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carbon-lang/toolchain/lower/testdata/interop/cpp/reference.carbon
T
Dana Jansens 24766e213e Defer evaluation of witnesses substituted while identifying a facet type (#7930) 
When identifying a facet type, defer evaluation of LookupImplWitnesses
by redirecting them to evaluate into IdentifiedWitness. Then the caller
of identify will need to substitute the IdentifiedWitnesses, either with
witnesses of their own, or with LookupImplWitness to cause a lookup
operation.

This allows:
- An `impl as` on a named constraint can subst the witnesses in
designators from the named constraint with a witness to the impl itself.
This prevents them from looking for and finding some other overlapping
impl. (This PR)
- Impl lookup to collect rewrite/equality requirements from all named
constraints and then use the impls it has already found to evaluate any
designators in those requirements instead of performing impl lookup
again (creating a cycle). (Done in
https://github.com/carbon-language/carbon-lang/pull/7944)
- Similarly, an `impl as` can collect impls and equality requirements
from all named constraints and verify them correctly by replacing
witnesses that should refer to the impl with the correct witness instead
of performing a lookup and finding an overlapping impl. (Done in
https://github.com/carbon-language/carbon-lang/pull/7937)
- ImplWitnessAccess to be able to find rewrites from a named constraint,
not just from the initial DeclaredFacetType. (TBD)

To do this we need to introduce the concept of "identified" specifics.
In order to identify a facet type, we must construct a specific for each
require decl in a named constraint. These specifics will have
IdentifiedWitnesses inside them, but their args would otherwise match a
specific for the require decl constructed in another context. To avoid
polluting the canonical specific namespace, we introduce a second
namespace of specifics that are "identified" since they are created by
identifying.

As we have introduced a new global state that modifies eval behaviour,
we must disable that state when resolving a specific (as per
https://github.com/carbon-language/carbon-lang/pull/7923). But inside an
"identified" specific, we preserve the behaviour so that the witnesses
modified by identify (through SubstPeriodSelf or through evaluating a
require specific) have their evaluation deferred.
2026-10-14 14:12:56 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/interop/cpp/reference.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/interop/cpp/reference.carbon
// ============================================================================
// Reference params
// ============================================================================
// --- pass_references.carbon
library "[[@TEST_NAME]]";
import Cpp inline '''
class C {};
auto TakeCRef(C&) -> void;
auto TakeCRRef(C&&) -> void;
auto TakeConstCRef(const C&) -> void;
auto TakeIntRef(int&) -> void;
auto TakeIntRRef(int&&) -> void;
auto TakeConstIntRef(const int&) -> void;
''';
fn PassRefs() {
var c: Cpp.C;
Cpp.TakeCRef(ref c);
Cpp.TakeCRRef({} as Cpp.C);
Cpp.TakeConstCRef(c);
var n: i32;
Cpp.TakeIntRef(ref n);
Cpp.TakeIntRRef(42 as i32);
Cpp.TakeConstIntRef(n);
}
// --- pass_references_via_thunk.carbon
library "[[@TEST_NAME]]";
import Cpp inline '''
class C {};
class ForceThunk {};
auto TakeCRef(C&, ForceThunk = {}) -> void;
auto TakeCRRef(const C&, ForceThunk = {}) -> void;
auto TakeConstCRef(const C&, ForceThunk = {}) -> void;
auto TakeIntRef(int&, ForceThunk = {}) -> void;
auto TakeIntRRef(int&&, ForceThunk = {}) -> void;
auto TakeConstIntRef(const int&, ForceThunk = {}) -> void;
''';
fn PassRefs() {
var c: Cpp.C;
Cpp.TakeCRef(ref c);
Cpp.TakeCRRef({} as Cpp.C);
Cpp.TakeConstCRef(c);
var n: i32;
Cpp.TakeIntRef(ref n);
Cpp.TakeIntRRef(42 as i32);
Cpp.TakeConstIntRef(n);
}
// ============================================================================
// Reference return values
// ============================================================================
// --- return_references.carbon
library "[[@TEST_NAME]]";
import Cpp inline '''
class C {};
auto ReturnCRef() -> C&;
auto ReturnCRRef() -> C&&;
auto ReturnConstCRef() -> const C&;
auto ReturnIntRef() -> int&;
auto ReturnIntRRef() -> int&&;
auto ReturnConstIntRef() -> const int&;
''';
fn GetRefs() {
let ref _: Cpp.C = Cpp.ReturnCRef();
let ref _: Cpp.C = Cpp.ReturnCRRef();
let ref _: const Cpp.C = Cpp.ReturnConstCRef();
