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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/CodeGen/DwarfWriter.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/ADT/Statistic.h"
using namespace llvm;
STATISTIC(EmittedInsts, "Number of machine instrs printed");
namespace {
struct AlphaAsmPrinter : public AsmPrinter {
/// Unique incrementer for label values for referencing Global values.
///
explicit AlphaAsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
const MCAsmInfo *T, bool V)
: AsmPrinter(o, tm, T, V) {}
virtual const char *getPassName() const {
return "Alpha Assembly Printer";
}
void printInstruction(const MachineInstr *MI);
static const char *getRegisterName(unsigned RegNo);
void printOp(const MachineOperand &MO, bool IsCallOp = false);
void printOperand(const MachineInstr *MI, int opNum);
void printBaseOffsetPair(const MachineInstr *MI, int i, bool brackets=true);
bool runOnMachineFunction(MachineFunction &F);
void EmitStartOfAsmFile(Module &M);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode);
bool PrintAsmMemoryOperand(const MachineInstr *MI,
unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode);
};
} // end of anonymous namespace
#include "AlphaGenAsmWriter.inc"
void AlphaAsmPrinter::printOperand(const MachineInstr *MI, int opNum)
{
const MachineOperand &MO = MI->getOperand(opNum);
if (MO.getType() == MachineOperand::MO_Register) {
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);
}
}
void AlphaAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) {
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(OutContext);
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 << *GetGlobalValueSymbol(MO.getGlobal());
return;
case MachineOperand::MO_JumpTableIndex:
O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
<< '_' << MO.getIndex();
return;
default:
O << "<unknown operand type: " << MO.getType() << ">";
return;
}
}
/// runOnMachineFunction - This uses the printMachineInstruction()
/// method to print assembly for each instruction.
///
bool AlphaAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
SetupMachineFunction(MF);
O << "\n\n";
EmitFunctionHeader();
O << "\t.ent " << *CurrentFnSym << "\n";
// Print out code for the function.
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
if (I != MF.begin())
EmitBasicBlockStart(I);
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) {
// Print the assembly for the instruction.
++EmittedInsts;
processDebugLoc(II, true);
printInstruction(II);
if (VerboseAsm)
EmitComments(*II);
O << '\n';
processDebugLoc(II, false);
}
}
O << "\t.end " << *CurrentFnSym << "\n";
// Print out jump tables referenced by the function
EmitJumpTableInfo(MF);
// We didn't modify anything.
return false;
}
void AlphaAsmPrinter::EmitStartOfAsmFile(Module &M) {
if (TM.getSubtarget<AlphaSubtarget>().hasCT())
O << "\t.arch ev6\n"; //This might need to be ev67, so leave this test here
else
O << "\t.arch ev6\n";
O << "\t.set noat\n";
}
/// PrintAsmOperand - Print out an operand for an inline asm expression.
///
bool AlphaAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode) {
printOperand(MI, OpNo);
return false;
}
bool AlphaAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode) {
if (ExtraCode && ExtraCode[0])
return true; // Unknown modifier.
O << "0(";
printOperand(MI, OpNo);
O << ")";
return false;
}
// Force static initialization.
extern "C" void LLVMInitializeAlphaAsmPrinter() {
RegisterAsmPrinter<AlphaAsmPrinter> X(TheAlphaTarget);
}
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