lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.h

//===-- X86ATTAsmPrinter.h - Convert X86 LLVM code to AT&T assembly -------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// AT&T assembly code printer class.
//
//===----------------------------------------------------------------------===//

#ifndef X86ATTASMPRINTER_H
#define X86ATTASMPRINTER_H

#include "../X86.h"
#include "../X86MachineFunctionInfo.h"
#include "../X86TargetMachine.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/Support/Compiler.h"

namespace llvm {

class MachineJumpTableInfo;
class MCContext;
class MCInst;
class MCStreamer;
class MCSymbol;

class VISIBILITY_HIDDEN X86ATTAsmPrinter : public AsmPrinter {
  const X86Subtarget *Subtarget;
 public:
  explicit X86ATTAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
                            const MCAsmInfo *T, bool V)
    : AsmPrinter(O, TM, T, V) {
    Subtarget = &TM.getSubtarget<X86Subtarget>();
  }

  virtual const char *getPassName() const {
    return "X86 AT&T-Style Assembly Printer";
  }
  
  const X86Subtarget &getSubtarget() const { return *Subtarget; }

  void getAnalysisUsage(AnalysisUsage &AU) const {
    AU.setPreservesAll();
    if (Subtarget->isTargetDarwin() ||
        Subtarget->isTargetELF() ||
        Subtarget->isTargetCygMing()) {
      AU.addRequired<MachineModuleInfo>();
    }
    AU.addRequired<DwarfWriter>();
    AsmPrinter::getAnalysisUsage(AU);
  }

  bool doFinalization(Module &M);

  void printInstructionThroughMCStreamer(const MachineInstr *MI);


  void printMCInst(const MCInst *MI);

  void printSymbolOperand(const MachineOperand &MO);
  
  

  // These methods are used by the tablegen'erated instruction printer.
  void printOperand(const MachineInstr *MI, unsigned OpNo,
                    const char *Modifier = 0);
  void print_pcrel_imm(const MachineInstr *MI, unsigned OpNo);

  void printopaquemem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }

  void printi8mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printi16mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printi32mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printi64mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printi128mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printi256mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printf32mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printf64mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printf80mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printf128mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printf256mem(const MachineInstr *MI, unsigned OpNo) {
    printMemReference(MI, OpNo);
  }
  void printlea32mem(const MachineInstr *MI, unsigned OpNo) {
    printLeaMemReference(MI, OpNo);
  }
  void printlea64mem(const MachineInstr *MI, unsigned OpNo) {
    printLeaMemReference(MI, OpNo);
  }
  void printlea64_32mem(const MachineInstr *MI, unsigned OpNo) {
    printLeaMemReference(MI, OpNo, "subreg64");
  }

  bool printAsmMRegister(const MachineOperand &MO, char Mode);
  bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
                       unsigned AsmVariant, const char *ExtraCode);
  bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
                             unsigned AsmVariant, const char *ExtraCode);

  void printMachineInstruction(const MachineInstr *MI);
  void printSSECC(const MachineInstr *MI, unsigned Op);
  void printMemReference(const MachineInstr *MI, unsigned Op,
                         const char *Modifier=NULL);
  void printLeaMemReference(const MachineInstr *MI, unsigned Op,
                            const char *Modifier=NULL);
  void printPICJumpTableSetLabel(unsigned uid,
                                 const MachineBasicBlock *MBB) const;
  void printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
                                 const MachineBasicBlock *MBB) const {
    AsmPrinter::printPICJumpTableSetLabel(uid, uid2, MBB);
  }
  void printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
                              const MachineBasicBlock *MBB,
                              unsigned uid) const;

  void printPICLabel(const MachineInstr *MI, unsigned Op);
  void PrintGlobalVariable(const GlobalVariable* GVar);

  void PrintPICBaseSymbol() const;
  
  bool runOnMachineFunction(MachineFunction &F);

  void emitFunctionHeader(const MachineFunction &MF);

  // Necessary for Darwin to print out the appropriate types of linker stubs.
  DenseMap<MCSymbol*, MCSymbol*> FnStubs;  // Darwin $stub stubs.
  DenseMap<MCSymbol*, MCSymbol*> GVStubs;  // Darwin $non_lazy_ptr stub.
  DenseMap<MCSymbol*, MCSymbol*> HiddenGVStubs;  // Darwin $non_lazy_ptr stub.

  // Necessary for dllexport support
  StringSet<> CygMingStubs, DLLExportedFns, DLLExportedGVs;

  // We have to propagate some information about MachineFunction to
  // AsmPrinter. It's ok, when we're printing the function, since we have
  // access to MachineFunction and can get the appropriate MachineFunctionInfo.
  // Unfortunately, this is not possible when we're printing reference to
  // Function (e.g. calling it and so on). Even more, there is no way to get the
  // corresponding MachineFunctions: it can even be not created at all. That's
  // why we should use additional structure, when we're collecting all necessary
  // information.
  //
  // This structure is using e.g. for name decoration for stdcall & fastcall'ed
  // function, since we have to use arguments' size for decoration.
  typedef std::map<const Function*, X86MachineFunctionInfo> FMFInfoMap;
  FMFInfoMap FunctionInfoMap;

  void DecorateCygMingName(std::string &Name, const GlobalValue *GV);
  void DecorateCygMingName(SmallVectorImpl<char> &Name, const GlobalValue *GV);
};

} // end namespace llvm

#endif