================
@@ -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>())
----------------
rnk wrote:
I've realized this misses a case, consider this a wrapper struct that contains
a trivial_abi subobject: https://godbolt.org/z/bK6aGv4d7
I spent 15 minutes looking through the things we track for trivial_abi, and
unfortunately, we don't track this anywhere already, so the best solution I can
come up with is to do a recursive walk of all the subobjects and look for the
attribute. :(
https://github.com/llvm/llvm-project/pull/88857
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