_18.1 = load i16, ptr @_Cc.Main, align 2, !dbg !70
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc19_18.2.temp), !dbg !70
-// CHECK:STDOUT:   store i16 %.loc19_18.1, ptr %.loc19_18.2.temp, align 2, !dbg !70
-// CHECK:STDOUT:   call void @_Z10pass_shorts.carbon_thunk._(ptr %.loc19_18.2.temp), !dbg !74
-// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc19_18.2.temp), !dbg !70
-// CHECK:STDOUT:   %MakeShort.call = call i16 @_CMakeShort.Main(), !dbg !71
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc20_28.3.temp), !dbg !71
-// CHECK:STDOUT:   store i16 %MakeShort.call, ptr %.loc20_28.3.temp, align 2, !dbg !71
-// CHECK:STDOUT:   call void @_Z10pass_shorts.carbon_thunk._(ptr %.loc20_28.3.temp), !dbg !75
-// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc20_28.3.temp), !dbg !71
-// CHECK:STDOUT:   ret void, !dbg !76
+// CHECK:STDOUT:   %.loc17_18.1.temp = alloca i16, align 2, !dbg !90
+// CHECK:STDOUT:   %.loc18_18.3.temp = alloca i16, align 2, !dbg !93
+// CHECK:STDOUT:   %.loc19_18.2.temp = alloca i16, align 2, !dbg !95
+// CHECK:STDOUT:   %.loc20_28.3.temp = alloca i16, align 2, !dbg !97
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc17_18.1.temp), !dbg !90
+// CHECK:STDOUT:   store i16 %a, ptr %.loc17_18.1.temp, align 2, !dbg !90
+// CHECK:STDOUT:   call void @_Z10pass_shorts.carbon_thunk._(ptr %.loc17_18.1.temp), !dbg !91
+// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc17_18.1.temp), !dbg !90
+// CHECK:STDOUT:   %.loc18_18.2 = load i16, ptr %b, align 2, !dbg !93
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc18_18.3.temp), !dbg !93
+// CHECK:STDOUT:   store i16 %.loc18_18.2, ptr %.loc18_18.3.temp, align 2, !dbg !93
+// CHECK:STDOUT:   call void @_Z10pass_shorts.carbon_thunk._(ptr %.loc18_18.3.temp), !dbg !94
+// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc18_18.3.temp), !dbg !93
+// CHECK:STDOUT:   %.loc19_18.1 = load i16, ptr @_Cc.Main, align 2, !dbg !95
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc19_18.2.temp), !dbg !95
+// CHECK:STDOUT:   store i16 %.loc19_18.1, ptr %.loc19_18.2.temp, align 2, !dbg !95
+// CHECK:STDOUT:   call void @_Z10pass_shorts.carbon_thunk._(ptr %.loc19_18.2.temp), !dbg !96
+// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc19_18.2.temp), !dbg !95
+// CHECK:STDOUT:   %MakeShort.call = call i16 @_CMakeShort.Main(), !dbg !97
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc20_28.3.temp), !dbg !97
+// CHECK:STDOUT:   store i16 %MakeShort.call, ptr %.loc20_28.3.temp, align 2, !dbg !97
+// CHECK:STDOUT:   call void @_Z10pass_shorts.carbon_thunk._(ptr %.loc20_28.3.temp), !dbg !98
+// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc20_28.3.temp), !dbg !97
+// CHECK:STDOUT:   ret void, !dbg !99
 // 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 !25
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !25
-// CHECK:STDOUT:   %2 = load i16, ptr %1, align 2, !tbaa !31
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !111
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !111
+// CHECK:STDOUT:   %2 = load i16, ptr %1, align 2, !tbaa !117
 // CHECK:STDOUT:   call void @_Z10pass_shorts(i16 noundef signext %2)
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
@@ -253,10 +253,10 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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() #0 !dbg !77 {
+// CHECK:STDOUT: define internal void @_C__global_init.Main() #0 !dbg !101 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   store i16 poison, ptr @_Cc.Main, align 2, !dbg !78
-// CHECK:STDOUT:   ret void, !dbg !79
+// CHECK:STDOUT:   store i16 poison, ptr @_Cc.Main, align 2, !dbg !102
+// CHECK:STDOUT:   ret void, !dbg !103
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_Z11pass_signedasil(i8 noundef signext, i16 noundef signext, i32 noundef, i64 noundef) #3
@@ -274,90 +274,90 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!33}
+// CHECK:STDOUT: !llvm.module.flags = !{!118, !119, !120, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!122}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_ints.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "MyF", linkageName: "_CMyF.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 7, column: 19, scope: !12)
-// CHECK:STDOUT: !16 = !DILocation(line: 7, column: 22, scope: !12)
-// CHECK:STDOUT: !17 = !DILocation(line: 9, column: 21, scope: !12)
-// CHECK:STDOUT: !18 = !DILocation(line: 9, column: 24, scope: !12)
-// CHECK:STDOUT: !19 = !DILocation(line: 7, column: 3, scope: !12)
-// CHECK:STDOUT: !20 = !DILocation(line: 9, column: 3, scope: !12)
-// CHECK:STDOUT: !21 = !DILocation(line: 6, column: 1, scope: !12)
-// CHECK:STDOUT: !22 = !{!23, !23, i64 0}
-// CHECK:STDOUT: !23 = !{!"p1 omnipotent char", !24, i64 0}
-// CHECK:STDOUT: !24 = !{!"any pointer", !10, i64 0}
-// CHECK:STDOUT: !25 = !{!26, !26, i64 0}
-// CHECK:STDOUT: !26 = !{!"p1 short", !24, i64 0}
-// CHECK:STDOUT: !27 = !{!9, !9, i64 0}
-// CHECK:STDOUT: !28 = !{!29, !29, i64 0}
-// CHECK:STDOUT: !29 = !{!"long", !10, i64 0}
-// CHECK:STDOUT: !30 = !{!10, !10, i64 0}
-// CHECK:STDOUT: !31 = !{!32, !32, i64 0}
-// CHECK:STDOUT: !32 = !{!"short", !10, i64 0}
-// CHECK:STDOUT: !33 = distinct !DISubprogram(name: "Op", linkageName: "_COp.91f16365ca65525e:core.Destroy.Core", scope: null, file: !1, line: 7, type: !34, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !37)
-// CHECK:STDOUT: !34 = !DISubroutineType(types: !35)
-// CHECK:STDOUT: !35 = !{null, !36}
-// CHECK:STDOUT: !36 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !37 = !{!38}
-// CHECK:STDOUT: !38 = !DILocalVariable(arg: 1, scope: !33, type: !36)
-// CHECK:STDOUT: !39 = !DILocation(line: 7, column: 22, scope: !33)
-// CHECK:STDOUT: !40 = distinct !DISubprogram(name: "Op", linkageName: "_COp.136cbc434fe80552:core.Destroy.Core", scope: null, file: !1, line: 7, type: !41, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !44)
-// CHECK:STDOUT: !41 = !DISubroutineType(types: !42)
-// CHECK:STDOUT: !42 = !{null, !43}
-// CHECK:STDOUT: !43 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !44 = !{!45}
-// CHECK:STDOUT: !45 = !DILocalVariable(arg: 1, scope: !40, type: !43)
-// CHECK:STDOUT: !46 = !DILocation(line: 7, column: 19, scope: !40)
-// CHECK:STDOUT: !47 = distinct !DISubprogram(name: "Op", linkageName: "_COp.d38552e658b9d7ce:core.Destroy.Core", scope: null, file: !1, line: 9, type: !48, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !51)
-// CHECK:STDOUT: !48 = !DISubroutineType(types: !49)
-// CHECK:STDOUT: !49 = !{null, !50}
-// CHECK:STDOUT: !50 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_unsigned)
-// CHECK:STDOUT: !51 = !{!52}
-// CHECK:STDOUT: !52 = !DILocalVariable(arg: 1, scope: !47, type: !50)
-// CHECK:STDOUT: !53 = !DILocation(line: 9, column: 24, scope: !47)
-// CHECK:STDOUT: !54 = distinct !DISubprogram(name: "Op", linkageName: "_COp.becc1452ae1d9d7b:core.Destroy.Core", scope: null, file: !1, line: 9, type: !55, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !58)
-// CHECK:STDOUT: !55 = !DISubroutineType(types: !56)
-// CHECK:STDOUT: !56 = !{null, !57}
-// CHECK:STDOUT: !57 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_unsigned)
-// CHECK:STDOUT: !58 = !{!59}
-// CHECK:STDOUT: !59 = !DILocalVariable(arg: 1, scope: !54, type: !57)
-// CHECK:STDOUT: !60 = !DILocation(line: 9, column: 21, scope: !54)
-// CHECK:STDOUT: !61 = distinct !DISubprogram(name: "PassShort", linkageName: "_CPassShort.Main", scope: null, file: !1, line: 16, type: !62, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !65)
-// CHECK:STDOUT: !62 = !DISubroutineType(types: !63)
-// CHECK:STDOUT: !63 = !{null, !36, !64}
-// CHECK:STDOUT: !64 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !65 = !{!66, !67}
-// CHECK:STDOUT: !66 = !DILocalVariable(arg: 1, scope: !61, type: !36)
-// CHECK:STDOUT: !67 = !DILocalVariable(arg: 2, scope: !61, type: !64)
-// CHECK:STDOUT: !68 = !DILocation(line: 17, column: 18, scope: !61)
-// CHECK:STDOUT: !69 = !DILocation(line: 18, column: 18, scope: !61)
-// CHECK:STDOUT: !70 = !DILocation(line: 19, column: 18, scope: !61)
-// CHECK:STDOUT: !71 = !DILocation(line: 20, column: 18, scope: !61)
-// CHECK:STDOUT: !72 = !DILocation(line: 17, column: 3, scope: !61)
-// CHECK:STDOUT: !73 = !DILocation(line: 18, column: 3, scope: !61)
-// CHECK:STDOUT: !74 = !DILocation(line: 19, column: 3, scope: !61)
-// CHECK:STDOUT: !75 = !DILocation(line: 20, column: 3, scope: !61)
-// CHECK:STDOUT: !76 = !DILocation(line: 16, column: 1, scope: !61)
-// CHECK:STDOUT: !77 = distinct !DISubprogram(name: "__global_init", linkageName: "_C__global_init.Main", scope: null, file: !1, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !78 = !DILocation(line: 14, column: 1, scope: !77)
-// CHECK:STDOUT: !79 = !DILocation(line: 0, scope: !77)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !8 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_unsigned)
+// CHECK:STDOUT: !32 = !DIFile(filename: "import_ints.carbon", directory: "")
+// CHECK:STDOUT: !33 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !32, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !36 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !37 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !39 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_unsigned)
+// CHECK:STDOUT: !40 = !{null}
+// CHECK:STDOUT: !41 = !DISubroutineType(types: !40)
+// CHECK:STDOUT: !42 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !45 = !{null, !37}
+// CHECK:STDOUT: !46 = !DISubroutineType(types: !45)
+// CHECK:STDOUT: !47 = !{null, !36}
+// CHECK:STDOUT: !48 = !DISubroutineType(types: !47)
+// CHECK:STDOUT: !51 = !{null, !39}
+// CHECK:STDOUT: !52 = !DISubroutineType(types: !51)
+// CHECK:STDOUT: !53 = !{null, !8}
+// CHECK:STDOUT: !54 = !DISubroutineType(types: !53)
+// CHECK:STDOUT: !57 = !{null, !37, !42}
+// CHECK:STDOUT: !58 = !DISubroutineType(types: !57)
+// CHECK:STDOUT: !61 = distinct !DISubprogram(name: "MyF", linkageName: "_CMyF.Main", scope: null, file: !32, line: 6, type: !41, spFlags: DISPFlagDefinition, unit: !33)
+// CHECK:STDOUT: !62 = !DILocation(line: 7, column: 19, scope: !61)
+// CHECK:STDOUT: !63 = !DILocation(line: 7, column: 22, scope: !61)
+// CHECK:STDOUT: !64 = !DILocation(line: 7, column: 3, scope: !61)
+// CHECK:STDOUT: !65 = !DILocation(line: 9, column: 21, scope: !61)
+// CHECK:STDOUT: !66 = !DILocation(line: 9, column: 24, scope: !61)
+// CHECK:STDOUT: !67 = !DILocation(line: 9, column: 3, scope: !61)
+// CHECK:STDOUT: !68 = !DILocation(line: 6, column: 1, scope: !61)
+// CHECK:STDOUT: !69 = distinct !DISubprogram(name: "Op", linkageName: "_COp.91f16365ca65525e:core.Destroy.Core", scope: null, file: !32, line: 7, type: !46, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !72)
+// CHECK:STDOUT: !70 = !DILocalVariable(arg: 1, scope: !69, type: !37)
+// CHECK:STDOUT: !71 = !DILocation(line: 7, column: 22, scope: !69)
+// CHECK:STDOUT: !72 = !{!70}
