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cache result of operator*

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107966 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Gabor Greif
2010-07-09 14:18:23 +00:00
parent 9672414017
commit 5417a03b55
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... // Only allow direct and non-volatile loads and stores...
for (Value::const_use_iterator UI = AI->use_begin(), UE = AI->use_end(); 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 UI != UE; ++UI) { // Loop over all of the uses of the alloca
if (const LoadInst *LI = dyn_cast<LoadInst>(*UI)) { const User *U = *UI;
if (const LoadInst *LI = dyn_cast<LoadInst>(U)) {
if (LI->isVolatile()) if (LI->isVolatile())
return false; 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) if (SI->getOperand(0) == AI)
return false; // Don't allow a store OF the AI, only INTO the AI. return false; // Don't allow a store OF the AI, only INTO the AI.
if (SI->isVolatile()) if (SI->isVolatile())
@@ -81,6 +82,7 @@ bool llvm::isAllocaPromotable(const AllocaInst *AI) {
} else { } else {
return false; return false;
} }
}
return true; return true;
} }