llvm-6502/lib/MC/MCStreamer.cpp
2010-11-22 14:27:24 +00:00

122 lines
3.9 KiB
C++

//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
#include <cstdlib>
using namespace llvm;
MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), CurSection(0),
PrevSection(0) {
}
MCStreamer::~MCStreamer() {
}
raw_ostream &MCStreamer::GetCommentOS() {
// By default, discard comments.
return nulls();
}
/// EmitIntValue - Special case of EmitValue that avoids the client having to
/// pass in a MCExpr for constant integers.
void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
unsigned AddrSpace) {
EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace);
}
/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
/// client having to pass in a MCExpr for constant integers.
void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace) {
EmitULEB128Value(MCConstantExpr::Create(Value, getContext()), AddrSpace);
}
/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
/// client having to pass in a MCExpr for constant integers.
void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
EmitSLEB128Value(MCConstantExpr::Create(Value, getContext()), AddrSpace);
}
void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
unsigned AddrSpace) {
EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace);
}
/// EmitFill - Emit NumBytes bytes worth of the value specified by
/// FillValue. This implements directives such as '.space'.
void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
unsigned AddrSpace) {
const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
for (uint64_t i = 0, e = NumBytes; i != e; ++i)
EmitValue(E, 1, AddrSpace);
}
bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
StringRef Filename) {
return getContext().GetDwarfFile(Filename, FileNo) == 0;
}
void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
unsigned Column, unsigned Flags,
unsigned Isa,
unsigned Discriminator) {
getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
Discriminator);
}
bool MCStreamer::EmitCFIStartProc() {
return false;
}
bool MCStreamer::EmitCFIEndProc() {
return false;
}
bool MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
return false;
}
bool MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
return false;
}
bool MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
return false;
}
bool MCStreamer::EmitCFIPersonality(const MCSymbol *Sym) {
return false;
}
bool MCStreamer::EmitCFILsda(const MCSymbol *Sym) {
return false;
}
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
/// the specified string in the output .s file. This capability is
/// indicated by the hasRawTextSupport() predicate.
void MCStreamer::EmitRawText(StringRef String) {
errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
" something must not be fully mc'ized\n";
abort();
}
void MCStreamer::EmitRawText(const Twine &T) {
SmallString<128> Str;
T.toVector(Str);
EmitRawText(Str.str());
}