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carbon-lang/toolchain/lower/testdata/interop/cpp/class/virtual_fn.carbon
T
David Blaikie 4abb6100e7 Define exported C++ thunks in the LLVM function Clang uses for them (#8060) 
Carbon gives the C++ declaration of an exported Carbon thunk an asm
label that
includes the target's global symbol prefix (`_` on Mach-O). Clang names
a
declaration with an asm label `\01<label>` in the IR, so that LLVM uses
the
label verbatim as the symbol name, while Carbon lowered the thunk
definition
under its unprefixed name. Both name the same symbol, but they were
distinct
globals in the IR, so LLVM couldn't see that the C++ calls refer to the
Carbon
definition. That only works while the definition is never discarded.

Mark the Carbon thunk as a `CppThunk` (as described in
`toolchain/docs/check/cpp/thunks.md`), record its C++ declaration in
`clang_decls`, and when lowering the thunk, ask Clang for its function
(creating it if necessary) and define the thunk in that function. This
means
that the thunk and the C++ calls to it always use the same IR global,
with
Clang's name and signature.

The thunk takes all of its parameters by reference, so Clang lowers its
parameters the same way Carbon does, but some C++ ABIs (such as Apple
arm64)
return `this` from constructors. In that case, return the parameter that
Clang
marks `returned`.

On targets without a global prefix, the IR names already matched, so the
only
change is that the thunk definitions now carry Clang's parameter and
function
attributes.
2026-10-30 01:22:12 +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
// EXTRA-ARGS: --clang-arg=-fno-exceptions
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/interop/cpp/class/virtual_fn.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/interop/cpp/class/virtual_fn.carbon
// --- override_virtual_dtor.carbon
library "[[@TEST_NAME]]";
import Cpp;
inline Cpp '''
struct A {
virtual ~A() = 0;
virtual void F() const;
};
''';
class Final {
extend base: Cpp.A;
override fn F(self);
}
base class Base {
extend base: Cpp.A;
override fn F(self);
}
inline Cpp '''
void delete_new_Final() {
// vtable should refer to Carbon::Final's dtor.
auto* p = new Carbon::Final;
// Perform a devirtualized call to Final destructor.
delete p;
}
void delete_new_Base() {
// vtable should refer to Carbon::Base's dtor.
auto* p = new Carbon::Base;
// Perform a virtual call to destructor.
delete p;
}
''';
// CHECK:STDOUT: ; ---
// CHECK:STDOUT: ; ModuleID = 'override_virtual_dtor.carbon'
// CHECK:STDOUT: source_filename = "override_virtual_dtor.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: $_ZN6Carbon4Main5FinalC2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon4Main5FinalD2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon4Main4BaseC2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon4Main5FinalD0Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon4Main4BaseD2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon4Main4BaseD0Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN1AC2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTVN6Carbon4Main5FinalE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTVN6Carbon4Main4BaseE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTIN6Carbon4Main5FinalE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTSN6Carbon4Main5FinalE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTIN6Carbon4Main4BaseE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTSN6Carbon4Main4BaseE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: @_ZTV1A = available_externally constant { [5 x ptr] } { [5 x ptr] [ptr null, ptr @_ZTI1A, ptr @__cxa_pure_virtual, ptr @__cxa_pure_virtual, ptr @_ZNK1A1FEv] }, align 8
// CHECK:STDOUT: @_ZTVN6Carbon4Main5FinalE = linkonce_odr dso_local constant { [5 x ptr] } { [5 x ptr] [ptr null, ptr @_ZTIN6Carbon4Main5FinalE, ptr @_ZN6Carbon4Main5FinalD2Ev, ptr @_ZN6Carbon4Main5FinalD0Ev, ptr @_ZNK6Carbon4Main5Final1FEv] }, comdat, align 8
// CHECK:STDOUT: @_ZTVN6Carbon4Main4BaseE = linkonce_odr dso_local constant { [5 x ptr] } { [5 x ptr] [ptr null, ptr @_ZTIN6Carbon4Main4BaseE, ptr @_ZN6Carbon4Main4BaseD2Ev, ptr @_ZN6Carbon4Main4BaseD0Ev, ptr @_ZNK6Carbon4Main4Base1FEv] }, comdat, align 8
