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carbon-lang/toolchain/lower/testdata/interop/cpp/class/virtual_fn.carbon
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ATHARVAandDana Jansens 804359dce0 Fix crash when lowering Carbon derived class with C++ virtual base class (#7745) 
If a Carbon class overrides virtual functions from a C++ base class but
is never referenced from C++, it is never exported to Clang. During
lowering, `BuildVtable` then fails to find a `CXXRecordDecl` and crashes
when attempting to get the vtable from Clang's code generator.

Ensure dynamic classes with foreign vtables are exported to Clang when
completing the class definition in `CheckCompleteClassType`, and look up
`first_decl_id()` in `BuildVtable`.

Fixes #7721

---------

Co-authored-by: Dana Jansens <danakj@orodu.net>
2026-09-18 18:08:53 +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: $_ZN6Carbon5FinalC2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon5FinalD2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon4BaseC2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon5FinalD0Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon4BaseD2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN6Carbon4BaseD0Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN1AC2Ev = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTVN6Carbon5FinalE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTVN6Carbon4BaseE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTIN6Carbon5FinalE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTSN6Carbon5FinalE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTIN6Carbon4BaseE = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZTSN6Carbon4BaseE = 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: @_ZTVN6Carbon5FinalE = linkonce_odr dso_local constant { [5 x ptr] } { [5 x ptr] [ptr null, ptr @_ZTIN6Carbon5FinalE, ptr @_ZN6Carbon5FinalD2Ev, ptr @_ZN6Carbon5FinalD0Ev, ptr @_ZNK6Carbon5Final1FEv] }, comdat, align 8
// CHECK:STDOUT: @_ZTVN6Carbon4BaseE = linkonce_odr dso_local constant { [5 x ptr] } { [5 x ptr] [ptr null, ptr @_ZTIN6Carbon4BaseE, ptr @_ZN6Carbon4BaseD2Ev, ptr @_ZN6Carbon4BaseD0Ev, ptr @_ZNK6Carbon4Base1FEv] }, comdat, align 8
// CHECK:STDOUT: @_ZTI1A = external constant ptr
// CHECK:STDOUT: @_ZTIN6Carbon5FinalE = linkonce_odr dso_local constant { ptr, ptr, ptr } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv120__si_class_type_infoE, i64 2), ptr @_ZTSN6Carbon5FinalE, ptr @_ZTI1A }, comdat, align 8
// CHECK:STDOUT: @_ZTVN10__cxxabiv120__si_class_type_infoE = external global [0 x ptr]
// CHECK:STDOUT: @_ZTSN6Carbon5FinalE = linkonce_odr dso_local constant [16 x i8] c"N6Carbon5FinalE\00", comdat, align 1
// CHECK:STDOUT: @_ZTIN6Carbon4BaseE = linkonce_odr dso_local constant { ptr, ptr, ptr } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv120__si_class_type_infoE, i64 2), ptr @_ZTSN6Carbon4BaseE, ptr @_ZTI1A }, comdat, align 8
// CHECK:STDOUT: @_ZTSN6Carbon4BaseE = linkonce_odr dso_local constant [15 x i8] c"N6Carbon4BaseE\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) #10
// CHECK:STDOUT: call void @_ZN6Carbon5FinalC2Ev(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 @_ZN6Carbon5FinalD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %0) #8
// CHECK:STDOUT: call void @_ZdlPvm(ptr noundef %0, i64 noundef 8) #11
// 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 @_ZN6Carbon5FinalC2Ev(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) ({ [5 x ptr] }, ptr @_ZTVN6Carbon5FinalE, i32 0, i32 0, i32 2), 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 @_ZN6Carbon5FinalD2Ev(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) #10
// CHECK:STDOUT: call void @_ZN6Carbon4BaseC2Ev(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 @_ZN6Carbon4BaseC2Ev(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) ({ [5 x ptr] }, ptr @_ZTVN6Carbon4BaseE, i32 0, i32 0, i32 2), 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 !71
