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Change PHINode::hasConstantValue to have a DominatorTree argument

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instead of a bool argument, and to do the dominator check itself.
This makes it eaiser to use when DominatorTree information is
available.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80920 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-09-03 15:34:35 +00:00
parent dd12de686c
commit bccfc24c4e
7 changed files with 49 additions and 37 deletions
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2
lib/Transforms/Scalar/GVN.cpp
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@ -769,7 +769,7 @@ static bool isSafeReplacement(PHINode* p, Instruction* inst) {
}
Value* GVN::CollapsePhi(PHINode* p) {
Value* constVal = p->hasConstantValue();
Value* constVal = p->hasConstantValue(DT);
if (!constVal) return 0;
Instruction* inst = dyn_cast<Instruction>(constVal);