MachineCodeEmitter.cpp revision 3a9cfbaf861076128be6acd27826a1176abf79b3 
1//===-- MachineCodeEmitter.cpp - Implement the MachineCodeEmitter itf -----===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the MachineCodeEmitter interface.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/CodeGen/MachineCodeEmitter.h"
15#include <fstream>
16#include <iostream>
17
18using namespace llvm;
19
20namespace {
21  class FilePrinterEmitter : public MachineCodeEmitter {
22    std::ofstream actual;
23    std::ostream &o;
24    MachineCodeEmitter &MCE;
25    unsigned counter;
26    unsigned values[4];
27
28  public:
29    FilePrinterEmitter(MachineCodeEmitter &M, std::ostream &os)
30      : o(os), MCE(M), counter(0) {
31      openActual();
32    }
33
34    ~FilePrinterEmitter() {
35      o << "\n";
36      actual.close();
37    }
38
39    void openActual() {
40      actual.open("lli.actual.obj");
41      if (!actual.good()) {
42        std::cerr << "Cannot open 'lli.actual.obj' for writing\n";
43        abort();
44      }
45    }
46
47    void startFunction(MachineFunction &F) {
48      // resolve any outstanding calls
49      MCE.startFunction(F);
50    }
51    void finishFunction(MachineFunction &F) {
52      MCE.finishFunction(F);
53    }
54
55    void emitConstantPool(MachineConstantPool *MCP) {
56      MCE.emitConstantPool(MCP);
57    }
58    void initJumpTableInfo(MachineJumpTableInfo *MJTI) {
59      MCE.initJumpTableInfo(MJTI);
60    }
61    void emitJumpTableInfo(MachineJumpTableInfo *MJTI,
62                           std::map<MachineBasicBlock*,uint64_t> &MBBM) {
63      MCE.emitJumpTableInfo(MJTI, MBBM);
64    }
65
66    void startFunctionStub(unsigned StubSize) {
67      MCE.startFunctionStub(StubSize);
68    }
69
70    void *finishFunctionStub(const Function *F) {
71      return MCE.finishFunctionStub(F);
72    }
73
74    void emitByte(unsigned char B) {
75      MCE.emitByte(B);
76      actual << B; actual.flush();
77
78      values[counter] = (unsigned int) B;
79      if (++counter % 4 == 0 && counter != 0) {
80        o << std::hex;
81        for (unsigned i=0; i<4; ++i) {
82          if (values[i] < 16) o << "0";
83          o << values[i] << " ";
84        }
85
86        o << std::dec << "\t";
87        for (unsigned i=0; i<4; ++i) {
88          for (int j=7; j>=0; --j) {
89            o << ((values[i] >> j) & 1);
90          }
91          o << " ";
92        }
93
94        o << "\n";
95
96        unsigned instr = 0;
97        for (unsigned i=0; i<4; ++i)
98          instr |= values[i] << (i*8);
99
100        o << "--- * --- * --- * --- * ---\n";
101        counter %= 4;
102      }
103    }
104
105    void emitWord(unsigned W) {
106      MCE.emitWord(W);
107    }
108    void emitWordAt(unsigned W, unsigned *Ptr) {
109      MCE.emitWordAt(W, Ptr);
110    }
111    uint64_t getConstantPoolEntryAddress(unsigned Num) {
112      return MCE.getConstantPoolEntryAddress(Num);
113    }
114    uint64_t getJumpTableEntryAddress(unsigned Num) {
115      return MCE.getJumpTableEntryAddress(Num);
116    }
117    virtual unsigned char* allocateGlobal(unsigned size, unsigned alignment)
118    { return MCE.allocateGlobal(size, alignment); }
119
120    uint64_t getCurrentPCValue() {
121      return MCE.getCurrentPCValue();
122    }
123    uint64_t getCurrentPCOffset() {
124      return MCE.getCurrentPCOffset();
125    }
126    void addRelocation(const MachineRelocation &MR) {
127      return MCE.addRelocation(MR);
128    }
129  };
130}
131
132MachineCodeEmitter *
133MachineCodeEmitter::createFilePrinterEmitter(MachineCodeEmitter &MCE) {
134  return new FilePrinterEmitter(MCE, std::cerr);
135}
136