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[EarlyCSE] reduce indent; NFCI 

llvm-svn: 297886
This commit is contained in:
Sanjay Patel 2017-03-15 20:25:05 +00:00
parent 6c38e71476
commit f1e1fba1b0
1 changed files with 22 additions and 21 deletions
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43
llvm/lib/Transforms/Scalar/EarlyCSE.cpp
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@ -591,27 +591,28 @@ bool EarlyCSE::processNode(DomTreeNode *Node) {
// which reaches this block where the condition might hold a different
// value. Since we're adding this to the scoped hash table (like any other
// def), it will have been popped if we encounter a future merge block.
if (BasicBlock *Pred = BB->getSinglePredecessor())
if (auto *BI = dyn_cast<BranchInst>(Pred->getTerminator()))
if (BI->isConditional())
if (auto *CondInst = dyn_cast<Instruction>(BI->getCondition()))
if (SimpleValue::canHandle(CondInst)) {
assert(BI->getSuccessor(0) == BB || BI->getSuccessor(1) == BB);
auto *ConditionalConstant = (BI->getSuccessor(0) == BB) ?
ConstantInt::getTrue(BB->getContext()) :
ConstantInt::getFalse(BB->getContext());
AvailableValues.insert(CondInst, ConditionalConstant);
DEBUG(dbgs() << "EarlyCSE CVP: Add conditional value for '"
<< CondInst->getName() << "' as " << *ConditionalConstant
<< " in " << BB->getName() << "\n");
// Replace all dominated uses with the known value.
if (unsigned Count =
replaceDominatedUsesWith(CondInst, ConditionalConstant, DT,
BasicBlockEdge(Pred, BB))) {
Changed = true;
NumCSECVP = NumCSECVP + Count;
}
}
if (BasicBlock *Pred = BB->getSinglePredecessor()) {
auto *BI = dyn_cast<BranchInst>(Pred->getTerminator());
if (BI && BI->isConditional()) {
auto *CondInst = dyn_cast<Instruction>(BI->getCondition());
if (CondInst && SimpleValue::canHandle(CondInst)) {
assert(BI->getSuccessor(0) == BB || BI->getSuccessor(1) == BB);
auto *TorF = (BI->getSuccessor(0) == BB)
? ConstantInt::getTrue(BB->getContext())
: ConstantInt::getFalse(BB->getContext());
AvailableValues.insert(CondInst, TorF);
DEBUG(dbgs() << "EarlyCSE CVP: Add conditional value for '"
<< CondInst->getName() << "' as " << *TorF << " in "
<< BB->getName() << "\n");
// Replace all dominated uses with the known value.
if (unsigned Count = replaceDominatedUsesWith(
CondInst, TorF, DT, BasicBlockEdge(Pred, BB))) {
Changed = true;
NumCSECVP = NumCSECVP + Count;
}
}
}
}
/// LastStore - Keep track of the last non-volatile store that we saw... for
/// as long as there in no instruction that reads memory. If we see a store