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carbon-lang/toolchain/lower/testdata/impl/thunk.carbon
T
Dana Jansens 7beb29f8b2 Use a fallback loc for diagnostics generated on canonical insts (#7967) 
We allow using `InstId` as a `LocId` for diagnostics, which works great
in `handle_*` functions, where we are working with non-canonical insts.
And convert and pattern matching often are given non-canonical insts,
which they can use, or pull apart to find some other inst, and use those
as a location for diagnostics. However these operations can also be
called with canonical insts, which have no location. In that case if we
need to diagnose an error, it ends up not being attached to any code at
all. Since we always have a `LocId` somewhere up the call stack, pass it
along and in these places that handle canonical instructions too, use
`GetInstLocationOrFallback()` to get a valid location for diagnostics.

This is also similar to what eval does with its fallback `LocId`.

The result is that many diagnostics now have a location where they had
none before. It also means some insts don't get `<elided>` in formatted
semir for not having a location at all and thus not being in range.
2026-10-15 19:03:10 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/impl/thunk.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/impl/thunk.carbon
// --- thunk.carbon
library "[[@TEST_NAME]]";
class A { var a: i32; }
class B { var b: i32; }
class C { var c: i32; }
impl A as Core.ImplicitAs(B) {
fn Convert(self: A) -> B { return {.b = self.a}; }
}
impl B as Core.ImplicitAs(C) {
fn Convert(self: B) -> C { return {.c = self.b}; }
}
interface I {
fn F(a: A) -> C;
}
impl () as I {
fn F(b: B) -> B { return {.b = b.b}; }
}
fn Test(a: A) -> C {
return ().(I.F)(a);
}
// --- generic_thunk.carbon
library "[[@TEST_NAME]]";
class A {}
class B {
impl as Core.ImplicitAs(A) {
fn Convert(unused self) -> A { return {}; }
}
}
interface I(T: type) {
fn F(self, x: B) -> A;
}
class C(U: type) {}
impl forall [V: type] C(V) as I(V) {
fn F(unused self, _: A) -> B { return {}; }
}
fn Call(c: C(()), b: B) -> A {
return c.(I(()).F)(b);
}
fn CallGeneric[T: I(())](c: T, b: B) -> A {
return c.F(b);
}
fn CallCallGeneric(c: C(()), b: B) -> A {
return CallGeneric(c, b);
}
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'thunk.carbon'
// CHECK:STDOUT: source_filename = "thunk.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @"_CConvert.A.Main:ImplicitAs.a6a60dfee2d7d273.Core"(ptr sret({ i32 }) %return, ptr %self) #0 !dbg !28 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc9_47.1.a = getelementptr inbounds nuw { i32 }, ptr %self, i32 0, i32 0, !dbg !33
// CHECK:STDOUT: %.loc9_47.2 = load i32, ptr %.loc9_47.1.a, align 4, !dbg !33
// CHECK:STDOUT: %.loc9_49.2.b = getelementptr inbounds nuw { i32 }, ptr %return, i32 0, i32 0, !dbg !34
// CHECK:STDOUT: store i32 %.loc9_47.2, ptr %.loc9_49.2.b, align 4, !dbg !34
// CHECK:STDOUT: ret void, !dbg !35
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @"_CConvert.B.Main:ImplicitAs.9522ff908e97e267.Core"(ptr sret({ i32 }) %return, ptr %self) #0 !dbg !37 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc12_47.1.b = getelementptr inbounds nuw { i32 }, ptr %self, i32 0, i32 0, !dbg !42
// CHECK:STDOUT: %.loc12_47.2 = load i32, ptr %.loc12_47.1.b, align 4, !dbg !42
// CHECK:STDOUT: %.loc12_49.2.c = getelementptr inbounds nuw { i32 }, ptr %return, i32 0, i32 0, !dbg !43
// CHECK:STDOUT: store i32 %.loc12_47.2, ptr %.loc12_49.2.c, align 4, !dbg !43
// CHECK:STDOUT: ret void, !dbg !44
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @"_CF.61ea2aba74ab3bf1:I.Main"(ptr sret({ i32 }) %return, ptr %b) #0 !dbg !46 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc20_35.1.b = getelementptr inbounds nuw { i32 }, ptr %b, i32 0, i32 0, !dbg !51
