================
@@ -648,9 +648,15 @@ ExprResult CheckVarType(SemaOpenACC &S, OpenACCClauseKind
CK, Expr *VarExpr,
InnerTy = RefTy->getPointeeType();
if (auto *ArrTy = InnerTy->getAsArrayTypeUnsafe()) {
- // Non constant arrays decay to 'pointer', so warn and return that we're
- // successful.
if (!ArrTy->isConstantArrayType()) {
+ // Variable length arrays cannot be used in a reduction clause.
+ // To fix llvm/llvm-project#199162
+ if (CK == OpenACCClauseKind::Reduction) {
+ S.Diag(InnerLoc, clang::diag::err_acc_reduction_non_const_array);
----------------
erichkeane wrote:
See the other places we do this, we should probably also emit the reduction
'note'.
https://github.com/llvm/llvm-project/pull/199178
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