1 //===-- MachineCodeEmitter.cpp - Implement the MachineCodeEmitter itf -----===//
3 // The LLVM Compiler Infrastructure
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.
8 //===----------------------------------------------------------------------===//
10 // This file implements the MachineCodeEmitter interface.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/MachineCodeEmitter.h"
15 #include "llvm/CodeGen/MachineFunction.h"
16 #include "llvm/Function.h"
23 struct DebugMachineCodeEmitter : public MachineCodeEmitter {
24 void startFunction(MachineFunction &F) {
25 std::cout << "\n**** Writing machine code for function: "
26 << F.getFunction()->getName() << "\n";
28 void finishFunction(MachineFunction &F) {
31 void startFunctionStub(const Function &F, unsigned StubSize) {
32 std::cout << "\n--- Function stub for function: " << F.getName() << "\n";
34 void *finishFunctionStub(const Function &F) {
39 void emitByte(unsigned char B) {
40 std::cout << "0x" << std::hex << (unsigned int)B << std::dec << " ";
42 void emitWord(unsigned W) {
43 std::cout << "0x" << std::hex << W << std::dec << " ";
45 void emitWordAt(unsigned W, unsigned *Ptr) {
46 std::cout << "0x" << std::hex << W << std::dec << " (at "
47 << (void*) Ptr << ") ";
50 uint64_t getGlobalValueAddress(GlobalValue *V) { return 0; }
51 uint64_t getGlobalValueAddress(const std::string &Name) { return 0; }
52 uint64_t getConstantPoolEntryAddress(unsigned Num) { return 0; }
53 uint64_t getCurrentPCValue() { return 0; }
55 // forceCompilationOf - Force the compilation of the specified function, and
56 // return its address, because we REALLY need the address now.
58 // FIXME: This is JIT specific!
60 virtual uint64_t forceCompilationOf(Function *F) {
65 class FilePrinterEmitter : public MachineCodeEmitter {
68 MachineCodeEmitter &MCE;
73 FilePrinterEmitter(MachineCodeEmitter &M, std::ostream &os)
74 : o(os), MCE(M), counter(0) {
78 ~FilePrinterEmitter() {
84 actual.open("lli.actual.obj");
86 std::cerr << "Cannot open 'lli.actual.obj' for writing\n";
91 void startFunction(MachineFunction &F) {
92 // resolve any outstanding calls
95 void finishFunction(MachineFunction &F) {
96 MCE.finishFunction(F);
99 void emitConstantPool(MachineConstantPool *MCP) {
100 MCE.emitConstantPool(MCP);
103 void startFunctionStub(const Function &F, unsigned StubSize) {
104 MCE.startFunctionStub(F, StubSize);
107 void *finishFunctionStub(const Function &F) {
108 return MCE.finishFunctionStub(F);
111 void emitByte(unsigned char B) {
113 actual << B; actual.flush();
115 values[counter] = (unsigned int) B;
116 if (++counter % 4 == 0 && counter != 0) {
118 for (unsigned i=0; i<4; ++i) {
119 if (values[i] < 16) o << "0";
120 o << values[i] << " ";
123 o << std::dec << "\t";
124 for (unsigned i=0; i<4; ++i) {
125 for (int j=7; j>=0; --j) {
126 o << ((values[i] >> j) & 1);
134 for (unsigned i=0; i<4; ++i)
135 instr |= values[i] << (i*8);
137 o << "--- * --- * --- * --- * ---\n";
142 void emitWord(unsigned W) {
145 void emitWordAt(unsigned W, unsigned *Ptr) {
146 MCE.emitWordAt(W, Ptr);
148 uint64_t getGlobalValueAddress(GlobalValue *V) {
149 return MCE.getGlobalValueAddress(V);
151 uint64_t getGlobalValueAddress(const std::string &Name) {
152 return MCE.getGlobalValueAddress(Name);
154 uint64_t getConstantPoolEntryAddress(unsigned Num) {
155 return MCE.getConstantPoolEntryAddress(Num);
157 uint64_t getCurrentPCValue() {
158 return MCE.getCurrentPCValue();
160 // forceCompilationOf - Force the compilation of the specified function, and
161 // return its address, because we REALLY need the address now.
163 // FIXME: This is JIT specific!
165 virtual uint64_t forceCompilationOf(Function *F) {
166 return MCE.forceCompilationOf(F);
171 /// createDebugMachineCodeEmitter - Return a dynamically allocated machine
172 /// code emitter, which just prints the opcodes and fields out the cout. This
173 /// can be used for debugging users of the MachineCodeEmitter interface.
176 MachineCodeEmitter::createDebugEmitter() {
177 return new DebugMachineCodeEmitter();
181 MachineCodeEmitter::createFilePrinterEmitter(MachineCodeEmitter &MCE) {
182 return new FilePrinterEmitter(MCE, std::cerr);