let ref _: i32 = Cpp.ReturnIntRef();
let ref _: i32 = Cpp.ReturnIntRRef();
let ref _: const i32 = Cpp.ReturnConstIntRef();
}
// --- return_references_via_thunk.carbon
library "[[@TEST_NAME]]";
import Cpp inline '''
class C {};
class ForceThunk {};
auto ReturnCRef(ForceThunk = {}) -> C&;
auto ReturnCRRef(ForceThunk = {}) -> C&&;
auto ReturnConstCRef(ForceThunk = {}) -> const C&;
auto ReturnIntRef(ForceThunk = {}) -> int&;
auto ReturnIntRRef(ForceThunk = {}) -> int&&;
auto ReturnConstIntRef(ForceThunk = {}) -> const int&;
''';
fn GetRefs() {
let ref _: Cpp.C = Cpp.ReturnCRef();
let ref _: Cpp.C = Cpp.ReturnCRRef();
let ref _: const Cpp.C = Cpp.ReturnConstCRef();
let ref _: i32 = Cpp.ReturnIntRef();
let ref _: i32 = Cpp.ReturnIntRRef();
let ref _: const i32 = Cpp.ReturnConstIntRef();
}
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'pass_references.carbon'
// CHECK:STDOUT: source_filename = "pass_references.carbon"
// CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
// CHECK:STDOUT:
// CHECK:STDOUT: @C.val.loc19_20 = internal constant {} zeroinitializer
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CPassRefs.Main() #0 !dbg !30 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %c.var = alloca {}, align 1, !dbg !31
// CHECK:STDOUT: %_.var.1 = alloca {}, align 1, !dbg !36
// CHECK:STDOUT: %n.var = alloca i32, align 4, !dbg !40
// CHECK:STDOUT: %_.var.2 = alloca i32, align 4, !dbg !45
// CHECK:STDOUT: %.loc25_23.2.temp = alloca i32, align 4, !dbg !47
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %c.var), !dbg !31
// CHECK:STDOUT: call void @"_COp.51f3fb62cb986374:DefaultOrUnformed.Core.67b28f83c7cfd60c"(ptr %c.var), !dbg !31
// CHECK:STDOUT: call void @_Z8TakeCRefR1C(ptr %c.var), !dbg !35
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var.1), !dbg !36
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %_.var.1, ptr align 1 @C.val.loc19_20, i64 0, i1 false), !dbg !36
// CHECK:STDOUT: call void @_Z9TakeCRRefO1C.carbon_thunk.v(ptr %_.var.1), !dbg !37
// CHECK:STDOUT: call void @"_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core"(ptr %_.var.1), !dbg !36
// CHECK:STDOUT: call void @_Z13TakeConstCRefRK1C.carbon_thunk._(ptr %c.var), !dbg !39
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !40
// CHECK:STDOUT: store i32 poison, ptr %n.var, align 4, !dbg !40
// CHECK:STDOUT: call void @_Z10TakeIntRefRi(ptr %n.var), !dbg !44
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var.2), !dbg !45
// CHECK:STDOUT: store i32 42, ptr %_.var.2, align 4, !dbg !45
// CHECK:STDOUT: call void @_Z11TakeIntRRefOi.carbon_thunk.v(ptr %_.var.2), !dbg !46
// CHECK:STDOUT: call void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %_.var.2), !dbg !45
// CHECK:STDOUT: %.loc25_23.1 = load i32, ptr %n.var, align 4, !dbg !47
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc25_23.2.temp), !dbg !47
// CHECK:STDOUT: store i32 %.loc25_23.1, ptr %.loc25_23.2.temp, align 4, !dbg !47
// CHECK:STDOUT: call void @_Z15TakeConstIntRefRKi.carbon_thunk._(ptr %.loc25_23.2.temp), !dbg !48
// CHECK:STDOUT: call void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %.loc25_23.2.temp), !dbg !47
// CHECK:STDOUT: call void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %n.var), !dbg !40
// CHECK:STDOUT: call void @"_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core"(ptr %c.var), !dbg !31
// CHECK:STDOUT: ret void, !dbg !49
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
// CHECK:STDOUT: define internal void @_ZN1CC1Ev.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 !70
// CHECK:STDOUT: %0 = load ptr, ptr %return.addr, align 8, !tbaa !70
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define weak_odr void @"_COp:thunk:Default.dc3dd9c349162a91.Core:C.Cpp"(ptr sret({}) %return) #2 !dbg !50 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_ZN1CC1Ev.carbon_thunk.(ptr %return), !dbg !52
// CHECK:STDOUT: ret void, !dbg !52
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z8TakeCRefR1C(ptr noundef nonnull align 1 dereferenceable(1)) #3
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z9TakeCRRefO1C.carbon_thunk.v(ptr noundef %0) #4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !70
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !70
// CHECK:STDOUT: call void @_Z9TakeCRRefO1C(ptr noundef nonnull align 1 dereferenceable(1) %1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core"(ptr %self) #0 !dbg !53 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !55
