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When importing a trivial destructor from C++, produce a no_op builtin. (#6531)

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This avoids us trying to produce a reference to the C++ destructor,
which Clang won't emit because it believes it's unnecessary. This
previously led to link errors.

Fixe #6502.
This commit is contained in:
Richard Smith
2025-12-23 05:30:29 +00:00
committed by GitHub
parent 29018f38a6
commit 531d063596
8 changed files with 81 additions and 47 deletions
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toolchain/lower/testdata/interop/cpp/constructor.carbon
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@@ -77,12 +77,9 @@ fn Copy(c: Cpp.Copy) -> Cpp.Copy {
// CHECK:STDOUT: %.loc7_26.1.temp = alloca [8 x i8], align 1, !dbg !10
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc7_26.1.temp), !dbg !10
// CHECK:STDOUT: call void @_ZN1CC1Ev.carbon_thunk(ptr %.loc7_26.1.temp), !dbg !10
// CHECK:STDOUT: call void @_ZN1CD1Ev(ptr %.loc7_26.1.temp), !dbg !10
// CHECK:STDOUT: ret void, !dbg !11
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_ZN1CD1Ev(ptr)
// 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: