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use the new ConstantFP::get method to make this work with

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long double and simplify the code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49435 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-04-09 17:17:35 +00:00
parent d6d48c4e5b
commit 8bb9a4f28f
1 changed files with 4 additions and 11 deletions
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15
lib/Transforms/IPO/SimplifyLibCalls.cpp
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@ -1149,10 +1149,6 @@ public:
/// @brief Perform the pow optimization.
virtual bool OptimizeCall(CallInst *CI, SimplifyLibCalls &SLC) {
const Type *Ty = CI->getType();
if (Ty != Type::FloatTy && Ty != Type::DoubleTy)
return false; // FIXME long double not yet supported
Value *Op1 = CI->getOperand(1);
Value *Op2 = CI->getOperand(2);
if (ConstantFP *Op1C = dyn_cast<ConstantFP>(Op1)) {
@ -1165,8 +1161,7 @@ public:
if (Op2C->getValueAPF().isZero()) {
// pow(x, 0.0) -> 1.0
return ReplaceCallWith(CI, ConstantFP::get(Ty,
Ty==Type::FloatTy ? APFloat(1.0f) : APFloat(1.0)));
return ReplaceCallWith(CI, ConstantFP::get(CI->getType(), 1.0));
} else if (Op2C->isExactlyValue(0.5)) {
// pow(x, 0.5) -> sqrt(x)
Value *Sqrt = CallInst::Create(SLC.get_sqrt(), Op1, "sqrt", CI);
@ -1180,11 +1175,9 @@ public:
return ReplaceCallWith(CI, Sq);
} else if (Op2C->isExactlyValue(-1.0)) {
// pow(x, -1.0) -> 1.0/x
Value *div_inst =
BinaryOperator::createFDiv(ConstantFP::get(Ty,
Ty==Type::FloatTy ? APFloat(1.0f) : APFloat(1.0)),
Op1, CI->getName()+".pow", CI);
return ReplaceCallWith(CI, div_inst);
Value *R = BinaryOperator::createFDiv(ConstantFP::get(CI->getType(), 1.0),
Op1, CI->getName()+".pow", CI);
return ReplaceCallWith(CI, R);
}
return false; // opt failed
}