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carbon-lang/toolchain/lower/testdata/impl/thunk.carbon
T
Richard Smith cefa0397bb More fixes to package and library fingerprinting. (#7297) 
Fix import logic to make all imported packages be children of the
`NameScopeId::Package` scope. Previously, indirectly-imported packages
would end up as children of their importing package's scope, which
resulted in them not being treated as packages at all, and in particular
not being fingerprinted as packages.

Fixing that caused a failure in the fingerprinting logic as we started
to encounter packages with no correspoding import scopes. Instead of
looking for import scopes, use a simpler mechanism to map packages to
their package names, and clean up.

Unfortunately the latter change churns all the fingerprints again :(
Hopefully this is the last time for a while.
2026-06-04 17:41:46 +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: Self]() -> A { return {}; }
}
}
interface I(T:! type) {
fn F[self: Self](x: B) -> A;
}
class C(U:! type) {}
impl forall [V:! type] C(V) as I(V) {
fn F[unused self: 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: ; 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 !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc9_49.1.a = getelementptr inbounds nuw { i32 }, ptr %self, i32 0, i32 0, !dbg !10
// CHECK:STDOUT: %.loc9_49.2 = load i32, ptr %.loc9_49.1.a, align 4, !dbg !10
// CHECK:STDOUT: %.loc9_51.2.b = getelementptr inbounds nuw { i32 }, ptr %return, i32 0, i32 0, !dbg !11
// CHECK:STDOUT: store i32 %.loc9_49.2, ptr %.loc9_51.2.b, align 4, !dbg !11
// CHECK:STDOUT: ret void, !dbg !12
// 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 !13 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc12_49.1.b = getelementptr inbounds nuw { i32 }, ptr %self, i32 0, i32 0, !dbg !16
// CHECK:STDOUT: %.loc12_49.2 = load i32, ptr %.loc12_49.1.b, align 4, !dbg !16
// CHECK:STDOUT: %.loc12_51.2.c = getelementptr inbounds nuw { i32 }, ptr %return, i32 0, i32 0, !dbg !17
// CHECK:STDOUT: store i32 %.loc12_49.2, ptr %.loc12_51.2.c, align 4, !dbg !17
// CHECK:STDOUT: ret void, !dbg !18
// 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 !19 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc20_35.1.b = getelementptr inbounds nuw { i32 }, ptr %b, i32 0, i32 0, !dbg !22
// CHECK:STDOUT: %.loc20_35.2 = load i32, ptr %.loc20_35.1.b, align 4, !dbg !22
// CHECK:STDOUT: %.loc20_37.2.b = getelementptr inbounds nuw { i32 }, ptr %return, i32 0, i32 0, !dbg !23
// CHECK:STDOUT: store i32 %.loc20_35.2, ptr %.loc20_37.2.b, align 4, !dbg !23
// CHECK:STDOUT: ret void, !dbg !24
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define void @"_CF:thunk:I.4b54445be9b10a0e.Main:61ea2aba74ab3bf1:I.Main"(ptr sret({ i32 }) %return, ptr %a) #1 !dbg !25 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc20_19.1.temp = alloca { i32 }, align 4, !dbg !28
// CHECK:STDOUT: %.loc16_9.1.temp = alloca { i32 }, align 4, !dbg !29
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc20_19.1.temp), !dbg !28
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc16_9.1.temp), !dbg !29
// CHECK:STDOUT: call void @"_CConvert.A.Main:ImplicitAs.a6a60dfee2d7d273.Core"(ptr %.loc16_9.1.temp, ptr %a), !dbg !29
// CHECK:STDOUT: call void @"_CF.61ea2aba74ab3bf1:I.Main"(ptr %.loc20_19.1.temp, ptr %.loc16_9.1.temp), !dbg !28
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.9522ff908e97e267.Core"(ptr %return, ptr %.loc20_19.1.temp), !dbg !28