// CHECK:STDOUT: %.loc20_35.2 = load i32, ptr %.loc20_35.1.b, align 4, !dbg !51
// CHECK:STDOUT: %.loc20_37.2.b = getelementptr inbounds nuw { i32 }, ptr %return, i32 0, i32 0, !dbg !52
// CHECK:STDOUT: store i32 %.loc20_35.2, ptr %.loc20_37.2.b, align 4, !dbg !52
// CHECK:STDOUT: ret void, !dbg !53
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define weak_odr void @"_CF:thunk:I.6a2feaaa6331eb92.Main:61ea2aba74ab3bf1:I.Main"(ptr sret({ i32 }) %return, ptr %a) #1 !dbg !55 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc20_19.1.temp = alloca { i32 }, align 4, !dbg !58
// CHECK:STDOUT: %.loc20_19.2.temp = alloca { i32 }, align 4, !dbg !58
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc20_19.1.temp), !dbg !58
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc20_19.2.temp), !dbg !58
// CHECK:STDOUT: call void @"_CConvert.A.Main:ImplicitAs.a6a60dfee2d7d273.Core"(ptr %.loc20_19.2.temp, ptr %a), !dbg !58
// CHECK:STDOUT: call void @"_CF.61ea2aba74ab3bf1:I.Main"(ptr %.loc20_19.1.temp, ptr %.loc20_19.2.temp), !dbg !58
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.9522ff908e97e267.Core"(ptr %return, ptr %.loc20_19.1.temp), !dbg !58
// CHECK:STDOUT: call void @"_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %.loc20_19.1.temp), !dbg !58
// CHECK:STDOUT: call void @"_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %.loc20_19.2.temp), !dbg !58
// CHECK:STDOUT: ret void, !dbg !58
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %self) #0 !dbg !60 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !62
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSubobjectDestroy.5bf3a215c2b17be3:core.Destroy.Core"(ptr %self) #0 !dbg !64 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc20.b = getelementptr inbounds nuw { i32 }, ptr %self, i32 0, i32 0, !dbg !66
// CHECK:STDOUT: call void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %.loc20.b), !dbg !66
// CHECK:STDOUT: ret void, !dbg !66
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.5bf3a215c2b17be3:core.Destroy.Core"(ptr %self) #0 !dbg !68 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CSubobjectDestroy.5bf3a215c2b17be3:core.Destroy.Core"(ptr %self), !dbg !70
// CHECK:STDOUT: ret void, !dbg !70
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSubobjectDestroy.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %self) #0 !dbg !72 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc20.b = getelementptr inbounds nuw { i32 }, ptr %self, i32 0, i32 0, !dbg !74
// CHECK:STDOUT: call void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %.loc20.b), !dbg !74
// CHECK:STDOUT: ret void, !dbg !74
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %self) #0 !dbg !76 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CSubobjectDestroy.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %self), !dbg !78
// CHECK:STDOUT: ret void, !dbg !78
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CTest.Main(ptr sret({ i32 }) %return, ptr %a) #0 !dbg !80 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc24_20.1.temp = alloca { i32 }, align 4, !dbg !86
// CHECK:STDOUT: %.loc24_20.2.temp = alloca { i32 }, align 4, !dbg !86
// CHECK:STDOUT: %.loc24_19.1.temp = alloca { i32 }, align 4, !dbg !85
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc24_20.1.temp), !dbg !86
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc24_20.2.temp), !dbg !86
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc24_19.1.temp), !dbg !85
// CHECK:STDOUT: call void @"_CConvert.A.Main:ImplicitAs.a6a60dfee2d7d273.Core"(ptr %.loc24_19.1.temp, ptr %a), !dbg !85
// CHECK:STDOUT: call void @"_CF.61ea2aba74ab3bf1:I.Main"(ptr %.loc24_20.2.temp, ptr %.loc24_19.1.temp), !dbg !86