+// CHECK:STDOUT: !73 = distinct !DISubprogram(name: "Op", linkageName: "_COp.136cbc434fe80552:core.Destroy.Core", scope: null, file: !32, line: 7, type: !48, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !76)
+// CHECK:STDOUT: !74 = !DILocalVariable(arg: 1, scope: !73, type: !36)
+// CHECK:STDOUT: !75 = !DILocation(line: 7, column: 19, scope: !73)
+// CHECK:STDOUT: !76 = !{!74}
+// CHECK:STDOUT: !77 = distinct !DISubprogram(name: "Op", linkageName: "_COp.d38552e658b9d7ce:core.Destroy.Core", scope: null, file: !32, line: 9, type: !52, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !80)
+// CHECK:STDOUT: !78 = !DILocalVariable(arg: 1, scope: !77, type: !39)
+// CHECK:STDOUT: !79 = !DILocation(line: 9, column: 24, scope: !77)
+// CHECK:STDOUT: !80 = !{!78}
+// CHECK:STDOUT: !81 = distinct !DISubprogram(name: "Op", linkageName: "_COp.becc1452ae1d9d7b:core.Destroy.Core", scope: null, file: !32, line: 9, type: !54, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !84)
+// CHECK:STDOUT: !82 = !DILocalVariable(arg: 1, scope: !81, type: !8)
+// CHECK:STDOUT: !83 = !DILocation(line: 9, column: 21, scope: !81)
+// CHECK:STDOUT: !84 = !{!82}
+// CHECK:STDOUT: !85 = distinct !DISubprogram(name: "PassShort", linkageName: "_CPassShort.Main", scope: null, file: !32, line: 16, type: !58, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !100)
+// CHECK:STDOUT: !86 = !DILocalVariable(arg: 1, scope: !85, type: !37)
+// CHECK:STDOUT: !87 = !DILocalVariable(arg: 2, scope: !85, type: !42)
+// CHECK:STDOUT: !90 = !DILocation(line: 17, column: 18, scope: !85)
+// CHECK:STDOUT: !91 = !DILocation(line: 17, column: 3, scope: !85)
+// CHECK:STDOUT: !93 = !DILocation(line: 18, column: 18, scope: !85)
+// CHECK:STDOUT: !94 = !DILocation(line: 18, column: 3, scope: !85)
+// CHECK:STDOUT: !95 = !DILocation(line: 19, column: 18, scope: !85)
+// CHECK:STDOUT: !96 = !DILocation(line: 19, column: 3, scope: !85)
+// CHECK:STDOUT: !97 = !DILocation(line: 20, column: 18, scope: !85)
+// CHECK:STDOUT: !98 = !DILocation(line: 20, column: 3, scope: !85)
+// CHECK:STDOUT: !99 = !DILocation(line: 16, column: 1, scope: !85)
+// CHECK:STDOUT: !100 = !{!86, !87}
+// CHECK:STDOUT: !101 = distinct !DISubprogram(name: "__global_init", linkageName: "_C__global_init.Main", scope: null, file: !32, type: !41, spFlags: DISPFlagDefinition, unit: !33)
+// CHECK:STDOUT: !102 = !DILocation(line: 14, column: 1, scope: !101)
+// CHECK:STDOUT: !103 = !DILocation(line: 0, scope: !101)
+// CHECK:STDOUT: !104 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !105 = !{!"omnipotent char", !104, i64 0}
+// CHECK:STDOUT: !106 = !{!"any pointer", !105, i64 0}
+// CHECK:STDOUT: !107 = !{!"p1 omnipotent char", !106, i64 0}
+// CHECK:STDOUT: !108 = !{!107, !107, i64 0}
+// CHECK:STDOUT: !109 = !{!"short", !105, i64 0}
+// CHECK:STDOUT: !110 = !{!"p1 short", !106, i64 0}
+// CHECK:STDOUT: !111 = !{!110, !110, i64 0}
+// CHECK:STDOUT: !112 = !{!"int", !105, i64 0}
+// CHECK:STDOUT: !113 = !{!112, !112, i64 0}
+// CHECK:STDOUT: !114 = !{!"long", !105, i64 0}
+// CHECK:STDOUT: !115 = !{!114, !114, i64 0}
+// CHECK:STDOUT: !116 = !{!105, !105, i64 0}
+// CHECK:STDOUT: !117 = !{!109, !109, i64 0}
+// CHECK:STDOUT: !118 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !119 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !120 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !121 = !{!"__libc_errno", !112, i64 0}
+// CHECK:STDOUT: !122 = !{!121, !112, i64 0}
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'import_struct.carbon'
@@ -368,35 +368,35 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT: %struct.X = type { i32, i32, i32 }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CTest.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define void @_CTest.Main() #0 !dbg !127 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %x.var = alloca [12 x i8], align 4, !dbg !15
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %x.var), !dbg !15
-// CHECK:STDOUT:   call void @"_COp.51f3fb62cb986374:DefaultOrUnformed.Core.102476b7ae87d0a1"(ptr %x.var), !dbg !15
-// CHECK:STDOUT:   %.loc8_4.a = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 0, !dbg !16
-// CHECK:STDOUT:   store i32 1, ptr %.loc8_4.a, align 4, !dbg !16
-// CHECK:STDOUT:   %.loc9_4.b = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 4, !dbg !17
-// CHECK:STDOUT:   store i32 2, ptr %.loc9_4.b, align 4, !dbg !17
-// CHECK:STDOUT:   %.loc10_4.c = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 8, !dbg !18
-// CHECK:STDOUT:   store i32 3, ptr %.loc10_4.c, align 4, !dbg !18
-// CHECK:STDOUT:   call void @_Z11pass_struct1X.carbon_thunk._(ptr %x.var), !dbg !19
-// CHECK:STDOUT:   ret void, !dbg !20
+// CHECK:STDOUT:   %x.var = alloca [12 x i8], align 4, !dbg !128
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %x.var), !dbg !128
+// CHECK:STDOUT:   call void @"_COp.51f3fb62cb986374:DefaultOrUnformed.Core.102476b7ae87d0a1"(ptr %x.var), !dbg !128
+// CHECK:STDOUT:   %.loc8_4.a = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 0, !dbg !130
+// CHECK:STDOUT:   store i32 1, ptr %.loc8_4.a, align 4, !dbg !130
+// CHECK:STDOUT:   %.loc9_4.b = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 4, !dbg !131
+// CHECK:STDOUT:   store i32 2, ptr %.loc9_4.b, align 4, !dbg !131
+// CHECK:STDOUT:   %.loc10_4.c = getelementptr inbounds nuw [12 x i8], ptr %x.var, i32 0, i32 8, !dbg !132
+// CHECK:STDOUT:   store i32 3, ptr %.loc10_4.c, align 4, !dbg !132
+// CHECK:STDOUT:   call void @_Z11pass_struct1X.carbon_thunk._(ptr %x.var), !dbg !134
+// CHECK:STDOUT:   ret void, !dbg !135
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
 // 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 !21
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !21
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !145
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !145
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp:thunk:Default.eed9ddf3aaac414a.Core:X.Cpp"(ptr sret([12 x i8]) %return) #2 !dbg !24 {
+// CHECK:STDOUT: define weak_odr void @"_COp:thunk:Default.eed9ddf3aaac414a.Core:X.Cpp"(ptr sret([12 x i8]) %return) #2 !dbg !137 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_ZN1XC1Ev.carbon_thunk.(ptr %return), !dbg !29
-// CHECK:STDOUT:   ret void, !dbg !29
+// CHECK:STDOUT:   call void @_ZN1XC1Ev.carbon_thunk.(ptr %return), !dbg !138
+// CHECK:STDOUT:   ret void, !dbg !138
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
@@ -405,9 +405,9 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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 !21
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !21
-// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 4 %agg.tmp, ptr align 4 %1, i64 12, i1 false), !tbaa.struct !30
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !145
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !145
+// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 4 %agg.tmp, ptr align 4 %1, i64 12, i1 false), !tbaa.struct !147
 // 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
@@ -421,9 +421,9 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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.51f3fb62cb986374:DefaultOrUnformed.Core.102476b7ae87d0a1"(ptr sret([12 x i8]) %return) #0 !dbg !32 {
-// CHECK:STDOUT:   call void @"_COp:thunk:Default.eed9ddf3aaac414a.Core:X.Cpp"(ptr %return), !dbg !34
-// CHECK:STDOUT:   ret void, !dbg !35
+// CHECK:STDOUT: define linkonce_odr void @"_COp.51f3fb62cb986374:DefaultOrUnformed.Core.102476b7ae87d0a1"(ptr sret([12 x i8]) %return) #0 !dbg !139 {
+// CHECK:STDOUT:   call void @"_COp:thunk:Default.eed9ddf3aaac414a.Core:X.Cpp"(ptr %return), !dbg !142
+// CHECK:STDOUT:   ret void, !dbg !143
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare void @_Z11pass_struct1X(i64, i32) #5
@@ -441,46 +441,46 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!124}
+// CHECK:STDOUT: !llvm.module.flags = !{!118, !119, !120, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!122}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_struct.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "Test", linkageName: "_CTest.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 7, column: 3, scope: !12)
-// CHECK:STDOUT: !16 = !DILocation(line: 8, column: 3, scope: !12)
-// CHECK:STDOUT: !17 = !DILocation(line: 9, column: 3, scope: !12)
-// CHECK:STDOUT: !18 = !DILocation(line: 10, column: 3, scope: !12)
-// CHECK:STDOUT: !19 = !DILocation(line: 11, column: 3, scope: !12)
-// CHECK:STDOUT: !20 = !DILocation(line: 6, column: 1, scope: !12)
-// CHECK:STDOUT: !21 = !{!22, !22, i64 0}
-// CHECK:STDOUT: !22 = !{!"p1 _ZTS1X", !23, i64 0}
-// CHECK:STDOUT: !23 = !{!"any pointer", !10, i64 0}
-// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk:Default.eed9ddf3aaac414a.Core:X.Cpp", scope: null, file: !25, line: 2, type: !26, spFlags: DISPFlagDefinition, unit: !0)
-// 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 = !{i64 0, i64 4, !31, i64 4, i64 4, !31, i64 8, i64 4, !31}
-// CHECK:STDOUT: !31 = !{!9, !9, i64 0}
-// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "Op", linkageName: "_COp.51f3fb62cb986374:DefaultOrUnformed.Core.102476b7ae87d0a1", scope: null, file: !33, line: 9, type: !26, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !33 = !DIFile(filename: "min_prelude/parts/default.carbon", directory: "")
-// CHECK:STDOUT: !34 = !DILocation(line: 9, column: 28, scope: !32)
-// CHECK:STDOUT: !35 = !DILocation(line: 9, column: 21, scope: !32)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !26 = !DIFile(filename: "min_prelude/parts/default.carbon", directory: "")
+// CHECK:STDOUT: !40 = !{null}
+// CHECK:STDOUT: !41 = !DISubroutineType(types: !40)
+// CHECK:STDOUT: !42 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !104 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !105 = !{!"omnipotent char", !104, i64 0}
+// CHECK:STDOUT: !106 = !{!"any pointer", !105, i64 0}
+// CHECK:STDOUT: !112 = !{!"int", !105, i64 0}
+// CHECK:STDOUT: !113 = !{!112, !112, i64 0}
+// CHECK:STDOUT: !118 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !119 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !120 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !121 = !{!"__libc_errno", !112, i64 0}
+// CHECK:STDOUT: !122 = !{!121, !112, i64 0}
+// CHECK:STDOUT: !123 = !DIFile(filename: "import_struct.carbon", directory: "")
+// CHECK:STDOUT: !124 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !123, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !125 = !{!42}
+// CHECK:STDOUT: !126 = !DISubroutineType(types: !125)
+// CHECK:STDOUT: !127 = distinct !DISubprogram(name: "Test", linkageName: "_CTest.Main", scope: null, file: !123, line: 6, type: !41, spFlags: DISPFlagDefinition, unit: !124)
+// CHECK:STDOUT: !128 = !DILocation(line: 7, column: 3, scope: !127)
+// CHECK:STDOUT: !130 = !DILocation(line: 8, column: 3, scope: !127)
+// CHECK:STDOUT: !131 = !DILocation(line: 9, column: 3, scope: !127)
+// CHECK:STDOUT: !132 = !DILocation(line: 10, column: 3, scope: !127)
