本文整理汇总了C++中DSNode::checkOffsetFoldIfNeeded方法的典型用法代码示例。如果您正苦于以下问题：C++ DSNode::checkOffsetFoldIfNeeded方法的具体用法？C++ DSNode::checkOffsetFoldIfNeeded怎么用？C++ DSNode::checkOffsetFoldIfNeeded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DSNode的用法示例。
在下文中一共展示了DSNode::checkOffsetFoldIfNeeded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: visitGetElementPtrInst
//.........这里部分代码省略.........
Value.getNode()->growSize(requiredSize);
}
Offset += (unsigned)TD.getStructLayout(STy)->getElementOffset(FieldNo);
if(TypeInferenceOptimize) {
if(ArrayType* AT = dyn_cast<ArrayType>(STy->getTypeAtIndex(FieldNo))) {
Value.getNode()->mergeTypeInfo(AT, Value.getOffset() + Offset);
if((++I) == E) {
break;
}
// Check if we are still indexing into an array.
// We only record the topmost array type of any nested array.
// Keep skipping indexes till we reach a non-array type.
// J is the type of the next index.
// Uncomment the line below to get all the nested types.
gep_type_iterator J = I;
while(isa<ArrayType>(*(++J))) {
// Value.getNode()->mergeTypeInfo(AT1, Value.getOffset() + Offset);
if((++I) == E) {
break;
}
J = I;
}
if((I) == E) {
break;
}
}
}
} else if(ArrayType *ATy = dyn_cast<ArrayType>(*I)) {
// indexing into an array.
Value.getNode()->setArrayMarker();
Type *CurTy = ATy->getElementType();
if(!isa<ArrayType>(CurTy) &&
Value.getNode()->getSize() <= 0) {
Value.getNode()->growSize(TD.getTypeAllocSize(CurTy));
} else if(isa<ArrayType>(CurTy) && Value.getNode()->getSize() <= 0){
Type *ETy = (cast<ArrayType>(CurTy))->getElementType();
while(isa<ArrayType>(ETy)) {
ETy = (cast<ArrayType>(ETy))->getElementType();
}
Value.getNode()->growSize(TD.getTypeAllocSize(ETy));
}
// Find if the DSNode belongs to the array
// If not fold.
if((Value.getOffset() || Offset != 0)
|| (!isa<ArrayType>(CurTy)
&& (Value.getNode()->getSize() != TD.getTypeAllocSize(CurTy)))) {
Value.getNode()->foldNodeCompletely();
Value.getNode();
Offset = 0;
break;
}
} else if (const PointerType *PtrTy = dyn_cast<PointerType>(*I)) {
Type *CurTy = PtrTy->getElementType();
//
// Unless we're advancing the pointer by zero bytes via array indexing,
// fold the node (i.e., mark it type-unknown) and indicate that we're
// indexing zero bytes into the object.
//
// Note that we break out of the loop if we fold the node. Once
// something is folded, all values within it are considered to alias.
//
if (!isa<Constant>(I.getOperand()) ||
!cast<Constant>(I.getOperand())->isNullValue()) {
Value.getNode()->setArrayMarker();
if(!isa<ArrayType>(CurTy) && Value.getNode()->getSize() <= 0){
Value.getNode()->growSize(TD.getTypeAllocSize(CurTy));
} else if(isa<ArrayType>(CurTy) && Value.getNode()->getSize() <= 0){
Type *ETy = (cast<ArrayType>(CurTy))->getElementType();
while(isa<ArrayType>(ETy)) {
ETy = (cast<ArrayType>(ETy))->getElementType();
}
Value.getNode()->growSize(TD.getTypeAllocSize(ETy));
}
if(Value.getOffset() || Offset != 0
|| (!isa<ArrayType>(CurTy)
&& (Value.getNode()->getSize() != TD.getTypeAllocSize(CurTy)))) {
Value.getNode()->foldNodeCompletely();
Value.getNode();
Offset = 0;
break;
}
}
}
// Add in the offset calculated...
Value.setOffset(Value.getOffset()+Offset);
// Check the offset
DSNode *N = Value.getNode();
if (N) N->checkOffsetFoldIfNeeded(Value.getOffset());
// Value is now the pointer we want to GEP to be...
setDestTo(GEP, Value);
}