本文整理汇总了C++中IntrinsicInst::removeFromParent方法的典型用法代码示例。如果您正苦于以下问题：C++ IntrinsicInst::removeFromParent方法的具体用法？C++ IntrinsicInst::removeFromParent怎么用？C++ IntrinsicInst::removeFromParent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::removeFromParent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: runOnBasicBlock
bool IntrinsicCleanerPass::runOnBasicBlock(BasicBlock &b, Module &M) {
bool dirty = false;
bool block_split=false;
#if LLVM_VERSION_CODE <= LLVM_VERSION(3, 1)
unsigned WordSize = TargetData.getPointerSizeInBits() / 8;
#else
unsigned WordSize = DataLayout.getPointerSizeInBits() / 8;
#endif
for (BasicBlock::iterator i = b.begin(), ie = b.end();
(i != ie) && (block_split == false);) {
IntrinsicInst *ii = dyn_cast<IntrinsicInst>(&*i);
// increment now since LowerIntrinsic deletion makes iterator invalid.
++i;
if(ii) {
switch (ii->getIntrinsicID()) {
case Intrinsic::vastart:
case Intrinsic::vaend:
break;
// Lower vacopy so that object resolution etc is handled by
// normal instructions.
//
// FIXME: This is much more target dependent than just the word size,
// however this works for x86-32 and x86-64.
case Intrinsic::vacopy: { // (dst, src) -> *((i8**) dst) = *((i8**) src)
Value *dst = ii->getArgOperand(0);
Value *src = ii->getArgOperand(1);
if (WordSize == 4) {
Type *i8pp = PointerType::getUnqual(PointerType::getUnqual(Type::getInt8Ty(getGlobalContext())));
Value *castedDst = CastInst::CreatePointerCast(dst, i8pp, "vacopy.cast.dst", ii);
Value *castedSrc = CastInst::CreatePointerCast(src, i8pp, "vacopy.cast.src", ii);
Value *load = new LoadInst(castedSrc, "vacopy.read", ii);
new StoreInst(load, castedDst, false, ii);
} else {
assert(WordSize == 8 && "Invalid word size!");
Type *i64p = PointerType::getUnqual(Type::getInt64Ty(getGlobalContext()));
Value *pDst = CastInst::CreatePointerCast(dst, i64p, "vacopy.cast.dst", ii);
Value *pSrc = CastInst::CreatePointerCast(src, i64p, "vacopy.cast.src", ii);
Value *val = new LoadInst(pSrc, std::string(), ii); new StoreInst(val, pDst, ii);
Value *off = ConstantInt::get(Type::getInt64Ty(getGlobalContext()), 1);
pDst = GetElementPtrInst::Create(pDst, off, std::string(), ii);
pSrc = GetElementPtrInst::Create(pSrc, off, std::string(), ii);
val = new LoadInst(pSrc, std::string(), ii); new StoreInst(val, pDst, ii);
pDst = GetElementPtrInst::Create(pDst, off, std::string(), ii);
pSrc = GetElementPtrInst::Create(pSrc, off, std::string(), ii);
val = new LoadInst(pSrc, std::string(), ii); new StoreInst(val, pDst, ii);
}
ii->removeFromParent();
delete ii;
break;
}
case Intrinsic::sadd_with_overflow:
case Intrinsic::ssub_with_overflow:
case Intrinsic::smul_with_overflow:
case Intrinsic::uadd_with_overflow:
case Intrinsic::usub_with_overflow:
case Intrinsic::umul_with_overflow: {
IRBuilder<> builder(ii->getParent(), ii);
Value *op1 = ii->getArgOperand(0);
Value *op2 = ii->getArgOperand(1);
Value *result = 0;
Value *result_ext = 0;
Value *overflow = 0;
unsigned int bw = op1->getType()->getPrimitiveSizeInBits();
unsigned int bw2 = op1->getType()->getPrimitiveSizeInBits()*2;
if ((ii->getIntrinsicID() == Intrinsic::uadd_with_overflow) ||
(ii->getIntrinsicID() == Intrinsic::usub_with_overflow) ||
(ii->getIntrinsicID() == Intrinsic::umul_with_overflow)) {
Value *op1ext =
builder.CreateZExt(op1, IntegerType::get(M.getContext(), bw2));
Value *op2ext =
builder.CreateZExt(op2, IntegerType::get(M.getContext(), bw2));
Value *int_max_s =
ConstantInt::get(op1->getType(), APInt::getMaxValue(bw));
Value *int_max =
builder.CreateZExt(int_max_s, IntegerType::get(M.getContext(), bw2));
if (ii->getIntrinsicID() == Intrinsic::uadd_with_overflow){
result_ext = builder.CreateAdd(op1ext, op2ext);
} else if (ii->getIntrinsicID() == Intrinsic::usub_with_overflow){
result_ext = builder.CreateSub(op1ext, op2ext);
} else if (ii->getIntrinsicID() == Intrinsic::umul_with_overflow){
result_ext = builder.CreateMul(op1ext, op2ext);
}
overflow = builder.CreateICmpUGT(result_ext, int_max);
} else if ((ii->getIntrinsicID() == Intrinsic::sadd_with_overflow) ||
(ii->getIntrinsicID() == Intrinsic::ssub_with_overflow) ||
(ii->getIntrinsicID() == Intrinsic::smul_with_overflow)) {
Value *op1ext =
builder.CreateSExt(op1, IntegerType::get(M.getContext(), bw2));
//.........这里部分代码省略.........