+// CHECK:STDOUT: !134 = !DILocation(line: 11, column: 3, scope: !127)
+// CHECK:STDOUT: !135 = !DILocation(line: 6, column: 1, scope: !127)
+// CHECK:STDOUT: !136 = !DIFile(filename: "./struct.h", directory: "")
+// CHECK:STDOUT: !137 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk:Default.eed9ddf3aaac414a.Core:X.Cpp", scope: null, file: !136, line: 2, type: !126, spFlags: DISPFlagDefinition, unit: !124)
+// CHECK:STDOUT: !138 = !DILocation(line: 2, column: 8, scope: !137)
+// CHECK:STDOUT: !139 = distinct !DISubprogram(name: "Op", linkageName: "_COp.51f3fb62cb986374:DefaultOrUnformed.Core.102476b7ae87d0a1", scope: null, file: !26, line: 9, type: !126, spFlags: DISPFlagDefinition, unit: !124)
+// CHECK:STDOUT: !142 = !DILocation(line: 9, column: 28, scope: !139)
+// CHECK:STDOUT: !143 = !DILocation(line: 9, column: 21, scope: !139)
+// CHECK:STDOUT: !144 = !{!"p1 _ZTS1X", !106, i64 0}
+// CHECK:STDOUT: !145 = !{!144, !144, i64 0}
+// CHECK:STDOUT: !147 = !{i64 0, i64 4, !113, i64 4, i64 4, !113, i64 8, i64 4, !113}
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'import_class_with_nontrivial_copy.carbon'
@@ -491,18 +491,18 @@ fn PassValueExpr(y: Cpp.Y) {
 // CHECK:STDOUT: %class.Y = type { i32, i32, i32 }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassRefExpr.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define void @_CPassRefExpr.Main() #0 !dbg !150 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %y.var = alloca [12 x i8], align 4, !dbg !15
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %y.var), !dbg !15
-// CHECK:STDOUT:   %.loc8_4.a = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 0, !dbg !16
-// CHECK:STDOUT:   store i32 1, ptr %.loc8_4.a, align 4, !dbg !16
-// CHECK:STDOUT:   %.loc9_4.b = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 4, !dbg !17
-// CHECK:STDOUT:   store i32 2, ptr %.loc9_4.b, align 4, !dbg !17
-// CHECK:STDOUT:   %.loc10_4.c = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 8, !dbg !18
-// CHECK:STDOUT:   store i32 3, ptr %.loc10_4.c, align 4, !dbg !18
-// CHECK:STDOUT:   call void @_Z11pass_struct1Y.carbon_thunk._(ptr %y.var), !dbg !19
-// CHECK:STDOUT:   ret void, !dbg !20
+// CHECK:STDOUT:   %y.var = alloca [12 x i8], align 4, !dbg !151
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %y.var), !dbg !151
+// CHECK:STDOUT:   %.loc8_4.a = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 0, !dbg !153
+// CHECK:STDOUT:   store i32 1, ptr %.loc8_4.a, align 4, !dbg !153
+// CHECK:STDOUT:   %.loc9_4.b = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 4, !dbg !154
+// CHECK:STDOUT:   store i32 2, ptr %.loc9_4.b, align 4, !dbg !154
+// CHECK:STDOUT:   %.loc10_4.c = getelementptr inbounds nuw [12 x i8], ptr %y.var, i32 0, i32 8, !dbg !155
+// CHECK:STDOUT:   store i32 3, ptr %.loc10_4.c, align 4, !dbg !155
+// CHECK:STDOUT:   call void @_Z11pass_struct1Y.carbon_thunk._(ptr %y.var), !dbg !157
+// CHECK:STDOUT:   ret void, !dbg !158
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
@@ -510,36 +510,36 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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 !21
-// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !21
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !171
+// CHECK:STDOUT:   %1 = load ptr, ptr %.addr, align 8, !tbaa !171
 // 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 align 4 dead_on_return %agg.tmp)
+// CHECK:STDOUT:   call void @_Z11pass_struct1Y(ptr nofreeobj noundef align 4 dead_on_return dereferenceable(12) %agg.tmp)
 // CHECK:STDOUT:   ret void
 // 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() #0 !dbg !24 {
+// CHECK:STDOUT: define void @_CPassInitExpr.Main() #0 !dbg !159 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc17_24.1.temp = alloca [12 x i8], align 4, !dbg !25
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc17_24.1.temp), !dbg !25
-// CHECK:STDOUT:   call void @_CMake.Main(ptr %.loc17_24.1.temp), !dbg !25
-// CHECK:STDOUT:   call void @_Z11pass_struct1Y.carbon_thunk._(ptr %.loc17_24.1.temp), !dbg !26
-// CHECK:STDOUT:   ret void, !dbg !27
+// CHECK:STDOUT:   %.loc17_24.1.temp = alloca [12 x i8], align 4, !dbg !160
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc17_24.1.temp), !dbg !160
+// CHECK:STDOUT:   call void @_CMake.Main(ptr %.loc17_24.1.temp), !dbg !160
+// CHECK:STDOUT:   call void @_Z11pass_struct1Y.carbon_thunk._(ptr %.loc17_24.1.temp), !dbg !161
+// CHECK:STDOUT:   ret void, !dbg !162
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CPassValueExpr.Main(ptr %y) #0 !dbg !28 {
+// CHECK:STDOUT: define void @_CPassValueExpr.Main(ptr %y) #0 !dbg !163 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z11pass_struct1Y.carbon_thunk._(ptr %y), !dbg !34
-// CHECK:STDOUT:   ret void, !dbg !35
+// CHECK:STDOUT:   call void @_Z11pass_struct1Y.carbon_thunk._(ptr %y), !dbg !167
+// CHECK:STDOUT:   ret void, !dbg !168
 // 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: declare void @_Z11pass_struct1Y(ptr noundef align 4 dead_on_return) #3
+// CHECK:STDOUT: declare void @_Z11pass_struct1Y(ptr nofreeobj noundef align 4 dead_on_return dereferenceable(12)) #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:
@@ -551,44 +551,44 @@ fn PassValueExpr(y: Cpp.Y) {
 // 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.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!149}
+// CHECK:STDOUT: !llvm.module.flags = !{!118, !119, !120, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!122}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_class_with_nontrivial_copy.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "PassRefExpr", linkageName: "_CPassRefExpr.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{null}
-// CHECK:STDOUT: !15 = !DILocation(line: 7, column: 3, scope: !12)
-// CHECK:STDOUT: !16 = !DILocation(line: 8, column: 3, scope: !12)
-// CHECK:STDOUT: !17 = !DILocation(line: 9, column: 3, scope: !12)
-// CHECK:STDOUT: !18 = !DILocation(line: 10, column: 3, scope: !12)
-// CHECK:STDOUT: !19 = !DILocation(line: 11, column: 3, scope: !12)
-// CHECK:STDOUT: !20 = !DILocation(line: 6, column: 1, scope: !12)
-// CHECK:STDOUT: !21 = !{!22, !22, i64 0}
-// CHECK:STDOUT: !22 = !{!"p1 _ZTS1Y", !23, i64 0}
-// CHECK:STDOUT: !23 = !{!"any pointer", !10, i64 0}
-// CHECK:STDOUT: !24 = distinct !DISubprogram(name: "PassInitExpr", linkageName: "_CPassInitExpr.Main", scope: null, file: !1, line: 16, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !25 = !DILocation(line: 17, column: 19, scope: !24)
-// CHECK:STDOUT: !26 = !DILocation(line: 17, column: 3, scope: !24)
-// CHECK:STDOUT: !27 = !DILocation(line: 16, column: 1, scope: !24)
-// CHECK:STDOUT: !28 = distinct !DISubprogram(name: "PassValueExpr", linkageName: "_CPassValueExpr.Main", scope: null, file: !1, line: 20, type: !29, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !32)
-// CHECK:STDOUT: !29 = !DISubroutineType(types: !30)
-// CHECK:STDOUT: !30 = !{null, !31}
-// CHECK:STDOUT: !31 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !32 = !{!33}
-// CHECK:STDOUT: !33 = !DILocalVariable(arg: 1, scope: !28, type: !31)
-// CHECK:STDOUT: !34 = !DILocation(line: 21, column: 3, scope: !28)
-// CHECK:STDOUT: !35 = !DILocation(line: 20, column: 1, scope: !28)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !40 = !{null}
+// CHECK:STDOUT: !41 = !DISubroutineType(types: !40)
+// CHECK:STDOUT: !42 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !59 = !{null, !42}
+// CHECK:STDOUT: !60 = !DISubroutineType(types: !59)
+// CHECK:STDOUT: !104 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !105 = !{!"omnipotent char", !104, i64 0}
+// CHECK:STDOUT: !106 = !{!"any pointer", !105, i64 0}
+// CHECK:STDOUT: !112 = !{!"int", !105, i64 0}
+// CHECK:STDOUT: !118 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !119 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !120 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !121 = !{!"__libc_errno", !112, i64 0}
+// CHECK:STDOUT: !122 = !{!121, !112, i64 0}
+// CHECK:STDOUT: !148 = !DIFile(filename: "import_class_with_nontrivial_copy.carbon", directory: "")
+// CHECK:STDOUT: !149 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !148, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !150 = distinct !DISubprogram(name: "PassRefExpr", linkageName: "_CPassRefExpr.Main", scope: null, file: !148, line: 6, type: !41, spFlags: DISPFlagDefinition, unit: !149)
+// CHECK:STDOUT: !151 = !DILocation(line: 7, column: 3, scope: !150)
+// CHECK:STDOUT: !153 = !DILocation(line: 8, column: 3, scope: !150)
+// CHECK:STDOUT: !154 = !DILocation(line: 9, column: 3, scope: !150)
+// CHECK:STDOUT: !155 = !DILocation(line: 10, column: 3, scope: !150)
+// CHECK:STDOUT: !157 = !DILocation(line: 11, column: 3, scope: !150)
+// CHECK:STDOUT: !158 = !DILocation(line: 6, column: 1, scope: !150)
+// CHECK:STDOUT: !159 = distinct !DISubprogram(name: "PassInitExpr", linkageName: "_CPassInitExpr.Main", scope: null, file: !148, line: 16, type: !41, spFlags: DISPFlagDefinition, unit: !149)
+// CHECK:STDOUT: !160 = !DILocation(line: 17, column: 19, scope: !159)
+// CHECK:STDOUT: !161 = !DILocation(line: 17, column: 3, scope: !159)
+// CHECK:STDOUT: !162 = !DILocation(line: 16, column: 1, scope: !159)
+// CHECK:STDOUT: !163 = distinct !DISubprogram(name: "PassValueExpr", linkageName: "_CPassValueExpr.Main", scope: null, file: !148, line: 20, type: !60, spFlags: DISPFlagDefinition, unit: !149, retainedNodes: !169)
+// CHECK:STDOUT: !164 = !DILocalVariable(arg: 1, scope: !163, type: !42)
+// CHECK:STDOUT: !167 = !DILocation(line: 21, column: 3, scope: !163)
+// CHECK:STDOUT: !168 = !DILocation(line: 20, column: 1, scope: !163)
+// CHECK:STDOUT: !169 = !{!164}
+// CHECK:STDOUT: !170 = !{!"p1 _ZTS1Y", !106, i64 0}
+// CHECK:STDOUT: !171 = !{!170, !170, i64 0}
 // CHECK:STDOUT:
@@ -119,121 +119,121 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i8 @_CGetU8.Main() #0 !dbg !12 {
+// CHECK:STDOUT: define i8 @_CGetU8.Main() #0 !dbg !53 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc6_40.1.temp = alloca i8, align 1, !dbg !16
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc6_40.1.temp), !dbg !16
-// CHECK:STDOUT:   call void @_Z8ReturnU8v.carbon_thunk.(ptr %.loc6_40.1.temp), !dbg !16
-// CHECK:STDOUT:   %0 = load i8, ptr %.loc6_40.1.temp, align 1, !dbg !17
-// CHECK:STDOUT:   ret i8 %0, !dbg !17
+// CHECK:STDOUT:   %.loc6_40.1.temp = alloca i8, align 1, !dbg !56
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc6_40.1.temp), !dbg !56
+// CHECK:STDOUT:   call void @_Z8ReturnU8v.carbon_thunk.(ptr %.loc6_40.1.temp), !dbg !56
+// CHECK:STDOUT:   %0 = load i8, ptr %.loc6_40.1.temp, align 1, !dbg !57
+// CHECK:STDOUT:   ret i8 %0, !dbg !57
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
 // 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 !18
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !18
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !199
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !199