// CHECK:STDOUT: @_ZTI1A = external constant ptr
// CHECK:STDOUT: @_ZTIN6Carbon4Main5FinalE = linkonce_odr dso_local constant { ptr, ptr, ptr } { ptr getelementptr inbounds (i8, ptr @_ZTVN10__cxxabiv120__si_class_type_infoE, i64 16), ptr @_ZTSN6Carbon4Main5FinalE, ptr @_ZTI1A }, comdat, align 8
// CHECK:STDOUT: @_ZTVN10__cxxabiv120__si_class_type_infoE = external global [0 x ptr]
// CHECK:STDOUT: @_ZTSN6Carbon4Main5FinalE = linkonce_odr dso_local constant [21 x i8] c"N6Carbon4Main5FinalE\00", comdat, align 1
// CHECK:STDOUT: @_ZTIN6Carbon4Main4BaseE = linkonce_odr dso_local constant { ptr, ptr, ptr } { ptr getelementptr inbounds (i8, ptr @_ZTVN10__cxxabiv120__si_class_type_infoE, i64 16), ptr @_ZTSN6Carbon4Main4BaseE, ptr @_ZTI1A }, comdat, align 8
// CHECK:STDOUT: @_ZTSN6Carbon4Main4BaseE = linkonce_odr dso_local constant [20 x i8] c"N6Carbon4Main4BaseE\00", comdat, align 1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
// CHECK:STDOUT: define dso_local void @_Z16delete_new_Finalv() #0 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %p = alloca ptr, align 8
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %p) #8
// CHECK:STDOUT: %call = call noalias noundef nonnull ptr @_Znwm(i64 noundef 8) #11
// CHECK:STDOUT: call void @_ZN6Carbon4Main5FinalC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %call) #8
// CHECK:STDOUT: store ptr %call, ptr %p, align 8, !tbaa !4
// CHECK:STDOUT: %0 = load ptr, ptr %p, align 8, !tbaa !4
// CHECK:STDOUT: %isnull = icmp eq ptr %0, null
// CHECK:STDOUT: br i1 %isnull, label %delete.end, label %delete.notnull
// CHECK:STDOUT:
// CHECK:STDOUT: delete.notnull: ; preds = %entry
// CHECK:STDOUT: call void @_ZN6Carbon4Main5FinalD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %0) #8
// CHECK:STDOUT: call void @_ZdlPvm(ptr noundef %0, i64 noundef 8) #12
// CHECK:STDOUT: br label %delete.end
// CHECK:STDOUT:
// CHECK:STDOUT: delete.end: ; preds = %delete.notnull, %entry
// CHECK:STDOUT: call void @llvm.lifetime.end.p0(ptr %p) #8
// 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)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nobuiltin allocsize(0)
// CHECK:STDOUT: declare noundef nonnull ptr @_Znwm(i64 noundef) #2
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon4Main5FinalC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %this) unnamed_addr #3 comdat align 2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !4
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: call void @_ZN1AC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %this1) #8
// CHECK:STDOUT: store ptr getelementptr inbounds inrange(-16, 24) (i8, ptr @_ZTVN6Carbon4Main5FinalE, i64 16), ptr %this1, align 8, !tbaa !8
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon4Main5FinalD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %this) unnamed_addr #3 comdat align 2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !4
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: call void @"_C__destroy_thunk:thunk.Final.Main"(ptr noundef nonnull align 8 dereferenceable(8) %this1)
// CHECK:STDOUT: call void @_ZN1AD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %this1) #8
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nobuiltin nounwind
// CHECK:STDOUT: declare void @_ZdlPvm(ptr noundef, i64 noundef) #4
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.end.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: mustprogress nounwind uwtable
// CHECK:STDOUT: define dso_local void @_Z15delete_new_Basev() #0 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %p = alloca ptr, align 8
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %p) #8
// CHECK:STDOUT: %call = call noalias noundef nonnull ptr @_Znwm(i64 noundef 8) #11
// CHECK:STDOUT: call void @_ZN6Carbon4Main4BaseC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %call) #8
// CHECK:STDOUT: store ptr %call, ptr %p, align 8, !tbaa !6
// CHECK:STDOUT: %0 = load ptr, ptr %p, align 8, !tbaa !6
// CHECK:STDOUT: %isnull = icmp eq ptr %0, null
