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[NewGVN] Fold single-use variables. NFCI. 

llvm-svn: 309790
This commit is contained in:
Davide Italiano 2017-08-02 04:05:49 +00:00
parent b13a3fa41b
commit c2f73b7fae
1 changed files with 3 additions and 5 deletions
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8
llvm/lib/Transforms/Scalar/NewGVN.cpp
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@ -781,11 +781,9 @@ bool StoreExpression::equals(const Expression &Other) const {
// Determine if the edge From->To is a backedge
bool NewGVN::isBackedge(BasicBlock *From, BasicBlock *To) const {
if (From == To)
return true;
auto *FromDTN = DT->getNode(From);
auto *ToDTN = DT->getNode(To);
return RPOOrdering.lookup(FromDTN) >= RPOOrdering.lookup(ToDTN);
return From == To ||
RPOOrdering.lookup(DT->getNode(From)) >=
RPOOrdering.lookup(DT->getNode(To));
}
#ifndef NDEBUG