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performance: cache the dereferenced use_iterator

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llvm-svn: 101253
This commit is contained in:
Gabor Greif 2010-04-14 16:48:56 +00:00
parent 6471bcb1fd
commit d482337c1a
1 changed files with 4 additions and 3 deletions
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7
lib/Transforms/Scalar/Reg2Mem.cpp
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@ -46,10 +46,11 @@ namespace {
bool valueEscapes(const Instruction *Inst) const {
const BasicBlock *BB = Inst->getParent();
for (Value::const_use_iterator UI = Inst->use_begin(),E = Inst->use_end();
UI != E; ++UI)
if (cast<Instruction>(*UI)->getParent() != BB ||
isa<PHINode>(*UI))
UI != E; ++UI) {
const Instruction *I = cast<Instruction>(*UI);
if (I->getParent() != BB || isa<PHINode>(I))
return true;
}
return false;
}