return nullptr;
}
-/// If this is a floating-point extension instruction, look
-/// through it until we get the source value.
+/// Look through floating-point extensions until we get the source value.
static Value *lookThroughFPExtensions(Value *V) {
- if (Instruction *I = dyn_cast<Instruction>(V))
- if (I->getOpcode() == Instruction::FPExt)
- return lookThroughFPExtensions(I->getOperand(0));
+ while (auto *FPExt = dyn_cast<FPExtInst>(V))
+ V = FPExt->getOperand(0);
// If this value is a constant, return the constant in the smallest FP type
// that can accurately represent it. This allows us to turn
// (float)((double)X+2.0) into x+2.0f.
- if (ConstantFP *CFP = dyn_cast<ConstantFP>(V)) {
+ if (auto *CFP = dyn_cast<ConstantFP>(V)) {
if (CFP->getType() == Type::getPPC_FP128Ty(V->getContext()))
return V; // No constant folding of this.
// See if the value can be truncated to half and then reextended.