-//===-- llvm/Target/Data.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
+// 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
#ifndef LLVM_TARGET_TARGETDATA_H
#define LLVM_TARGET_TARGETDATA_H
-#include "llvm/Type.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/DataTypes.h"
+#include <vector>
+#include <string>
+
+namespace llvm {
+class Value;
+class Type;
class StructType;
class StructLayout;
-class TargetData {
- unsigned char ByteAlignment; // Defaults to 1 bytes
+class TargetData : public ImmutablePass {
+ bool LittleEndian; // Defaults to false
+ unsigned char BoolAlignment; // Defaults to 1 byte
+ unsigned char ByteAlignment; // Defaults to 1 byte
unsigned char ShortAlignment; // Defaults to 2 bytes
unsigned char IntAlignment; // Defaults to 4 bytes
unsigned char LongAlignment; // Defaults to 8 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(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, unsigned char BoolAl = 1);
+
+ // Copy constructor
+ TargetData (const TargetData &TD) :
+ ImmutablePass(),
+ LittleEndian(TD.isLittleEndian()),
+ BoolAlignment(TD.getBoolAlignment()),
+ 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
- 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
+ /// Target endianness...
+ bool isLittleEndian() const { return LittleEndian; }
+ bool isBigEndian() const { return !LittleEndian; }
+
+ /// Target alignment constraints
+ unsigned char getBoolAlignment() const { return BoolAlignment; }
+ 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; }
+ unsigned char getPointerSizeInBits() const { return 8*PointerSize; }
+
+ /// 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.
+ ///
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;
+ /// getTypeAlignmentShift - Return the minimum required alignment for the
+ /// specified type, returned as log2 of the value (a shift amount).
+ ///
+ unsigned char getTypeAlignmentShift(const Type *Ty) const;
- inline const StructLayout *getStructLayout(const StructType *Ty) const {
- return (const StructLayout*)((const Type*)Ty)->getOrCreateAnnotation(AID);
- }
+ /// 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;
+
+ 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.
-//
-struct StructLayout : public Annotation {
- vector<unsigned> MemberOffsets;
- unsigned StructSize;
+/// StructLayout - used to lazily calculate structure layout information for a
+/// target machine, based on the TargetData structure.
+///
+class StructLayout {
+public:
+ std::vector<uint64_t> MemberOffsets;
+ uint64_t StructSize;
unsigned StructAlignment;
+
+ /// getElementContainingOffset - Given a valid offset into the structure,
+ /// return the structure index that contains it.
+ ///
+ unsigned getElementContainingOffset(uint64_t Offset) const;
+
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