MCStreamer.cpp revision ab3b3651add0915a5a051b177029ad117a877f52
1a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===// 2a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar// 3a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar// The LLVM Compiler Infrastructure 4a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar// 5a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar// This file is distributed under the University of Illinois Open Source 6a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar// License. See LICENSE.TXT for details. 7a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar// 8a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar//===----------------------------------------------------------------------===// 9a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar 10a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar#include "llvm/MC/MCStreamer.h" 11ddf6bdde44287b5b559bc403a02ff971e15e8303Chris Lattner#include "llvm/MC/MCExpr.h" 12d79d9dce47d505369662ae5111dba24f9ccdef68Chris Lattner#include "llvm/Support/raw_ostream.h" 1358bc4dd4a91443ddd3120b0a2f1801ad4d6aae1cChris Lattner#include "llvm/ADT/SmallString.h" 1458bc4dd4a91443ddd3120b0a2f1801ad4d6aae1cChris Lattner#include "llvm/ADT/Twine.h" 153580dea910d622f2a6dbb72e97f5f7d0ef979542Chris Lattner#include <cstdlib> 16a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbarusing namespace llvm; 17a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar 18dabf07c70a5e13a4560d75667fa5c7db28921a92Chris LattnerMCStreamer::MCStreamer(MCContext &_Context) : Context(_Context), CurSection(0) { 19a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar} 20a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar 21a11af531ec48ad84f790b9511f003ac5c934a999Daniel DunbarMCStreamer::~MCStreamer() { 22a11af531ec48ad84f790b9511f003ac5c934a999Daniel Dunbar} 23ddf6bdde44287b5b559bc403a02ff971e15e8303Chris Lattner 24d79d9dce47d505369662ae5111dba24f9ccdef68Chris Lattnerraw_ostream &MCStreamer::GetCommentOS() { 25d79d9dce47d505369662ae5111dba24f9ccdef68Chris Lattner // By default, discard comments. 26d79d9dce47d505369662ae5111dba24f9ccdef68Chris Lattner return nulls(); 27d79d9dce47d505369662ae5111dba24f9ccdef68Chris Lattner} 28d79d9dce47d505369662ae5111dba24f9ccdef68Chris Lattner 29d79d9dce47d505369662ae5111dba24f9ccdef68Chris Lattner 3032ae3fe0ba469240753e2342e36485f7c9acfb5cChris Lattner/// EmitIntValue - Special case of EmitValue that avoids the client having to 3132ae3fe0ba469240753e2342e36485f7c9acfb5cChris Lattner/// pass in a MCExpr for constant integers. 3232ae3fe0ba469240753e2342e36485f7c9acfb5cChris Lattnervoid MCStreamer::EmitIntValue(uint64_t Value, unsigned Size, 3332ae3fe0ba469240753e2342e36485f7c9acfb5cChris Lattner unsigned AddrSpace) { 3432ae3fe0ba469240753e2342e36485f7c9acfb5cChris Lattner EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace); 3532ae3fe0ba469240753e2342e36485f7c9acfb5cChris Lattner} 3632ae3fe0ba469240753e2342e36485f7c9acfb5cChris Lattner 376cde3e6e993126df756e3be5b9ef43540b904644Chris Lattnervoid MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size, 386cde3e6e993126df756e3be5b9ef43540b904644Chris Lattner unsigned AddrSpace) { 396cde3e6e993126df756e3be5b9ef43540b904644Chris Lattner EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace); 406cde3e6e993126df756e3be5b9ef43540b904644Chris Lattner} 416cde3e6e993126df756e3be5b9ef43540b904644Chris Lattner 42ddf6bdde44287b5b559bc403a02ff971e15e8303Chris Lattner/// EmitFill - Emit NumBytes bytes worth of the value specified by 43ddf6bdde44287b5b559bc403a02ff971e15e8303Chris Lattner/// FillValue. This implements directives such as '.space'. 44aaec205b87637cd0d59d4f11630db603686eb73dChris Lattnervoid MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue, 45aaec205b87637cd0d59d4f11630db603686eb73dChris Lattner unsigned AddrSpace) { 46ddf6bdde44287b5b559bc403a02ff971e15e8303Chris Lattner const MCExpr *E = MCConstantExpr::Create(FillValue, getContext()); 47ddf6bdde44287b5b559bc403a02ff971e15e8303Chris Lattner for (uint64_t i = 0, e = NumBytes; i != e; ++i) 48aaec205b87637cd0d59d4f11630db603686eb73dChris Lattner EmitValue(E, 1, AddrSpace); 49ddf6bdde44287b5b559bc403a02ff971e15e8303Chris Lattner} 5091bead790518fcf5cb26019fb1ebf2372e8a5b3fChris Lattner 51ab3b3651add0915a5a051b177029ad117a877f52Matt Fleming/// EmitRawText - If this file is backed by an assembly streamer, this dumps 5291bead790518fcf5cb26019fb1ebf2372e8a5b3fChris Lattner/// the specified string in the output .s file. This capability is 5391bead790518fcf5cb26019fb1ebf2372e8a5b3fChris Lattner/// indicated by the hasRawTextSupport() predicate. 5491bead790518fcf5cb26019fb1ebf2372e8a5b3fChris Lattnervoid MCStreamer::EmitRawText(StringRef String) { 5591bead790518fcf5cb26019fb1ebf2372e8a5b3fChris Lattner errs() << "EmitRawText called on an MCStreamer that doesn't support it, " 5691bead790518fcf5cb26019fb1ebf2372e8a5b3fChris Lattner " something must not be fully mc'ized\n"; 5791bead790518fcf5cb26019fb1ebf2372e8a5b3fChris Lattner abort(); 5891bead790518fcf5cb26019fb1ebf2372e8a5b3fChris Lattner} 5958bc4dd4a91443ddd3120b0a2f1801ad4d6aae1cChris Lattner 6058bc4dd4a91443ddd3120b0a2f1801ad4d6aae1cChris Lattnervoid MCStreamer::EmitRawText(const Twine &T) { 6158bc4dd4a91443ddd3120b0a2f1801ad4d6aae1cChris Lattner SmallString<128> Str; 6258bc4dd4a91443ddd3120b0a2f1801ad4d6aae1cChris Lattner T.toVector(Str); 6358bc4dd4a91443ddd3120b0a2f1801ad4d6aae1cChris Lattner EmitRawText(Str.str()); 6458bc4dd4a91443ddd3120b0a2f1801ad4d6aae1cChris Lattner} 65