llvm-project/llvm/lib/Target/MSP430/MSP430AsmPrinter.cpp

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5.1 KiB
C++

//===-- MSP430AsmPrinter.cpp - MSP430 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 the MSP430 assembly language.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asm-printer"
#include "MSP430.h"
#include "MSP430InstrInfo.h"
#include "MSP430TargetMachine.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
STATISTIC(EmittedInsts, "Number of machine instrs printed");
namespace {
class VISIBILITY_HIDDEN MSP430AsmPrinter : public AsmPrinter {
public:
MSP430AsmPrinter(raw_ostream &O, MSP430TargetMachine &TM,
const TargetAsmInfo *TAI, bool Fast, bool Verbose)
: AsmPrinter(O, TM, TAI, Fast, Verbose) {}
virtual const char *getPassName() const {
return "MSP430 Assembly Printer";
}
void printOperand(const MachineInstr *MI, int OpNum,
const char* Modifier = 0);
void printSrcMemOperand(const MachineInstr *MI, int OpNum,
const char* Modifier = 0);
bool printInstruction(const MachineInstr *MI); // autogenerated.
void printMachineInstruction(const MachineInstr * MI);
bool runOnMachineFunction(MachineFunction &F);
bool doInitialization(Module &M);
bool doFinalization(Module &M);
void getAnalysisUsage(AnalysisUsage &AU) const {
AsmPrinter::getAnalysisUsage(AU);
AU.setPreservesAll();
}
};
} // end of anonymous namespace
#include "MSP430GenAsmWriter.inc"
/// createMSP430CodePrinterPass - Returns a pass that prints the MSP430
/// assembly code for a MachineFunction to the given output stream,
/// using the given target machine description. This should work
/// regardless of whether the function is in SSA form.
///
FunctionPass *llvm::createMSP430CodePrinterPass(raw_ostream &o,
MSP430TargetMachine &tm,
bool fast, bool verbose) {
return new MSP430AsmPrinter(o, tm, tm.getTargetAsmInfo(), fast, verbose);
}
bool MSP430AsmPrinter::doInitialization(Module &M) {
Mang = new Mangler(M, "", TAI->getPrivateGlobalPrefix());
return false; // success
}
bool MSP430AsmPrinter::doFinalization(Module &M) {
return AsmPrinter::doFinalization(M);
}
bool MSP430AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
// Print out code for the function.
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
// Print a label for the basic block.
if (I != MF.begin()) {
printBasicBlockLabel(I, true , true);
O << '\n';
}
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) {
// Print the assembly for the instruction.
O << "\t";
printMachineInstruction(II);
}
// Each Basic Block is separated by a newline
O << '\n';
}
// We didn't modify anything
return false;
}
void MSP430AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
++EmittedInsts;
// Call the autogenerated instruction printer routines.
if (printInstruction(MI))
return;
assert(0 && "Should not happen");
}
void MSP430AsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
const char* Modifier) {
const MachineOperand &MO = MI->getOperand(OpNum);
switch (MO.getType()) {
case MachineOperand::MO_Register:
if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()))
O << TM.getRegisterInfo()->get(MO.getReg()).AsmName;
else
assert(0 && "not implemented");
break;
case MachineOperand::MO_Immediate:
if (!Modifier || strcmp(Modifier, "nohash"))
O << '#';
O << MO.getImm();
break;
case MachineOperand::MO_MachineBasicBlock:
printBasicBlockLabel(MO.getMBB());
break;
default:
assert(0 && "Not implemented yet!");
}
}
void MSP430AsmPrinter::printSrcMemOperand(const MachineInstr *MI, int OpNum,
const char* Modifier) {
const MachineOperand &Disp = MI->getOperand(OpNum);
assert(Disp.isImm() && "Displacement can be only immediate!");
// Special case: 0(Reg) -> @Reg
if (Disp.getImm() == 0) {
O << "@";
printOperand(MI, OpNum + 1);
} else {
printOperand(MI, OpNum, "nohash");
O << '(';
printOperand(MI, OpNum + 1);
O << ')';
}
}