mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 03:29:40 +00:00
c982cfad87
addPassesToEmitMachineCode()
* Add support for registers and constants in getMachineOpValue()
This enables running "int main() { ret 0 }" via the PowerPC JIT.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16983 91177308-0d34-0410-b5e6-96231b3b80d8
134 lines
4.4 KiB
C++
134 lines
4.4 KiB
C++
//===-- PPC32CodeEmitter.cpp - JIT Code Emitter for PowerPC32 -----*- C++ -*-=//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the PowerPC 32-bit CodeEmitter and associated machinery to
|
|
// JIT-compile bytecode to native PowerPC.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "PPC32JITInfo.h"
|
|
#include "PPC32TargetMachine.h"
|
|
#include "llvm/CodeGen/MachineCodeEmitter.h"
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include "llvm/CodeGen/Passes.h"
|
|
#include "llvm/Support/Debug.h"
|
|
|
|
namespace llvm {
|
|
|
|
namespace {
|
|
class PPC32CodeEmitter : public MachineFunctionPass {
|
|
TargetMachine &TM;
|
|
MachineCodeEmitter &MCE;
|
|
|
|
int64_t getMachineOpValue(MachineInstr &MI, MachineOperand &MO);
|
|
|
|
public:
|
|
PPC32CodeEmitter(TargetMachine &T, MachineCodeEmitter &M)
|
|
: TM(T), MCE(M) {}
|
|
|
|
const char *getPassName() const { return "PowerPC Machine Code Emitter"; }
|
|
|
|
/// runOnMachineFunction - emits the given MachineFunction to memory
|
|
///
|
|
bool runOnMachineFunction(MachineFunction &MF);
|
|
|
|
/// emitBasicBlock - emits the given MachineBasicBlock to memory
|
|
///
|
|
void emitBasicBlock(MachineBasicBlock &MBB);
|
|
|
|
/// emitWord - write a 32-bit word to memory at the current PC
|
|
///
|
|
void emitWord(unsigned w) { MCE.emitWord(w); }
|
|
|
|
/// getValueBit - return the particular bit of Val
|
|
///
|
|
unsigned getValueBit(int64_t Val, unsigned bit) { return (Val >> bit) & 1; }
|
|
|
|
/// getBinaryCodeForInstr - returns the assembled code for an instruction
|
|
///
|
|
unsigned getBinaryCodeForInstr(MachineInstr &MI);
|
|
};
|
|
}
|
|
|
|
/// addPassesToEmitMachineCode - Add passes to the specified pass manager to get
|
|
/// machine code emitted. This uses a MachineCodeEmitter object to handle
|
|
/// actually outputting the machine code and resolving things like the address
|
|
/// of functions. This method should returns true if machine code emission is
|
|
/// not supported.
|
|
///
|
|
bool PPC32TargetMachine::addPassesToEmitMachineCode(FunctionPassManager &PM,
|
|
MachineCodeEmitter &MCE) {
|
|
// Machine code emitter pass for PowerPC
|
|
PM.add(new PPC32CodeEmitter(*this, MCE));
|
|
// Delete machine code for this function after emitting it
|
|
PM.add(createMachineCodeDeleter());
|
|
return false;
|
|
}
|
|
|
|
bool PPC32CodeEmitter::runOnMachineFunction(MachineFunction &MF) {
|
|
MCE.startFunction(MF);
|
|
MCE.emitConstantPool(MF.getConstantPool());
|
|
for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
|
|
emitBasicBlock(*I);
|
|
MCE.finishFunction(MF);
|
|
return false;
|
|
}
|
|
|
|
void PPC32CodeEmitter::emitBasicBlock(MachineBasicBlock &MBB) {
|
|
for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E; ++I)
|
|
emitWord(getBinaryCodeForInstr(*I));
|
|
}
|
|
|
|
int64_t PPC32CodeEmitter::getMachineOpValue(MachineInstr &MI,
|
|
MachineOperand &MO) {
|
|
int64_t rv = 0; // Return value; defaults to 0 for unhandled cases
|
|
// or things that get fixed up later by the JIT.
|
|
if (MO.isPCRelativeDisp()) {
|
|
std::cerr << "PPC32CodeEmitter: PC-relative disp unhandled\n";
|
|
abort();
|
|
} else if (MO.isRegister()) {
|
|
rv = MO.getReg();
|
|
} else if (MO.isImmediate()) {
|
|
rv = MO.getImmedValue();
|
|
#if 0
|
|
} else if (MO.isGlobalAddress()) {
|
|
} else if (MO.isMachineBasicBlock()) {
|
|
MachineBasicBlock *MBB = MO.getMachineBasicBlock();
|
|
} else if (MO.isExternalSymbol()) {
|
|
} else if (MO.isFrameIndex()) {
|
|
unsigned index = MO.getFrameIndex();
|
|
} else if (MO.isConstantPoolIndex()) {
|
|
unsigned index = MO.getCosntantPoolIndex();
|
|
#endif
|
|
} else {
|
|
std::cerr << "ERROR: Unknown type of MachineOperand: " << MO << "\n";
|
|
abort();
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
|
|
void *PPC32JITInfo::getJITStubForFunction(Function *F,
|
|
MachineCodeEmitter &MCE) {
|
|
std::cerr << "PPC32JITInfo::getJITStubForFunction not implemented\n";
|
|
abort();
|
|
return 0;
|
|
}
|
|
|
|
void PPC32JITInfo::replaceMachineCodeForFunction (void *Old, void *New) {
|
|
std::cerr << "PPC32JITInfo::replaceMachineCodeForFunction not implemented\n";
|
|
abort();
|
|
}
|
|
|
|
#include "PPC32GenCodeEmitter.inc"
|
|
|
|
} // end llvm namespace
|
|
|