// CHECK:STDOUT: %0 = load ptr, ptr %this.addr, align 8, !tbaa !71, !nonnull !74, !align !75
// 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 @"_COp.28387b086eba9957:core.Destroy.Core"(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.Destroy.Core"(ptr %self) #8 !dbg !41 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !43
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.28387b086eba9957:core.Destroy.Core"(ptr %self) #8 !dbg !45 {
// CHECK:STDOUT: entry:
// 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 %self) #8 !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 @"_COp.294df737cd074d60:core.Destroy.Core"(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.Destroy.Core"(ptr %self) #8 !dbg !62 {
// CHECK:STDOUT: entry:
// 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 %self) #8 !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: declare void @__cxa_pure_virtual() unnamed_addr
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_ZNK1A1FEv(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #9
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: inlinehint mustprogress nounwind uwtable
// CHECK:STDOUT: define linkonce_odr dso_local void @_ZN6Carbon5FinalD0Ev(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 @_ZN6Carbon5FinalD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %this1) #8
// CHECK:STDOUT: call void @_ZdlPvm(ptr noundef %this1, i64 noundef 8) #11
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
// CHECK:STDOUT: define internal void @_ZNK6Carbon5Final1FEv(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 @_ZN6Carbon4BaseD2Ev(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) ({ [5 x ptr] }, ptr @_ZTVN6Carbon4BaseE, i32 0, i32 0, i32 2), 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 @_ZN6Carbon4BaseD0Ev(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 @_ZN6Carbon4BaseD2Ev(ptr noundef nonnull align 8 dead_on_return(8) dereferenceable(8) %this1) #8
// CHECK:STDOUT: call void @_ZdlPvm(ptr noundef %this1, i64 noundef 8) #11
// CHECK:STDOUT: ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress nounwind uwtable
// CHECK:STDOUT: define internal void @_ZNK6Carbon4Base1FEv(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 !71
// CHECK:STDOUT: %this1 = load ptr, ptr %this.addr, align 8
// CHECK:STDOUT: store ptr getelementptr inbounds inrange(-16, 24) ({ [5 x ptr] }, ptr @_ZTV1A, i32 0, i32 0, i32 2), 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 @_ZN6Carbon5FinalD2Ev, { 2, 1, 0 }
// CHECK:STDOUT: uselistorder ptr @__cxa_pure_virtual, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_ZN6Carbon4BaseD2Ev, { 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 = { "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 #10 = { builtin allocsize(0) memory(inaccessiblemem: readwrite, errnomem: write) }
// CHECK:STDOUT: attributes #11 = { builtin nounwind }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.dbg.cu = !{!28}
// CHECK:STDOUT: !llvm.module.flags = !{!77, !78, !79, !11, !12}
// CHECK:STDOUT: !llvm.errno.tbaa = !{!82}
// 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 _ZTSN6Carbon5FinalE", !2, i64 0}
// CHECK:STDOUT: !4 = !{!3, !3, i64 0}
// CHECK:STDOUT: !5 = !{!"p1 _ZTSN6Carbon4BaseE", !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: !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.Destroy.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.Destroy.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.Destroy.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 = !{!"p1 _ZTS1A", !2, i64 0}
// CHECK:STDOUT: !71 = !{!70, !70, i64 0}
// CHECK:STDOUT: !74 = !{}
// CHECK:STDOUT: !75 = !{i64 8}
// CHECK:STDOUT: !77 = !{i32 8, !"PIC Level", i32 2}
// CHECK:STDOUT: !78 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !79 = !{i32 7, !"uwtable", i32 2}
// CHECK:STDOUT: !80 = !{!"int", !1, i64 0}
// CHECK:STDOUT: !81 = !{!"__libc_errno", !80, i64 0}
// CHECK:STDOUT: !82 = !{!81, !80, i64 0}
// CHECK:STDOUT:
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