mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-22 07:32:48 +00:00
fe660397e1
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22542 91177308-0d34-0410-b5e6-96231b3b80d8
116 lines
4.1 KiB
C++
116 lines
4.1 KiB
C++
//===-- llvm/CodeGen/MachineCodeEmitter.h - Code emission -------*- 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 an abstract interface that is used by the machine code
|
|
// emission framework to output the code. This allows machine code emission to
|
|
// be separated from concerns such as resolution of call targets, and where the
|
|
// machine code will be written (memory or disk, f.e.).
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_MACHINECODEEMITTER_H
|
|
#define LLVM_CODEGEN_MACHINECODEEMITTER_H
|
|
|
|
#include "llvm/Support/DataTypes.h"
|
|
|
|
namespace llvm {
|
|
|
|
class MachineBasicBlock;
|
|
class MachineConstantPool;
|
|
class MachineFunction;
|
|
class MachineRelocation;
|
|
class Value;
|
|
class GlobalValue;
|
|
class Function;
|
|
|
|
class MachineCodeEmitter {
|
|
public:
|
|
virtual ~MachineCodeEmitter() {}
|
|
|
|
/// startFunction - This callback is invoked when the specified function is
|
|
/// about to be code generated.
|
|
///
|
|
virtual void startFunction(MachineFunction &F) {}
|
|
|
|
/// finishFunction - This callback is invoked when the specified function has
|
|
/// finished code generation.
|
|
///
|
|
virtual void finishFunction(MachineFunction &F) {}
|
|
|
|
/// emitConstantPool - This callback is invoked to output the constant pool
|
|
/// for the function.
|
|
virtual void emitConstantPool(MachineConstantPool *MCP) {}
|
|
|
|
/// startFunctionStub - This callback is invoked when the JIT needs the
|
|
/// address of a function that has not been code generated yet. The StubSize
|
|
/// specifies the total size required by the stub. Stubs are not allowed to
|
|
/// have constant pools, the can only use the other emit* methods.
|
|
///
|
|
virtual void startFunctionStub(unsigned StubSize) {}
|
|
|
|
/// finishFunctionStub - This callback is invoked to terminate a function
|
|
/// stub.
|
|
///
|
|
virtual void *finishFunctionStub(const Function *F) { return 0; }
|
|
|
|
/// emitByte - This callback is invoked when a byte needs to be written to the
|
|
/// output stream.
|
|
///
|
|
virtual void emitByte(unsigned char B) {}
|
|
|
|
/// emitWordAt - This callback is invoked when a word needs to be written to
|
|
/// the output stream at a different position than the current PC (for
|
|
/// instance, when performing relocations).
|
|
///
|
|
virtual void emitWordAt(unsigned W, unsigned *Ptr) {}
|
|
|
|
/// emitWord - This callback is invoked when a word needs to be written to the
|
|
/// output stream.
|
|
///
|
|
virtual void emitWord(unsigned W) = 0;
|
|
|
|
/// getCurrentPCValue - This returns the address that the next emitted byte
|
|
/// will be output to.
|
|
///
|
|
virtual uint64_t getCurrentPCValue() = 0;
|
|
|
|
|
|
/// getCurrentPCOffset - Return the offset from the start of the emitted
|
|
/// buffer that we are currently writing to.
|
|
virtual uint64_t getCurrentPCOffset() = 0;
|
|
|
|
/// addRelocation - Whenever a relocatable address is needed, it should be
|
|
/// noted with this interface.
|
|
virtual void addRelocation(const MachineRelocation &MR) = 0;
|
|
|
|
// getConstantPoolEntryAddress - Return the address of the 'Index' entry in
|
|
// the constant pool that was last emitted with the 'emitConstantPool' method.
|
|
//
|
|
virtual uint64_t getConstantPoolEntryAddress(unsigned Index) = 0;
|
|
|
|
// allocateGlobal - Allocate some space for a global variable.
|
|
virtual unsigned char* allocateGlobal(unsigned size, unsigned alignment) = 0;
|
|
|
|
/// createDebugEmitter - Return a dynamically allocated machine
|
|
/// code emitter, which just prints the opcodes and fields out the cout. This
|
|
/// can be used for debugging users of the MachineCodeEmitter interface.
|
|
///
|
|
static MachineCodeEmitter *createDebugEmitter();
|
|
|
|
/// createFilePrinterEmitter - Return a dynamically allocated
|
|
/// machine code emitter, which prints binary code to a file. This
|
|
/// can be used for debugging users of the MachineCodeEmitter interface.
|
|
///
|
|
static MachineCodeEmitter *createFilePrinterEmitter(MachineCodeEmitter&);
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|