// CHECK:STDOUT: br i1 %isnull, label %delete.end, label %delete.notnull
// CHECK:STDOUT:
// CHECK:STDOUT: delete.notnull: ; preds = %entry
// CHECK:STDOUT: %vtable = load ptr, ptr %0, align 8, !tbaa !8
// CHECK:STDOUT: %vfn = getelementptr inbounds ptr, ptr %vtable, i64 1
// CHECK:STDOUT: %1 = load ptr, ptr %vfn, align 8
// CHECK:STDOUT: call void %1(ptr noundef nonnull align 8 dereferenceable(8) %0) #8
// CHECK:STDOUT: br label %delete.end
// CHECK:STDOUT:
// CHECK:STDOUT: delete.end: ; preds = %delete.notnull, %entry
// CHECK:STDOUT: call void @llvm.lifetime.end.p0(ptr %p) #8
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon4Main4BaseC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %this) unnamed_addr #3 comdat align 2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !6
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: call void @_ZN1AC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %this1) #8
// CHECK:STDOUT: store ptr getelementptr inbounds inrange(-16, 24) (i8, ptr @_ZTVN6Carbon4Main4BaseE, i64 16), ptr %this1, align 8, !tbaa !8
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
// CHECK:STDOUT: define internal void @_ZNK1A1FEv.carbon_thunk._(ptr noundef nonnull align 8 dereferenceable(8) %this) #5 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !92
// CHECK:STDOUT: %0 = load ptr, ptr %this.addr, align 8, !tbaa !92, !nonnull !95, !align !96
// CHECK:STDOUT: %vtable = load ptr, ptr %0, align 8, !tbaa !8
// CHECK:STDOUT: %vfn = getelementptr inbounds ptr, ptr %vtable, i64 2
// CHECK:STDOUT: %1 = load ptr, ptr %vfn, align 8
// CHECK:STDOUT: call void %1(ptr noundef nonnull align 8 dereferenceable(8) %0)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CF.Final.Main(ptr)
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define weak_odr void @"_CF:thunk:A.Cpp:Final.Main"(ptr %self) #6 !dbg !32 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CF.Final.Main(ptr %self), !dbg !35
// CHECK:STDOUT: ret void, !dbg !35
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define weak_odr void @"_C__destroy_thunk:thunk.Final.Main"(ptr %self) #6 !dbg !37 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CSelfDestruct.Core.937c854cf39ce4c2(ptr %self), !dbg !39
// CHECK:STDOUT: ret void, !dbg !39
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: declare void @_ZN1AD1Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8)) unnamed_addr #7
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.e9cc9e95545cc62f:core.SubobjectDestroy.Core"(ptr %self) #8 !dbg !41 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc12_13.1.base = getelementptr inbounds nuw { [8 x i8] }, ptr %self, i32 0, i32 0, !dbg !43
// CHECK:STDOUT: call void @_CSelfDestruct.Core.e885b4b34ded440e(ptr %.loc12_13.1.base), !dbg !43
// CHECK:STDOUT: ret void, !dbg !43
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.28387b086eba9957:core.SubobjectDestroy.Core"(ptr %self) #8 !dbg !45 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc12_13.1.base = getelementptr inbounds nuw { [8 x i8] }, ptr %self, i32 0, i32 0, !dbg !47
// CHECK:STDOUT: call void @_CSelfDestruct.Core.e885b4b34ded440e(ptr %.loc12_13.1.base), !dbg !47
// CHECK:STDOUT: ret void, !dbg !47
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF__carbon_thunk.Final.Main(ptr noundef nonnull align 8 dereferenceable(8) %self) #7 !dbg !49 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CF.Final.Main(ptr %self), !dbg !51
// CHECK:STDOUT: ret void, !dbg !51
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CF.Base.Main(ptr)
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define weak_odr void @"_CF:thunk:A.Cpp:Base.Main"(ptr %self) #6 !dbg !53 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CF.Base.Main(ptr %self), !dbg !56
// CHECK:STDOUT: ret void, !dbg !56
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline nounwind
// CHECK:STDOUT: define weak_odr void @"_C__destroy_thunk:thunk.Base.Main"(ptr %self) #6 !dbg !58 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CSelfDestruct.Core.a4aefa05e08cd2e1(ptr %self), !dbg !60
// CHECK:STDOUT: ret void, !dbg !60
