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Generalize isSafeToSpeculativelyExecute to work on arbitrary

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Values, rather than just Instructions, since it's interesting
for ConstantExprs too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147560 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2012-01-04 23:01:09 +00:00
parent a5f8942e05
commit febaf84017
2 changed files with 6 additions and 2 deletions
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lib/Analysis/ValueTracking.cpp
+5 -1
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@@ -1879,8 +1879,12 @@ bool llvm::onlyUsedByLifetimeMarkers(const Value *V) {
return true;
}
bool llvm::isSafeToSpeculativelyExecute(const Instruction *Inst,
bool llvm::isSafeToSpeculativelyExecute(const Value *V,
const TargetData *TD) {
const Operator *Inst = dyn_cast<Operator>(V);
if (!Inst)
return false;
for (unsigned i = 0, e = Inst->getNumOperands(); i != e; ++i)
if (Constant *C = dyn_cast<Constant>(Inst->getOperand(i)))
if (C->canTrap())