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SLP Vectorizer: Erase instructions outside the vectorizeTree method. 

The RAII builder location guard is saving a reference to instructions, so we can't erase instructions during vectorization.

llvm-svn: 184671
This commit is contained in:
Nadav Rotem 2013-06-23 19:38:56 +00:00
parent 5acff7e691
commit 78428401e9
1 changed files with 11 additions and 3 deletions
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14
llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
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@ -848,6 +848,12 @@ bool FuncSLP::vectorizeStoreChain(ArrayRef<Value *> Chain, int CostThreshold) {
if (Cost < CostThreshold) {
DEBUG(dbgs() << "SLP: Decided to vectorize cost=" << Cost << "\n");
vectorizeTree(Operands);
// Remove the scalar stores.
for (int i = 0, e = VF; i < e; ++i)
cast<Instruction>(Operands[i])->eraseFromParent();
// Move to the next bundle.
i += VF - 1;
Changed = true;
}
@ -865,6 +871,11 @@ bool FuncSLP::vectorizeStoreChain(ArrayRef<Value *> Chain, int CostThreshold) {
DEBUG(dbgs() << "SLP: Found store chain cost = " << Cost
<< " for size = " << ChainLen << "\n");
vectorizeTree(Chain);
// Remove all of the scalar stores.
for (int i = 0, e = Chain.size(); i < e; ++i)
cast<Instruction>(Chain[i])->eraseFromParent();
return true;
}
@ -1100,9 +1111,6 @@ Value *FuncSLP::vectorizeTree_rec(ArrayRef<Value *> VL) {
Value *VecPtr =
Builder.CreateBitCast(SI->getPointerOperand(), VecTy->getPointerTo());
Builder.CreateStore(VecValue, VecPtr)->setAlignment(Alignment);
for (int i = 0, e = VL.size(); i < e; ++i)
cast<Instruction>(VL[i])->eraseFromParent();
return 0;
}
default: