================
@@ -3011,26 +3013,80 @@ bool SemaOpenACC::CreateReductionCombinerRecipe(
assert(!VarTy->isArrayType() && "Only 1 level of array allowed");
+ enum class CombinerFailureKind {
+ None = 0,
+ BinOp = 1,
+ Conditional = 2,
+ Assignment = 3,
+ };
+
+ auto genCombiner = [&, this](DeclRefExpr *LHSDRE, DeclRefExpr *RHSDRE)
+ -> std::pair<ExprResult, CombinerFailureKind> {
+ ExprResult BinOpRes =
+ SemaRef.BuildBinOp(SemaRef.getCurScope(), Loc, BinOp, LHSDRE, RHSDRE,
+ /*ForFoldExpr=*/false);
+ switch (ReductionOperator) {
+ case OpenACCReductionOperator::Addition:
+ case OpenACCReductionOperator::Multiplication:
+ case OpenACCReductionOperator::BitwiseAnd:
+ case OpenACCReductionOperator::BitwiseOr:
+ case OpenACCReductionOperator::BitwiseXOr:
+ // These 5 are simple and are being done as compound operators, so we
can
+ // immediately quit here.
+ return {BinOpRes, BinOpRes.isUsable() ? CombinerFailureKind::None
+ : CombinerFailureKind::BinOp};
+ case OpenACCReductionOperator::Max:
+ case OpenACCReductionOperator::Min: {
+ // These are done as:
+ // LHS = (LHS < RHS) ? LHS : RHS; and LHS = (LHS < RHS) ? RHS : LHS;
----------------
andykaylor wrote:
Does the spec say anything about how `NaN` should be handled for min and max
with floating point types? I think this implementation will have problems with
that.
https://github.com/llvm/llvm-project/pull/163656
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