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Do not add cse-ed instructions into the visited map because we dont want to consider them as a candidate for replacement of instructions to be visited.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184966 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
2013-06-26 16:54:53 +00:00
parent c19bd32136
commit 29acf7e03a
2 changed files with 93 additions and 5 deletions
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14
lib/Transforms/Vectorize/SLPVectorizer.cpp
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@ -1258,6 +1258,8 @@ Value *FuncSLP::vectorizeArith(ArrayRef<Value *> Operands) {
for (unsigned i = 0, e = Operands.size(); i != e; ++i) {
Value *S = Builder.CreateExtractElement(Vec, Builder.getInt32(i));
Operands[i]->replaceAllUsesWith(S);
Instruction *I = cast<Instruction>(Operands[i]);
I->eraseFromParent();
}
return Vec;
@ -1280,7 +1282,7 @@ void FuncSLP::optimizeGatherSequence() {
// Check if it has a preheader.
BasicBlock *PreHeader = L->getLoopPreheader();
if (!PreHeader)
return;
continue;
// If the vector or the element that we insert into it are
// instructions that are defined in this basic block then we can't
@ -1310,17 +1312,19 @@ void FuncSLP::optimizeGatherSequence() {
if (!Insert || !GatherSeq.count(Insert))
continue;
// Check if we can replace this instruction with any of the
// visited instructions.
// Check if we can replace this instruction with any of the
// visited instructions.
for (SmallPtrSet<Instruction*, 16>::iterator v = Visited.begin(),
ve = Visited.end(); v != ve; ++v) {
if (Insert->isIdenticalTo(*v) &&
DT->dominates((*v)->getParent(), Insert->getParent())) {
DT->dominates((*v)->getParent(), Insert->getParent())) {
Insert->replaceAllUsesWith(*v);
Insert = 0;
break;
}
}
Visited.insert(Insert);
if (Insert)
Visited.insert(Insert);
}
}
}