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do not repeatedly dereference use_iterator

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107962 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Gabor Greif 2010-07-09 12:23:50 +00:00
parent 8fe5ccc585
commit b654435712
1 changed files with 4 additions and 3 deletions
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7
lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
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@ -365,10 +365,11 @@ DbgDeclareInst *InstCombiner::hasOneUsePlusDeclare(Value *V) {
return 0;
for (Value::use_iterator UI = V->use_begin(), E = V->use_end();
UI != E; ++UI) {
if (DbgDeclareInst *DI = dyn_cast<DbgDeclareInst>(UI))
User *U = *UI;
if (DbgDeclareInst *DI = dyn_cast<DbgDeclareInst>(U))
return DI;
if (isa<BitCastInst>(UI) && UI->hasOneUse()) {
if (DbgDeclareInst *DI = dyn_cast<DbgDeclareInst>(UI->use_begin()))
if (isa<BitCastInst>(U) && U->hasOneUse()) {
if (DbgDeclareInst *DI = dyn_cast<DbgDeclareInst>(U->use_begin()))
return DI;
}
}