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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133991 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2011-06-28 05:04:16 +00:00
parent 89991d4413
commit a5d950f673
1 changed files with 8 additions and 8 deletions
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16
lib/Transforms/Scalar/LoopIdiomRecognize.cpp
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@ -167,7 +167,7 @@ static void deleteDeadInstruction(Instruction *I, ScalarEvolution &SE) {
static void deleteIfDeadInstruction(Value *V, ScalarEvolution &SE) {
if (Instruction *I = dyn_cast<Instruction>(V))
if (isInstructionTriviallyDead(I))
deleteDeadInstruction(I, SE);
deleteDeadInstruction(I, SE);
}
bool LoopIdiomRecognize::runOnLoop(Loop *L, LPPassManager &LPM) {
@ -468,7 +468,7 @@ processLoopStridedStore(Value *DestPtr, unsigned StoreSize,
BasicBlock *Preheader = CurLoop->getLoopPreheader();
IRBuilder<> Builder(Preheader->getTerminator());
SCEVExpander Expander(*SE);
// Okay, we have a strided store "p[i]" of a splattable value. We can turn
// this into a memset in the loop preheader now if we want. However, this
// would be unsafe to do if there is anything else in the loop that may read
@ -488,7 +488,7 @@ processLoopStridedStore(Value *DestPtr, unsigned StoreSize,
deleteIfDeadInstruction(BasePtr, *SE);
return false;
}
// Okay, everything looks good, insert the memset.
// The # stored bytes is (BECount+1)*Size. Expand the trip count out to
@ -557,7 +557,7 @@ processLoopStoreOfLoopLoad(StoreInst *SI, unsigned StoreSize,
BasicBlock *Preheader = CurLoop->getLoopPreheader();
IRBuilder<> Builder(Preheader->getTerminator());
SCEVExpander Expander(*SE);
// Okay, we have a strided store "p[i]" of a loaded value. We can turn
// this into a memcpy in the loop preheader now if we want. However, this
// would be unsafe to do if there is anything else in the loop that may read
@ -568,7 +568,7 @@ processLoopStoreOfLoopLoad(StoreInst *SI, unsigned StoreSize,
Expander.expandCodeFor(StoreEv->getStart(),
Builder.getInt8PtrTy(SI->getPointerAddressSpace()),
Preheader->getTerminator());
if (mayLoopAccessLocation(StoreBasePtr, AliasAnalysis::ModRef,
CurLoop, BECount, StoreSize,
getAnalysis<AliasAnalysis>(), SI)) {
@ -593,9 +593,9 @@ processLoopStoreOfLoopLoad(StoreInst *SI, unsigned StoreSize,
deleteIfDeadInstruction(StoreBasePtr, *SE);
return false;
}
// Okay, everything is safe, we can transform this!
// The # stored bytes is (BECount+1)*Size. Expand the trip count out to
// pointer size if it isn't already.
@ -619,7 +619,7 @@ processLoopStoreOfLoopLoad(StoreInst *SI, unsigned StoreSize,
DEBUG(dbgs() << " Formed memcpy: " << *NewCall << "\n"
<< " from load ptr=" << *LoadEv << " at: " << *LI << "\n"
<< " from store ptr=" << *StoreEv << " at: " << *SI << "\n");
// Okay, the memset has been formed. Zap the original store and anything that
// feeds into it.