// CHECK:STDOUT: call void @"_COp.6c3865e9cbd9f6de:core.Destroy.Core"(ptr %.loc20_19.1.temp), !dbg !28
// CHECK:STDOUT: call void @"_COp.6c3865e9cbd9f6de:core.Destroy.Core"(ptr %.loc16_9.1.temp), !dbg !29
// CHECK:STDOUT: ret void, !dbg !28
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.5e27612b9dd31a14:core.Destroy.Core"(ptr %self) #0 !dbg !30 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !36
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.464513ac92508f77:core.Destroy.Core"(ptr %self) #0 !dbg !37 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !42
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.6c3865e9cbd9f6de:core.Destroy.Core"(ptr %self) #0 !dbg !43 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !46
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CTest.Main(ptr sret({ i32 }) %return, ptr %a) #0 !dbg !47 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc24_20.1.temp = alloca { i32 }, align 4, !dbg !50
// CHECK:STDOUT: %.loc24_20.2.temp = alloca { i32 }, align 4, !dbg !50
// CHECK:STDOUT: %.loc24_19.1.temp = alloca { i32 }, align 4, !dbg !51
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc24_20.1.temp), !dbg !50
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc24_20.2.temp), !dbg !50
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc24_19.1.temp), !dbg !51
// CHECK:STDOUT: call void @"_CConvert.A.Main:ImplicitAs.a6a60dfee2d7d273.Core"(ptr %.loc24_19.1.temp, ptr %a), !dbg !51
// CHECK:STDOUT: call void @"_CF.61ea2aba74ab3bf1:I.Main"(ptr %.loc24_20.2.temp, ptr %.loc24_19.1.temp), !dbg !50
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.9522ff908e97e267.Core"(ptr %return, ptr %.loc24_20.2.temp), !dbg !52
// CHECK:STDOUT: call void @"_COp.6c3865e9cbd9f6de:core.Destroy.Core"(ptr %.loc24_20.2.temp), !dbg !50
// CHECK:STDOUT: call void @"_COp.6c3865e9cbd9f6de:core.Destroy.Core"(ptr %.loc24_19.1.temp), !dbg !51
// CHECK:STDOUT: ret void, !dbg !52
// 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 @"_COp.6c3865e9cbd9f6de: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.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "thunk.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.A.Main:ImplicitAs.a6a60dfee2d7d273.Core", scope: null, file: !3, line: 9, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{!7, !7}
// CHECK:STDOUT: !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !8 = !{!9}
// CHECK:STDOUT: !9 = !DILocalVariable(arg: 1, scope: !4, type: !7)
// CHECK:STDOUT: !10 = !DILocation(line: 9, column: 45, scope: !4)
// CHECK:STDOUT: !11 = !DILocation(line: 9, column: 39, scope: !4)
// CHECK:STDOUT: !12 = !DILocation(line: 9, column: 32, scope: !4)
// CHECK:STDOUT: !13 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.B.Main:ImplicitAs.9522ff908e97e267.Core", scope: null, file: !3, line: 12, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !14)
// CHECK:STDOUT: !14 = !{!15}
// CHECK:STDOUT: !15 = !DILocalVariable(arg: 1, scope: !13, type: !7)
// CHECK:STDOUT: !16 = !DILocation(line: 12, column: 45, scope: !13)
// CHECK:STDOUT: !17 = !DILocation(line: 12, column: 39, scope: !13)
// CHECK:STDOUT: !18 = !DILocation(line: 12, column: 32, scope: !13)
// CHECK:STDOUT: !19 = distinct !DISubprogram(name: "F", linkageName: "_CF.61ea2aba74ab3bf1:I.Main", scope: null, file: !3, line: 20, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !20)
// CHECK:STDOUT: !20 = !{!21}
// CHECK:STDOUT: !21 = !DILocalVariable(arg: 1, scope: !19, type: !7)
// CHECK:STDOUT: !22 = !DILocation(line: 20, column: 34, scope: !19)
