forked from OSchip/llvm-project
Generalize isSafeToSpeculativelyExecute to work on arbitrary
Values, rather than just Instructions, since it's interesting for ConstantExprs too. llvm-svn: 147560
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@ -174,7 +174,7 @@ namespace llvm {
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/// the correct dominance relationships for the operands and users hold.
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/// However, this method can return true for instructions that read memory;
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/// for such instructions, moving them may change the resulting value.
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bool isSafeToSpeculativelyExecute(const Instruction *Inst,
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bool isSafeToSpeculativelyExecute(const Value *V,
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const TargetData *TD = 0);
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} // end namespace llvm
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@ -1879,8 +1879,12 @@ bool llvm::onlyUsedByLifetimeMarkers(const Value *V) {
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return true;
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}
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bool llvm::isSafeToSpeculativelyExecute(const Instruction *Inst,
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bool llvm::isSafeToSpeculativelyExecute(const Value *V,
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const TargetData *TD) {
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const Operator *Inst = dyn_cast<Operator>(V);
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if (!Inst)
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return false;
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for (unsigned i = 0, e = Inst->getNumOperands(); i != e; ++i)
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if (Constant *C = dyn_cast<Constant>(Inst->getOperand(i)))
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if (C->canTrap())
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