================
@@ -307,7 +307,12 @@ AArch64ABIInfo::classifyArgumentType(QualType Ty, bool
IsVariadic,
// 0.
if (IsEmpty && Size == 0)
return ABIArgInfo::getIgnore();
- return ABIArgInfo::getDirect(llvm::Type::getInt8Ty(getVMContext()));
+ // An empty struct can have size greater than one byte if alignment is
+ // involved.
+ // When size <= 64, we still hold it by i8 in IR and lowering to registers.
+ // When Size > 64, just fall through to avoid va_list out of sync.
----------------
hstk30-hw wrote:
https://github.com/llvm/llvm-project/commit/9bb857a4f1aec1c33d599672defb46b98d792719#diff-d5392fbd34fbb607cc468738adce16985f9461c9a3f5bc7c5ed64dba44137d19R3752
This is I can found when the `i8` was introduced. Guess @TNorthover know it.
https://github.com/llvm/llvm-project/pull/72197
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