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.9522ff908e97e267.Core"(ptr %return, ptr %.loc24_20.2.temp), !dbg !87
// CHECK:STDOUT: call void @"_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %.loc24_20.2.temp), !dbg !86
// CHECK:STDOUT: call void @"_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %.loc24_19.1.temp), !dbg !85
// CHECK:STDOUT: ret void, !dbg !87
// 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: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @"_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core", { 0, 1, 3, 2 }
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 4, 3, 2, 1, 0 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { alwaysinline nounwind }
// CHECK:STDOUT: attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!19}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !18 = !DIFile(filename: "thunk.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 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !22 = !{!21, !21}
// CHECK:STDOUT: !23 = !DISubroutineType(types: !22)
// CHECK:STDOUT: !24 = !{null, !20}
// CHECK:STDOUT: !25 = !DISubroutineType(types: !24)
// CHECK:STDOUT: !26 = !{null, !21}
// CHECK:STDOUT: !27 = !DISubroutineType(types: !26)
// CHECK:STDOUT: !28 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.A.Main:ImplicitAs.a6a60dfee2d7d273.Core", scope: null, file: !18, line: 9, type: !23, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !36)
// CHECK:STDOUT: !29 = !DILocalVariable(arg: 1, scope: !28, type: !21)
// CHECK:STDOUT: !33 = !DILocation(line: 9, column: 43, scope: !28)
// CHECK:STDOUT: !34 = !DILocation(line: 9, column: 37, scope: !28)
// CHECK:STDOUT: !35 = !DILocation(line: 9, column: 30, scope: !28)
// CHECK:STDOUT: !36 = !{!29}
// CHECK:STDOUT: !37 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.B.Main:ImplicitAs.9522ff908e97e267.Core", scope: null, file: !18, line: 12, type: !23, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !45)
// CHECK:STDOUT: !38 = !DILocalVariable(arg: 1, scope: !37, type: !21)
// CHECK:STDOUT: !42 = !DILocation(line: 12, column: 43, scope: !37)
// CHECK:STDOUT: !43 = !DILocation(line: 12, column: 37, scope: !37)
// CHECK:STDOUT: !44 = !DILocation(line: 12, column: 30, scope: !37)
// CHECK:STDOUT: !45 = !{!38}
// CHECK:STDOUT: !46 = distinct !DISubprogram(name: "F", linkageName: "_CF.61ea2aba74ab3bf1:I.Main", scope: null, file: !18, line: 20, type: !23, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !54)
// CHECK:STDOUT: !47 = !DILocalVariable(arg: 1, scope: !46, type: !21)
// CHECK:STDOUT: !51 = !DILocation(line: 20, column: 34, scope: !46)
// CHECK:STDOUT: !52 = !DILocation(line: 20, column: 28, scope: !46)
// CHECK:STDOUT: !53 = !DILocation(line: 20, column: 21, scope: !46)
// CHECK:STDOUT: !54 = !{!47}
// CHECK:STDOUT: !55 = distinct !DISubprogram(name: "F", linkageName: "_CF:thunk:I.6a2feaaa6331eb92.Main:61ea2aba74ab3bf1:I.Main", scope: null, file: !18, line: 20, type: !23, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !59)
// CHECK:STDOUT: !56 = !DILocalVariable(arg: 1, scope: !55, type: !21)
// CHECK:STDOUT: !58 = !DILocation(line: 20, column: 3, scope: !55)
// CHECK:STDOUT: !59 = !{!56}
// CHECK:STDOUT: !60 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core", scope: null, file: !18, line: 20, type: !25, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !63)
// CHECK:STDOUT: !61 = !DILocalVariable(arg: 1, scope: !60, type: !20)
// CHECK:STDOUT: !62 = !DILocation(line: 20, column: 3, scope: !60)
// CHECK:STDOUT: !63 = !{!61}
// CHECK:STDOUT: !64 = distinct !DISubprogram(name: "SubobjectDestroy", linkageName: "_CSubobjectDestroy.5bf3a215c2b17be3:core.Destroy.Core", scope: null, file: !18, line: 20, type: !27, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !67)
// CHECK:STDOUT: !65 = !DILocalVariable(arg: 1, scope: !64, type: !21)
// CHECK:STDOUT: !66 = !DILocation(line: 20, column: 3, scope: !64)
// CHECK:STDOUT: !67 = !{!65}
// CHECK:STDOUT: !68 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.5bf3a215c2b17be3:core.Destroy.Core", scope: null, file: !18, line: 20, type: !27, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !71)
// CHECK:STDOUT: !69 = !DILocalVariable(arg: 1, scope: !68, type: !21)
// CHECK:STDOUT: !70 = !DILocation(line: 20, column: 3, scope: !68)
// CHECK:STDOUT: !71 = !{!69}
// CHECK:STDOUT: !72 = distinct !DISubprogram(name: "SubobjectDestroy", linkageName: "_CSubobjectDestroy.8c4b83ecd900f1ea:core.Destroy.Core", scope: null, file: !18, line: 20, type: !27, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !75)
// CHECK:STDOUT: !73 = !DILocalVariable(arg: 1, scope: !72, type: !21)
// CHECK:STDOUT: !74 = !DILocation(line: 20, column: 3, scope: !72)
// CHECK:STDOUT: !75 = !{!73}
// CHECK:STDOUT: !76 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core", scope: null, file: !18, line: 20, type: !27, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !79)
// CHECK:STDOUT: !77 = !DILocalVariable(arg: 1, scope: !76, type: !21)
// CHECK:STDOUT: !78 = !DILocation(line: 20, column: 3, scope: !76)
// CHECK:STDOUT: !79 = !{!77}
// CHECK:STDOUT: !80 = distinct !DISubprogram(name: "Test", linkageName: "_CTest.Main", scope: null, file: !18, line: 23, type: !23, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !88)
// CHECK:STDOUT: !81 = !DILocalVariable(arg: 1, scope: !80, type: !21)
// CHECK:STDOUT: !85 = !DILocation(line: 24, column: 19, scope: !80)
// CHECK:STDOUT: !86 = !DILocation(line: 24, column: 10, scope: !80)
// CHECK:STDOUT: !87 = !DILocation(line: 24, column: 3, scope: !80)
// CHECK:STDOUT: !88 = !{!81}
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'generic_thunk.carbon'
// CHECK:STDOUT: source_filename = "generic_thunk.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @A.val.loc7_45 = internal constant {} zeroinitializer
// CHECK:STDOUT: @B.val.loc18_43 = internal constant {} zeroinitializer
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @"_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core"(ptr sret({}) %return, ptr %self) #0 !dbg !93 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %return, ptr align 1 @A.val.loc7_45, i64 0, i1 false), !dbg !98
// CHECK:STDOUT: ret void, !dbg !98
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.cb8adced19392b99:core.Destroy.Core"(ptr %self) #0 !dbg !100 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !102
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %self) #0 !dbg !104 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !106
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.5a23cc09585c55d2:core.Destroy.Core"(ptr %self) #0 !dbg !108 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !110
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CCall.Main(ptr sret({}) %return, ptr %c, ptr %b) #0 !dbg !112 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc22_23.1.temp = alloca {}, align 1, !dbg !119
// CHECK:STDOUT: %.loc22_23.3.temp = alloca {}, align 1, !dbg !119
// CHECK:STDOUT: %.loc22_22.1.temp = alloca {}, align 1, !dbg !120
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc22_23.1.temp), !dbg !119
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc22_23.3.temp), !dbg !119
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc22_22.1.temp), !dbg !120
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core"(ptr %.loc22_22.1.temp, ptr %b), !dbg !120
// CHECK:STDOUT: call void @"_CF.C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f"(ptr %.loc22_23.3.temp, ptr %c, ptr %.loc22_22.1.temp), !dbg !119
