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- Fix bug: Mem2Reg/2002-05-01-ShouldNotPromoteThisAlloca.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3917 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-09-24 21:19:41 +00:00
parent 2ada19ea04
commit 112e97dbee
1 changed files with 7 additions and 2 deletions
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9
lib/Transforms/Utils/PromoteMemoryToRegister.cpp
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@ -79,8 +79,13 @@ static inline bool isSafeAlloca(const AllocaInst *AI) {
// Only allow direct loads and stores...
for (Value::use_const_iterator UI = AI->use_begin(), UE = AI->use_end();
UI != UE; ++UI) // Loop over all of the uses of the alloca
if (!isa<LoadInst>(*UI) && !isa<StoreInst>(*UI))
return false; // Not a load or store?
if (!isa<LoadInst>(*UI))
if (const StoreInst *SI = dyn_cast<StoreInst>(*UI)) {
if (SI->getOperand(0) == AI)
return false; // Don't allow a store of the AI, only INTO the AI.
} else {
return false; // Not a load or store?
}
return true;
}