MCStreamer.cpp revision 206274
175409Sache//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===// 2125763Sache// 3125763Sache// The LLVM Compiler Infrastructure 4125763Sache// 575807Sache// This file is distributed under the University of Illinois Open Source 647564Sache// License. See LICENSE.TXT for details. 747564Sache// 8119614Sache//===----------------------------------------------------------------------===// 9119614Sache 10119614Sache#include "llvm/MC/MCStreamer.h" 11119614Sache#include "llvm/MC/MCExpr.h" 12#include "llvm/Support/raw_ostream.h" 13#include "llvm/ADT/SmallString.h" 14#include "llvm/ADT/Twine.h" 15#include <cstdlib> 16using namespace llvm; 17 18MCStreamer::MCStreamer(MCContext &_Context) : Context(_Context), CurSection(0) { 19} 20 21MCStreamer::~MCStreamer() { 22} 23 24raw_ostream &MCStreamer::GetCommentOS() { 25 // By default, discard comments. 26 return nulls(); 27} 28 29 30/// EmitIntValue - Special case of EmitValue that avoids the client having to 31/// pass in a MCExpr for constant integers. 32void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size, 33 unsigned AddrSpace) { 34 EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace); 35} 36 37void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size, 38 unsigned AddrSpace) { 39 EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace); 40} 41 42/// EmitFill - Emit NumBytes bytes worth of the value specified by 43/// FillValue. This implements directives such as '.space'. 44void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue, 45 unsigned AddrSpace) { 46 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext()); 47 for (uint64_t i = 0, e = NumBytes; i != e; ++i) 48 EmitValue(E, 1, AddrSpace); 49} 50 51/// EmitRawText - If this file is backed by a assembly streamer, this dumps 52/// the specified string in the output .s file. This capability is 53/// indicated by the hasRawTextSupport() predicate. 54void MCStreamer::EmitRawText(StringRef String) { 55 errs() << "EmitRawText called on an MCStreamer that doesn't support it, " 56 " something must not be fully mc'ized\n"; 57 abort(); 58} 59 60void MCStreamer::EmitRawText(const Twine &T) { 61 SmallString<128> Str; 62 T.toVector(Str); 63 EmitRawText(Str.str()); 64} 65