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cache result of operator*

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llvm-svn: 107966
This commit is contained in:
Gabor Greif 2010-07-09 14:18:23 +00:00
parent cda479a708
commit a5fdd0955d
1 changed files with 5 additions and 3 deletions
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8
lib/Transforms/Utils/PromoteMemoryToRegister.cpp
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@ -69,11 +69,12 @@ bool llvm::isAllocaPromotable(const AllocaInst *AI) {
// Only allow direct and non-volatile loads and stores...
for (Value::const_use_iterator UI = AI->use_begin(), UE = AI->use_end();
UI != UE; ++UI) // Loop over all of the uses of the alloca
if (const LoadInst *LI = dyn_cast<LoadInst>(*UI)) {
UI != UE; ++UI) { // Loop over all of the uses of the alloca
const User *U = *UI;
if (const LoadInst *LI = dyn_cast<LoadInst>(U)) {
if (LI->isVolatile())
return false;
} else if (const StoreInst *SI = dyn_cast<StoreInst>(*UI)) {
} else if (const StoreInst *SI = dyn_cast<StoreInst>(U)) {
if (SI->getOperand(0) == AI)
return false; // Don't allow a store OF the AI, only INTO the AI.
if (SI->isVolatile())
@ -81,6 +82,7 @@ bool llvm::isAllocaPromotable(const AllocaInst *AI) {
} else {
return false;
}
}
return true;
}