[llvm-branch-commits] [llvm] [LoopVectorizer] Bundle partial reductions inside VPMulAccumulateReductionRecipe (PR #136173)

[Sam Tebbs via llvm-branch-commits]

================
@@ -986,11 +986,23 @@ InstructionCost TargetTransformInfo::getShuffleCost(
 
 TargetTransformInfo::PartialReductionExtendKind
 TargetTransformInfo::getPartialReductionExtendKind(Instruction *I) {
-  if (isa<SExtInst>(I))
-    return PR_SignExtend;
-  if (isa<ZExtInst>(I))
+  auto *Cast = dyn_cast<CastInst>(I);
+  if (!Cast)
+    return PR_None;
+  return getPartialReductionExtendKind(Cast->getOpcode());
+}
+
+TargetTransformInfo::PartialReductionExtendKind
+TargetTransformInfo::getPartialReductionExtendKind(
+    Instruction::CastOps ExtOpcode) {
+  switch (ExtOpcode) {
+  case Instruction::CastOps::ZExt:
     return PR_ZeroExtend;
-  return PR_None;
+  case Instruction::CastOps::SExt:
+    return PR_SignExtend;
+  default:
+    return PR_None;
----------------
SamTebbs33 wrote:

Done.

https://github.com/llvm/llvm-project/pull/136173