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Rename ExitCount to BackedgeTakenCount, because that's what it is. 

We called a variable ExitCount, stored the backedge count in it, then redefined it to be the exit count again.

llvm-svn: 247140
This commit is contained in:
James Molloy 2015-09-09 12:51:10 +00:00
parent 89eccee4db
commit 520838977b
1 changed files with 9 additions and 8 deletions
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17
llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -2605,8 +2605,8 @@ Value *InnerLoopVectorizer::getOrCreateTripCount(Loop *L) {
IRBuilder<> Builder(L->getLoopPreheader()->getTerminator());
// Find the loop boundaries.
const SCEV *ExitCount = SE->getBackedgeTakenCount(OrigLoop);
assert(ExitCount != SE->getCouldNotCompute() && "Invalid loop count");
const SCEV *BackedgeTakenCount = SE->getBackedgeTakenCount(OrigLoop);
assert(BackedgeTakenCount != SE->getCouldNotCompute() && "Invalid loop count");
Type *IdxTy = Legal->getWidestInductionType();
@ -2615,14 +2615,15 @@ Value *InnerLoopVectorizer::getOrCreateTripCount(Loop *L) {
// compare. The only way that we get a backedge taken count is that the
// induction variable was signed and as such will not overflow. In such a case
// truncation is legal.
if (ExitCount->getType()->getPrimitiveSizeInBits() >
if (BackedgeTakenCount->getType()->getPrimitiveSizeInBits() >
IdxTy->getPrimitiveSizeInBits())
ExitCount = SE->getTruncateOrNoop(ExitCount, IdxTy);
const SCEV *BackedgeTakeCount = SE->getNoopOrZeroExtend(ExitCount, IdxTy);
BackedgeTakenCount = SE->getTruncateOrNoop(BackedgeTakenCount, IdxTy);
BackedgeTakenCount = SE->getNoopOrZeroExtend(BackedgeTakenCount, IdxTy);
// Get the total trip count from the count by adding 1.
ExitCount = SE->getAddExpr(BackedgeTakeCount,
SE->getConstant(BackedgeTakeCount->getType(), 1));
const SCEV *ExitCount =
SE->getAddExpr(BackedgeTakenCount,
SE->getConstant(BackedgeTakenCount->getType(), 1));
const DataLayout &DL = L->getHeader()->getModule()->getDataLayout();