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LSR: Minor cleanup after Daniel's patch.

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Combine the Inserted an Done sets into a Visited set.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220623 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2014-10-25 19:59:30 +00:00
parent abb11dd303
commit 916ba45c62
1 changed files with 2 additions and 4 deletions
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6
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -3116,14 +3116,13 @@ bool LSRInstance::InsertFormula(LSRUse &LU, unsigned LUIdx, const Formula &F) {
void
LSRInstance::CollectLoopInvariantFixupsAndFormulae() {
SmallVector<const SCEV *, 8> Worklist(RegUses.begin(), RegUses.end());
SmallPtrSet<const SCEV *, 8> Inserted;
SmallPtrSet<const SCEV *, 32> Done;
SmallPtrSet<const SCEV *, 32> Visited;
while (!Worklist.empty()) {
const SCEV *S = Worklist.pop_back_val();
// Don't process the same SCEV twice
if (!Done.insert(S))
if (!Visited.insert(S))
continue;
if (const SCEVNAryExpr *N = dyn_cast<SCEVNAryExpr>(S))
@ -3134,7 +3133,6 @@ LSRInstance::CollectLoopInvariantFixupsAndFormulae() {
Worklist.push_back(D->getLHS());
Worklist.push_back(D->getRHS());
} else if (const SCEVUnknown *US = dyn_cast<SCEVUnknown>(S)) {
if (!Inserted.insert(US)) continue;
const Value *V = US->getValue();
if (const Instruction *Inst = dyn_cast<Instruction>(V)) {
// Look for instructions defined outside the loop.