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core"(ptr %return, ptr %.loc22_23.3.temp), !dbg !121
// CHECK:STDOUT: call void @"_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %.loc22_23.3.temp), !dbg !119
// CHECK:STDOUT: call void @"_CSelfDestruct.5a23cc09585c55d2:core.Destroy.Core"(ptr %.loc22_22.1.temp), !dbg !120
// CHECK:STDOUT: ret void, !dbg !121
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CCallCallGeneric.Main(ptr sret({}) %return, ptr %c, ptr %b) #0 !dbg !123 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CCallGeneric.Main.e6730b2ec192c142(ptr %return, ptr %c, ptr %b), !dbg !132
// CHECK:STDOUT: ret void, !dbg !133
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @"_CF.C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f"(ptr sret({}) %return, ptr %self, ptr %_) #0 !dbg !135 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %return, ptr align 1 @B.val.loc18_43, i64 0, i1 false), !dbg !142
// CHECK:STDOUT: ret void, !dbg !142
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CCallGeneric.Main.e6730b2ec192c142(ptr sret({}) %return, ptr %c, ptr %b) #0 !dbg !144 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CF:thunk:I.e2e8ace3e0ca3527.Main:C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f"(ptr %return, ptr %c, ptr %b), !dbg !151
// CHECK:STDOUT: ret void, !dbg !153
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define linkonce_odr void @"_CF:thunk:I.e2e8ace3e0ca3527.Main:C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f"(ptr sret({}) %return, ptr %self, ptr %x) #2 !dbg !155 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc18_32.2.temp = alloca {}, align 1, !dbg !159
// CHECK:STDOUT: %.loc18_32.3.temp = alloca {}, align 1, !dbg !159
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc18_32.2.temp), !dbg !159
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc18_32.3.temp), !dbg !159
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core"(ptr %.loc18_32.3.temp, ptr %x), !dbg !159
// CHECK:STDOUT: call void @"_CF.C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f"(ptr %.loc18_32.2.temp, ptr %self, ptr %.loc18_32.3.temp), !dbg !159
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core"(ptr %return, ptr %.loc18_32.2.temp), !dbg !159
// CHECK:STDOUT: call void @"_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core"(ptr %.loc18_32.2.temp), !dbg !159
// CHECK:STDOUT: call void @"_CSelfDestruct.5a23cc09585c55d2:core.Destroy.Core"(ptr %.loc18_32.3.temp), !dbg !159
// CHECK:STDOUT: ret void, !dbg !159
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 0, 1, 4, 3, 2 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #2 = { alwaysinline nounwind }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!90}
// CHECK:STDOUT: !llvm.module.flags = !{!2, !3}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !22 = !{!21, !21}
// CHECK:STDOUT: !23 = !DISubroutineType(types: !22)
// CHECK:STDOUT: !26 = !{null, !21}
// CHECK:STDOUT: !27 = !DISubroutineType(types: !26)
// CHECK:STDOUT: !89 = !DIFile(filename: "generic_thunk.carbon", directory: "")
// CHECK:STDOUT: !90 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !89, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !91 = !{!21, !21, !21}
// CHECK:STDOUT: !92 = !DISubroutineType(types: !91)
// CHECK:STDOUT: !93 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core", scope: null, file: !89, line: 7, type: !23, spFlags: DISPFlagDefinition, unit: !90, retainedNodes: !99)
// CHECK:STDOUT: !94 = !DILocalVariable(arg: 1, scope: !93, type: !21)
// CHECK:STDOUT: !98 = !DILocation(line: 7, column: 36, scope: !93)
// CHECK:STDOUT: !99 = !{!94}
// CHECK:STDOUT: !100 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.cb8adced19392b99:core.Destroy.Core", scope: null, file: !89, line: 18, type: !27, spFlags: DISPFlagDefinition, unit: !90, retainedNodes: !103)
