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//===-- AlphaAsmPrinter.cpp - Alpha LLVM assembly writer ------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains a printer that converts from our internal representation
// of machine-dependent LLVM code to GAS-format Alpha assembly language.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asm-printer"
#include "Alpha.h"
#include "AlphaInstrInfo.h"
#include "AlphaTargetMachine.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
struct AlphaAsmPrinter : public AsmPrinter {
/// Unique incrementer for label values for referencing Global values.
///
explicit AlphaAsmPrinter(TargetMachine &tm, MCStreamer &Streamer)
: AsmPrinter(tm, Streamer) {}
virtual const char *getPassName() const {
return "Alpha Assembly Printer";
}
void printInstruction(const MachineInstr *MI, raw_ostream &O);
void EmitInstruction(const MachineInstr *MI) {
SmallString<128> Str;
raw_svector_ostream OS(Str);
printInstruction(MI, OS);
OutStreamer.EmitRawText(OS.str());
}
static const char *getRegisterName(unsigned RegNo);
void printOp(const MachineOperand &MO, raw_ostream &O);
void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
virtual void EmitFunctionBodyStart();
virtual void EmitFunctionBodyEnd();
void EmitStartOfAsmFile(Module &M);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode,
raw_ostream &O);
bool PrintAsmMemoryOperand(const MachineInstr *MI,
unsigned OpNo, unsigned AsmVariant,
const char *ExtraCode, raw_ostream &O);
};
} // end of anonymous namespace
#include "AlphaGenAsmWriter.inc"
void AlphaAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
raw_ostream &O) {
const MachineOperand &MO = MI->getOperand(opNum);
if (MO.isReg()) {
assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
"Not physreg??");
O << getRegisterName(MO.getReg());
} else if (MO.isImm()) {
O << MO.getImm();
assert(MO.getImm() < (1 << 30));
} else {
printOp(MO, O);
}
}
void AlphaAsmPrinter::printOp(const MachineOperand &MO, raw_ostream &O) {
switch (MO.getType()) {
case MachineOperand::MO_Register:
O << getRegisterName(MO.getReg());
return;
case MachineOperand::MO_Immediate:
llvm_unreachable("printOp() does not handle immediate values");
return;
case MachineOperand::MO_MachineBasicBlock:
O << *MO.getMBB()->getSymbol();
return;
case MachineOperand::MO_ConstantPoolIndex:
O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
<< MO.getIndex();
return;
case MachineOperand::MO_ExternalSymbol:
O << MO.getSymbolName();
return;
case MachineOperand::MO_GlobalAddress:
O << *Mang->getSymbol(MO.getGlobal());
return;
case MachineOperand::MO_JumpTableIndex:
O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
<< '_' << MO.getIndex();
return;
default:
O << "<unknown operand type: " << MO.getType() << ">";
return;
}
}
/// EmitFunctionBodyStart - Targets can override this to emit stuff before
/// the first basic block in the function.
void AlphaAsmPrinter::EmitFunctionBodyStart() {
OutStreamer.EmitRawText("\t.ent " + Twine(CurrentFnSym->getName()));
}
/// EmitFunctionBodyEnd - Targets can override this to emit stuff after
/// the last basic block in the function.
void AlphaAsmPrinter::EmitFunctionBodyEnd() {
OutStreamer.EmitRawText("\t.end " + Twine(CurrentFnSym->getName()));
}
void AlphaAsmPrinter::EmitStartOfAsmFile(Module &M) {
OutStreamer.EmitRawText(StringRef("\t.arch ev6"));
OutStreamer.EmitRawText(StringRef("\t.set noat"));
}
/// PrintAsmOperand - Print out an operand for an inline asm expression.
///
bool AlphaAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode, raw_ostream &O) {
printOperand(MI, OpNo, O);
return false;
}
bool AlphaAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
unsigned OpNo, unsigned AsmVariant,
const char *ExtraCode,
raw_ostream &O) {
if (ExtraCode && ExtraCode[0])
return true; // Unknown modifier.
O << "0(";
printOperand(MI, OpNo, O);
O << ")";
return false;
}
// Force static initialization.
extern "C" void LLVMInitializeAlphaAsmPrinter() {
RegisterAsmPrinter<AlphaAsmPrinter> X(TheAlphaTarget);
}
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