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random tidying

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83701 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-10-10 06:22:45 +00:00
parent bcea859fc1
commit 2d7f1d24bf
2 changed files with 12 additions and 12 deletions
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12
lib/Transforms/Scalar/GVN.cpp
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@@ -816,8 +816,9 @@ Value *GVN::GetValueForBlock(BasicBlock *BB, Instruction *Orig,
else
NumPreds = std::distance(pred_begin(BB), pred_end(BB));
// Otherwise, the idom is the loop, so we need to insert a PHI node. Do so
// now, then get values to fill in the incoming values for the PHI.
// Otherwise, we may need to insert a PHI node. Do so now, then get values to
// fill in the incoming values for the PHI. If the PHI ends up not being
// needed, we can always remove it later.
PHINode *PN = PHINode::Create(Orig->getType(), Orig->getName()+".rle",
BB->begin());
PN->reserveOperandSpace(NumPreds);
@@ -832,7 +833,8 @@ Value *GVN::GetValueForBlock(BasicBlock *BB, Instruction *Orig,
VN.getAliasAnalysis()->copyValue(Orig, PN);
// Attempt to collapse PHI nodes that are trivially redundant
// Attempt to collapse PHI nodes that are trivially redundant. This happens
// when we construct a PHI that ends up not being needed.
Value *v = CollapsePhi(PN);
if (!v) {
// Cache our phi construction results
@@ -1777,8 +1779,8 @@ Value *GVN::AttemptRedundancyElimination(Instruction *orig, unsigned valno) {
// If we didn't find instances, give up. Otherwise, perform phi construction.
if (Results.size() == 0)
return 0;
else
return GetValueForBlock(BaseBlock, orig, Results, true);
return GetValueForBlock(BaseBlock, orig, Results, true);
}
/// processInstruction - When calculating availability, handle an instruction