================
@@ -1105,6 +1105,11 @@ bool MicrosoftCXXABI::hasMostDerivedReturn(GlobalDecl
GD) const {
static bool isTrivialForMSVC(const CXXRecordDecl *RD, QualType Ty,
CodeGenModule &CGM) {
+ // If the record is marked with the trivial_abi attribute, we don't
+ // have to conform to the standard MSVC ABI.
+ if (RD->hasAttr<TrivialABIAttr>())
----------------
efriedma-quic wrote:
Oh, I see, whether the constructors/destructor/etc. are trivial for calls is
determined recursively; we don't record whether that was because of an explicit
trivial_abi attribute, or because there just weren't any non-trivial fields.
So we can't tell the difference here.
It feels sort of weird to treat a struct with a trivial_abi member as somehow
more trivial than a struct that just contains plain data.
https://github.com/llvm/llvm-project/pull/88857
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