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//===--- lib/CodeGen/DwarfPrinter.h - Dwarf Printer -------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Emit general DWARF directives.
//
//===----------------------------------------------------------------------===//
#ifndef CODEGEN_ASMPRINTER_DWARFPRINTER_H__
#define CODEGEN_ASMPRINTER_DWARFPRINTER_H__
#include "llvm/CodeGen/MachineLocation.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/FormattedStream.h"
#include <vector>
namespace llvm {
class AsmPrinter;
class MachineFunction;
class MachineModuleInfo;
class Module;
class MCAsmInfo;
class TargetData;
class TargetRegisterInfo;
class GlobalValue;
class MCSymbol;
class Twine;
class DwarfPrinter {
protected:
~DwarfPrinter() {}
//===-------------------------------------------------------------==---===//
// Core attributes used by the DWARF printer.
//
/// Asm - Target of Dwarf emission.
AsmPrinter *Asm;
/// MAI - Target asm information.
const MCAsmInfo *MAI;
/// TD - Target data.
const TargetData *TD;
/// RI - Register Information.
const TargetRegisterInfo *RI;
/// M - Current module.
Module *M;
/// MF - Current machine function.
const MachineFunction *MF;
/// MMI - Collected machine module information.
MachineModuleInfo *MMI;
/// SubprogramCount - The running count of functions being compiled.
unsigned SubprogramCount;
DwarfPrinter(AsmPrinter *A);
public:
//===------------------------------------------------------------------===//
// Accessors.
//
const AsmPrinter *getAsm() const { return Asm; }
MachineModuleInfo *getMMI() const { return MMI; }
const MCAsmInfo *getMCAsmInfo() const { return MAI; }
const TargetData *getTargetData() const { return TD; }
/// getDWLabel - Return the MCSymbol corresponding to the assembler temporary
/// label with the specified stem and unique ID.
MCSymbol *getDWLabel(const char *Name, unsigned ID) const;
/// getTempLabel - Return an assembler temporary label with the specified
/// name.
MCSymbol *getTempLabel(const char *Name) const;
/// SizeOfEncodedValue - Return the size of the encoding in bytes.
unsigned SizeOfEncodedValue(unsigned Encoding) const;
/// EmitEncodingByte - Emit a .byte 42 directive that corresponds to an
/// encoding. If verbose assembly output is enabled, we output comments
/// describing the encoding. Desc is a string saying what the encoding is
/// specifying (e.g. "LSDA").
void EmitEncodingByte(unsigned Val, const char *Desc);
/// EmitCFAByte - Emit a .byte 42 directive for a DW_CFA_xxx value.
void EmitCFAByte(unsigned Val);
/// EmitSLEB128 - emit the specified signed leb128 value.
void EmitSLEB128(int Value, const char *Desc) const;
/// EmitULEB128 - emit the specified unsigned leb128 value.
void EmitULEB128(unsigned Value, const char *Desc = 0,
unsigned PadTo = 0) const;
/// EmitReference - Emit a reference to a label.
///
void EmitReference(const MCSymbol *Sym, unsigned Encoding) const;
void EmitReference(const GlobalValue *GV, unsigned Encoding) const;
/// EmitDifference - Emit the difference between two labels.
void EmitDifference(const MCSymbol *LabelHi, const MCSymbol *LabelLo,
bool IsSmall = false);
/// EmitSectionOffset - Emit Label-Section or use a special purpose directive
/// to emit a section offset if the target has one.
void EmitSectionOffset(const MCSymbol *Label, const MCSymbol *Section,
bool IsSmall = false, bool isEH = false);
/// EmitFrameMoves - Emit frame instructions to describe the layout of the
/// frame.
void EmitFrameMoves(MCSymbol *BaseLabel,
const std::vector<MachineMove> &Moves, bool isEH);
};
} // end llvm namespace
#endif
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