================
@@ -8306,6 +8316,14 @@ static void HandleExtVectorTypeAttr(QualType &CurType,
const ParsedAttr &Attr,
QualType T = S.BuildExtVectorType(CurType, SizeExpr, Attr.getLoc());
if (!T.isNull())
CurType = T;
+
+ std::optional<llvm::APSInt> VecSize =
+ SizeExpr->getIntegerConstantExpr(S.Context);
+ if (VecSize && VecSize->isNegative()) {
----------------
AaronBallman wrote:
Similar, I think this should live in `BuildExtVectorType()`.
https://github.com/llvm/llvm-project/pull/166055
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