llvm-6502/include/llvm/Target/TargetMachine.h
Chris Lattner 2bed9ecc4b Add a new constructor
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12087 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-03 02:12:47 +00:00

125 lines
4.7 KiB
C++

//===-- llvm/Target/TargetMachine.h - Target Information --------*- 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 describes the general parts of a Target machine.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_TARGETMACHINE_H
#define LLVM_TARGET_TARGETMACHINE_H
#include "llvm/Target/TargetData.h"
#include <cassert>
namespace llvm {
class TargetInstrInfo;
class TargetInstrDescriptor;
class TargetJITInfo;
class TargetSchedInfo;
class TargetRegInfo;
class TargetFrameInfo;
class MachineCodeEmitter;
class MRegisterInfo;
class FunctionPassManager;
class PassManager;
class Pass;
class IntrinsicLowering;
//===----------------------------------------------------------------------===//
///
/// TargetMachine - Primary interface to the complete machine description for
/// the target machine. All target-specific information should be accessible
/// through this interface.
///
class TargetMachine {
const std::string Name;
const TargetData DataLayout; // Calculates type size & alignment
IntrinsicLowering *IL; // Specifies how to lower intrinsic calls
TargetMachine(const TargetMachine&); // DO NOT IMPLEMENT
void operator=(const TargetMachine&); // DO NOT IMPLEMENT
protected: // Can only create subclasses...
TargetMachine(const std::string &name, IntrinsicLowering *IL,
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);
// This constructor is used for targets that support arbitrary TargetData
// layouts, like the C backend. It initializes the TargetData to match that
// of the specified module.
TargetMachine(const std::string &name, IntrinsicLowering *IL,
const Module &M);
public:
virtual ~TargetMachine();
const std::string &getName() const { return Name; }
// getIntrinsicLowering - This method returns a reference to an
// IntrinsicLowering instance which should be used by the code generator to
// lower unknown intrinsic functions to the equivalent LLVM expansion.
IntrinsicLowering &getIntrinsicLowering() const { return *IL; }
// Interfaces to the major aspects of target machine information:
// -- Instruction opcode and operand information
// -- Pipelines and scheduling information
// -- Register information
// -- Stack frame information
// -- Cache hierarchy information
// -- Machine-level optimization information (peephole only)
//
virtual const TargetInstrInfo& getInstrInfo() const = 0;
virtual const TargetSchedInfo& getSchedInfo() const = 0;
virtual const TargetRegInfo& getRegInfo() const = 0;
virtual const TargetFrameInfo& getFrameInfo() const = 0;
const TargetData &getTargetData() const { return DataLayout; }
/// getRegisterInfo - If register information is available, return it. If
/// not, return null. This is kept separate from RegInfo until RegInfo has
/// details of graph coloring register allocation removed from it.
///
virtual const MRegisterInfo* getRegisterInfo() const { return 0; }
/// getJITInfo - If this target supports a JIT, return information for it,
/// otherwise return null.
///
virtual TargetJITInfo *getJITInfo() { return 0; }
// Data storage information. FIXME, this should be moved out to sparc
// specific code.
//
virtual unsigned findOptimalStorageSize(const Type* ty) const;
/// addPassesToEmitAssembly - Add passes to the specified pass manager to get
/// assembly langage code emitted. Typically this will involve several steps
/// of code generation. This method should return true if assembly emission
/// is not supported.
///
virtual bool addPassesToEmitAssembly(PassManager &PM, std::ostream &Out) {
return true;
}
/// addPassesToEmitMachineCode - Add passes to the specified pass manager to
/// get machine code emitted. This uses a MachineCodeEmitter object to handle
/// actually outputting the machine code and resolving things like the address
/// of functions. This method should returns true if machine code emission is
/// not supported.
///
virtual bool addPassesToEmitMachineCode(FunctionPassManager &PM,
MachineCodeEmitter &MCE) {
return true;
}
};
} // End llvm namespace
#endif