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Constant fold llvm.powi.*. This speeds up tramp3d--v4 by 9.5%

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llvm-svn: 33229
This commit is contained in:
Chris Lattner 2007-01-15 06:27:37 +00:00
parent 851b9e93a2
commit 64205203a5
1 changed files with 12 additions and 1 deletions
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13
lib/Analysis/ConstantFolding.cpp
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@ -40,6 +40,8 @@ llvm::canConstantFoldCallTo(Function *F) {
case Intrinsic::bswap_i16:
case Intrinsic::bswap_i32:
case Intrinsic::bswap_i64:
case Intrinsic::powi_f32:
case Intrinsic::powi_f64:
// FIXME: these should be constant folded as well
//case Intrinsic::ctpop_i8:
//case Intrinsic::ctpop_i16:
@ -186,8 +188,17 @@ llvm::ConstantFoldCall(Function *F, const std::vector<Constant*> &Operands) {
double V = fmod(Op1V, Op2V);
if (errno == 0)
return ConstantFP::get(Ty, V);
} else if (Name == "atan2")
} else if (Name == "atan2") {
return ConstantFP::get(Ty, atan2(Op1V,Op2V));
}
} else if (ConstantInt *Op2C = dyn_cast<ConstantInt>(Operands[1])) {
if (Name == "llvm.powi.f32") {
return ConstantFP::get(Ty, std::pow((float)Op1V,
(int)Op2C->getZExtValue()));
} else if (Name == "llvm.powi.f64") {
return ConstantFP::get(Ty, std::pow((double)Op1V,
(int)Op2C->getZExtValue()));
}
}
}
}