MCStreamer.cpp revision 6cde3e6e993126df756e3be5b9ef43540b904644 
1//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/MC/MCStreamer.h"
11#include "llvm/MC/MCExpr.h"
12#include "llvm/Support/raw_ostream.h"
13using namespace llvm;
14
15MCStreamer::MCStreamer(MCContext &_Context) : Context(_Context), CurSection(0) {
16}
17
18MCStreamer::~MCStreamer() {
19}
20
21raw_ostream &MCStreamer::GetCommentOS() {
22  // By default, discard comments.
23  return nulls();
24}
25
26
27/// EmitIntValue - Special case of EmitValue that avoids the client having to
28/// pass in a MCExpr for constant integers.
29void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
30                              unsigned AddrSpace) {
31  EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace);
32}
33
34void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
35                                 unsigned AddrSpace) {
36  EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace);
37}
38
39/// EmitFill - Emit NumBytes bytes worth of the value specified by
40/// FillValue.  This implements directives such as '.space'.
41void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
42                          unsigned AddrSpace) {
43  const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
44  for (uint64_t i = 0, e = NumBytes; i != e; ++i)
45    EmitValue(E, 1, AddrSpace);
46}
47