// CHECK:STDOUT: !101 = !DILocalVariable(arg: 1, scope: !100, type: !21)
// CHECK:STDOUT: !102 = !DILocation(line: 18, column: 3, scope: !100)
// CHECK:STDOUT: !103 = !{!101}
// CHECK:STDOUT: !104 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.8c4b83ecd900f1ea:core.Destroy.Core", scope: null, file: !89, line: 18, type: !27, spFlags: DISPFlagDefinition, unit: !90, retainedNodes: !107)
// CHECK:STDOUT: !105 = !DILocalVariable(arg: 1, scope: !104, type: !21)
// CHECK:STDOUT: !106 = !DILocation(line: 18, column: 3, scope: !104)
// CHECK:STDOUT: !107 = !{!105}
// CHECK:STDOUT: !108 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.5a23cc09585c55d2:core.Destroy.Core", scope: null, file: !89, line: 18, type: !27, spFlags: DISPFlagDefinition, unit: !90, retainedNodes: !111)
// CHECK:STDOUT: !109 = !DILocalVariable(arg: 1, scope: !108, type: !21)
// CHECK:STDOUT: !110 = !DILocation(line: 18, column: 3, scope: !108)
// CHECK:STDOUT: !111 = !{!109}
// CHECK:STDOUT: !112 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !89, line: 21, type: !92, spFlags: DISPFlagDefinition, unit: !90, retainedNodes: !122)
// CHECK:STDOUT: !113 = !DILocalVariable(arg: 1, scope: !112, type: !21)
// CHECK:STDOUT: !114 = !DILocalVariable(arg: 2, scope: !112, type: !21)
// CHECK:STDOUT: !119 = !DILocation(line: 22, column: 10, scope: !112)
// CHECK:STDOUT: !120 = !DILocation(line: 22, column: 22, scope: !112)
// CHECK:STDOUT: !121 = !DILocation(line: 22, column: 3, scope: !112)
// CHECK:STDOUT: !122 = !{!113, !114}
// CHECK:STDOUT: !123 = distinct !DISubprogram(name: "CallCallGeneric", linkageName: "_CCallCallGeneric.Main", scope: null, file: !89, line: 29, type: !92, spFlags: DISPFlagDefinition, unit: !90, retainedNodes: !134)
// CHECK:STDOUT: !124 = !DILocalVariable(arg: 1, scope: !123, type: !21)
// CHECK:STDOUT: !125 = !DILocalVariable(arg: 2, scope: !123, type: !21)
// CHECK:STDOUT: !132 = !DILocation(line: 30, column: 10, scope: !123)
// CHECK:STDOUT: !133 = !DILocation(line: 30, column: 3, scope: !123)
// CHECK:STDOUT: !134 = !{!124, !125}
// CHECK:STDOUT: !135 = distinct !DISubprogram(name: "F", linkageName: "_CF.C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f", scope: null, file: !89, line: 18, type: !92, spFlags: DISPFlagDefinition, unit: !90, retainedNodes: !143)
// CHECK:STDOUT: !136 = !DILocalVariable(arg: 1, scope: !135, type: !21)
// CHECK:STDOUT: !137 = !DILocalVariable(arg: 2, scope: !135, type: !21)
// CHECK:STDOUT: !142 = !DILocation(line: 18, column: 34, scope: !135)
// CHECK:STDOUT: !143 = !{!136, !137}
// CHECK:STDOUT: !144 = distinct !DISubprogram(name: "CallGeneric", linkageName: "_CCallGeneric.Main.e6730b2ec192c142", scope: null, file: !89, line: 25, type: !92, spFlags: DISPFlagDefinition, unit: !90, retainedNodes: !154)
// CHECK:STDOUT: !145 = !DILocalVariable(arg: 1, scope: !144, type: !21)
// CHECK:STDOUT: !146 = !DILocalVariable(arg: 2, scope: !144, type: !21)
// CHECK:STDOUT: !151 = !DILocation(line: 26, column: 10, scope: !144)
// CHECK:STDOUT: !153 = !DILocation(line: 26, column: 3, scope: !144)
// CHECK:STDOUT: !154 = !{!145, !146}
// CHECK:STDOUT: !155 = distinct !DISubprogram(name: "F", linkageName: "_CF:thunk:I.e2e8ace3e0ca3527.Main:C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f", scope: null, file: !89, line: 18, type: !92, spFlags: DISPFlagDefinition, unit: !90, retainedNodes: !160)
// CHECK:STDOUT: !156 = !DILocalVariable(arg: 1, scope: !155, type: !21)
// CHECK:STDOUT: !157 = !DILocalVariable(arg: 2, scope: !155, type: !21)
// CHECK:STDOUT: !159 = !DILocation(line: 18, column: 3, scope: !155)
// CHECK:STDOUT: !160 = !{!156, !157}
// CHECK:STDOUT:
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