本文整理汇总了C++中BinaryOperator::getIterator方法的典型用法代码示例。如果您正苦于以下问题：C++ BinaryOperator::getIterator方法的具体用法？C++ BinaryOperator::getIterator怎么用？C++ BinaryOperator::getIterator使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BinaryOperator的用法示例。
在下文中一共展示了BinaryOperator::getIterator方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: visitFDiv
// Insert an intrinsic for fast fdiv for safe math situations where we can
// reduce precision. Leave fdiv for situations where the generic node is
// expected to be optimized.
bool AMDGPUCodeGenPrepare::visitFDiv(BinaryOperator &FDiv) {
Type *Ty = FDiv.getType();
// TODO: Handle half
if (!Ty->getScalarType()->isFloatTy())
return false;
MDNode *FPMath = FDiv.getMetadata(LLVMContext::MD_fpmath);
if (!FPMath)
return false;
const FPMathOperator *FPOp = cast<const FPMathOperator>(&FDiv);
float ULP = FPOp->getFPAccuracy();
if (ULP < 2.5f)
return false;
FastMathFlags FMF = FPOp->getFastMathFlags();
bool UnsafeDiv = HasUnsafeFPMath || FMF.unsafeAlgebra() ||
FMF.allowReciprocal();
if (ST->hasFP32Denormals() && !UnsafeDiv)
return false;
IRBuilder<> Builder(FDiv.getParent(), std::next(FDiv.getIterator()), FPMath);
Builder.setFastMathFlags(FMF);
Builder.SetCurrentDebugLocation(FDiv.getDebugLoc());
const AMDGPUIntrinsicInfo *II = TM->getIntrinsicInfo();
Function *Decl
= II->getDeclaration(Mod, AMDGPUIntrinsic::amdgcn_fdiv_fast, {});
Value *Num = FDiv.getOperand(0);
Value *Den = FDiv.getOperand(1);
Value *NewFDiv = nullptr;
if (VectorType *VT = dyn_cast<VectorType>(Ty)) {
NewFDiv = UndefValue::get(VT);
// FIXME: Doesn't do the right thing for cases where the vector is partially
// constant. This works when the scalarizer pass is run first.
for (unsigned I = 0, E = VT->getNumElements(); I != E; ++I) {
Value *NumEltI = Builder.CreateExtractElement(Num, I);
Value *DenEltI = Builder.CreateExtractElement(Den, I);
Value *NewElt;
if (shouldKeepFDivF32(NumEltI, UnsafeDiv)) {
NewElt = Builder.CreateFDiv(NumEltI, DenEltI);
} else {
NewElt = Builder.CreateCall(Decl, { NumEltI, DenEltI });
}
NewFDiv = Builder.CreateInsertElement(NewFDiv, NewElt, I);
}
} else {
if (!shouldKeepFDivF32(Num, UnsafeDiv))
NewFDiv = Builder.CreateCall(Decl, { Num, Den });
}
if (NewFDiv) {
FDiv.replaceAllUsesWith(NewFDiv);
NewFDiv->takeName(&FDiv);
FDiv.eraseFromParent();
}
return true;
}