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//===-- MachineCodeEmitter.cpp - Implement the MachineCodeEmitter itf -----===//
//
// This file implements the MachineCodeEmitter interface.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Function.h"
#include <iostream>
#include <fstream>
namespace {
struct DebugMachineCodeEmitter : public MachineCodeEmitter {
void startFunction(MachineFunction &F) {
std::cout << "\n**** Writing machine code for function: "
<< F.getFunction()->getName() << "\n";
}
void finishFunction(MachineFunction &F) {
std::cout << "\n";
}
void startBasicBlock(MachineBasicBlock &BB) {
std::cout << "\n--- Basic Block: " << BB.getBasicBlock()->getName()<<"\n";
}
void startFunctionStub(const Function &F, unsigned StubSize) {
std::cout << "\n--- Function stub for function: " << F.getName() << "\n";
}
void *finishFunctionStub(const Function &F) {
std::cout << "\n";
return 0;
}
void emitByte(unsigned char B) {
std::cout << "0x" << std::hex << (unsigned int)B << std::dec << " ";
}
void emitPCRelativeDisp(Value *V) {
std::cout << "<disp %" << V->getName() << ": 0xXX 0xXX 0xXX 0xXX> ";
}
void emitGlobalAddress(GlobalValue *V, bool isPCRelative) {
std::cout << "<addr %" << V->getName() << ": 0xXX 0xXX 0xXX 0xXX> ";
}
void emitGlobalAddress(const std::string &Name, bool isPCRelative) {
std::cout << "<addr %" << Name << ": 0xXX 0xXX 0xXX 0xXX> ";
}
void emitFunctionConstantValueAddress(unsigned ConstantNum, int Offset) {
std::cout << "<addr const#" << ConstantNum;
if (Offset) std::cout << " + " << Offset;
std::cout << "> ";
}
};
}
/// createDebugMachineCodeEmitter - 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.
///
MachineCodeEmitter *MachineCodeEmitter::createDebugMachineCodeEmitter() {
return new DebugMachineCodeEmitter();
}
namespace {
class FilePrinterMachineCodeEmitter : public MachineCodeEmitter {
std::ofstream f, actual;
std::ostream &o;
MachineCodeEmitter *MCE;
unsigned counter;
bool mustClose;
unsigned values[4];
public:
FilePrinterMachineCodeEmitter() :
f("lli.out"), o(f), counter(0), mustClose(true)
{
if (! f.good()) {
std::cerr << "Cannot open 'lli.out' for writing\n";
abort();
}
openActual();
}
FilePrinterMachineCodeEmitter(MachineCodeEmitter &M, std::ostream &os) :
o(os), MCE(&M), counter(0)
{
FilePrinterMachineCodeEmitter();
mustClose = false;
openActual();
}
~FilePrinterMachineCodeEmitter() {
o << "\n";
actual.close();
if (mustClose) f.close();
}
void openActual() {
actual.open("lli.actual.obj");
if (! actual.good()) {
std::cerr << "Cannot open 'lli.actual.obj' for writing\n";
abort();
}
}
void startFunction(MachineFunction &F) {
// resolve any outstanding calls
if (MCE) MCE->startFunction(F);
}
void finishFunction(MachineFunction &F) {
if (MCE) MCE->finishFunction(F);
}
void startBasicBlock(MachineBasicBlock &BB) {
// if any instructions were waiting for the address of this block,
// let them fix their addresses now
if (MCE) MCE->startBasicBlock(BB);
}
void startFunctionStub(const Function &F, unsigned StubSize) {
//
if (MCE) MCE->startFunctionStub(F, StubSize);
}
void *finishFunctionStub(const Function &F) {
if (MCE) return MCE->finishFunctionStub(F);
else return 0;
}
void emitByte(unsigned char B) {
if (MCE) MCE->emitByte(B);
actual << B; actual.flush();
values[counter] = (unsigned int) B;
if (++counter % 4 == 0 && counter != 0) {
o << std::hex;
for (unsigned i=0; i<4; ++i) {
if (values[i] < 16) o << "0";
o << values[i] << " ";
}
o << std::dec << "\t";
for (unsigned i=0; i<4; ++i) {
for (int j=7; j>=0; --j) {
o << ((values[i] >> j) & 1);
}
o << " ";
}
o << "\n";
unsigned instr = 0;
for (unsigned i=0; i<4; ++i)
instr |= values[i] << (i*8);
o << "--- * --- * --- * --- * ---\n";
counter %= 4;
}
}
void emitPCRelativeDisp(Value *V) {
// put block in mapping BB -> { instr, address }. when BB is beginning to
// output, find instr, set disp, overwrite instr at addr using the
// unsigned value gotten from emitter
}
void emitGlobalAddress(GlobalValue *V, bool isPCRelative) {
if (MCE) MCE->emitGlobalAddress(V, isPCRelative);
}
void emitGlobalAddress(const std::string &Name, bool isPCRelative) {
if (MCE) MCE->emitGlobalAddress(Name, isPCRelative);
}
void emitFunctionConstantValueAddress(unsigned ConstantNum, int Offset) {
if (MCE) MCE->emitFunctionConstantValueAddress(ConstantNum, Offset);
}
};
}
MachineCodeEmitter *MachineCodeEmitter::createFilePrinterMachineCodeEmitter(MachineCodeEmitter &MCE) {
return new FilePrinterMachineCodeEmitter(MCE, std::cerr);
}
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