 // CHECK:STDOUT:   %call = call noundef zeroext i8 @_Z8ReturnU8v()
-// CHECK:STDOUT:   store i8 %call, ptr %0, align 1, !tbaa !21
+// CHECK:STDOUT:   store i8 %call, ptr %0, align 1, !tbaa !200
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i16 @_CGetU16.Main() #0 !dbg !22 {
+// CHECK:STDOUT: define i16 @_CGetU16.Main() #0 !dbg !58 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc7_43.1.temp = alloca i16, align 2, !dbg !26
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_43.1.temp), !dbg !26
-// CHECK:STDOUT:   call void @_Z9ReturnU16v.carbon_thunk.(ptr %.loc7_43.1.temp), !dbg !26
-// CHECK:STDOUT:   %0 = load i16, ptr %.loc7_43.1.temp, align 2, !dbg !27
-// CHECK:STDOUT:   ret i16 %0, !dbg !27
+// CHECK:STDOUT:   %.loc7_43.1.temp = alloca i16, align 2, !dbg !61
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc7_43.1.temp), !dbg !61
+// CHECK:STDOUT:   call void @_Z9ReturnU16v.carbon_thunk.(ptr %.loc7_43.1.temp), !dbg !61
+// CHECK:STDOUT:   %0 = load i16, ptr %.loc7_43.1.temp, align 2, !dbg !62
+// CHECK:STDOUT:   ret i16 %0, !dbg !62
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
 // 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 !28
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !28
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !203
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !203
 // CHECK:STDOUT:   %call = call noundef zeroext i16 @_Z9ReturnU16v()
-// CHECK:STDOUT:   store i16 %call, ptr %0, align 2, !tbaa !30
+// CHECK:STDOUT:   store i16 %call, ptr %0, align 2, !tbaa !204
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CGetU32.Main() #0 !dbg !32 {
+// CHECK:STDOUT: define i32 @_CGetU32.Main() #0 !dbg !63 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %ReturnU32.call = call i32 @_Z9ReturnU32v(), !dbg !36
-// CHECK:STDOUT:   ret i32 %ReturnU32.call, !dbg !37
+// CHECK:STDOUT:   %ReturnU32.call = call i32 @_Z9ReturnU32v(), !dbg !66
+// CHECK:STDOUT:   ret i32 %ReturnU32.call, !dbg !67
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare noundef i32 @_Z9ReturnU32v() #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i64 @_CGetU64.Main() #0 !dbg !38 {
+// CHECK:STDOUT: define i64 @_CGetU64.Main() #0 !dbg !68 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %ReturnU64.call = call i64 @_Z9ReturnU64v(), !dbg !42
-// CHECK:STDOUT:   ret i64 %ReturnU64.call, !dbg !43
+// CHECK:STDOUT:   %ReturnU64.call = call i64 @_Z9ReturnU64v(), !dbg !71
+// CHECK:STDOUT:   ret i64 %ReturnU64.call, !dbg !72
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare noundef i64 @_Z9ReturnU64v() #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i8 @_CGetI8.Main() #0 !dbg !44 {
+// CHECK:STDOUT: define i8 @_CGetI8.Main() #0 !dbg !73 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc11_40.1.temp = alloca i8, align 1, !dbg !48
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc11_40.1.temp), !dbg !48
-// CHECK:STDOUT:   call void @_Z8ReturnI8v.carbon_thunk.(ptr %.loc11_40.1.temp), !dbg !48
-// CHECK:STDOUT:   %0 = load i8, ptr %.loc11_40.1.temp, align 1, !dbg !49
-// CHECK:STDOUT:   ret i8 %0, !dbg !49
+// CHECK:STDOUT:   %.loc11_40.1.temp = alloca i8, align 1, !dbg !76
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc11_40.1.temp), !dbg !76
+// CHECK:STDOUT:   call void @_Z8ReturnI8v.carbon_thunk.(ptr %.loc11_40.1.temp), !dbg !76
+// CHECK:STDOUT:   %0 = load i8, ptr %.loc11_40.1.temp, align 1, !dbg !77
+// CHECK:STDOUT:   ret i8 %0, !dbg !77
 // 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 !18
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !18
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !199
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !199
 // CHECK:STDOUT:   %call = call noundef signext i8 @_Z8ReturnI8v()
-// CHECK:STDOUT:   store i8 %call, ptr %0, align 1, !tbaa !21
+// CHECK:STDOUT:   store i8 %call, ptr %0, align 1, !tbaa !200
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i16 @_CGetI16.Main() #0 !dbg !50 {
+// CHECK:STDOUT: define i16 @_CGetI16.Main() #0 !dbg !78 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc12_43.1.temp = alloca i16, align 2, !dbg !54
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc12_43.1.temp), !dbg !54
-// CHECK:STDOUT:   call void @_Z9ReturnI16v.carbon_thunk.(ptr %.loc12_43.1.temp), !dbg !54
-// CHECK:STDOUT:   %0 = load i16, ptr %.loc12_43.1.temp, align 2, !dbg !55
-// CHECK:STDOUT:   ret i16 %0, !dbg !55
+// CHECK:STDOUT:   %.loc12_43.1.temp = alloca i16, align 2, !dbg !81
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc12_43.1.temp), !dbg !81
+// CHECK:STDOUT:   call void @_Z9ReturnI16v.carbon_thunk.(ptr %.loc12_43.1.temp), !dbg !81
+// CHECK:STDOUT:   %0 = load i16, ptr %.loc12_43.1.temp, align 2, !dbg !82
+// CHECK:STDOUT:   ret i16 %0, !dbg !82
 // 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 !28
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !28
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !203
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !203
 // CHECK:STDOUT:   %call = call noundef signext i16 @_Z9ReturnI16v()
-// CHECK:STDOUT:   store i16 %call, ptr %0, align 2, !tbaa !30
+// CHECK:STDOUT:   store i16 %call, ptr %0, align 2, !tbaa !204
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i32 @_CGetI32.Main() #0 !dbg !56 {
+// CHECK:STDOUT: define i32 @_CGetI32.Main() #0 !dbg !83 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %ReturnI32.call = call i32 @_Z9ReturnI32v(), !dbg !60
-// CHECK:STDOUT:   ret i32 %ReturnI32.call, !dbg !61
+// CHECK:STDOUT:   %ReturnI32.call = call i32 @_Z9ReturnI32v(), !dbg !86
+// CHECK:STDOUT:   ret i32 %ReturnI32.call, !dbg !87
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare noundef i32 @_Z9ReturnI32v() #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define i64 @_CGetI64.Main() #0 !dbg !62 {
+// CHECK:STDOUT: define i64 @_CGetI64.Main() #0 !dbg !88 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %ReturnI64.call = call i64 @_Z9ReturnI64v(), !dbg !66
-// CHECK:STDOUT:   ret i64 %ReturnI64.call, !dbg !67
+// CHECK:STDOUT:   %ReturnI64.call = call i64 @_Z9ReturnI64v(), !dbg !91
+// CHECK:STDOUT:   ret i64 %ReturnI64.call, !dbg !92
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: declare noundef i64 @_Z9ReturnI64v() #2
@@ -241,133 +241,133 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // 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() #0 !dbg !68 {
+// CHECK:STDOUT: define void @_CLets.Main() #0 !dbg !93 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc19_32.1.temp = alloca i8, align 1, !dbg !71
-// CHECK:STDOUT:   %.loc20_35.1.temp = alloca i16, align 2, !dbg !72
-// CHECK:STDOUT:   %.loc24_32.1.temp = alloca i8, align 1, !dbg !73
-// CHECK:STDOUT:   %.loc25_35.1.temp = alloca i16, align 2, !dbg !74
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc19_32.1.temp), !dbg !71
-// CHECK:STDOUT:   call void @_Z8ReturnU8v.carbon_thunk.(ptr %.loc19_32.1.temp), !dbg !71
-// CHECK:STDOUT:   %.loc19_32.4 = load i8, ptr %.loc19_32.1.temp, align 1, !dbg !71
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc20_35.1.temp), !dbg !72
-// CHECK:STDOUT:   call void @_Z9ReturnU16v.carbon_thunk.(ptr %.loc20_35.1.temp), !dbg !72
-// CHECK:STDOUT:   %.loc20_35.4 = load i16, ptr %.loc20_35.1.temp, align 2, !dbg !72
-// CHECK:STDOUT:   %ReturnU32.call = call i32 @_Z9ReturnU32v(), !dbg !75
-// CHECK:STDOUT:   %ReturnU64.call = call i64 @_Z9ReturnU64v(), !dbg !76
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc24_32.1.temp), !dbg !73
-// CHECK:STDOUT:   call void @_Z8ReturnI8v.carbon_thunk.(ptr %.loc24_32.1.temp), !dbg !73
-// CHECK:STDOUT:   %.loc24_32.4 = load i8, ptr %.loc24_32.1.temp, align 1, !dbg !73
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc25_35.1.temp), !dbg !74
-// CHECK:STDOUT:   call void @_Z9ReturnI16v.carbon_thunk.(ptr %.loc25_35.1.temp), !dbg !74
-// CHECK:STDOUT:   %.loc25_35.4 = load i16, ptr %.loc25_35.1.temp, align 2, !dbg !74
-// CHECK:STDOUT:   %ReturnI32.call = call i32 @_Z9ReturnI32v(), !dbg !77
-// CHECK:STDOUT:   %ReturnI64.call = call i64 @_Z9ReturnI64v(), !dbg !78
-// CHECK:STDOUT:   call void @_CUse.Main(i8 %.loc19_32.4, i16 %.loc20_35.4, i32 %ReturnU32.call, i64 %ReturnU64.call, i8 %.loc24_32.4, i16 %.loc25_35.4, i32 %ReturnI32.call, i64 %ReturnI64.call), !dbg !79
-// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc25_35.1.temp), !dbg !74
-// CHECK:STDOUT:   call void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr %.loc24_32.1.temp), !dbg !73
-// CHECK:STDOUT:   call void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr %.loc20_35.1.temp), !dbg !72
-// CHECK:STDOUT:   call void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr %.loc19_32.1.temp), !dbg !71
-// CHECK:STDOUT:   ret void, !dbg !80
+// CHECK:STDOUT:   %.loc19_32.1.temp = alloca i8, align 1, !dbg !94
+// CHECK:STDOUT:   %.loc20_35.1.temp = alloca i16, align 2, !dbg !97
+// CHECK:STDOUT:   %.loc24_32.1.temp = alloca i8, align 1, !dbg !106
+// CHECK:STDOUT:   %.loc25_35.1.temp = alloca i16, align 2, !dbg !109
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc19_32.1.temp), !dbg !94
+// CHECK:STDOUT:   call void @_Z8ReturnU8v.carbon_thunk.(ptr %.loc19_32.1.temp), !dbg !94
+// CHECK:STDOUT:   %.loc19_32.4 = load i8, ptr %.loc19_32.1.temp, align 1, !dbg !94
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc20_35.1.temp), !dbg !97
+// CHECK:STDOUT:   call void @_Z9ReturnU16v.carbon_thunk.(ptr %.loc20_35.1.temp), !dbg !97
+// CHECK:STDOUT:   %.loc20_35.4 = load i16, ptr %.loc20_35.1.temp, align 2, !dbg !97
+// CHECK:STDOUT:   %ReturnU32.call = call i32 @_Z9ReturnU32v(), !dbg !100
+// CHECK:STDOUT:   %ReturnU64.call = call i64 @_Z9ReturnU64v(), !dbg !103
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc24_32.1.temp), !dbg !106
+// CHECK:STDOUT:   call void @_Z8ReturnI8v.carbon_thunk.(ptr %.loc24_32.1.temp), !dbg !106
+// CHECK:STDOUT:   %.loc24_32.4 = load i8, ptr %.loc24_32.1.temp, align 1, !dbg !106
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc25_35.1.temp), !dbg !109
+// CHECK:STDOUT:   call void @_Z9ReturnI16v.carbon_thunk.(ptr %.loc25_35.1.temp), !dbg !109
+// CHECK:STDOUT:   %.loc25_35.4 = load i16, ptr %.loc25_35.1.temp, align 2, !dbg !109
+// CHECK:STDOUT:   %ReturnI32.call = call i32 @_Z9ReturnI32v(), !dbg !112
+// CHECK:STDOUT:   %ReturnI64.call = call i64 @_Z9ReturnI64v(), !dbg !115
+// CHECK:STDOUT:   call void @_CUse.Main(i8 %.loc19_32.4, i16 %.loc20_35.4, i32 %ReturnU32.call, i64 %ReturnU64.call, i8 %.loc24_32.4, i16 %.loc25_35.4, i32 %ReturnI32.call, i64 %ReturnI64.call), !dbg !126
+// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %.loc25_35.1.temp), !dbg !109
+// CHECK:STDOUT:   call void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr %.loc24_32.1.temp), !dbg !106
+// CHECK:STDOUT:   call void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr %.loc20_35.1.temp), !dbg !97
+// CHECK:STDOUT:   call void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr %.loc19_32.1.temp), !dbg !94
+// CHECK:STDOUT:   ret void, !dbg !127
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %self) #0 !dbg !81 {
+// CHECK:STDOUT: define weak_odr void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %self) #0 !dbg !128 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !86
+// CHECK:STDOUT:   ret void, !dbg !130
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr %self) #0 !dbg !87 {
+// CHECK:STDOUT: define weak_odr void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr %self) #0 !dbg !132 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !92
+// CHECK:STDOUT:   ret void, !dbg !134
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr %self) #0 !dbg !93 {
+// CHECK:STDOUT: define weak_odr void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr %self) #0 !dbg !136 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !98
+// CHECK:STDOUT:   ret void, !dbg !138
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr %self) #0 !dbg !99 {
+// CHECK:STDOUT: define weak_odr void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr %self) #0 !dbg !140 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !104
+// CHECK:STDOUT:   ret void, !dbg !142
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CVars.Main() #0 !dbg !105 {
+// CHECK:STDOUT: define void @_CVars.Main() #0 !dbg !144 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %my_u8.var = alloca i8, align 1, !dbg !106
-// CHECK:STDOUT:   %my_u16.var = alloca i16, align 2, !dbg !107
-// CHECK:STDOUT:   %my_u32.var = alloca i32, align 4, !dbg !108
-// CHECK:STDOUT:   %my_u64.var = alloca i64, align 8, !dbg !109
-// CHECK:STDOUT:   %my_i8.var = alloca i8, align 1, !dbg !110
-// CHECK:STDOUT:   %my_i16.var = alloca i16, align 2, !dbg !111
-// CHECK:STDOUT:   %my_i32.var = alloca i32, align 4, !dbg !112
-// CHECK:STDOUT:   %my_i64.var = alloca i64, align 8, !dbg !113
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_u8.var), !dbg !106
-// CHECK:STDOUT:   call void @_Z8ReturnU8v.carbon_thunk.(ptr %my_u8.var), !dbg !114
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_u16.var), !dbg !107
-// CHECK:STDOUT:   call void @_Z9ReturnU16v.carbon_thunk.(ptr %my_u16.var), !dbg !115
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_u32.var), !dbg !108
-// CHECK:STDOUT:   %ReturnU32.call = call i32 @_Z9ReturnU32v(), !dbg !116
-// CHECK:STDOUT:   store i32 %ReturnU32.call, ptr %my_u32.var, align 4, !dbg !108
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_u64.var), !dbg !109
-// CHECK:STDOUT:   %ReturnU64.call = call i64 @_Z9ReturnU64v(), !dbg !117
-// CHECK:STDOUT:   store i64 %ReturnU64.call, ptr %my_u64.var, align 8, !dbg !109
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_i8.var), !dbg !110
-// CHECK:STDOUT:   call void @_Z8ReturnI8v.carbon_thunk.(ptr %my_i8.var), !dbg !118
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_i16.var), !dbg !111
-// CHECK:STDOUT:   call void @_Z9ReturnI16v.carbon_thunk.(ptr %my_i16.var), !dbg !119
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_i32.var), !dbg !112
-// CHECK:STDOUT:   %ReturnI32.call = call i32 @_Z9ReturnI32v(), !dbg !120
-// CHECK:STDOUT:   store i32 %ReturnI32.call, ptr %my_i32.var, align 4, !dbg !112
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_i64.var), !dbg !113
-// CHECK:STDOUT:   %ReturnI64.call = call i64 @_Z9ReturnI64v(), !dbg !121
-// CHECK:STDOUT:   store i64 %ReturnI64.call, ptr %my_i64.var, align 8, !dbg !113
-// CHECK:STDOUT:   %.loc43_7 = load i8, ptr %my_u8.var, align 1, !dbg !122
-// CHECK:STDOUT:   %.loc43_14 = load i16, ptr %my_u16.var, align 2, !dbg !123
-// CHECK:STDOUT:   %.loc43_22 = load i32, ptr %my_u32.var, align 4, !dbg !124
-// CHECK:STDOUT:   %.loc43_30 = load i64, ptr %my_u64.var, align 8, !dbg !125
-// CHECK:STDOUT:   %.loc43_38 = load i8, ptr %my_i8.var, align 1, !dbg !126
-// CHECK:STDOUT:   %.loc43_45 = load i16, ptr %my_i16.var, align 2, !dbg !127
-// CHECK:STDOUT:   %.loc43_53 = load i32, ptr %my_i32.var, align 4, !dbg !128
-// CHECK:STDOUT:   %.loc43_61 = load i64, ptr %my_i64.var, align 8, !dbg !129
-// CHECK:STDOUT:   call void @_CUse.Main(i8 %.loc43_7, i16 %.loc43_14, i32 %.loc43_22, i64 %.loc43_30, i8 %.loc43_38, i16 %.loc43_45, i32 %.loc43_53, i64 %.loc43_61), !dbg !130
-// CHECK:STDOUT:   call void @"_COp.5f42013854821c52:core.Destroy.Core"(ptr %my_i64.var), !dbg !113
-// CHECK:STDOUT:   call void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %my_i32.var), !dbg !112
-// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %my_i16.var), !dbg !111
-// CHECK:STDOUT:   call void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr %my_i8.var), !dbg !110
-// CHECK:STDOUT:   call void @"_COp.8423634153f3fb6c:core.Destroy.Core"(ptr %my_u64.var), !dbg !109
-// CHECK:STDOUT:   call void @"_COp.77fcb7cb81390d28:core.Destroy.Core"(ptr %my_u32.var), !dbg !108
-// CHECK:STDOUT:   call void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr %my_u16.var), !dbg !107
-// CHECK:STDOUT:   call void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr %my_u8.var), !dbg !106
-// CHECK:STDOUT:   ret void, !dbg !131
+// CHECK:STDOUT:   %my_u8.var = alloca i8, align 1, !dbg !145
+// CHECK:STDOUT:   %my_u16.var = alloca i16, align 2, !dbg !148
+// CHECK:STDOUT:   %my_u32.var = alloca i32, align 4, !dbg !151
+// CHECK:STDOUT:   %my_u64.var = alloca i64, align 8, !dbg !154
+// CHECK:STDOUT:   %my_i8.var = alloca i8, align 1, !dbg !157
+// CHECK:STDOUT:   %my_i16.var = alloca i16, align 2, !dbg !160
+// CHECK:STDOUT:   %my_i32.var = alloca i32, align 4, !dbg !163
+// CHECK:STDOUT:   %my_i64.var = alloca i64, align 8, !dbg !166
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_u8.var), !dbg !145
+// CHECK:STDOUT:   call void @_Z8ReturnU8v.carbon_thunk.(ptr %my_u8.var), !dbg !146
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_u16.var), !dbg !148
+// CHECK:STDOUT:   call void @_Z9ReturnU16v.carbon_thunk.(ptr %my_u16.var), !dbg !149
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_u32.var), !dbg !151
+// CHECK:STDOUT:   %ReturnU32.call = call i32 @_Z9ReturnU32v(), !dbg !152
+// CHECK:STDOUT:   store i32 %ReturnU32.call, ptr %my_u32.var, align 4, !dbg !151
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_u64.var), !dbg !154
+// CHECK:STDOUT:   %ReturnU64.call = call i64 @_Z9ReturnU64v(), !dbg !155
+// CHECK:STDOUT:   store i64 %ReturnU64.call, ptr %my_u64.var, align 8, !dbg !154
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_i8.var), !dbg !157
+// CHECK:STDOUT:   call void @_Z8ReturnI8v.carbon_thunk.(ptr %my_i8.var), !dbg !158
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_i16.var), !dbg !160
+// CHECK:STDOUT:   call void @_Z9ReturnI16v.carbon_thunk.(ptr %my_i16.var), !dbg !161
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_i32.var), !dbg !163
+// CHECK:STDOUT:   %ReturnI32.call = call i32 @_Z9ReturnI32v(), !dbg !164
+// CHECK:STDOUT:   store i32 %ReturnI32.call, ptr %my_i32.var, align 4, !dbg !163
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %my_i64.var), !dbg !166
+// CHECK:STDOUT:   %ReturnI64.call = call i64 @_Z9ReturnI64v(), !dbg !167
+// CHECK:STDOUT:   store i64 %ReturnI64.call, ptr %my_i64.var, align 8, !dbg !166
+// CHECK:STDOUT:   %.loc43_7 = load i8, ptr %my_u8.var, align 1, !dbg !169
+// CHECK:STDOUT:   %.loc43_14 = load i16, ptr %my_u16.var, align 2, !dbg !170
+// CHECK:STDOUT:   %.loc43_22 = load i32, ptr %my_u32.var, align 4, !dbg !171
+// CHECK:STDOUT:   %.loc43_30 = load i64, ptr %my_u64.var, align 8, !dbg !172
+// CHECK:STDOUT:   %.loc43_38 = load i8, ptr %my_i8.var, align 1, !dbg !173
+// CHECK:STDOUT:   %.loc43_45 = load i16, ptr %my_i16.var, align 2, !dbg !174
+// CHECK:STDOUT:   %.loc43_53 = load i32, ptr %my_i32.var, align 4, !dbg !175
+// CHECK:STDOUT:   %.loc43_61 = load i64, ptr %my_i64.var, align 8, !dbg !176
+// CHECK:STDOUT:   call void @_CUse.Main(i8 %.loc43_7, i16 %.loc43_14, i32 %.loc43_22, i64 %.loc43_30, i8 %.loc43_38, i16 %.loc43_45, i32 %.loc43_53, i64 %.loc43_61), !dbg !177
+// CHECK:STDOUT:   call void @"_COp.5f42013854821c52:core.Destroy.Core"(ptr %my_i64.var), !dbg !166
+// CHECK:STDOUT:   call void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %my_i32.var), !dbg !163
+// CHECK:STDOUT:   call void @"_COp.91f16365ca65525e:core.Destroy.Core"(ptr %my_i16.var), !dbg !160
+// CHECK:STDOUT:   call void @"_COp.136cbc434fe80552:core.Destroy.Core"(ptr %my_i8.var), !dbg !157
+// CHECK:STDOUT:   call void @"_COp.8423634153f3fb6c:core.Destroy.Core"(ptr %my_u64.var), !dbg !154
+// CHECK:STDOUT:   call void @"_COp.77fcb7cb81390d28:core.Destroy.Core"(ptr %my_u32.var), !dbg !151
+// CHECK:STDOUT:   call void @"_COp.d38552e658b9d7ce:core.Destroy.Core"(ptr %my_u16.var), !dbg !148
+// CHECK:STDOUT:   call void @"_COp.becc1452ae1d9d7b:core.Destroy.Core"(ptr %my_u8.var), !dbg !145
+// CHECK:STDOUT:   ret void, !dbg !178
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.5f42013854821c52:core.Destroy.Core"(ptr %self) #0 !dbg !132 {
+// CHECK:STDOUT: define weak_odr void @"_COp.5f42013854821c52:core.Destroy.Core"(ptr %self) #0 !dbg !179 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !137
+// CHECK:STDOUT:   ret void, !dbg !181
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %self) #0 !dbg !138 {
+// CHECK:STDOUT: define weak_odr void @"_COp.70db2d92ffddbef7:core.Destroy.Core"(ptr %self) #0 !dbg !183 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !143
+// CHECK:STDOUT:   ret void, !dbg !185
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.8423634153f3fb6c:core.Destroy.Core"(ptr %self) #0 !dbg !144 {
+// CHECK:STDOUT: define weak_odr void @"_COp.8423634153f3fb6c:core.Destroy.Core"(ptr %self) #0 !dbg !187 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !149
+// CHECK:STDOUT:   ret void, !dbg !189
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define weak_odr void @"_COp.77fcb7cb81390d28:core.Destroy.Core"(ptr %self) #0 !dbg !150 {
+// CHECK:STDOUT: define weak_odr void @"_COp.77fcb7cb81390d28:core.Destroy.Core"(ptr %self) #0 !dbg !191 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   ret void, !dbg !155
+// CHECK:STDOUT:   ret void, !dbg !193
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
@@ -389,166 +389,166 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // 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.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!5}
+// CHECK:STDOUT: !llvm.module.flags = !{!205, !206, !207, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!210}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_ints.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "GetU8", linkageName: "_CGetU8.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{!15}
-// CHECK:STDOUT: !15 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_unsigned)
-// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 27, scope: !12)
-// CHECK:STDOUT: !17 = !DILocation(line: 6, column: 20, scope: !12)
-// CHECK:STDOUT: !18 = !{!19, !19, i64 0}
-// CHECK:STDOUT: !19 = !{!"p1 omnipotent char", !20, i64 0}
-// CHECK:STDOUT: !20 = !{!"any pointer", !10, i64 0}
-// CHECK:STDOUT: !21 = !{!10, !10, i64 0}
-// CHECK:STDOUT: !22 = distinct !DISubprogram(name: "GetU16", linkageName: "_CGetU16.Main", scope: null, file: !1, line: 7, type: !23, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !23 = !DISubroutineType(types: !24)
-// CHECK:STDOUT: !24 = !{!25}
-// CHECK:STDOUT: !25 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_unsigned)
-// CHECK:STDOUT: !26 = !DILocation(line: 7, column: 29, scope: !22)
-// CHECK:STDOUT: !27 = !DILocation(line: 7, column: 22, scope: !22)
-// CHECK:STDOUT: !28 = !{!29, !29, i64 0}
-// CHECK:STDOUT: !29 = !{!"p1 short", !20, i64 0}
-// CHECK:STDOUT: !30 = !{!31, !31, i64 0}
-// CHECK:STDOUT: !31 = !{!"short", !10, i64 0}
-// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "GetU32", linkageName: "_CGetU32.Main", scope: null, file: !1, line: 8, type: !33, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !33 = !DISubroutineType(types: !34)
-// CHECK:STDOUT: !34 = !{!35}
-// CHECK:STDOUT: !35 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_unsigned)
-// CHECK:STDOUT: !36 = !DILocation(line: 8, column: 29, scope: !32)
-// CHECK:STDOUT: !37 = !DILocation(line: 8, column: 22, scope: !32)
-// CHECK:STDOUT: !38 = distinct !DISubprogram(name: "GetU64", linkageName: "_CGetU64.Main", scope: null, file: !1, line: 9, type: !39, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !39 = !DISubroutineType(types: !40)
-// CHECK:STDOUT: !40 = !{!41}
-// CHECK:STDOUT: !41 = !DIBasicType(name: "int", size: 64, encoding: DW_ATE_unsigned)
-// CHECK:STDOUT: !42 = !DILocation(line: 9, column: 29, scope: !38)
-// CHECK:STDOUT: !43 = !DILocation(line: 9, column: 22, scope: !38)
-// CHECK:STDOUT: !44 = distinct !DISubprogram(name: "GetI8", linkageName: "_CGetI8.Main", scope: null, file: !1, line: 11, type: !45, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !45 = !DISubroutineType(types: !46)
-// CHECK:STDOUT: !46 = !{!47}
-// CHECK:STDOUT: !47 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !48 = !DILocation(line: 11, column: 27, scope: !44)
-// CHECK:STDOUT: !49 = !DILocation(line: 11, column: 20, scope: !44)
-// CHECK:STDOUT: !50 = distinct !DISubprogram(name: "GetI16", linkageName: "_CGetI16.Main", scope: null, file: !1, line: 12, type: !51, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !51 = !DISubroutineType(types: !52)
-// CHECK:STDOUT: !52 = !{!53}
-// CHECK:STDOUT: !53 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !54 = !DILocation(line: 12, column: 29, scope: !50)
-// CHECK:STDOUT: !55 = !DILocation(line: 12, column: 22, scope: !50)
-// CHECK:STDOUT: !56 = distinct !DISubprogram(name: "GetI32", linkageName: "_CGetI32.Main", scope: null, file: !1, line: 13, type: !57, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !57 = !DISubroutineType(types: !58)
-// CHECK:STDOUT: !58 = !{!59}
-// CHECK:STDOUT: !59 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !60 = !DILocation(line: 13, column: 29, scope: !56)
-// CHECK:STDOUT: !61 = !DILocation(line: 13, column: 22, scope: !56)
-// CHECK:STDOUT: !62 = distinct !DISubprogram(name: "GetI64", linkageName: "_CGetI64.Main", scope: null, file: !1, line: 14, type: !63, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !63 = !DISubroutineType(types: !64)
-// CHECK:STDOUT: !64 = !{!65}
-// CHECK:STDOUT: !65 = !DIBasicType(name: "int", size: 64, encoding: DW_ATE_signed)
-// CHECK:STDOUT: !66 = !DILocation(line: 14, column: 29, scope: !62)
-// CHECK:STDOUT: !67 = !DILocation(line: 14, column: 22, scope: !62)
-// CHECK:STDOUT: !68 = distinct !DISubprogram(name: "Lets", linkageName: "_CLets.Main", scope: null, file: !1, line: 18, type: !69, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !69 = !DISubroutineType(types: !70)
-// CHECK:STDOUT: !70 = !{null}
-// CHECK:STDOUT: !71 = !DILocation(line: 19, column: 19, scope: !68)
-// CHECK:STDOUT: !72 = !DILocation(line: 20, column: 21, scope: !68)
-// CHECK:STDOUT: !73 = !DILocation(line: 24, column: 19, scope: !68)
-// CHECK:STDOUT: !74 = !DILocation(line: 25, column: 21, scope: !68)
-// CHECK:STDOUT: !75 = !DILocation(line: 21, column: 21, scope: !68)
-// CHECK:STDOUT: !76 = !DILocation(line: 22, column: 21, scope: !68)
-// CHECK:STDOUT: !77 = !DILocation(line: 26, column: 21, scope: !68)
-// CHECK:STDOUT: !78 = !DILocation(line: 27, column: 21, scope: !68)
-// CHECK:STDOUT: !79 = !DILocation(line: 29, column: 3, scope: !68)
-// CHECK:STDOUT: !80 = !DILocation(line: 18, column: 1, scope: !68)
-// CHECK:STDOUT: !81 = distinct !DISubprogram(name: "Op", linkageName: "_COp.91f16365ca65525e:core.Destroy.Core", scope: null, file: !1, line: 25, type: !82, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !84)
-// CHECK:STDOUT: !82 = !DISubroutineType(types: !83)
-// CHECK:STDOUT: !83 = !{null, !53}
-// CHECK:STDOUT: !84 = !{!85}
-// CHECK:STDOUT: !85 = !DILocalVariable(arg: 1, scope: !81, type: !53)
-// CHECK:STDOUT: !86 = !DILocation(line: 25, column: 21, scope: !81)
-// CHECK:STDOUT: !87 = distinct !DISubprogram(name: "Op", linkageName: "_COp.136cbc434fe80552:core.Destroy.Core", scope: null, file: !1, line: 24, type: !88, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !90)
-// CHECK:STDOUT: !88 = !DISubroutineType(types: !89)
-// CHECK:STDOUT: !89 = !{null, !47}
-// CHECK:STDOUT: !90 = !{!91}
-// CHECK:STDOUT: !91 = !DILocalVariable(arg: 1, scope: !87, type: !47)
-// CHECK:STDOUT: !92 = !DILocation(line: 24, column: 19, scope: !87)
-// CHECK:STDOUT: !93 = distinct !DISubprogram(name: "Op", linkageName: "_COp.d38552e658b9d7ce:core.Destroy.Core", scope: null, file: !1, line: 20, type: !94, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !96)
-// CHECK:STDOUT: !94 = !DISubroutineType(types: !95)
-// CHECK:STDOUT: !95 = !{null, !25}
-// CHECK:STDOUT: !96 = !{!97}
-// CHECK:STDOUT: !97 = !DILocalVariable(arg: 1, scope: !93, type: !25)
-// CHECK:STDOUT: !98 = !DILocation(line: 20, column: 21, scope: !93)
-// CHECK:STDOUT: !99 = distinct !DISubprogram(name: "Op", linkageName: "_COp.becc1452ae1d9d7b:core.Destroy.Core", scope: null, file: !1, line: 19, type: !100, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !102)
-// CHECK:STDOUT: !100 = !DISubroutineType(types: !101)
-// CHECK:STDOUT: !101 = !{null, !15}
-// CHECK:STDOUT: !102 = !{!103}
-// CHECK:STDOUT: !103 = !DILocalVariable(arg: 1, scope: !99, type: !15)
-// CHECK:STDOUT: !104 = !DILocation(line: 19, column: 19, scope: !99)
-// CHECK:STDOUT: !105 = distinct !DISubprogram(name: "Vars", linkageName: "_CVars.Main", scope: null, file: !1, line: 32, type: !69, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !106 = !DILocation(line: 33, column: 3, scope: !105)
-// CHECK:STDOUT: !107 = !DILocation(line: 34, column: 3, scope: !105)
-// CHECK:STDOUT: !108 = !DILocation(line: 35, column: 3, scope: !105)
-// CHECK:STDOUT: !109 = !DILocation(line: 36, column: 3, scope: !105)
-// CHECK:STDOUT: !110 = !DILocation(line: 38, column: 3, scope: !105)
-// CHECK:STDOUT: !111 = !DILocation(line: 39, column: 3, scope: !105)
-// CHECK:STDOUT: !112 = !DILocation(line: 40, column: 3, scope: !105)
-// CHECK:STDOUT: !113 = !DILocation(line: 41, column: 3, scope: !105)
-// CHECK:STDOUT: !114 = !DILocation(line: 33, column: 19, scope: !105)
-// CHECK:STDOUT: !115 = !DILocation(line: 34, column: 21, scope: !105)
-// CHECK:STDOUT: !116 = !DILocation(line: 35, column: 21, scope: !105)
-// CHECK:STDOUT: !117 = !DILocation(line: 36, column: 21, scope: !105)
-// CHECK:STDOUT: !118 = !DILocation(line: 38, column: 19, scope: !105)
-// CHECK:STDOUT: !119 = !DILocation(line: 39, column: 21, scope: !105)
-// CHECK:STDOUT: !120 = !DILocation(line: 40, column: 21, scope: !105)
-// CHECK:STDOUT: !121 = !DILocation(line: 41, column: 21, scope: !105)
-// CHECK:STDOUT: !122 = !DILocation(line: 43, column: 7, scope: !105)
-// CHECK:STDOUT: !123 = !DILocation(line: 43, column: 14, scope: !105)
-// CHECK:STDOUT: !124 = !DILocation(line: 43, column: 22, scope: !105)
-// CHECK:STDOUT: !125 = !DILocation(line: 43, column: 30, scope: !105)
-// CHECK:STDOUT: !126 = !DILocation(line: 43, column: 38, scope: !105)
-// CHECK:STDOUT: !127 = !DILocation(line: 43, column: 45, scope: !105)
-// CHECK:STDOUT: !128 = !DILocation(line: 43, column: 53, scope: !105)
-// CHECK:STDOUT: !129 = !DILocation(line: 43, column: 61, scope: !105)
-// CHECK:STDOUT: !130 = !DILocation(line: 43, column: 3, scope: !105)
-// CHECK:STDOUT: !131 = !DILocation(line: 32, column: 1, scope: !105)
-// CHECK:STDOUT: !132 = distinct !DISubprogram(name: "Op", linkageName: "_COp.5f42013854821c52:core.Destroy.Core", scope: null, file: !1, line: 41, type: !133, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !135)
-// CHECK:STDOUT: !133 = !DISubroutineType(types: !134)
-// CHECK:STDOUT: !134 = !{null, !65}
-// CHECK:STDOUT: !135 = !{!136}
-// CHECK:STDOUT: !136 = !DILocalVariable(arg: 1, scope: !132, type: !65)
-// CHECK:STDOUT: !137 = !DILocation(line: 41, column: 3, scope: !132)
-// CHECK:STDOUT: !138 = distinct !DISubprogram(name: "Op", linkageName: "_COp.70db2d92ffddbef7:core.Destroy.Core", scope: null, file: !1, line: 40, type: !139, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !141)
-// CHECK:STDOUT: !139 = !DISubroutineType(types: !140)
-// CHECK:STDOUT: !140 = !{null, !59}
-// CHECK:STDOUT: !141 = !{!142}
-// CHECK:STDOUT: !142 = !DILocalVariable(arg: 1, scope: !138, type: !59)
-// CHECK:STDOUT: !143 = !DILocation(line: 40, column: 3, scope: !138)
-// CHECK:STDOUT: !144 = distinct !DISubprogram(name: "Op", linkageName: "_COp.8423634153f3fb6c:core.Destroy.Core", scope: null, file: !1, line: 36, type: !145, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !147)
-// CHECK:STDOUT: !145 = !DISubroutineType(types: !146)
-// CHECK:STDOUT: !146 = !{null, !41}
-// CHECK:STDOUT: !147 = !{!148}
-// CHECK:STDOUT: !148 = !DILocalVariable(arg: 1, scope: !144, type: !41)
-// CHECK:STDOUT: !149 = !DILocation(line: 36, column: 3, scope: !144)
-// CHECK:STDOUT: !150 = distinct !DISubprogram(name: "Op", linkageName: "_COp.77fcb7cb81390d28:core.Destroy.Core", scope: null, file: !1, line: 35, type: !151, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !153)
-// CHECK:STDOUT: !151 = !DISubroutineType(types: !152)
-// CHECK:STDOUT: !152 = !{null, !35}
-// CHECK:STDOUT: !153 = !{!154}
-// CHECK:STDOUT: !154 = !DILocalVariable(arg: 1, scope: !150, type: !35)
-// CHECK:STDOUT: !155 = !DILocation(line: 35, column: 3, scope: !150)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !4 = !DIFile(filename: "import_ints.carbon", directory: "")
+// CHECK:STDOUT: !5 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !6 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_unsigned)
+// CHECK:STDOUT: !7 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_unsigned)
+// CHECK:STDOUT: !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_unsigned)
+// CHECK:STDOUT: !9 = !DIBasicType(name: "int", size: 64, encoding: DW_ATE_unsigned)
+// CHECK:STDOUT: !10 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !11 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !13 = !DIBasicType(name: "int", size: 64, encoding: DW_ATE_signed)
+// CHECK:STDOUT: !14 = !{!6}
+// CHECK:STDOUT: !15 = !DISubroutineType(types: !14)
+// CHECK:STDOUT: !19 = !{!7}
+// CHECK:STDOUT: !20 = !DISubroutineType(types: !19)
+// CHECK:STDOUT: !21 = !{!8}
+// CHECK:STDOUT: !22 = !DISubroutineType(types: !21)
+// CHECK:STDOUT: !23 = !{!9}
+// CHECK:STDOUT: !24 = !DISubroutineType(types: !23)
+// CHECK:STDOUT: !25 = !{!10}
+// CHECK:STDOUT: !26 = !DISubroutineType(types: !25)
+// CHECK:STDOUT: !27 = !{!11}
+// CHECK:STDOUT: !28 = !DISubroutineType(types: !27)
+// CHECK:STDOUT: !29 = !{!12}
+// CHECK:STDOUT: !30 = !DISubroutineType(types: !29)
+// CHECK:STDOUT: !31 = !{!13}
+// CHECK:STDOUT: !32 = !DISubroutineType(types: !31)
+// CHECK:STDOUT: !35 = !{null}
+// CHECK:STDOUT: !36 = !DISubroutineType(types: !35)
+// CHECK:STDOUT: !37 = !{null, !11}
+// CHECK:STDOUT: !38 = !DISubroutineType(types: !37)
+// CHECK:STDOUT: !39 = !{null, !10}
+// CHECK:STDOUT: !40 = !DISubroutineType(types: !39)
+// CHECK:STDOUT: !41 = !{null, !7}
+// CHECK:STDOUT: !42 = !DISubroutineType(types: !41)
+// CHECK:STDOUT: !43 = !{null, !6}
+// CHECK:STDOUT: !44 = !DISubroutineType(types: !43)
+// CHECK:STDOUT: !45 = !{null, !13}
+// CHECK:STDOUT: !46 = !DISubroutineType(types: !45)
+// CHECK:STDOUT: !47 = !{null, !12}
+// CHECK:STDOUT: !48 = !DISubroutineType(types: !47)
+// CHECK:STDOUT: !49 = !{null, !9}
+// CHECK:STDOUT: !50 = !DISubroutineType(types: !49)
+// CHECK:STDOUT: !51 = !{null, !8}
+// CHECK:STDOUT: !52 = !DISubroutineType(types: !51)
+// CHECK:STDOUT: !53 = distinct !DISubprogram(name: "GetU8", linkageName: "_CGetU8.Main", scope: null, file: !4, line: 6, type: !15, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !56 = !DILocation(line: 6, column: 27, scope: !53)
+// CHECK:STDOUT: !57 = !DILocation(line: 6, column: 20, scope: !53)
+// CHECK:STDOUT: !58 = distinct !DISubprogram(name: "GetU16", linkageName: "_CGetU16.Main", scope: null, file: !4, line: 7, type: !20, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !61 = !DILocation(line: 7, column: 29, scope: !58)
+// CHECK:STDOUT: !62 = !DILocation(line: 7, column: 22, scope: !58)
+// CHECK:STDOUT: !63 = distinct !DISubprogram(name: "GetU32", linkageName: "_CGetU32.Main", scope: null, file: !4, line: 8, type: !22, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !66 = !DILocation(line: 8, column: 29, scope: !63)
+// CHECK:STDOUT: !67 = !DILocation(line: 8, column: 22, scope: !63)
+// CHECK:STDOUT: !68 = distinct !DISubprogram(name: "GetU64", linkageName: "_CGetU64.Main", scope: null, file: !4, line: 9, type: !24, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !71 = !DILocation(line: 9, column: 29, scope: !68)
+// CHECK:STDOUT: !72 = !DILocation(line: 9, column: 22, scope: !68)
+// CHECK:STDOUT: !73 = distinct !DISubprogram(name: "GetI8", linkageName: "_CGetI8.Main", scope: null, file: !4, line: 11, type: !26, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !76 = !DILocation(line: 11, column: 27, scope: !73)
+// CHECK:STDOUT: !77 = !DILocation(line: 11, column: 20, scope: !73)
+// CHECK:STDOUT: !78 = distinct !DISubprogram(name: "GetI16", linkageName: "_CGetI16.Main", scope: null, file: !4, line: 12, type: !28, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !81 = !DILocation(line: 12, column: 29, scope: !78)
+// CHECK:STDOUT: !82 = !DILocation(line: 12, column: 22, scope: !78)
+// CHECK:STDOUT: !83 = distinct !DISubprogram(name: "GetI32", linkageName: "_CGetI32.Main", scope: null, file: !4, line: 13, type: !30, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !86 = !DILocation(line: 13, column: 29, scope: !83)
+// CHECK:STDOUT: !87 = !DILocation(line: 13, column: 22, scope: !83)
+// CHECK:STDOUT: !88 = distinct !DISubprogram(name: "GetI64", linkageName: "_CGetI64.Main", scope: null, file: !4, line: 14, type: !32, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !91 = !DILocation(line: 14, column: 29, scope: !88)
+// CHECK:STDOUT: !92 = !DILocation(line: 14, column: 22, scope: !88)
+// CHECK:STDOUT: !93 = distinct !DISubprogram(name: "Lets", linkageName: "_CLets.Main", scope: null, file: !4, line: 18, type: !36, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !94 = !DILocation(line: 19, column: 19, scope: !93)
+// CHECK:STDOUT: !97 = !DILocation(line: 20, column: 21, scope: !93)
+// CHECK:STDOUT: !100 = !DILocation(line: 21, column: 21, scope: !93)
+// CHECK:STDOUT: !103 = !DILocation(line: 22, column: 21, scope: !93)
+// CHECK:STDOUT: !106 = !DILocation(line: 24, column: 19, scope: !93)
+// CHECK:STDOUT: !109 = !DILocation(line: 25, column: 21, scope: !93)
+// CHECK:STDOUT: !112 = !DILocation(line: 26, column: 21, scope: !93)
+// CHECK:STDOUT: !115 = !DILocation(line: 27, column: 21, scope: !93)
+// CHECK:STDOUT: !126 = !DILocation(line: 29, column: 3, scope: !93)
+// CHECK:STDOUT: !127 = !DILocation(line: 18, column: 1, scope: !93)
+// CHECK:STDOUT: !128 = distinct !DISubprogram(name: "Op", linkageName: "_COp.91f16365ca65525e:core.Destroy.Core", scope: null, file: !4, line: 25, type: !38, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !131)
+// CHECK:STDOUT: !129 = !DILocalVariable(arg: 1, scope: !128, type: !11)
+// CHECK:STDOUT: !130 = !DILocation(line: 25, column: 21, scope: !128)
+// CHECK:STDOUT: !131 = !{!129}
+// CHECK:STDOUT: !132 = distinct !DISubprogram(name: "Op", linkageName: "_COp.136cbc434fe80552:core.Destroy.Core", scope: null, file: !4, line: 24, type: !40, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !135)
+// CHECK:STDOUT: !133 = !DILocalVariable(arg: 1, scope: !132, type: !10)
+// CHECK:STDOUT: !134 = !DILocation(line: 24, column: 19, scope: !132)
+// CHECK:STDOUT: !135 = !{!133}
+// CHECK:STDOUT: !136 = distinct !DISubprogram(name: "Op", linkageName: "_COp.d38552e658b9d7ce:core.Destroy.Core", scope: null, file: !4, line: 20, type: !42, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !139)
+// CHECK:STDOUT: !137 = !DILocalVariable(arg: 1, scope: !136, type: !7)
+// CHECK:STDOUT: !138 = !DILocation(line: 20, column: 21, scope: !136)
+// CHECK:STDOUT: !139 = !{!137}
+// CHECK:STDOUT: !140 = distinct !DISubprogram(name: "Op", linkageName: "_COp.becc1452ae1d9d7b:core.Destroy.Core", scope: null, file: !4, line: 19, type: !44, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !143)
+// CHECK:STDOUT: !141 = !DILocalVariable(arg: 1, scope: !140, type: !6)
+// CHECK:STDOUT: !142 = !DILocation(line: 19, column: 19, scope: !140)
+// CHECK:STDOUT: !143 = !{!141}
+// CHECK:STDOUT: !144 = distinct !DISubprogram(name: "Vars", linkageName: "_CVars.Main", scope: null, file: !4, line: 32, type: !36, spFlags: DISPFlagDefinition, unit: !5)
+// CHECK:STDOUT: !145 = !DILocation(line: 33, column: 3, scope: !144)
+// CHECK:STDOUT: !146 = !DILocation(line: 33, column: 19, scope: !144)
+// CHECK:STDOUT: !148 = !DILocation(line: 34, column: 3, scope: !144)
+// CHECK:STDOUT: !149 = !DILocation(line: 34, column: 21, scope: !144)
+// CHECK:STDOUT: !151 = !DILocation(line: 35, column: 3, scope: !144)
+// CHECK:STDOUT: !152 = !DILocation(line: 35, column: 21, scope: !144)
+// CHECK:STDOUT: !154 = !DILocation(line: 36, column: 3, scope: !144)
+// CHECK:STDOUT: !155 = !DILocation(line: 36, column: 21, scope: !144)
+// CHECK:STDOUT: !157 = !DILocation(line: 38, column: 3, scope: !144)
+// CHECK:STDOUT: !158 = !DILocation(line: 38, column: 19, scope: !144)
+// CHECK:STDOUT: !160 = !DILocation(line: 39, column: 3, scope: !144)
+// CHECK:STDOUT: !161 = !DILocation(line: 39, column: 21, scope: !144)
+// CHECK:STDOUT: !163 = !DILocation(line: 40, column: 3, scope: !144)
+// CHECK:STDOUT: !164 = !DILocation(line: 40, column: 21, scope: !144)
+// CHECK:STDOUT: !166 = !DILocation(line: 41, column: 3, scope: !144)
+// CHECK:STDOUT: !167 = !DILocation(line: 41, column: 21, scope: !144)
+// CHECK:STDOUT: !169 = !DILocation(line: 43, column: 7, scope: !144)
+// CHECK:STDOUT: !170 = !DILocation(line: 43, column: 14, scope: !144)
+// CHECK:STDOUT: !171 = !DILocation(line: 43, column: 22, scope: !144)
+// CHECK:STDOUT: !172 = !DILocation(line: 43, column: 30, scope: !144)
+// CHECK:STDOUT: !173 = !DILocation(line: 43, column: 38, scope: !144)
+// CHECK:STDOUT: !174 = !DILocation(line: 43, column: 45, scope: !144)
+// CHECK:STDOUT: !175 = !DILocation(line: 43, column: 53, scope: !144)
+// CHECK:STDOUT: !176 = !DILocation(line: 43, column: 61, scope: !144)
+// CHECK:STDOUT: !177 = !DILocation(line: 43, column: 3, scope: !144)
+// CHECK:STDOUT: !178 = !DILocation(line: 32, column: 1, scope: !144)
+// CHECK:STDOUT: !179 = distinct !DISubprogram(name: "Op", linkageName: "_COp.5f42013854821c52:core.Destroy.Core", scope: null, file: !4, line: 41, type: !46, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !182)
+// CHECK:STDOUT: !180 = !DILocalVariable(arg: 1, scope: !179, type: !13)
+// CHECK:STDOUT: !181 = !DILocation(line: 41, column: 3, scope: !179)
+// CHECK:STDOUT: !182 = !{!180}
+// CHECK:STDOUT: !183 = distinct !DISubprogram(name: "Op", linkageName: "_COp.70db2d92ffddbef7:core.Destroy.Core", scope: null, file: !4, line: 40, type: !48, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !186)
+// CHECK:STDOUT: !184 = !DILocalVariable(arg: 1, scope: !183, type: !12)
+// CHECK:STDOUT: !185 = !DILocation(line: 40, column: 3, scope: !183)
+// CHECK:STDOUT: !186 = !{!184}
+// CHECK:STDOUT: !187 = distinct !DISubprogram(name: "Op", linkageName: "_COp.8423634153f3fb6c:core.Destroy.Core", scope: null, file: !4, line: 36, type: !50, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !190)
+// CHECK:STDOUT: !188 = !DILocalVariable(arg: 1, scope: !187, type: !9)
+// CHECK:STDOUT: !189 = !DILocation(line: 36, column: 3, scope: !187)
+// CHECK:STDOUT: !190 = !{!188}
+// CHECK:STDOUT: !191 = distinct !DISubprogram(name: "Op", linkageName: "_COp.77fcb7cb81390d28:core.Destroy.Core", scope: null, file: !4, line: 35, type: !52, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !194)
+// CHECK:STDOUT: !192 = !DILocalVariable(arg: 1, scope: !191, type: !8)
+// CHECK:STDOUT: !193 = !DILocation(line: 35, column: 3, scope: !191)
+// CHECK:STDOUT: !194 = !{!192}
+// CHECK:STDOUT: !195 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !196 = !{!"omnipotent char", !195, i64 0}
+// CHECK:STDOUT: !197 = !{!"any pointer", !196, i64 0}
+// CHECK:STDOUT: !198 = !{!"p1 omnipotent char", !197, i64 0}
+// CHECK:STDOUT: !199 = !{!198, !198, i64 0}
+// CHECK:STDOUT: !200 = !{!196, !196, i64 0}
+// CHECK:STDOUT: !201 = !{!"short", !196, i64 0}
+// CHECK:STDOUT: !202 = !{!"p1 short", !197, i64 0}
+// CHECK:STDOUT: !203 = !{!202, !202, i64 0}
+// CHECK:STDOUT: !204 = !{!201, !201, i64 0}
+// CHECK:STDOUT: !205 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !206 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !207 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !208 = !{!"int", !196, i64 0}
+// CHECK:STDOUT: !209 = !{!"__libc_errno", !208, i64 0}
+// CHECK:STDOUT: !210 = !{!209, !208, i64 0}
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'import_class.carbon'
@@ -559,43 +559,43 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // 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 !12 {
