MachineCodeEmitter.cpp revision f815aebd20823698fca5db54dc8e0332f93e7ca8 
1//===-- MachineCodeEmitter.cpp - Implement the MachineCodeEmitter itf -----===//
2//
3// This file implements the MachineCodeEmitter interface.
4//
5//===----------------------------------------------------------------------===//
6
7#include "llvm/CodeGen/MachineCodeEmitter.h"
8#include "llvm/CodeGen/MachineFunction.h"
9#include "llvm/Function.h"
10#include <iostream>
11
12namespace {
13  struct DebugMachineCodeEmitter : public MachineCodeEmitter {
14    void startFunction(MachineFunction &F) {
15      std::cout << "\n**** Writing machine code for function: "
16                << F.getFunction()->getName() << "\n";
17    }
18    void finishFunction(MachineFunction &F) {
19      std::cout << "\n";
20    }
21    void startBasicBlock(MachineBasicBlock &BB) {
22      std::cout << "\n--- Basic Block: " << BB.getBasicBlock()->getName()<<"\n";
23    }
24
25    void emitByte(unsigned char B) {
26      std::cout << "0x" << std::hex << (unsigned int)B << std::dec << " ";
27    }
28    void emitPCRelativeDisp(Value *V) {
29      std::cout << "<" << V->getName() << ": 0xXX 0xXX 0xXX 0xXX> ";
30    }
31  };
32}
33
34
35/// createDebugMachineCodeEmitter - Return a dynamically allocated machine
36/// code emitter, which just prints the opcodes and fields out the cout.  This
37/// can be used for debugging users of the MachineCodeEmitter interface.
38///
39MachineCodeEmitter *MachineCodeEmitter::createDebugMachineCodeEmitter() {
40  return new DebugMachineCodeEmitter();
41}
42