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/MCStreamer.h"
11 #include "llvm/MC/MCExpr.h"
12 #include "llvm/MC/MCObjectWriter.h"
13 #include "llvm/Support/ErrorHandling.h"
14 #include "llvm/Support/raw_ostream.h"
15 #include "llvm/ADT/SmallString.h"
16 #include "llvm/ADT/Twine.h"
20 MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), CurSection(0),
24 MCStreamer::~MCStreamer() {
27 raw_ostream &MCStreamer::GetCommentOS() {
28 // By default, discard comments.
33 /// EmitIntValue - Special case of EmitValue that avoids the client having to
34 /// pass in a MCExpr for constant integers.
35 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
37 EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace);
40 // EmitULEB128Value - Special case of EmitValue that emits a ULEB128 of the
41 // Value as the sequence of ULEB128 encoded bytes.
42 void MCStreamer::EmitULEB128Value(uint64_t Value, unsigned AddrSpace) {
44 raw_svector_ostream OS(Tmp);
45 MCObjectWriter::EncodeULEB128(Value, OS);
46 EmitBytes(OS.str(), AddrSpace);
49 // EmitSLEB128Value - Special case of EmitValue that emits a SLEB128 of the
50 // Value as the sequence of ULEB128 encoded bytes.
51 void MCStreamer::EmitSLEB128Value(int64_t Value, unsigned AddrSpace) {
53 raw_svector_ostream OS(Tmp);
54 MCObjectWriter::EncodeSLEB128(Value, OS);
55 EmitBytes(OS.str(), AddrSpace);
58 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
60 EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace);
63 /// EmitFill - Emit NumBytes bytes worth of the value specified by
64 /// FillValue. This implements directives such as '.space'.
65 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
67 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
68 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
69 EmitValue(E, 1, AddrSpace);
72 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
73 /// the specified string in the output .s file. This capability is
74 /// indicated by the hasRawTextSupport() predicate.
75 void MCStreamer::EmitRawText(StringRef String) {
76 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
77 " something must not be fully mc'ized\n";
81 void MCStreamer::EmitRawText(const Twine &T) {
84 EmitRawText(Str.str());