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z13TakeConstCRefRK1C.carbon_thunk._(ptr noundef %0) #4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !70
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !70
// CHECK:STDOUT: call void @_Z13TakeConstCRefRK1C(ptr noundef nonnull align 1 dereferenceable(1) %1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z10TakeIntRefRi(ptr noundef nonnull align 4 dereferenceable(4)) #3
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z11TakeIntRRefOi.carbon_thunk.v(ptr noundef %0) #4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !74
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !74
// CHECK:STDOUT: call void @_Z11TakeIntRRefOi(ptr noundef nonnull align 4 dereferenceable(4) %1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %self) #0 !dbg !57 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !59
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z15TakeConstIntRefRKi.carbon_thunk._(ptr noundef %0) #4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !74
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !74
// CHECK:STDOUT: call void @_Z15TakeConstIntRefRKi(ptr noundef nonnull align 4 dereferenceable(4) %1)
// CHECK:STDOUT: ret void
// 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)) #5
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @"_COp.51f3fb62cb986374:DefaultOrUnformed.Core.67b28f83c7cfd60c"(ptr sret({}) %return) #0 !dbg !61 {
// CHECK:STDOUT: call void @"_COp:thunk:Default.dc3dd9c349162a91.Core:C.Cpp"(ptr %return), !dbg !64
// CHECK:STDOUT: ret void, !dbg !65
// 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) #5
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z9TakeCRRefO1C(ptr noundef nonnull align 1 dereferenceable(1)) #3
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z13TakeConstCRefRK1C(ptr noundef nonnull align 1 dereferenceable(1)) #3
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z11TakeIntRRefOi(ptr noundef nonnull align 4 dereferenceable(4)) #3
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z15TakeConstIntRefRKi(ptr noundef nonnull align 4 dereferenceable(4)) #3
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @"_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core", { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core", { 2, 1, 0 }
// 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 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 = { alwaysinline nounwind }
// 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: attributes #4 = { 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 #5 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!19}
// CHECK:STDOUT: !llvm.module.flags = !{!75, !76, !77, !2, !3}
// CHECK:STDOUT: !llvm.errno.tbaa = !{!79}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !12 = !DIFile(filename: "min_prelude/parts/default.carbon", directory: "")
// CHECK:STDOUT: !18 = !DIFile(filename: "pass_references.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 = !{null}
// CHECK:STDOUT: !22 = !DISubroutineType(types: !21)
// CHECK:STDOUT: !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !24 = !{null, !23}
// CHECK:STDOUT: !25 = !DISubroutineType(types: !24)
// CHECK:STDOUT: !26 = !{!23}
// CHECK:STDOUT: !27 = !DISubroutineType(types: !26)
// CHECK:STDOUT: !28 = !{null, !20}
// CHECK:STDOUT: !29 = !DISubroutineType(types: !28)
// CHECK:STDOUT: !30 = distinct !DISubprogram(name: "PassRefs", linkageName: "_CPassRefs.Main", scope: null, file: !18, line: 16, type: !22, spFlags: DISPFlagDefinition, unit: !19)
// CHECK:STDOUT: !31 = !DILocation(line: 17, column: 3, scope: !30)
// CHECK:STDOUT: !35 = !DILocation(line: 18, column: 3, scope: !30)
// CHECK:STDOUT: !36 = !DILocation(line: 8, column: 19, scope: !30)
// CHECK:STDOUT: !37 = !DILocation(line: 19, column: 3, scope: !30)
// CHECK:STDOUT: !39 = !DILocation(line: 20, column: 3, scope: !30)
// CHECK:STDOUT: !40 = !DILocation(line: 22, column: 3, scope: !30)
// CHECK:STDOUT: !44 = !DILocation(line: 23, column: 3, scope: !30)
// CHECK:STDOUT: !45 = !DILocation(line: 12, column: 23, scope: !30)
// CHECK:STDOUT: !46 = !DILocation(line: 24, column: 3, scope: !30)
// CHECK:STDOUT: !47 = !DILocation(line: 25, column: 23, scope: !30)
// CHECK:STDOUT: !48 = !DILocation(line: 25, column: 3, scope: !30)
// CHECK:STDOUT: !49 = !DILocation(line: 16, column: 1, scope: !30)