// CHECK:STDOUT: !23 = !DILocation(line: 20, column: 28, scope: !19)
// CHECK:STDOUT: !24 = !DILocation(line: 20, column: 21, scope: !19)
// CHECK:STDOUT: !25 = distinct !DISubprogram(name: "F", linkageName: "_CF:thunk:I.4b54445be9b10a0e.Main:61ea2aba74ab3bf1:I.Main", scope: null, file: !3, line: 20, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !26)
// CHECK:STDOUT: !26 = !{!27}
// CHECK:STDOUT: !27 = !DILocalVariable(arg: 1, scope: !25, type: !7)
// CHECK:STDOUT: !28 = !DILocation(line: 20, column: 3, scope: !25)
// CHECK:STDOUT: !29 = !DILocation(line: 16, column: 8, scope: !25)
// CHECK:STDOUT: !30 = distinct !DISubprogram(name: "Op", linkageName: "_COp.5e27612b9dd31a14:core.Destroy.Core", scope: null, file: !3, line: 20, type: !31, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !34)
// CHECK:STDOUT: !31 = !DISubroutineType(types: !32)
// CHECK:STDOUT: !32 = !{null, !33}
// CHECK:STDOUT: !33 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !34 = !{!35}
// CHECK:STDOUT: !35 = !DILocalVariable(arg: 1, scope: !30, type: !33)
// CHECK:STDOUT: !36 = !DILocation(line: 20, column: 3, scope: !30)
// CHECK:STDOUT: !37 = distinct !DISubprogram(name: "Op", linkageName: "_COp.464513ac92508f77:core.Destroy.Core", scope: null, file: !3, line: 20, type: !38, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !40)
// CHECK:STDOUT: !38 = !DISubroutineType(types: !39)
// CHECK:STDOUT: !39 = !{null, !7}
// CHECK:STDOUT: !40 = !{!41}
// CHECK:STDOUT: !41 = !DILocalVariable(arg: 1, scope: !37, type: !7)
// CHECK:STDOUT: !42 = !DILocation(line: 20, column: 3, scope: !37)
// CHECK:STDOUT: !43 = distinct !DISubprogram(name: "Op", linkageName: "_COp.6c3865e9cbd9f6de:core.Destroy.Core", scope: null, file: !3, line: 20, type: !38, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !44)
// CHECK:STDOUT: !44 = !{!45}
// CHECK:STDOUT: !45 = !DILocalVariable(arg: 1, scope: !43, type: !7)
// CHECK:STDOUT: !46 = !DILocation(line: 20, column: 3, scope: !43)
// CHECK:STDOUT: !47 = distinct !DISubprogram(name: "Test", linkageName: "_CTest.Main", scope: null, file: !3, line: 23, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !48)
// CHECK:STDOUT: !48 = !{!49}
// CHECK:STDOUT: !49 = !DILocalVariable(arg: 1, scope: !47, type: !7)
// CHECK:STDOUT: !50 = !DILocation(line: 24, column: 10, scope: !47)
// CHECK:STDOUT: !51 = !DILocation(line: 24, column: 19, scope: !47)
// CHECK:STDOUT: !52 = !DILocation(line: 24, column: 3, scope: !47)
// CHECK:STDOUT: ; ModuleID = 'generic_thunk.carbon'
// CHECK:STDOUT: source_filename = "generic_thunk.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @A.val.loc7_53 = internal constant {} zeroinitializer
// CHECK:STDOUT: @B.val.loc18_49 = 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 !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %return, ptr align 1 @A.val.loc7_53, i64 0, i1 false), !dbg !10
// CHECK:STDOUT: ret void, !dbg !10
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.6c3865e9cbd9f6de:core.Destroy.Core"(ptr %self) #0 !dbg !11 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !16
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.68011419f123494e:core.Destroy.Core"(ptr %self) #0 !dbg !17 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !20
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CCall.Main(ptr sret({}) %return, ptr %c, ptr %b) #0 !dbg !21 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc22_23.1.temp = alloca {}, align 1, !dbg !27
// CHECK:STDOUT: %.loc22_23.3.temp = alloca {}, align 1, !dbg !27
// CHECK:STDOUT: %.loc22_22.1.temp = alloca {}, align 1, !dbg !28
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc22_23.1.temp), !dbg !27
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc22_23.3.temp), !dbg !27
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc22_22.1.temp), !dbg !28
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core"(ptr %.loc22_22.1.temp, ptr %b), !dbg !28
// 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 !27
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core"(ptr %return, ptr %.loc22_23.3.temp), !dbg !29
// CHECK:STDOUT: call void @"_COp.6c3865e9cbd9f6de:core.Destroy.Core"(ptr %.loc22_23.3.temp), !dbg !27
// CHECK:STDOUT: call void @"_COp.68011419f123494e:core.Destroy.Core"(ptr %.loc22_22.1.temp), !dbg !28
// CHECK:STDOUT: ret void, !dbg !29
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CCallCallGeneric.Main(ptr sret({}) %return, ptr %c, ptr %b) #0 !dbg !30 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CCallGeneric.Main.311465f47f92d67a(ptr %return, ptr %c, ptr %b), !dbg !34
// CHECK:STDOUT: ret void, !dbg !35
// 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 !36 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %return, ptr align 1 @B.val.loc18_49, i64 0, i1 false), !dbg !40
// CHECK:STDOUT: ret void, !dbg !40
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CCallGeneric.Main.311465f47f92d67a(ptr sret({}) %return, ptr %c, ptr %b) #0 !dbg !41 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CF:thunk:I.eb750e4e5cfbbe32.Main:C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f"(ptr %return, ptr %c, ptr %b), !dbg !45
// CHECK:STDOUT: ret void, !dbg !46
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define linkonce_odr void @"_CF:thunk:I.eb750e4e5cfbbe32.Main:C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f"(ptr sret({}) %return, ptr %self, ptr %x) #2 !dbg !47 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc18_38.2.temp = alloca {}, align 1, !dbg !51
// CHECK:STDOUT: %.loc12_21.1.temp = alloca {}, align 1, !dbg !52
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc18_38.2.temp), !dbg !51
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc12_21.1.temp), !dbg !52
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core"(ptr %.loc12_21.1.temp, ptr %x), !dbg !52
// CHECK:STDOUT: call void @"_CF.C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f"(ptr %.loc18_38.2.temp, ptr %self, ptr %.loc12_21.1.temp), !dbg !51
// CHECK:STDOUT: call void @"_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core"(ptr %return, ptr %.loc18_38.2.temp), !dbg !51
// CHECK:STDOUT: call void @"_COp.6c3865e9cbd9f6de:core.Destroy.Core"(ptr %.loc18_38.2.temp), !dbg !51
// CHECK:STDOUT: call void @"_COp.68011419f123494e:core.Destroy.Core"(ptr %.loc12_21.1.temp), !dbg !52
// CHECK:STDOUT: ret void, !dbg !51
// 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.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "generic_thunk.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Convert", linkageName: "_CConvert.B.Main:ImplicitAs.bd4fb75a414fe858.Core", scope: null, file: !3, line: 7, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{!7, !7}
// CHECK:STDOUT: !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !8 = !{!9}
// CHECK:STDOUT: !9 = !DILocalVariable(arg: 1, scope: !4, type: !7)
// CHECK:STDOUT: !10 = !DILocation(line: 7, column: 44, scope: !4)
// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Op", linkageName: "_COp.6c3865e9cbd9f6de:core.Destroy.Core", scope: null, file: !3, line: 18, type: !12, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !14)
// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
// CHECK:STDOUT: !13 = !{null, !7}
// CHECK:STDOUT: !14 = !{!15}
// CHECK:STDOUT: !15 = !DILocalVariable(arg: 1, scope: !11, type: !7)
// CHECK:STDOUT: !16 = !DILocation(line: 18, column: 3, scope: !11)
// CHECK:STDOUT: !17 = distinct !DISubprogram(name: "Op", linkageName: "_COp.68011419f123494e:core.Destroy.Core", scope: null, file: !3, line: 12, type: !12, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !18)
// CHECK:STDOUT: !18 = !{!19}
// CHECK:STDOUT: !19 = !DILocalVariable(arg: 1, scope: !17, type: !7)
// CHECK:STDOUT: !20 = !DILocation(line: 12, column: 20, scope: !17)
// CHECK:STDOUT: !21 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !3, line: 21, type: !22, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !24)
// CHECK:STDOUT: !22 = !DISubroutineType(types: !23)
// CHECK:STDOUT: !23 = !{!7, !7, !7}
// CHECK:STDOUT: !24 = !{!25, !26}
// CHECK:STDOUT: !25 = !DILocalVariable(arg: 1, scope: !21, type: !7)
// CHECK:STDOUT: !26 = !DILocalVariable(arg: 2, scope: !21, type: !7)
// CHECK:STDOUT: !27 = !DILocation(line: 22, column: 10, scope: !21)
// CHECK:STDOUT: !28 = !DILocation(line: 22, column: 22, scope: !21)
// CHECK:STDOUT: !29 = !DILocation(line: 22, column: 3, scope: !21)
// CHECK:STDOUT: !30 = distinct !DISubprogram(name: "CallCallGeneric", linkageName: "_CCallCallGeneric.Main", scope: null, file: !3, line: 29, type: !22, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !31)
// CHECK:STDOUT: !31 = !{!32, !33}
// CHECK:STDOUT: !32 = !DILocalVariable(arg: 1, scope: !30, type: !7)
// CHECK:STDOUT: !33 = !DILocalVariable(arg: 2, scope: !30, type: !7)
// CHECK:STDOUT: !34 = !DILocation(line: 30, column: 10, scope: !30)
// CHECK:STDOUT: !35 = !DILocation(line: 30, column: 3, scope: !30)
// CHECK:STDOUT: !36 = distinct !DISubprogram(name: "F", linkageName: "_CF.C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f", scope: null, file: !3, line: 18, type: !22, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !37)
// CHECK:STDOUT: !37 = !{!38, !39}
// CHECK:STDOUT: !38 = !DILocalVariable(arg: 1, scope: !36, type: !7)
// CHECK:STDOUT: !39 = !DILocalVariable(arg: 2, scope: !36, type: !7)
// CHECK:STDOUT: !40 = !DILocation(line: 18, column: 40, scope: !36)
// CHECK:STDOUT: !41 = distinct !DISubprogram(name: "CallGeneric", linkageName: "_CCallGeneric.Main.311465f47f92d67a", scope: null, file: !3, line: 25, type: !22, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !42)
// CHECK:STDOUT: !42 = !{!43, !44}
// CHECK:STDOUT: !43 = !DILocalVariable(arg: 1, scope: !41, type: !7)
// CHECK:STDOUT: !44 = !DILocalVariable(arg: 2, scope: !41, type: !7)
// CHECK:STDOUT: !45 = !DILocation(line: 26, column: 10, scope: !41)
// CHECK:STDOUT: !46 = !DILocation(line: 26, column: 3, scope: !41)
// CHECK:STDOUT: !47 = distinct !DISubprogram(name: "F", linkageName: "_CF:thunk:I.eb750e4e5cfbbe32.Main:C.eb057aa32837c84e.Main:I.eb057aa32837c84e.Main.e43630e9a6c38c3f", scope: null, file: !3, line: 18, type: !22, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !48)
// CHECK:STDOUT: !48 = !{!49, !50}
// CHECK:STDOUT: !49 = !DILocalVariable(arg: 1, scope: !47, type: !7)
// CHECK:STDOUT: !50 = !DILocalVariable(arg: 2, scope: !47, type: !7)
// CHECK:STDOUT: !51 = !DILocation(line: 18, column: 3, scope: !47)
// CHECK:STDOUT: !52 = !DILocation(line: 12, column: 20, scope: !47)
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