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reuse result of operator*, it is expensive to recompute

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llvm-svn: 107959
This commit is contained in:
Gabor Greif 2010-07-09 09:50:51 +00:00
parent 67f0ebc5c6
commit d266b0fcd8
1 changed files with 5 additions and 3 deletions
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8
include/llvm/Analysis/LoopInfo.h
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@ -757,9 +757,11 @@ public:
typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;
for (typename InvBlockTraits::ChildIteratorType I =
InvBlockTraits::child_begin(BB), E = InvBlockTraits::child_end(BB);
I != E; ++I)
if (DT.dominates(BB, *I)) // If BB dominates its predecessor...
TodoStack.push_back(*I);
I != E; ++I) {
typename InvBlockTraits::NodeType *N = *I;
if (DT.dominates(BB, N)) // If BB dominates its predecessor...
TodoStack.push_back(N);
}
if (TodoStack.empty()) return 0; // No backedges to this block...