// CHECK:STDOUT: !50 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk:Default.dc3dd9c349162a91.Core:C.Cpp", scope: null, file: !18, line: 5, type: !27, spFlags: DISPFlagDefinition, unit: !19)
// CHECK:STDOUT: !52 = !DILocation(line: 5, column: 7, scope: !50)
// CHECK:STDOUT: !53 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core", scope: null, file: !18, line: 8, type: !25, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !56)
// CHECK:STDOUT: !54 = !DILocalVariable(arg: 1, scope: !53, type: !23)
// CHECK:STDOUT: !55 = !DILocation(line: 8, column: 19, scope: !53)
// CHECK:STDOUT: !56 = !{!54}
// CHECK:STDOUT: !57 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core", scope: null, file: !18, line: 12, type: !29, spFlags: DISPFlagDefinition, unit: !19, retainedNodes: !60)
// CHECK:STDOUT: !58 = !DILocalVariable(arg: 1, scope: !57, type: !20)
// CHECK:STDOUT: !59 = !DILocation(line: 12, column: 23, scope: !57)
// CHECK:STDOUT: !60 = !{!58}
// CHECK:STDOUT: !61 = distinct !DISubprogram(name: "Op", linkageName: "_COp.51f3fb62cb986374:DefaultOrUnformed.Core.67b28f83c7cfd60c", scope: null, file: !12, line: 9, type: !27, spFlags: DISPFlagDefinition, unit: !19)
// CHECK:STDOUT: !64 = !DILocation(line: 9, column: 28, scope: !61)
// CHECK:STDOUT: !65 = !DILocation(line: 9, column: 21, scope: !61)
// CHECK:STDOUT: !66 = !{!"Simple C++ TBAA"}
// CHECK:STDOUT: !67 = !{!"omnipotent char", !66, i64 0}
// CHECK:STDOUT: !68 = !{!"any pointer", !67, i64 0}
// CHECK:STDOUT: !69 = !{!"p1 _ZTS1C", !68, i64 0}
// CHECK:STDOUT: !70 = !{!69, !69, i64 0}
// CHECK:STDOUT: !72 = !{!"int", !67, i64 0}
// CHECK:STDOUT: !73 = !{!"p1 int", !68, i64 0}
// CHECK:STDOUT: !74 = !{!73, !73, i64 0}
// CHECK:STDOUT: !75 = !{i32 8, !"PIC Level", i32 2}
// CHECK:STDOUT: !76 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !77 = !{i32 7, !"uwtable", i32 2}
// CHECK:STDOUT: !78 = !{!"__libc_errno", !72, i64 0}
// CHECK:STDOUT: !79 = !{!78, !72, i64 0}
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'pass_references_via_thunk.carbon'
// CHECK:STDOUT: source_filename = "pass_references_via_thunk.carbon"
// CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
// CHECK:STDOUT:
// CHECK:STDOUT: %class.ForceThunk = type { i8 }
// CHECK:STDOUT:
// CHECK:STDOUT: @C.val = internal constant {} zeroinitializer
// CHECK:STDOUT: @C.val.loc20_20.3 = internal constant {} zeroinitializer
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CPassRefs.Main() #0 !dbg !82 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %c.var = alloca {}, align 1, !dbg !83
// CHECK:STDOUT: %.loc20_18.2.temp = alloca {}, align 1, !dbg !88
// CHECK:STDOUT: %n.var = alloca i32, align 4, !dbg !92
// CHECK:STDOUT: %_.var = alloca i32, align 4, !dbg !97
// CHECK:STDOUT: %.loc26_23.2.temp = alloca i32, align 4, !dbg !99
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %c.var), !dbg !83
// CHECK:STDOUT: call void @"_COp.51f3fb62cb986374:DefaultOrUnformed.Core.67b28f83c7cfd60c"(ptr %c.var), !dbg !83
// CHECK:STDOUT: call void @_Z8TakeCRefR1C10ForceThunk.carbon_thunk.r(ptr %c.var), !dbg !87
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc20_18.2.temp), !dbg !88
// CHECK:STDOUT: call void @_Z9TakeCRRefRK1C10ForceThunk.carbon_thunk._(ptr @C.val.loc20_20.3), !dbg !89
// CHECK:STDOUT: call void @"_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core"(ptr @C.val), !dbg !88
// CHECK:STDOUT: call void @_Z13TakeConstCRefRK1C10ForceThunk.carbon_thunk._(ptr %c.var), !dbg !91
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !92
// CHECK:STDOUT: store i32 poison, ptr %n.var, align 4, !dbg !92
// CHECK:STDOUT: call void @_Z10TakeIntRefRi10ForceThunk.carbon_thunk.r(ptr %n.var), !dbg !96
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !97
// CHECK:STDOUT: store i32 42, ptr %_.var, align 4, !dbg !97
// CHECK:STDOUT: call void @_Z11TakeIntRRefOi10ForceThunk.carbon_thunk.v(ptr %_.var), !dbg !98
// CHECK:STDOUT: call void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %_.var), !dbg !97
// CHECK:STDOUT: %.loc26_23.1 = load i32, ptr %n.var, align 4, !dbg !99
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc26_23.2.temp), !dbg !99
// CHECK:STDOUT: store i32 %.loc26_23.1, ptr %.loc26_23.2.temp, align 4, !dbg !99
// CHECK:STDOUT: call void @_Z15TakeConstIntRefRKi10ForceThunk.carbon_thunk._(ptr %.loc26_23.2.temp), !dbg !100
// CHECK:STDOUT: call void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %.loc26_23.2.temp), !dbg !99
// CHECK:STDOUT: call void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %n.var), !dbg !92