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.294df737cd074d60:core.SubobjectDestroy.Core"(ptr %self) #8 !dbg !62 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %.loc17_17.1.base = getelementptr inbounds nuw { [8 x i8] }, ptr %self, i32 0, i32 0, !dbg !64
// CHECK:STDOUT: call void @_CSelfDestruct.Core.e885b4b34ded440e(ptr %.loc17_17.1.base), !dbg !64
// CHECK:STDOUT: ret void, !dbg !64
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF__carbon_thunk.Base.Main(ptr noundef nonnull align 8 dereferenceable(8) %self) #7 !dbg !66 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @_CF.Base.Main(ptr %self), !dbg !68
// CHECK:STDOUT: ret void, !dbg !68
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CSelfDestruct.Core.937c854cf39ce4c2(ptr %t) #8 !dbg !70 {
// CHECK:STDOUT: call void @"_COp.28387b086eba9957:core.SubobjectDestroy.Core"(ptr %t), !dbg !74
// CHECK:STDOUT: ret void, !dbg !75
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CSelfDestruct.Core.e885b4b34ded440e(ptr %t) #8 !dbg !77 {
// CHECK:STDOUT: %vtable = load ptr, ptr %t, align 8, !dbg !81
// CHECK:STDOUT: %1 = call ptr @llvm.load.relative.i32(ptr %vtable, i32 0), !dbg !81
// CHECK:STDOUT: call void %1(ptr %t), !dbg !81
// CHECK:STDOUT: ret void, !dbg !82
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CSelfDestruct.Core.a4aefa05e08cd2e1(ptr %t) #8 !dbg !84 {
// CHECK:STDOUT: call void @"_COp.294df737cd074d60:core.SubobjectDestroy.Core"(ptr %t), !dbg !88
// CHECK:STDOUT: ret void, !dbg !89
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: read)
// CHECK:STDOUT: declare ptr @llvm.load.relative.i32(ptr, i32) #9
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @__cxa_pure_virtual() unnamed_addr
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_ZNK1A1FEv(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #10
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon4Main5FinalD0Ev(ptr noundef nonnull align 8 dereferenceable(8) %this) unnamed_addr #3 comdat align 2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !4
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: call void @_ZN6Carbon4Main5FinalD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %this1) #8
// CHECK:STDOUT: call void @_ZdlPvm(ptr noundef %this1, i64 noundef 8) #12
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
// CHECK:STDOUT: define internal void @_ZNK6Carbon4Main5Final1FEv(ptr noundef nonnull align 8 dereferenceable(8) %this) unnamed_addr #5 align 2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !4
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: call void @_CF__carbon_thunk.Final.Main(ptr noundef nonnull align 8 dereferenceable(8) %this1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon4Main4BaseD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %this) unnamed_addr #3 comdat align 2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !6
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: store ptr getelementptr inbounds inrange(-16, 24) (i8, ptr @_ZTVN6Carbon4Main4BaseE, i64 16), ptr %this1, align 8, !tbaa !8
// CHECK:STDOUT: call void @"_C__destroy_thunk:thunk.Base.Main"(ptr noundef nonnull align 8 dereferenceable(8) %this1)
// CHECK:STDOUT: call void @_ZN1AD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %this1) #8
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon4Main4BaseD0Ev(ptr noundef nonnull align 8 dereferenceable(8) %this) unnamed_addr #3 comdat align 2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !6
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: call void @_ZN6Carbon4Main4BaseD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %this1) #8
// CHECK:STDOUT: call void @_ZdlPvm(ptr noundef %this1, i64 noundef 8) #12
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
// CHECK:STDOUT: define internal void @_ZNK6Carbon4Main4Base1FEv(ptr noundef nonnull align 8 dereferenceable(8) %this) unnamed_addr #5 align 2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !6
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: call void @_CF__carbon_thunk.Base.Main(ptr noundef nonnull align 8 dereferenceable(8) %this1)
