[LV] Factor out phi type access to variable (NFC).

A slight simplification of the code to reduce future diffs.

diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 1ecb34b..7c90b72 100644 (file)
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -4268,6 +4268,7 @@ void InnerLoopVectorizer::fixReduction(PHINode *Phi, VPTransformState &State) {
 
   setDebugLocFromInst(Builder, LoopExitInst);
 
+  Type *PhiTy = Phi->getType();
   // If tail is folded by masking, the vector value to leave the loop should be
   // a Select choosing between the vectorized LoopExitInst and vectorized Phi,
   // instead of the former. For an inloop reduction the reduction will already
@@ -4293,7 +4294,7 @@ void InnerLoopVectorizer::fixReduction(PHINode *Phi, VPTransformState &State) {
       // LoopExitValue.
       if (PreferPredicatedReductionSelect ||
           TTI->preferPredicatedReductionSelect(
-              RdxDesc.getOpcode(), Phi->getType(),
+              RdxDesc.getOpcode(), PhiTy,
               TargetTransformInfo::ReductionFlags())) {
         auto *VecRdxPhi =
             cast<PHINode>(State.get(State.Plan->getVPValue(Phi), Part));
@@ -4306,7 +4307,7 @@ void InnerLoopVectorizer::fixReduction(PHINode *Phi, VPTransformState &State) {
   // If the vector reduction can be performed in a smaller type, we truncate
   // then extend the loop exit value to enable InstCombine to evaluate the
   // entire expression in the smaller type.
-  if (VF.isVector() && Phi->getType() != RdxDesc.getRecurrenceType()) {
+  if (VF.isVector() && PhiTy != RdxDesc.getRecurrenceType()) {
     assert(!IsInLoopReductionPhi && "Unexpected truncated inloop reduction!");
     assert(!VF.isScalable() && "scalable vectors not yet supported.");
     Type *RdxVecTy = VectorType::get(RdxDesc.getRecurrenceType(), VF);
@@ -4368,16 +4369,15 @@ void InnerLoopVectorizer::fixReduction(PHINode *Phi, VPTransformState &State) {
         createTargetReduction(Builder, TTI, RdxDesc, ReducedPartRdx);
     // If the reduction can be performed in a smaller type, we need to extend
     // the reduction to the wider type before we branch to the original loop.
-    if (Phi->getType() != RdxDesc.getRecurrenceType())
-      ReducedPartRdx =
-        RdxDesc.isSigned()
-        ? Builder.CreateSExt(ReducedPartRdx, Phi->getType())
-        : Builder.CreateZExt(ReducedPartRdx, Phi->getType());
+    if (PhiTy != RdxDesc.getRecurrenceType())
+      ReducedPartRdx = RdxDesc.isSigned()
+                           ? Builder.CreateSExt(ReducedPartRdx, PhiTy)
+                           : Builder.CreateZExt(ReducedPartRdx, PhiTy);
   }
 
   // Create a phi node that merges control-flow from the backedge-taken check
   // block and the middle block.
-  PHINode *BCBlockPhi = PHINode::Create(Phi->getType(), 2, "bc.merge.rdx",
+  PHINode *BCBlockPhi = PHINode::Create(PhiTy, 2, "bc.merge.rdx",
                                         LoopScalarPreHeader->getTerminator());
   for (unsigned I = 0, E = LoopBypassBlocks.size(); I != E; ++I)
     BCBlockPhi->addIncoming(ReductionStartValue, LoopBypassBlocks[I]);