// CHECK:STDOUT: call void @"_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core"(ptr %c.var), !dbg !83
// CHECK:STDOUT: ret void, !dbg !101
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
// CHECK:STDOUT: define internal void @_ZN1CC1Ev.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 !70
// CHECK:STDOUT: %0 = load ptr, ptr %return.addr, align 8, !tbaa !70
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define weak_odr void @"_COp:thunk:Default.dc3dd9c349162a91.Core:C.Cpp"(ptr sret({}) %return) #2 !dbg !102 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_ZN1CC1Ev.carbon_thunk.(ptr %return), !dbg !104
// CHECK:STDOUT: ret void, !dbg !104
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z8TakeCRefR1C10ForceThunk.carbon_thunk.r(ptr noundef nonnull align 1 dereferenceable(1) %0) #3 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk, align 1
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !70
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !70, !nonnull !118
// CHECK:STDOUT: call void @_Z8TakeCRefR1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1) %1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z9TakeCRRefRK1C10ForceThunk.carbon_thunk._(ptr noundef %0) #3 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk, align 1
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !70
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !70
// CHECK:STDOUT: call void @_Z9TakeCRRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1) %1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core"(ptr %self) #0 !dbg !105 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !107
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z13TakeConstCRefRK1C10ForceThunk.carbon_thunk._(ptr noundef %0) #3 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk, align 1
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !70
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !70
// CHECK:STDOUT: call void @_Z13TakeConstCRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1) %1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z10TakeIntRefRi10ForceThunk.carbon_thunk.r(ptr noundef nonnull align 4 dereferenceable(4) %0) #3 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk, align 1
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !74
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !74, !nonnull !118, !align !120
// CHECK:STDOUT: call void @_Z10TakeIntRefRi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4) %1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z11TakeIntRRefOi10ForceThunk.carbon_thunk.v(ptr noundef %0) #3 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk, align 1
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !74
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !74
// CHECK:STDOUT: call void @_Z11TakeIntRRefOi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4) %1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core"(ptr %self) #0 !dbg !109 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !111
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal void @_Z15TakeConstIntRefRKi10ForceThunk.carbon_thunk._(ptr noundef %0) #3 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.addr = alloca ptr, align 8
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk, align 1
// CHECK:STDOUT: store ptr %0, ptr %.addr, align 8, !tbaa !74
// CHECK:STDOUT: %1 = load ptr, ptr %.addr, align 8, !tbaa !74
// CHECK:STDOUT: call void @_Z15TakeConstIntRefRKi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4) %1)
// CHECK:STDOUT: ret void
// 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)) #4
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @"_COp.51f3fb62cb986374:DefaultOrUnformed.Core.67b28f83c7cfd60c"(ptr sret({}) %return) #0 !dbg !113 {
// CHECK:STDOUT: call void @"_COp:thunk:Default.dc3dd9c349162a91.Core:C.Cpp"(ptr %return), !dbg !116
// CHECK:STDOUT: ret void, !dbg !117
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z8TakeCRefR1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1)) #5
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z9TakeCRRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1)) #5
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z13TakeConstCRefRK1C10ForceThunk(ptr noundef nonnull align 1 dereferenceable(1)) #5
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z10TakeIntRefRi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4)) #5
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z11TakeIntRRefOi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4)) #5
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_Z15TakeConstIntRefRKi10ForceThunk(ptr noundef nonnull align 4 dereferenceable(4)) #5
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @"_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core", { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @"_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core", { 2, 1, 0 }
// 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 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 = { alwaysinline nounwind }
// CHECK:STDOUT: attributes #3 = { 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 #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 = !{!81}
// CHECK:STDOUT: !llvm.module.flags = !{!75, !76, !77, !2, !3}
// CHECK:STDOUT: !llvm.errno.tbaa = !{!79}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !12 = !DIFile(filename: "min_prelude/parts/default.carbon", directory: "")
// CHECK:STDOUT: !20 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !21 = !{null}
// CHECK:STDOUT: !22 = !DISubroutineType(types: !21)
// CHECK:STDOUT: !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !24 = !{null, !23}
// CHECK:STDOUT: !25 = !DISubroutineType(types: !24)
// CHECK:STDOUT: !26 = !{!23}
// CHECK:STDOUT: !27 = !DISubroutineType(types: !26)
// CHECK:STDOUT: !28 = !{null, !20}
// CHECK:STDOUT: !29 = !DISubroutineType(types: !28)
// CHECK:STDOUT: !66 = !{!"Simple C++ TBAA"}
// CHECK:STDOUT: !67 = !{!"omnipotent char", !66, i64 0}
// CHECK:STDOUT: !68 = !{!"any pointer", !67, i64 0}
// CHECK:STDOUT: !69 = !{!"p1 _ZTS1C", !68, i64 0}
// CHECK:STDOUT: !70 = !{!69, !69, i64 0}
// CHECK:STDOUT: !72 = !{!"int", !67, i64 0}
// CHECK:STDOUT: !73 = !{!"p1 int", !68, i64 0}
// CHECK:STDOUT: !74 = !{!73, !73, i64 0}
// CHECK:STDOUT: !75 = !{i32 8, !"PIC Level", i32 2}
// CHECK:STDOUT: !76 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !77 = !{i32 7, !"uwtable", i32 2}
// CHECK:STDOUT: !78 = !{!"__libc_errno", !72, i64 0}
// CHECK:STDOUT: !79 = !{!78, !72, i64 0}
// CHECK:STDOUT: !80 = !DIFile(filename: "pass_references_via_thunk.carbon", directory: "")
// CHECK:STDOUT: !81 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !80, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !82 = distinct !DISubprogram(name: "PassRefs", linkageName: "_CPassRefs.Main", scope: null, file: !80, line: 17, type: !22, spFlags: DISPFlagDefinition, unit: !81)
// CHECK:STDOUT: !83 = !DILocation(line: 18, column: 3, scope: !82)
// CHECK:STDOUT: !87 = !DILocation(line: 19, column: 3, scope: !82)
// CHECK:STDOUT: !88 = !DILocation(line: 20, column: 17, scope: !82)
// CHECK:STDOUT: !89 = !DILocation(line: 20, column: 3, scope: !82)
// CHECK:STDOUT: !91 = !DILocation(line: 21, column: 3, scope: !82)
// CHECK:STDOUT: !92 = !DILocation(line: 23, column: 3, scope: !82)
// CHECK:STDOUT: !96 = !DILocation(line: 24, column: 3, scope: !82)
// CHECK:STDOUT: !97 = !DILocation(line: 13, column: 23, scope: !82)
// CHECK:STDOUT: !98 = !DILocation(line: 25, column: 3, scope: !82)
// CHECK:STDOUT: !99 = !DILocation(line: 26, column: 23, scope: !82)
// CHECK:STDOUT: !100 = !DILocation(line: 26, column: 3, scope: !82)
// CHECK:STDOUT: !101 = !DILocation(line: 17, column: 1, scope: !82)
// CHECK:STDOUT: !102 = distinct !DISubprogram(name: "Op", linkageName: "_COp:thunk:Default.dc3dd9c349162a91.Core:C.Cpp", scope: null, file: !80, line: 5, type: !27, spFlags: DISPFlagDefinition, unit: !81)
// CHECK:STDOUT: !104 = !DILocation(line: 5, column: 7, scope: !102)
// CHECK:STDOUT: !105 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.417eccf5eb8addbd:core.Destroy.Core", scope: null, file: !80, line: 20, type: !25, spFlags: DISPFlagDefinition, unit: !81, retainedNodes: !108)
// CHECK:STDOUT: !106 = !DILocalVariable(arg: 1, scope: !105, type: !23)
// CHECK:STDOUT: !107 = !DILocation(line: 20, column: 17, scope: !105)
// CHECK:STDOUT: !108 = !{!106}
// CHECK:STDOUT: !109 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.72395be3dbbe8946:core.Destroy.Core", scope: null, file: !80, line: 13, type: !29, spFlags: DISPFlagDefinition, unit: !81, retainedNodes: !112)
// CHECK:STDOUT: !110 = !DILocalVariable(arg: 1, scope: !109, type: !20)
// CHECK:STDOUT: !111 = !DILocation(line: 13, column: 23, scope: !109)
// CHECK:STDOUT: !112 = !{!110}
