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Cleanup some of the constant folding code to consistently test intrinsic

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IDs when available rather than using a mixture of IDs and textual name
comparisons.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123165 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2011-01-10 09:02:58 +00:00
parent 622a11bc07
commit f4db877cff
1 changed files with 18 additions and 16 deletions
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34
lib/Analysis/ConstantFolding.cpp
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@ -1127,7 +1127,7 @@ llvm::ConstantFoldCall(Function *F,
const Type *Ty = F->getReturnType();
if (NumOperands == 1) {
if (ConstantFP *Op = dyn_cast<ConstantFP>(Operands[0])) {
if (Name == "llvm.convert.to.fp16") {
if (F->getIntrinsicID() == Intrinsic::convert_to_fp16) {
APFloat Val(Op->getValueAPF());
bool lost = false;
@ -1185,8 +1185,8 @@ llvm::ConstantFoldCall(Function *F,
return ConstantFoldFP(log, V, Ty);
else if (Name == "log10" && V > 0)
return ConstantFoldFP(log10, V, Ty);
else if (Name == "llvm.sqrt.f32" ||
Name == "llvm.sqrt.f64") {
else if (F->getIntrinsicID() == Intrinsic::sqrt &&
(Ty->isFloatTy() || Ty->isDoubleTy())) {
if (V >= -0.0)
return ConstantFoldFP(sqrt, V, Ty);
else // Undefined
@ -1216,18 +1216,18 @@ llvm::ConstantFoldCall(Function *F,
}
return 0;
}
if (ConstantInt *Op = dyn_cast<ConstantInt>(Operands[0])) {
if (Name.startswith("llvm.bswap"))
switch (F->getIntrinsicID()) {
case Intrinsic::bswap:
return ConstantInt::get(F->getContext(), Op->getValue().byteSwap());
else if (Name.startswith("llvm.ctpop"))
case Intrinsic::ctpop:
return ConstantInt::get(Ty, Op->getValue().countPopulation());
else if (Name.startswith("llvm.cttz"))
case Intrinsic::cttz:
return ConstantInt::get(Ty, Op->getValue().countTrailingZeros());
else if (Name.startswith("llvm.ctlz"))
case Intrinsic::ctlz:
return ConstantInt::get(Ty, Op->getValue().countLeadingZeros());
else if (Name == "llvm.convert.from.fp16") {
case Intrinsic::convert_from_fp16: {
APFloat Val(Op->getValue());
bool lost = false;
@ -1241,18 +1241,20 @@ llvm::ConstantFoldCall(Function *F,
return ConstantFP::get(F->getContext(), Val);
}
return 0;
default:
return 0;
}
}
if (isa<UndefValue>(Operands[0])) {
if (Name.startswith("llvm.bswap"))
if (F->getIntrinsicID() == Intrinsic::bswap)
return Operands[0];
return 0;
}
return 0;
}
if (NumOperands == 2) {
if (ConstantFP *Op1 = dyn_cast<ConstantFP>(Operands[0])) {
if (!Ty->isFloatTy() && !Ty->isDoubleTy())
@ -1275,11 +1277,11 @@ llvm::ConstantFoldCall(Function *F,
if (Name == "atan2")
return ConstantFoldBinaryFP(atan2, Op1V, Op2V, Ty);
} else if (ConstantInt *Op2C = dyn_cast<ConstantInt>(Operands[1])) {
if (Name == "llvm.powi.f32")
if (F->getIntrinsicID() == Intrinsic::powi && Ty->isFloatTy())
return ConstantFP::get(F->getContext(),
APFloat((float)std::pow((float)Op1V,
(int)Op2C->getZExtValue())));
if (Name == "llvm.powi.f64")
if (F->getIntrinsicID() == Intrinsic::powi && Ty->isDoubleTy())
return ConstantFP::get(F->getContext(),
APFloat((double)std::pow((double)Op1V,
(int)Op2C->getZExtValue())));