MSP430AsmPrinter.cpp [plain text]
#include "MSP430.h"
#include "InstPrinter/MSP430InstPrinter.h"
#include "MSP430InstrInfo.h"
#include "MSP430MCInstLower.h"
#include "MSP430TargetMachine.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
#define DEBUG_TYPE "asm-printer"
namespace {
class MSP430AsmPrinter : public AsmPrinter {
public:
MSP430AsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer)
: AsmPrinter(TM, std::move(Streamer)) {}
const char *getPassName() const override {
return "MSP430 Assembly Printer";
}
void printOperand(const MachineInstr *MI, int OpNum,
raw_ostream &O, const char* Modifier = nullptr);
void printSrcMemOperand(const MachineInstr *MI, int OpNum,
raw_ostream &O);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode,
raw_ostream &O) override;
bool PrintAsmMemoryOperand(const MachineInstr *MI,
unsigned OpNo, unsigned AsmVariant,
const char *ExtraCode, raw_ostream &O) override;
void EmitInstruction(const MachineInstr *MI) override;
};
}
void MSP430AsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
raw_ostream &O, const char *Modifier) {
const MachineOperand &MO = MI->getOperand(OpNum);
switch (MO.getType()) {
default: llvm_unreachable("Not implemented yet!");
case MachineOperand::MO_Register:
O << MSP430InstPrinter::getRegisterName(MO.getReg());
return;
case MachineOperand::MO_Immediate:
if (!Modifier || strcmp(Modifier, "nohash"))
O << '#';
O << MO.getImm();
return;
case MachineOperand::MO_MachineBasicBlock:
O << *MO.getMBB()->getSymbol();
return;
case MachineOperand::MO_GlobalAddress: {
bool isMemOp = Modifier && !strcmp(Modifier, "mem");
uint64_t Offset = MO.getOffset();
if (!Modifier || strcmp(Modifier, "nohash"))
O << (isMemOp ? '&' : '#');
if (Offset)
O << '(' << Offset << '+';
O << *getSymbol(MO.getGlobal());
if (Offset)
O << ')';
return;
}
}
}
void MSP430AsmPrinter::printSrcMemOperand(const MachineInstr *MI, int OpNum,
raw_ostream &O) {
const MachineOperand &Base = MI->getOperand(OpNum);
const MachineOperand &Disp = MI->getOperand(OpNum+1);
if (Disp.isImm() && !Base.getReg())
O << '&';
printOperand(MI, OpNum+1, O, "nohash");
if (Base.getReg()) {
O << '(';
printOperand(MI, OpNum, O);
O << ')';
}
}
bool MSP430AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode, raw_ostream &O) {
if (ExtraCode && ExtraCode[0])
return true;
printOperand(MI, OpNo, O);
return false;
}
bool MSP430AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
unsigned OpNo, unsigned AsmVariant,
const char *ExtraCode,
raw_ostream &O) {
if (ExtraCode && ExtraCode[0]) {
return true; }
printSrcMemOperand(MI, OpNo, O);
return false;
}
void MSP430AsmPrinter::EmitInstruction(const MachineInstr *MI) {
MSP430MCInstLower MCInstLowering(OutContext, *this);
MCInst TmpInst;
MCInstLowering.Lower(MI, TmpInst);
EmitToStreamer(OutStreamer, TmpInst);
}
extern "C" void LLVMInitializeMSP430AsmPrinter() {
RegisterAsmPrinter<MSP430AsmPrinter> X(TheMSP430Target);
}