// CHECK:STDOUT: !113 = distinct !DISubprogram(name: "Op", linkageName: "_COp.51f3fb62cb986374:DefaultOrUnformed.Core.67b28f83c7cfd60c", scope: null, file: !12, line: 9, type: !27, spFlags: DISPFlagDefinition, unit: !81)
// CHECK:STDOUT: !116 = !DILocation(line: 9, column: 28, scope: !113)
// CHECK:STDOUT: !117 = !DILocation(line: 9, column: 21, scope: !113)
// CHECK:STDOUT: !118 = !{}
// CHECK:STDOUT: !120 = !{i64 4}
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'return_references.carbon'
// CHECK:STDOUT: source_filename = "return_references.carbon"
// CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CGetRefs.Main() #0 !dbg !123 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %ReturnCRef.call = call ptr @_Z10ReturnCRefv(), !dbg !124
// CHECK:STDOUT: %ReturnCRRef.call = call ptr @_Z11ReturnCRRefv(), !dbg !127
// CHECK:STDOUT: %ReturnConstCRef.call = call ptr @_Z15ReturnConstCRefv(), !dbg !130
// CHECK:STDOUT: %ReturnIntRef.call = call ptr @_Z12ReturnIntRefv(), !dbg !133
// CHECK:STDOUT: %ReturnIntRRef.call = call ptr @_Z13ReturnIntRRefv(), !dbg !136
// CHECK:STDOUT: %ReturnConstIntRef.call = call ptr @_Z17ReturnConstIntRefv(), !dbg !139
// CHECK:STDOUT: ret void, !dbg !142
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z10ReturnCRefv() #1
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z11ReturnCRRefv() #1
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z15ReturnConstCRefv() #1
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z12ReturnIntRefv() #1
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z13ReturnIntRRefv() #1
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z17ReturnConstIntRefv() #1
// CHECK:STDOUT:
// 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 = !{!122}
// CHECK:STDOUT: !llvm.module.flags = !{!75, !76, !77, !2, !3}
// CHECK:STDOUT: !llvm.errno.tbaa = !{!79}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !21 = !{null}
// CHECK:STDOUT: !22 = !DISubroutineType(types: !21)
// CHECK:STDOUT: !66 = !{!"Simple C++ TBAA"}
// CHECK:STDOUT: !67 = !{!"omnipotent char", !66, i64 0}
// CHECK:STDOUT: !72 = !{!"int", !67, i64 0}
// CHECK:STDOUT: !75 = !{i32 8, !"PIC Level", i32 2}
// CHECK:STDOUT: !76 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !77 = !{i32 7, !"uwtable", i32 2}
// CHECK:STDOUT: !78 = !{!"__libc_errno", !72, i64 0}
// CHECK:STDOUT: !79 = !{!78, !72, i64 0}
// CHECK:STDOUT: !121 = !DIFile(filename: "return_references.carbon", directory: "")
// CHECK:STDOUT: !122 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !121, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !123 = distinct !DISubprogram(name: "GetRefs", linkageName: "_CGetRefs.Main", scope: null, file: !121, line: 16, type: !22, spFlags: DISPFlagDefinition, unit: !122)
// CHECK:STDOUT: !124 = !DILocation(line: 17, column: 22, scope: !123)
// CHECK:STDOUT: !127 = !DILocation(line: 18, column: 22, scope: !123)
// CHECK:STDOUT: !130 = !DILocation(line: 19, column: 28, scope: !123)
// CHECK:STDOUT: !133 = !DILocation(line: 21, column: 20, scope: !123)
// CHECK:STDOUT: !136 = !DILocation(line: 22, column: 20, scope: !123)
// CHECK:STDOUT: !139 = !DILocation(line: 23, column: 26, scope: !123)
// CHECK:STDOUT: !142 = !DILocation(line: 16, column: 1, scope: !123)
// CHECK:STDOUT:
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'return_references_via_thunk.carbon'
// CHECK:STDOUT: source_filename = "return_references_via_thunk.carbon"
// CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
// CHECK:STDOUT:
// CHECK:STDOUT: %class.ForceThunk.23 = type { i8 }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CGetRefs.Main() #0 !dbg !145 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %ReturnCRef__carbon_thunk.call = call ptr @_Z10ReturnCRef10ForceThunk.carbon_thunk.(), !dbg !146
// CHECK:STDOUT: %ReturnCRRef__carbon_thunk.call = call ptr @_Z11ReturnCRRef10ForceThunk.carbon_thunk.(), !dbg !149
// CHECK:STDOUT: %ReturnConstCRef__carbon_thunk.call = call ptr @_Z15ReturnConstCRef10ForceThunk.carbon_thunk.(), !dbg !152
// CHECK:STDOUT: %ReturnIntRef__carbon_thunk.call = call ptr @_Z12ReturnIntRef10ForceThunk.carbon_thunk.(), !dbg !155
// CHECK:STDOUT: %ReturnIntRRef__carbon_thunk.call = call ptr @_Z13ReturnIntRRef10ForceThunk.carbon_thunk.(), !dbg !158
// CHECK:STDOUT: %ReturnConstIntRef__carbon_thunk.call = call ptr @_Z17ReturnConstIntRef10ForceThunk.carbon_thunk.(), !dbg !161
// CHECK:STDOUT: ret void, !dbg !164
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal noundef nonnull align 1 dereferenceable(1) ptr @_Z10ReturnCRef10ForceThunk.carbon_thunk.() #1 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk.23, align 1
