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

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A slight simplification of the code to reduce future diffs.
This commit is contained in:
Florian Hahn 2021-03-24 19:21:37 +00:00
parent 279ea930fa
commit 9d45579279
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GPG Key ID: 61D7554B5CECDC0D
1 changed files with 8 additions and 8 deletions
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16
llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -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]);