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Hack up MachineCodeEmitter to actually be target independent.

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llvm-svn: 6514
This commit is contained in:
Chris Lattner 2003-06-01 23:20:02 +00:00
parent 495826a0e5
commit d94534c537
1 changed files with 34 additions and 35 deletions
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69
include/llvm/CodeGen/MachineCodeEmitter.h
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@ -10,10 +10,8 @@
#ifndef LLVM_CODEGEN_MACHINE_CODE_EMITTER_H
#define LLVM_CODEGEN_MACHINE_CODE_EMITTER_H
#include <iostream>
#include <string>
class BasicBlock;
class MachineInstr;
#include "Support/DataTypes.h"
class MachineFunction;
class MachineBasicBlock;
class MachineConstantPool;
@ -38,11 +36,6 @@ struct MachineCodeEmitter {
/// for the function.
virtual void emitConstantPool(MachineConstantPool *MCP) {}
/// startBasicBlock - This callback is invoked when a new basic block is about
/// to be emitted.
///
virtual void startBasicBlock(MachineBasicBlock &BB) {}
/// 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
@ -60,45 +53,51 @@ struct MachineCodeEmitter {
///
virtual void emitByte(unsigned char B) {}
/// emitPCRelativeDisp - This callback is invoked when we need to write out a
/// PC relative displacement for the specified Value*. This is used for call
/// and jump instructions typically.
/// emitWord - This callback is invoked when a word needs to be written to the
/// output stream.
///
virtual void emitPCRelativeDisp(Value *V) {}
virtual void emitWord(unsigned W) = 0;
/// emitGlobalAddress - This callback is invoked when we need to write out the
/// address of a global value to machine code. This is important for indirect
/// calls as well as accessing global variables.
/// getGlobalValueAddress - This method is used to get the address of the
/// specified global value. In some cases, however, the address may not yet
/// be known at the point that the method is called (for example, getting the
/// address of a function which has not yet been code generated). If this is
/// the case, the function returns zero, and the callee has to be able to
/// handle the situation.
///
virtual void emitGlobalAddress(GlobalValue *V, bool isPCRelative) {}
virtual void emitGlobalAddress(const std::string &Name, bool isPCRelative) {}
virtual uint64_t getGlobalValueAddress(GlobalValue *V) = 0;
virtual uint64_t getGlobalValueAddress(const std::string &Name) = 0;
/// emitFunctionConstantValueAddress - This callback is invoked when the
/// address of a constant, which was spilled to memory, needs to be addressed.
/// This is used for constants which cannot be directly specified as operands
/// to instructions, such as large integer values on the sparc, or floating
/// point constants on the X86.
///
virtual void emitFunctionConstantValueAddress(unsigned ConstantNum,
int Offset) {}
// 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;
/// createDebugMachineCodeEmitter - Return a dynamically allocated machine
// getCurrentPCValue - This returns the address that the next emitted byte
// will be output to.
//
virtual uint64_t getCurrentPCValue() = 0;
// forceCompilationOf - Force the compilation of the specified function, and
// return its address, because we REALLY need the address now.
//
// FIXME: This is JIT specific!
//
virtual uint64_t forceCompilationOf(Function *F) = 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 *createDebugMachineCodeEmitter();
static MachineCodeEmitter *createDebugEmitter();
/// createFilePrinterMachineCodeEmitter - Return a dynamically allocated
/// 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*
createFilePrinterMachineCodeEmitter(MachineCodeEmitter&);
///
virtual void saveBBreference(BasicBlock* BB, MachineInstr &MI) {
std::cerr << "Save BB reference unimplemented\n";
}
static MachineCodeEmitter *createFilePrinterEmitter(MachineCodeEmitter&);
};
#endif