本文整理汇总了C++中IntrinsicInst::clone方法的典型用法代码示例。如果您正苦于以下问题：C++ IntrinsicInst::clone方法的具体用法？C++ IntrinsicInst::clone怎么用？C++ IntrinsicInst::clone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IntrinsicInst的用法示例。
在下文中一共展示了IntrinsicInst::clone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: instrumentVarArgFunction
void MemoryInstrumenter::instrumentVarArgFunction(Function *F) {
IntrinsicInst *VAStart = findAnyVAStart(F);
assert(VAStart && "cannot find any llvm.va_start");
BitCastInst *ArrayDecay = cast<BitCastInst>(VAStart->getOperand(0));
assert(ArrayDecay->getType() == CharStarType);
// The source of the bitcast does not have to be an alloca. In unoptimized
// bitcode, it's likely a GEP. In that case, we need track further.
Instruction *Alloca = ArrayDecay;
while (!isa<AllocaInst>(Alloca)) {
Alloca = cast<Instruction>(Alloca->getOperand(0));
}
// Clone Alloca, ArrayDecay, and VAStart, and replace their operands.
Instruction *ClonedAlloca = Alloca->clone();
Instruction *ClonedArrayDecay = ArrayDecay->clone();
Instruction *ClonedVAStart = VAStart->clone();
ClonedArrayDecay->setOperand(0, ClonedAlloca);
ClonedVAStart->setOperand(0, ClonedArrayDecay);
// Insert the cloned instructions to the entry block.
BasicBlock::iterator InsertPos = F->begin()->begin();
BasicBlock::InstListType &InstList = F->begin()->getInstList();
InstList.insert(InsertPos, ClonedAlloca);
InstList.insert(InsertPos, ClonedArrayDecay);
InstList.insert(InsertPos, ClonedVAStart);
// Hook the llvm.va_start.
CallInst::Create(VAStartHook, ClonedArrayDecay, "", InsertPos);
}