================
@@ -366,9 +387,15 @@ ABIArgInfo ARMABIInfo::classifyArgumentType(QualType Ty,
bool isVariadic,
return getNaturalAlignIndirect(Ty, RAA == CGCXXABI::RAA_DirectInMemory);
}
- // Ignore empty records.
- if (isEmptyRecord(getContext(), Ty, true))
- return ABIArgInfo::getIgnore();
+ // Empty records are either ignored completely or passed as if they were a
+ // 1-byte object, depending on the ABI and language standard.
+ if (isEmptyRecord(getContext(), Ty, true) ||
+ getContext().getTypeSize(Ty) == 0) {
+ if (shouldIgnoreEmptyArg(Ty))
----------------
ostannard wrote:
I wasn't aware of the `-fclang-abi-compat` option, but I think that would be
worth adding for this. I'll also add a release note as suggested in #124760.
https://github.com/llvm/llvm-project/pull/124762
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