// CHECK:STDOUT: %call = call noundef nonnull align 1 dereferenceable(1) ptr @_Z10ReturnCRef10ForceThunk()
// CHECK:STDOUT: ret ptr %call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal noundef nonnull align 1 dereferenceable(1) ptr @_Z11ReturnCRRef10ForceThunk.carbon_thunk.() #1 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk.23, align 1
// CHECK:STDOUT: %call = call noundef nonnull align 1 dereferenceable(1) ptr @_Z11ReturnCRRef10ForceThunk()
// CHECK:STDOUT: ret ptr %call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal noundef nonnull align 1 dereferenceable(1) ptr @_Z15ReturnConstCRef10ForceThunk.carbon_thunk.() #1 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk.23, align 1
// CHECK:STDOUT: %call = call noundef nonnull align 1 dereferenceable(1) ptr @_Z15ReturnConstCRef10ForceThunk()
// CHECK:STDOUT: ret ptr %call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal noundef nonnull align 4 dereferenceable(4) ptr @_Z12ReturnIntRef10ForceThunk.carbon_thunk.() #1 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk.23, align 1
// CHECK:STDOUT: %call = call noundef nonnull align 4 dereferenceable(4) ptr @_Z12ReturnIntRef10ForceThunk()
// CHECK:STDOUT: ret ptr %call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal noundef nonnull align 4 dereferenceable(4) ptr @_Z13ReturnIntRRef10ForceThunk.carbon_thunk.() #1 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk.23, align 1
// CHECK:STDOUT: %call = call noundef nonnull align 4 dereferenceable(4) ptr @_Z13ReturnIntRRef10ForceThunk()
// CHECK:STDOUT: ret ptr %call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress uwtable
// CHECK:STDOUT: define internal noundef nonnull align 4 dereferenceable(4) ptr @_Z17ReturnConstIntRef10ForceThunk.carbon_thunk.() #1 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %agg.tmp = alloca %class.ForceThunk.23, align 1
// CHECK:STDOUT: %call = call noundef nonnull align 4 dereferenceable(4) ptr @_Z17ReturnConstIntRef10ForceThunk()
// CHECK:STDOUT: ret ptr %call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z10ReturnCRef10ForceThunk() #2
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z11ReturnCRRef10ForceThunk() #2
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 1 dereferenceable(1) ptr @_Z15ReturnConstCRef10ForceThunk() #2
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z12ReturnIntRef10ForceThunk() #2
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z13ReturnIntRRef10ForceThunk() #2
// CHECK:STDOUT:
// CHECK:STDOUT: declare noundef nonnull align 4 dereferenceable(4) ptr @_Z17ReturnConstIntRef10ForceThunk() #2
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// 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 = !{!144}
// CHECK:STDOUT: !llvm.module.flags = !{!75, !76, !77, !2, !3}
// CHECK:STDOUT: !llvm.errno.tbaa = !{!79}
// CHECK:STDOUT:
// CHECK:STDOUT: !2 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !3 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !21 = !{null}
// CHECK:STDOUT: !22 = !DISubroutineType(types: !21)
// CHECK:STDOUT: !66 = !{!"Simple C++ TBAA"}
// CHECK:STDOUT: !67 = !{!"omnipotent char", !66, i64 0}
// CHECK:STDOUT: !72 = !{!"int", !67, i64 0}
// CHECK:STDOUT: !75 = !{i32 8, !"PIC Level", i32 2}
// CHECK:STDOUT: !76 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !77 = !{i32 7, !"uwtable", i32 2}
// CHECK:STDOUT: !78 = !{!"__libc_errno", !72, i64 0}
// CHECK:STDOUT: !79 = !{!78, !72, i64 0}
// CHECK:STDOUT: !143 = !DIFile(filename: "return_references_via_thunk.carbon", directory: "")
// CHECK:STDOUT: !144 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !143, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !145 = distinct !DISubprogram(name: "GetRefs", linkageName: "_CGetRefs.Main", scope: null, file: !143, line: 17, type: !22, spFlags: DISPFlagDefinition, unit: !144)
// CHECK:STDOUT: !146 = !DILocation(line: 18, column: 22, scope: !145)
// CHECK:STDOUT: !149 = !DILocation(line: 19, column: 22, scope: !145)
// CHECK:STDOUT: !152 = !DILocation(line: 20, column: 28, scope: !145)
// CHECK:STDOUT: !155 = !DILocation(line: 22, column: 20, scope: !145)
// CHECK:STDOUT: !158 = !DILocation(line: 23, column: 20, scope: !145)
// CHECK:STDOUT: !161 = !DILocation(line: 24, column: 26, scope: !145)
// CHECK:STDOUT: !164 = !DILocation(line: 17, column: 1, scope: !145)
// CHECK:STDOUT:
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