+// CHECK:STDOUT: define void @_CGetX.Main(ptr sret([16 x i8]) %return) #0 !dbg !215 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z4Makev.carbon_thunk.(ptr %return), !dbg !16
-// CHECK:STDOUT:   ret void, !dbg !17
+// CHECK:STDOUT:   call void @_Z4Makev.carbon_thunk.(ptr %return), !dbg !218
+// CHECK:STDOUT:   ret void, !dbg !219
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
 // 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 !18
-// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !18
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !231
+// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8, !tbaa !231
 // 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: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CLet.Main() #0 !dbg !21 {
+// CHECK:STDOUT: define void @_CLet.Main() #0 !dbg !220 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %.loc9_27.1.temp = alloca [16 x i8], align 8, !dbg !24
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_27.1.temp), !dbg !24
-// CHECK:STDOUT:   call void @_Z4Makev.carbon_thunk.(ptr %.loc9_27.1.temp), !dbg !24
-// CHECK:STDOUT:   call void @_ZN1XD1Ev(ptr %.loc9_27.1.temp), !dbg !24
-// CHECK:STDOUT:   ret void, !dbg !25
+// CHECK:STDOUT:   %.loc9_27.1.temp = alloca [16 x i8], align 8, !dbg !221
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %.loc9_27.1.temp), !dbg !221
+// CHECK:STDOUT:   call void @_Z4Makev.carbon_thunk.(ptr %.loc9_27.1.temp), !dbg !221
+// CHECK:STDOUT:   call void @_ZN1XD1Ev(ptr %.loc9_27.1.temp), !dbg !221
+// CHECK:STDOUT:   ret void, !dbg !224
 // 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 #2
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nounwind
-// CHECK:STDOUT: define void @_CVar.Main() #0 !dbg !26 {
+// CHECK:STDOUT: define void @_CVar.Main() #0 !dbg !225 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 8, !dbg !27
-// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !27
-// CHECK:STDOUT:   call void @_Z4Makev.carbon_thunk.(ptr %_.var), !dbg !28
-// CHECK:STDOUT:   call void @_ZN1XD1Ev(ptr %_.var), !dbg !27
-// CHECK:STDOUT:   ret void, !dbg !29
+// CHECK:STDOUT:   %_.var = alloca [16 x i8], align 8, !dbg !226
+// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !226
+// CHECK:STDOUT:   call void @_Z4Makev.carbon_thunk.(ptr %_.var), !dbg !227
+// CHECK:STDOUT:   call void @_ZN1XD1Ev(ptr %_.var), !dbg !226
+// CHECK:STDOUT:   ret void, !dbg !229
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
@@ -612,40 +612,40 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // 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.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!212}
+// CHECK:STDOUT: !llvm.module.flags = !{!205, !206, !207, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!210}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "import_class.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "GetX", linkageName: "_CGetX.Main", scope: null, file: !1, line: 6, type: !13, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{!15}
-// CHECK:STDOUT: !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !16 = !DILocation(line: 6, column: 29, scope: !12)
-// CHECK:STDOUT: !17 = !DILocation(line: 6, column: 22, scope: !12)
-// CHECK:STDOUT: !18 = !{!19, !19, i64 0}
-// CHECK:STDOUT: !19 = !{!"p1 _ZTS1X", !20, i64 0}
-// CHECK:STDOUT: !20 = !{!"any pointer", !10, i64 0}
-// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "Let", linkageName: "_CLet.Main", scope: null, file: !1, line: 8, type: !22, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !22 = !DISubroutineType(types: !23)
-// CHECK:STDOUT: !23 = !{null}
-// CHECK:STDOUT: !24 = !DILocation(line: 9, column: 18, scope: !21)
-// CHECK:STDOUT: !25 = !DILocation(line: 8, column: 1, scope: !21)
-// CHECK:STDOUT: !26 = distinct !DISubprogram(name: "Var", linkageName: "_CVar.Main", scope: null, file: !1, line: 12, type: !22, spFlags: DISPFlagDefinition, unit: !0)
-// CHECK:STDOUT: !27 = !DILocation(line: 13, column: 3, scope: !26)
-// CHECK:STDOUT: !28 = !DILocation(line: 13, column: 18, scope: !26)
-// CHECK:STDOUT: !29 = !DILocation(line: 12, column: 1, scope: !26)
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !35 = !{null}
+// CHECK:STDOUT: !36 = !DISubroutineType(types: !35)
+// CHECK:STDOUT: !195 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !196 = !{!"omnipotent char", !195, i64 0}
+// CHECK:STDOUT: !197 = !{!"any pointer", !196, i64 0}
+// CHECK:STDOUT: !205 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !206 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !207 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !208 = !{!"int", !196, i64 0}
+// CHECK:STDOUT: !209 = !{!"__libc_errno", !208, i64 0}
+// CHECK:STDOUT: !210 = !{!209, !208, i64 0}
+// CHECK:STDOUT: !211 = !DIFile(filename: "import_class.carbon", directory: "")
+// CHECK:STDOUT: !212 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !211, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !213 = !{!16}
+// CHECK:STDOUT: !214 = !DISubroutineType(types: !213)
+// CHECK:STDOUT: !215 = distinct !DISubprogram(name: "GetX", linkageName: "_CGetX.Main", scope: null, file: !211, line: 6, type: !214, spFlags: DISPFlagDefinition, unit: !212)
+// CHECK:STDOUT: !218 = !DILocation(line: 6, column: 29, scope: !215)
+// CHECK:STDOUT: !219 = !DILocation(line: 6, column: 22, scope: !215)
+// CHECK:STDOUT: !220 = distinct !DISubprogram(name: "Let", linkageName: "_CLet.Main", scope: null, file: !211, line: 8, type: !36, spFlags: DISPFlagDefinition, unit: !212)
+// CHECK:STDOUT: !221 = !DILocation(line: 9, column: 18, scope: !220)
+// CHECK:STDOUT: !224 = !DILocation(line: 8, column: 1, scope: !220)
+// CHECK:STDOUT: !225 = distinct !DISubprogram(name: "Var", linkageName: "_CVar.Main", scope: null, file: !211, line: 12, type: !36, spFlags: DISPFlagDefinition, unit: !212)
+// CHECK:STDOUT: !226 = !DILocation(line: 13, column: 3, scope: !225)
+// CHECK:STDOUT: !227 = !DILocation(line: 13, column: 18, scope: !225)
+// CHECK:STDOUT: !229 = !DILocation(line: 12, column: 1, scope: !225)
+// CHECK:STDOUT: !230 = !{!"p1 _ZTS1X", !197, i64 0}
+// CHECK:STDOUT: !231 = !{!230, !230, i64 0}
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; ---
 // CHECK:STDOUT: ; ModuleID = 'indirect_return_with_args.carbon'
@@ -657,10 +657,10 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // 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 !12 {
+// CHECK:STDOUT: define void @_CCall.Main(ptr sret({}) %return, ptr %x) #0 !dbg !239 {
 // CHECK:STDOUT: entry:
-// CHECK:STDOUT:   call void @_Z1f1D.carbon_thunk._(ptr %x, ptr %return), !dbg !18
-// CHECK:STDOUT:   ret void, !dbg !19
+// CHECK:STDOUT:   call void @_Z1f1D.carbon_thunk._(ptr %x, ptr %return), !dbg !245
+// CHECK:STDOUT:   ret void, !dbg !246
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
 // CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
@@ -670,10 +670,10 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // 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 !20
-// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !23
-// CHECK:STDOUT:   %1 = load ptr, ptr %return.addr, align 8, !tbaa !23
-// CHECK:STDOUT:   %2 = load ptr, ptr %.addr, align 8, !tbaa !20
+// CHECK:STDOUT:   store ptr %0, ptr %.addr, align 8, !tbaa !249
+// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8, !tbaa !251
+// CHECK:STDOUT:   %1 = load ptr, ptr %return.addr, align 8, !tbaa !251
+// CHECK:STDOUT:   %2 = load ptr, ptr %.addr, align 8, !tbaa !249
 // CHECK:STDOUT:   call void @_Z1f1D()
 // CHECK:STDOUT:   ret void
 // CHECK:STDOUT: }
@@ -684,33 +684,33 @@ fn Call(x: Cpp.D) -> Cpp.C {
 // 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.dbg.cu = !{!0}
-// CHECK:STDOUT: !llvm.module.flags = !{!2, !3, !4, !5, !6}
-// CHECK:STDOUT: !llvm.errno.tbaa = !{!7}
+// CHECK:STDOUT: !llvm.dbg.cu = !{!234}
+// CHECK:STDOUT: !llvm.module.flags = !{!205, !206, !207, !2, !3}
+// CHECK:STDOUT: !llvm.errno.tbaa = !{!210}
 // CHECK:STDOUT:
-// CHECK:STDOUT: !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
-// CHECK:STDOUT: !1 = !DIFile(filename: "indirect_return_with_args.carbon", directory: "")
-// CHECK:STDOUT: !2 = !{i32 8, !"PIC Level", i32 2}
-// CHECK:STDOUT: !3 = !{i32 7, !"PIE Level", i32 2}
-// CHECK:STDOUT: !4 = !{i32 7, !"uwtable", i32 2}
-// CHECK:STDOUT: !5 = !{i32 7, !"Dwarf Version", i32 5}
-// CHECK:STDOUT: !6 = !{i32 2, !"Debug Info Version", i32 3}
-// CHECK:STDOUT: !7 = !{!8, !9, i64 0}
-// CHECK:STDOUT: !8 = !{!"__libc_errno", !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: "Call", linkageName: "_CCall.Main", scope: null, file: !1, line: 10, type: !13, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !16)
-// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
-// CHECK:STDOUT: !14 = !{!15, !15}
-// CHECK:STDOUT: !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
-// CHECK:STDOUT: !16 = !{!17}
-// CHECK:STDOUT: !17 = !DILocalVariable(arg: 1, scope: !12, type: !15)
-// CHECK:STDOUT: !18 = !DILocation(line: 11, column: 10, scope: !12)
-// CHECK:STDOUT: !19 = !DILocation(line: 11, column: 3, scope: !12)
-// CHECK:STDOUT: !20 = !{!21, !21, i64 0}
-// CHECK:STDOUT: !21 = !{!"p1 _ZTS1D", !22, i64 0}
-// CHECK:STDOUT: !22 = !{!"any pointer", !10, i64 0}
-// CHECK:STDOUT: !23 = !{!24, !24, i64 0}
-// CHECK:STDOUT: !24 = !{!"p1 _ZTS1C", !22, i64 0}
+// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
+// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
+// CHECK:STDOUT: !16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
+// CHECK:STDOUT: !195 = !{!"Simple C++ TBAA"}
+// CHECK:STDOUT: !196 = !{!"omnipotent char", !195, i64 0}
+// CHECK:STDOUT: !197 = !{!"any pointer", !196, i64 0}
+// CHECK:STDOUT: !205 = !{i32 8, !"PIC Level", i32 2}
+// CHECK:STDOUT: !206 = !{i32 7, !"PIE Level", i32 2}
+// CHECK:STDOUT: !207 = !{i32 7, !"uwtable", i32 2}
+// CHECK:STDOUT: !208 = !{!"int", !196, i64 0}
+// CHECK:STDOUT: !209 = !{!"__libc_errno", !208, i64 0}
+// CHECK:STDOUT: !210 = !{!209, !208, i64 0}
+// CHECK:STDOUT: !233 = !DIFile(filename: "indirect_return_with_args.carbon", directory: "")
+// CHECK:STDOUT: !234 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !233, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+// CHECK:STDOUT: !235 = !{!16, !16}
+// CHECK:STDOUT: !236 = !DISubroutineType(types: !235)
+// CHECK:STDOUT: !239 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !233, line: 10, type: !236, spFlags: DISPFlagDefinition, unit: !234, retainedNodes: !247)
+// CHECK:STDOUT: !240 = !DILocalVariable(arg: 1, scope: !239, type: !16)
+// CHECK:STDOUT: !245 = !DILocation(line: 11, column: 10, scope: !239)
+// CHECK:STDOUT: !246 = !DILocation(line: 11, column: 3, scope: !239)
+// CHECK:STDOUT: !247 = !{!240}
+// CHECK:STDOUT: !248 = !{!"p1 _ZTS1D", !197, i64 0}
+// CHECK:STDOUT: !249 = !{!248, !248, i64 0}
+// CHECK:STDOUT: !250 = !{!"p1 _ZTS1C", !197, i64 0}
+// CHECK:STDOUT: !251 = !{!250, !250, i64 0}
 // CHECK:STDOUT: