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Add constant folding capabilities to the isunordered intrinsic. 

llvm-svn: 14168
This commit is contained in:
Alkis Evlogimenos 2004-06-13 01:23:56 +00:00
parent 0fa392310a
commit e395468ae5
1 changed files with 4 additions and 1 deletions
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5
llvm/lib/Transforms/Utils/Local.cpp
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@ -238,6 +238,7 @@ bool llvm::canConstantFoldCallTo(Function *F) {
switch (F->getIntrinsicID()) {
case Intrinsic::isnan: return true;
case Intrinsic::isunordered: return true;
default: break;
}
@ -293,7 +294,9 @@ Constant *llvm::ConstantFoldCall(Function *F,
if (ConstantFP *Op2 = dyn_cast<ConstantFP>(Operands[1])) {
double Op1V = Op1->getValue(), Op2V = Op2->getValue();
if (Name == "pow") {
if (Name == "llvm.isunordered")
return ConstantBool::get(isnan(Op1V) | isnan(Op2V));
else if (Name == "pow") {
errno = 0;
double V = pow(Op1V, Op2V);
if (errno == 0)