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN1AC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %this) unnamed_addr #3 comdat align 2 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %this.addr = alloca ptr, align 8
// CHECK:STDOUT: store ptr %this, ptr %this.addr, align 8, !tbaa !92
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: store ptr getelementptr inbounds inrange(-16, 24) (i8, ptr @_ZTV1A, i64 16), ptr %this1, align 8, !tbaa !8
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: declare void @_ZN1AD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8)) unnamed_addr #7
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @_ZN6Carbon4Main5FinalD2Ev, { 2, 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_CSelfDestruct.Core.e885b4b34ded440e, { 2, 1, 0 }
// CHECK:STDOUT: uselistorder ptr @__cxa_pure_virtual, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_ZN6Carbon4Main4BaseD2Ev, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_ZN1AC2Ev, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_ZN1AD2Ev, { 1, 0 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #2 = { nobuiltin allocsize(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 #3 = { inlinehint mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
// CHECK:STDOUT: attributes #4 = { nobuiltin nounwind "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 = { 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 #6 = { alwaysinline nounwind }
// CHECK:STDOUT: attributes #7 = { nounwind "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 #8 = { nounwind }
// CHECK:STDOUT: attributes #9 = { nocallback nofree nosync nounwind willreturn memory(argmem: read) }
// CHECK:STDOUT: attributes #10 = { "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 #11 = { builtin allocsize(0) memory(inaccessiblemem: readwrite, errnomem: write) }
// CHECK:STDOUT: attributes #12 = { builtin nounwind }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!28}
// CHECK:STDOUT: !llvm.module.flags = !{!98, !99, !100, !11, !12}
// CHECK:STDOUT: !llvm.errno.tbaa = !{!103}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{!"Simple C++ TBAA"}
// CHECK:STDOUT: !1 = !{!"omnipotent char", !0, i64 0}
// CHECK:STDOUT: !2 = !{!"any pointer", !1, i64 0}
// CHECK:STDOUT: !3 = !{!"p1 _ZTSN6Carbon4Main5FinalE", !2, i64 0}
// CHECK:STDOUT: !4 = !{!3, !3, i64 0}
// CHECK:STDOUT: !5 = !{!"p1 _ZTSN6Carbon4Main4BaseE", !2, i64 0}
// CHECK:STDOUT: !6 = !{!5, !5, i64 0}
// CHECK:STDOUT: !7 = !{!"vtable pointer", !0, i64 0}
// CHECK:STDOUT: !8 = !{!7, !7, i64 0}
// CHECK:STDOUT: !11 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !12 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !19 = !DIFile(filename: "min_prelude/parts/destroy.carbon", directory: "")
// CHECK:STDOUT: !27 = !DIFile(filename: "override_virtual_dtor.carbon", directory: "")
// CHECK:STDOUT: !28 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !27, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !29 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !30 = !{null, !29}
// CHECK:STDOUT: !31 = !DISubroutineType(types: !30)
// CHECK:STDOUT: !32 = distinct !DISubprogram(name: "F", linkageName: "_CF:thunk:A.Cpp:Final.Main", scope: null, file: !27, line: 14, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !36)
// CHECK:STDOUT: !33 = !DILocalVariable(arg: 1, scope: !32, type: !29)
// CHECK:STDOUT: !35 = !DILocation(line: 14, column: 3, scope: !32)
// CHECK:STDOUT: !36 = !{!33}
// CHECK:STDOUT: !37 = distinct !DISubprogram(name: "__destroy_thunk", linkageName: "_C__destroy_thunk:thunk.Final.Main", scope: null, file: !27, line: 12, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !40)
// CHECK:STDOUT: !38 = !DILocalVariable(arg: 1, scope: !37, type: !29)
// CHECK:STDOUT: !39 = !DILocation(line: 12, column: 1, scope: !37)
// CHECK:STDOUT: !40 = !{!38}
// CHECK:STDOUT: !41 = distinct !DISubprogram(name: "Op", linkageName: "_COp.e9cc9e95545cc62f:core.SubobjectDestroy.Core", scope: null, file: !27, line: 12, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !44)
// CHECK:STDOUT: !42 = !DILocalVariable(arg: 1, scope: !41, type: !29)
// CHECK:STDOUT: !43 = !DILocation(line: 12, column: 1, scope: !41)
