本文整理汇总了C++中CodeGenTypes::getDataLayout方法的典型用法代码示例。如果您正苦于以下问题：C++ CodeGenTypes::getDataLayout方法的具体用法？C++ CodeGenTypes::getDataLayout怎么用？C++ CodeGenTypes::getDataLayout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CodeGenTypes的用法示例。
在下文中一共展示了CodeGenTypes::getDataLayout方法的3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: MakeInfo
CGBitFieldInfo CGBitFieldInfo::MakeInfo(CodeGenTypes &Types,
const FieldDecl *FD,
uint64_t Offset, uint64_t Size,
uint64_t StorageSize,
uint64_t StorageAlignment) {
llvm::Type *Ty = Types.ConvertTypeForMem(FD->getType());
CharUnits TypeSizeInBytes =
CharUnits::fromQuantity(Types.getDataLayout().getTypeAllocSize(Ty));
uint64_t TypeSizeInBits = Types.getContext().toBits(TypeSizeInBytes);
bool IsSigned = FD->getType()->isSignedIntegerOrEnumerationType();
if (Size > TypeSizeInBits) {
// We have a wide bit-field. The extra bits are only used for padding, so
// if we have a bitfield of type T, with size N:
//
// T t : N;
//
// We can just assume that it's:
//
// T t : sizeof(T);
//
Size = TypeSizeInBits;
}
// Reverse the bit offsets for big endian machines. Because we represent
// a bitfield as a single large integer load, we can imagine the bits
// counting from the most-significant-bit instead of the
// least-significant-bit.
if (Types.getDataLayout().isBigEndian()) {
Offset = StorageSize - (Offset + Size);
}
return CGBitFieldInfo(Offset, Size, IsSigned, StorageSize, StorageAlignment);
}示例2: Types
CGRecordLowering::CGRecordLowering(CodeGenTypes &Types, const RecordDecl *D,
bool Packed)
: Types(Types), Context(Types.getContext()), D(D),
RD(dyn_cast<CXXRecordDecl>(D)),
Layout(Types.getContext().getASTRecordLayout(D)),
DataLayout(Types.getDataLayout()), IsZeroInitializable(true),
IsZeroInitializableAsBase(true), Packed(Packed) {}示例3: MakeInfo
CGBitFieldInfo CGBitFieldInfo::MakeInfo(CodeGenTypes &Types,
const FieldDecl *FD,
uint64_t Offset, uint64_t Size,
uint64_t StorageSize,
CharUnits StorageOffset) {
// This function is vestigial from CGRecordLayoutBuilder days but is still
// used in GCObjCRuntime.cpp. That usage has a "fixme" attached to it that
// when addressed will allow for the removal of this function.
llvm::Type *Ty = Types.ConvertTypeForMem(FD->getType());
CharUnits TypeSizeInBytes =
CharUnits::fromQuantity(Types.getDataLayout().getTypeAllocSize(Ty));
uint64_t TypeSizeInBits = Types.getContext().toBits(TypeSizeInBytes);
bool IsSigned = FD->getType()->isSignedIntegerOrEnumerationType();
if (Size > TypeSizeInBits) {
// We have a wide bit-field. The extra bits are only used for padding, so
// if we have a bitfield of type T, with size N:
//
// T t : N;
//
// We can just assume that it's:
//
// T t : sizeof(T);
//
Size = TypeSizeInBits;
}
// Reverse the bit offsets for big endian machines. Because we represent
// a bitfield as a single large integer load, we can imagine the bits
// counting from the most-significant-bit instead of the
// least-significant-bit.
if (Types.getDataLayout().isBigEndian()) {
Offset = StorageSize - (Offset + Size);
}
return CGBitFieldInfo(Offset, Size, IsSigned, StorageSize, StorageOffset);
}