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Init vptrs in Carbon initialization of Carbon-derived-from-C++ objects (#7323)

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For review convenience, the Clang patch is available as an LLVM Draft PR
here: https://github.com/llvm/llvm-project/pull/202807
This commit is contained in:
David Blaikie
2026-06-16 04:50:57 +00:00
committed by GitHub
parent 88b3605eac
commit cf6a89db3f
14 changed files with 402 additions and 239 deletions
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toolchain/lower/testdata/interop/cpp/class/import/method.carbon
Vendored
+24
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@@ -98,6 +98,11 @@ fn F(ref r: Cpp.A) {
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZNK1A6by_valEv = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: @_ZTV1A = available_externally unnamed_addr constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr @_ZTI1A, ptr @_ZN4Base5virt0Ev, ptr @_ZN1A5virt1Ev] }, align 8
// CHECK:STDOUT: @_ZTV4Base = available_externally unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI4Base, ptr @_ZN4Base5virt0Ev] }, align 8
// CHECK:STDOUT: @_ZTI1A = external constant ptr
// CHECK:STDOUT: @_ZTI4Base = external constant ptr
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @_CUseVal.Main(ptr %a) #0 !dbg !11 {
// CHECK:STDOUT: entry:
@@ -130,6 +135,9 @@ fn F(ref r: Cpp.A) {
// CHECK:STDOUT: ret i32 %0
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @_ZN4Base5virt0Ev, { 1, 0 }
// 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: attributes #2 = { 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" }
@@ -177,6 +185,11 @@ fn F(ref r: Cpp.A) {
// CHECK:STDOUT:
// CHECK:STDOUT: $_ZN1A6by_refEv = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: @_ZTV1A = available_externally unnamed_addr constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr @_ZTI1A, ptr @_ZN4Base5virt0Ev, ptr @_ZN1A5virt1Ev] }, align 8
// CHECK:STDOUT: @_ZTV4Base = available_externally unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI4Base, ptr @_ZN4Base5virt0Ev] }, align 8
// CHECK:STDOUT: @_ZTI1A = external constant ptr
// CHECK:STDOUT: @_ZTI4Base = external constant ptr
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @_CUseVal.Main(ptr %a) #0 !dbg !11 {
// CHECK:STDOUT: entry:
@@ -199,6 +212,9 @@ fn F(ref r: Cpp.A) {
// CHECK:STDOUT: ret i32 %0
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @_ZN4Base5virt0Ev, { 1, 0 }
// 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: attributes #2 = { 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" }
@@ -238,6 +254,11 @@ fn F(ref r: Cpp.A) {
// 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: @_ZTV1A = available_externally unnamed_addr constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr @_ZTI1A, ptr @_ZN4Base5virt0Ev, ptr @_ZN1A5virt1Ev] }, align 8
// CHECK:STDOUT: @_ZTV4Base = available_externally unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI4Base, ptr @_ZN4Base5virt0Ev] }, align 8
// CHECK:STDOUT: @_ZTI1A = external constant ptr
// CHECK:STDOUT: @_ZTI4Base = external constant ptr
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CUseVal.Main(ptr %a) #0 !dbg !11 {
// CHECK:STDOUT: entry:
@@ -257,6 +278,9 @@ fn F(ref r: Cpp.A) {
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_ZN1A5virt1Ev(ptr noundef nonnull align 8 dereferenceable(12)) unnamed_addr #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @_ZN4Base5virt0Ev, { 1, 0 }
// 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: