本文整理汇总了C++中GetElementPtrInst::getNameStr方法的典型用法代码示例。如果您正苦于以下问题：C++ GetElementPtrInst::getNameStr方法的具体用法？C++ GetElementPtrInst::getNameStr怎么用？C++ GetElementPtrInst::getNameStr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GetElementPtrInst的用法示例。
在下文中一共展示了GetElementPtrInst::getNameStr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: while
bool Aa::LowerGepPass::runOnFunction(Function &F)
{
const llvm::Type *ptr_int_type = TD->getIntPtrType(F.getContext());
for (Function::iterator bi = F.begin(), be = F.end(); bi != be; ++bi) {
BasicBlock *bb = bi;
BasicBlock::iterator ii = bb->begin();
while (ii != bb->end()) {
GetElementPtrInst *gep = dyn_cast<GetElementPtrInst>(ii);
BasicBlock::iterator gi = ii++;
if (!gep) {
continue;
}
for (llvm::Value::use_iterator ui = gep->use_begin(), ue = gep->use_end();
ui != ue; ++ui) {
Use &u = ui.getUse();
IOCode ioc = get_io_code(u);
if (ioc == NOT_IO)
continue;
u.set(CastInst::CreatePointerCast(gep->getPointerOperand()
, gep->getType()
, "", gep));
}
assert(gep->hasIndices() && "GEP without indices??");
llvm::Value *ptr = gep->getPointerOperand();
const Type *ctype = ptr->getType();
// deal with the base pointer first
llvm::Value *base = gep->getPointerOperand();
std::string base_name = gep->getNameStr() + ".base";
llvm::Value *address = new PtrToIntInst(base, ptr_int_type, base_name + ".cast", gi);
unsigned i = 0;
for (User::op_iterator oi = gep->idx_begin(), oe = gep->idx_end();
oi != oe; ++oi, ++i) {
llvm::Value *index = *oi;
llvm::Value *offset = NULL;
std::stringstream index_name;
index_name << gep->getNameStr() << ".idx." << i;
if (const SequentialType *qtype = dyn_cast<SequentialType>(ctype)) {
// multiply index by size of element
unsigned element_size = getTypePaddedSize(TD, qtype->getElementType());
const llvm::IntegerType *index_type = cast<IntegerType>(index->getType());
ConstantInt *cint = ConstantInt::get(index_type, element_size);
assert(cint && "uh oh!");
offset = BinaryOperator::Create(Instruction::Mul
, cint
, index
, index_name.str()
, gi);
ctype = qtype->getElementType();
} else if (const StructType *stype = dyn_cast<StructType>(ctype)) {
// calculate offset into the struct
const StructLayout *layout = TD->getStructLayout(stype);
unsigned idx = cast<ConstantInt>(index)->getValue().getZExtValue();
unsigned struct_offset = layout->getElementOffset(idx);
offset = ConstantInt::get(ptr_int_type, struct_offset);
ctype = stype->getElementType(idx);
} else
assert(false && "unhandled offset into composite type");
// add offset to the address
assert(address && "uh oh!");
std::stringstream add_name;
add_name << gep->getNameStr() << ".lvl." << i;
if (offset->getType() != address->getType()) {
offset = CastInst::CreateIntegerCast(offset, address->getType()
, false, offset->getName() + ".resized"
, gi);
}
address = BinaryOperator::Create(Instruction::Add
, address, offset
, add_name.str(), gi);
}
if (address->getType() != ptr_int_type)
address = CastInst::CreateIntegerCast(address, ptr_int_type
, false, address->getName() + ".final", gi);
Instruction *new_ptr = new IntToPtrInst(address, gep->getType()
, gep->getName() + ".cast");
ReplaceInstWithInst(bb->getInstList(), gi, new_ptr);
}
}
return true;
}