1 //===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCContext.h"
11 #include "llvm/MC/MCStreamer.h"
12 #include "llvm/MC/MCExpr.h"
13 #include "llvm/MC/MCObjectWriter.h"
14 #include "llvm/Support/ErrorHandling.h"
15 #include "llvm/Support/raw_ostream.h"
16 #include "llvm/ADT/SmallString.h"
17 #include "llvm/ADT/Twine.h"
21 MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), CurSection(0),
25 MCStreamer::~MCStreamer() {
28 raw_ostream &MCStreamer::GetCommentOS() {
29 // By default, discard comments.
34 /// EmitIntValue - Special case of EmitValue that avoids the client having to
35 /// pass in a MCExpr for constant integers.
36 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
38 EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace);
41 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
42 /// client having to pass in a MCExpr for constant integers.
43 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace) {
44 EmitULEB128Value(MCConstantExpr::Create(Value, getContext()), AddrSpace);
47 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
48 /// client having to pass in a MCExpr for constant integers.
49 void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
50 EmitSLEB128Value(MCConstantExpr::Create(Value, getContext()), AddrSpace);
53 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
55 EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace);
58 /// EmitFill - Emit NumBytes bytes worth of the value specified by
59 /// FillValue. This implements directives such as '.space'.
60 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
62 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
63 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
64 EmitValue(E, 1, AddrSpace);
67 bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
69 return getContext().GetDwarfFile(Filename, FileNo) == 0;
72 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
73 unsigned Column, unsigned Flags,
75 unsigned Discriminator) {
76 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
80 bool MCStreamer::EmitCFIStartProc() {
84 bool MCStreamer::EmitCFIEndProc() {
88 bool MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
92 bool MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
96 bool MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
100 bool MCStreamer::EmitCFIPersonality(const MCSymbol *Sym) {
104 bool MCStreamer::EmitCFILsda(const MCSymbol *Sym) {
108 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
109 /// the specified string in the output .s file. This capability is
110 /// indicated by the hasRawTextSupport() predicate.
111 void MCStreamer::EmitRawText(StringRef String) {
112 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
113 " something must not be fully mc'ized\n";
117 void MCStreamer::EmitRawText(const Twine &T) {
118 SmallString<128> Str;
120 EmitRawText(Str.str());