-//===-- llvm/Target/TargetData.h - Data size & alignment routines-*- C++ -*-==//
+//===-- llvm/Target/TargetData.h - Data size & alignment info ---*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This file defines target properties related to datatype size/offset/alignment
// information. It uses lazy annotations to cache information about how
#ifndef LLVM_TARGET_TARGETDATA_H
#define LLVM_TARGET_TARGETDATA_H
-#include "llvm/Annotation.h"
#include "llvm/Pass.h"
#include "Support/DataTypes.h"
#include <vector>
+#include <string>
+
+namespace llvm {
+
class Value;
class Type;
class StructType;
class StructLayout;
class TargetData : public ImmutablePass {
+ bool LittleEndian; // Defaults to false
unsigned char ByteAlignment; // Defaults to 1 bytes
unsigned char ShortAlignment; // Defaults to 2 bytes
unsigned char IntAlignment; // Defaults to 4 bytes
unsigned char FloatAlignment; // Defaults to 4 bytes
unsigned char DoubleAlignment; // Defaults to 8 bytes
unsigned char PointerSize; // Defaults to 8 bytes
- unsigned char IntegerRegSize; // Defaults to PointerSize = 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 std::string &TargetName = "SparcV9",
- unsigned char IntRegSize = 8,
+ TargetData(const std::string &TargetName = "",
+ bool LittleEndian = false,
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);
+
+ // Copy constructor
+ TargetData (const TargetData &TD) :
+ ImmutablePass (),
+ LittleEndian (TD.isLittleEndian ()),
+ ByteAlignment (TD.getByteAlignment ()),
+ ShortAlignment (TD.getShortAlignment ()),
+ IntAlignment (TD.getIntAlignment ()),
+ LongAlignment (TD.getLongAlignment ()),
+ FloatAlignment (TD.getFloatAlignment ()),
+ DoubleAlignment (TD.getDoubleAlignment ()),
+ PointerSize (TD.getPointerSize ()),
+ PointerAlignment (TD.getPointerAlignment ()) {
+ }
+
+ TargetData(const std::string &ToolName, const Module *M);
~TargetData(); // Not virtual, do not subclass this class
+ /// Target endianness...
+ bool isLittleEndian() const { return LittleEndian; }
+ bool isBigEndian() const { return !LittleEndian; }
+
+ /// Target alignment constraints
unsigned char getByteAlignment() const { return ByteAlignment; }
unsigned char getShortAlignment() const { return ShortAlignment; }
unsigned char getIntAlignment() const { return IntAlignment; }
unsigned char getFloatAlignment() const { return FloatAlignment; }
unsigned char getDoubleAlignment() const { return DoubleAlignment; }
unsigned char getPointerAlignment() const { return PointerAlignment; }
- unsigned char getPointerSize() const { return PointerSize; }
- unsigned char getIntegerRegize() const { return IntegerRegSize; }
- AnnotationID getStructLayoutAID() const { return AID; }
+ unsigned char getPointerSize() const { return PointerSize; }
- // getTypeSize - Return the number of bytes neccesary to hold the specified
- // type
- uint64_t getTypeSize (const Type *Ty) const;
+ /// getTypeSize - Return the number of bytes necessary to hold the specified
+ /// type
+ uint64_t getTypeSize(const Type *Ty) const;
- // getTypeAlignment - Return the minimum required alignment for the specified
- // type
+ /// 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.
- //
- uint64_t getIndexedOffset(const Type *Ty,
- const std::vector<Value*> &Indices) const;
+ /// getIntPtrType - Return an unsigned integer type that is the same size or
+ /// greater to the host pointer size.
+ const Type *getIntPtrType() const;
+
+ /// getIndexOffset - return the offset from the beginning of the type for the
+ /// specified indices. This is used to implement getelementptr.
+ ///
+ uint64_t getIndexedOffset(const Type *Ty,
+ const std::vector<Value*> &Indices) const;
- inline const StructLayout *getStructLayout(const StructType *Ty) const {
- return (const StructLayout*)
- ((const Annotable*)Ty)->getOrCreateAnnotation(AID);
- }
+ const StructLayout *getStructLayout(const StructType *Ty) const;
};
-// This annotation (attached ONLY to StructType classes) is used to lazily
-// calculate structure layout information for a target machine, based on the
-// TargetData structure.
+// This object is used to lazily calculate structure layout information for a
+// target machine, based on the TargetData structure.
//
-struct StructLayout : public Annotation {
+struct StructLayout {
std::vector<uint64_t> MemberOffsets;
uint64_t StructSize;
unsigned StructAlignment;
private:
friend class TargetData; // Only TargetData can create this class
- inline StructLayout(const StructType *ST, const TargetData &TD);
+ StructLayout(const StructType *ST, const TargetData &TD);
};
+} // End llvm namespace
+
#endif