mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-03 14:21:30 +00:00
a578a6d054
information, including instr, sched, and reg information. Rename files to match the primary classes they provide. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@602 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
3.5 KiB
C++
85 lines
3.5 KiB
C++
//===-- llvm/Target/Data.h - Data size & alignment routines ------*- C++ -*-==//
|
|
//
|
|
// This file defines target properties related to datatype size/offset/alignment
|
|
// information. It uses lazy annotations to cache information about how
|
|
// structure types are laid out and used.
|
|
//
|
|
// This structure should be created once, filled in if the defaults are not
|
|
// correct and then passed around by const&. None of the members functions
|
|
// require modification to the object.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TARGET_TARGETDATA_H
|
|
#define LLVM_TARGET_TARGETDATA_H
|
|
|
|
#include "llvm/Type.h"
|
|
|
|
class StructType;
|
|
class StructLayout;
|
|
|
|
class TargetData {
|
|
unsigned char ByteAlignment; // Defaults to 1 bytes
|
|
unsigned char ShortAlignment; // Defaults to 2 bytes
|
|
unsigned char IntAlignment; // Defaults to 4 bytes
|
|
unsigned char LongAlignment; // Defaults to 8 bytes
|
|
unsigned char FloatAlignment; // Defaults to 4 bytes
|
|
unsigned char DoubleAlignment; // Defaults to 8 bytes
|
|
unsigned char PointerSize; // Defaults to 8 bytes
|
|
unsigned char PointerAlignment; // Defaults to 8 bytes
|
|
AnnotationID AID; // AID for structure layout annotation
|
|
|
|
static Annotation *TypeAnFactory(AnnotationID, const Annotable *, void *);
|
|
public:
|
|
TargetData(const string &TargetName, unsigned char PtrSize = 8,
|
|
unsigned char PtrAl = 8, unsigned char DoubleAl = 8,
|
|
unsigned char FloatAl = 4, unsigned char LongAl = 8,
|
|
unsigned char IntAl = 4, unsigned char ShortAl = 2,
|
|
unsigned char ByteAl = 1);
|
|
~TargetData(); // Not virtual, do not subclass this class
|
|
|
|
unsigned char getByteAlignment() const { return ByteAlignment; }
|
|
unsigned char getShortAlignment() const { return ShortAlignment; }
|
|
unsigned char getIntAlignment() const { return IntAlignment; }
|
|
unsigned char getLongAlignment() const { return LongAlignment; }
|
|
unsigned char getFloatAlignment() const { return FloatAlignment; }
|
|
unsigned char getDoubleAlignment() const { return DoubleAlignment; }
|
|
unsigned char getPointerAlignment() const { return PointerAlignment; }
|
|
unsigned char getPointerSize() const { return PointerSize; }
|
|
AnnotationID getStructLayoutAID() const { return AID; }
|
|
|
|
// getTypeSize - Return the number of bytes neccesary to hold the specified
|
|
// type
|
|
unsigned getTypeSize (const Type *Ty) const;
|
|
|
|
// getTypeAlignment - Return the minimum required alignment for the specified
|
|
// type
|
|
unsigned char getTypeAlignment(const Type *Ty) const;
|
|
|
|
// getIndexOffset - return the offset from the beginning of the type for the
|
|
// specified indices. This is used to implement getElementPtr and load and
|
|
// stores that include the implicit form of getelementptr.
|
|
//
|
|
unsigned getIndexedOffset(const Type *Ty,
|
|
const vector<ConstPoolVal*> &Indices) const;
|
|
|
|
inline const StructLayout *getStructLayout(const StructType *Ty) const {
|
|
return (const StructLayout*)((const Type*)Ty)->getOrCreateAnnotation(AID);
|
|
}
|
|
};
|
|
|
|
// This annotation (attached ONLY to StructType classes) is used to lazily
|
|
// calculate structure layout information for a target machine, based on the
|
|
// TargetData structure.
|
|
//
|
|
struct StructLayout : public Annotation {
|
|
vector<unsigned> MemberOffsets;
|
|
unsigned StructSize;
|
|
unsigned StructAlignment;
|
|
private:
|
|
friend class TargetData; // Only TargetData can create this class
|
|
inline StructLayout(const StructType *ST, const TargetData &TD);
|
|
};
|
|
|
|
#endif
|