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use the new ConstantFP::get method to make this work with
long double and simplify the code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49435 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1149,10 +1149,6 @@ public:
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/// @brief Perform the pow optimization.
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virtual bool OptimizeCall(CallInst *CI, SimplifyLibCalls &SLC) {
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const Type *Ty = CI->getType();
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if (Ty != Type::FloatTy && Ty != Type::DoubleTy)
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return false; // FIXME long double not yet supported
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Value *Op1 = CI->getOperand(1);
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Value *Op2 = CI->getOperand(2);
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if (ConstantFP *Op1C = dyn_cast<ConstantFP>(Op1)) {
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@ -1165,8 +1161,7 @@ public:
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if (Op2C->getValueAPF().isZero()) {
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// pow(x, 0.0) -> 1.0
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return ReplaceCallWith(CI, ConstantFP::get(Ty,
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Ty==Type::FloatTy ? APFloat(1.0f) : APFloat(1.0)));
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return ReplaceCallWith(CI, ConstantFP::get(CI->getType(), 1.0));
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} else if (Op2C->isExactlyValue(0.5)) {
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// pow(x, 0.5) -> sqrt(x)
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Value *Sqrt = CallInst::Create(SLC.get_sqrt(), Op1, "sqrt", CI);
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@ -1180,11 +1175,9 @@ public:
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return ReplaceCallWith(CI, Sq);
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} else if (Op2C->isExactlyValue(-1.0)) {
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// pow(x, -1.0) -> 1.0/x
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Value *div_inst =
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BinaryOperator::createFDiv(ConstantFP::get(Ty,
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Ty==Type::FloatTy ? APFloat(1.0f) : APFloat(1.0)),
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Value *R = BinaryOperator::createFDiv(ConstantFP::get(CI->getType(), 1.0),
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Op1, CI->getName()+".pow", CI);
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return ReplaceCallWith(CI, div_inst);
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return ReplaceCallWith(CI, R);
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}
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return false; // opt failed
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}
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