// CHECK:STDOUT: !44 = !{!42}
// CHECK:STDOUT: !45 = distinct !DISubprogram(name: "Op", linkageName: "_COp.28387b086eba9957:core.SubobjectDestroy.Core", scope: null, file: !27, line: 12, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !48)
// CHECK:STDOUT: !46 = !DILocalVariable(arg: 1, scope: !45, type: !29)
// CHECK:STDOUT: !47 = !DILocation(line: 12, column: 1, scope: !45)
// CHECK:STDOUT: !48 = !{!46}
// CHECK:STDOUT: !49 = distinct !DISubprogram(name: "F__carbon_thunk", linkageName: "_CF__carbon_thunk.Final.Main", scope: null, file: !27, line: 14, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !52)
// CHECK:STDOUT: !50 = !DILocalVariable(arg: 1, scope: !49, type: !29)
// CHECK:STDOUT: !51 = !DILocation(line: 14, column: 3, scope: !49)
// CHECK:STDOUT: !52 = !{!50}
// CHECK:STDOUT: !53 = distinct !DISubprogram(name: "F", linkageName: "_CF:thunk:A.Cpp:Base.Main", scope: null, file: !27, line: 19, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !57)
// CHECK:STDOUT: !54 = !DILocalVariable(arg: 1, scope: !53, type: !29)
// CHECK:STDOUT: !56 = !DILocation(line: 19, column: 3, scope: !53)
// CHECK:STDOUT: !57 = !{!54}
// CHECK:STDOUT: !58 = distinct !DISubprogram(name: "__destroy_thunk", linkageName: "_C__destroy_thunk:thunk.Base.Main", scope: null, file: !27, line: 17, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !61)
// CHECK:STDOUT: !59 = !DILocalVariable(arg: 1, scope: !58, type: !29)
// CHECK:STDOUT: !60 = !DILocation(line: 17, column: 1, scope: !58)
// CHECK:STDOUT: !61 = !{!59}
// CHECK:STDOUT: !62 = distinct !DISubprogram(name: "Op", linkageName: "_COp.294df737cd074d60:core.SubobjectDestroy.Core", scope: null, file: !27, line: 17, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !65)
// CHECK:STDOUT: !63 = !DILocalVariable(arg: 1, scope: !62, type: !29)
// CHECK:STDOUT: !64 = !DILocation(line: 17, column: 1, scope: !62)
// CHECK:STDOUT: !65 = !{!63}
// CHECK:STDOUT: !66 = distinct !DISubprogram(name: "F__carbon_thunk", linkageName: "_CF__carbon_thunk.Base.Main", scope: null, file: !27, line: 19, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !69)
// CHECK:STDOUT: !67 = !DILocalVariable(arg: 1, scope: !66, type: !29)
// CHECK:STDOUT: !68 = !DILocation(line: 19, column: 3, scope: !66)
// CHECK:STDOUT: !69 = !{!67}
// CHECK:STDOUT: !70 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.Core.937c854cf39ce4c2", scope: null, file: !19, line: 32, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !76)
// CHECK:STDOUT: !71 = !DILocalVariable(arg: 1, scope: !70, type: !29)
// CHECK:STDOUT: !74 = !DILocation(line: 34, column: 5, scope: !70)
// CHECK:STDOUT: !75 = !DILocation(line: 32, column: 1, scope: !70)
// CHECK:STDOUT: !76 = !{!71}
// CHECK:STDOUT: !77 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.Core.e885b4b34ded440e", scope: null, file: !19, line: 32, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !83)
// CHECK:STDOUT: !78 = !DILocalVariable(arg: 1, scope: !77, type: !29)
// CHECK:STDOUT: !81 = !DILocation(line: 34, column: 5, scope: !77)
// CHECK:STDOUT: !82 = !DILocation(line: 32, column: 1, scope: !77)
// CHECK:STDOUT: !83 = !{!78}
// CHECK:STDOUT: !84 = distinct !DISubprogram(name: "SelfDestruct", linkageName: "_CSelfDestruct.Core.a4aefa05e08cd2e1", scope: null, file: !19, line: 32, type: !31, spFlags: DISPFlagDefinition, unit: !28, retainedNodes: !90)
// CHECK:STDOUT: !85 = !DILocalVariable(arg: 1, scope: !84, type: !29)
// CHECK:STDOUT: !88 = !DILocation(line: 34, column: 5, scope: !84)
// CHECK:STDOUT: !89 = !DILocation(line: 32, column: 1, scope: !84)
// CHECK:STDOUT: !90 = !{!85}
// CHECK:STDOUT: !91 = !{!"p1 _ZTS1A", !2, i64 0}
// CHECK:STDOUT: !92 = !{!91, !91, i64 0}
// CHECK:STDOUT: !95 = !{}
// CHECK:STDOUT: !96 = !{i64 8}
// CHECK:STDOUT: !98 = !{i32 8, !"PIC Level", i32 2}
// CHECK:STDOUT: !99 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !100 = !{i32 7, !"uwtable", i32 2}
// CHECK:STDOUT: !101 = !{!"int", !1, i64 0}
// CHECK:STDOUT: !102 = !{!"__libc_errno", !101, i64 0}
// CHECK:STDOUT: !103 = !{!102, !101, i64 0}
// CHECK:STDOUT:
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