85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Twine.h"
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#include <cstdlib>
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using namespace llvm;
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MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), CurSection(0),
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PrevSection(0) {
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}
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MCStreamer::~MCStreamer() {
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}
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raw_ostream &MCStreamer::GetCommentOS() {
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// By default, discard comments.
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return nulls();
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}
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/// EmitIntValue - Special case of EmitValue that avoids the client having to
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/// pass in a MCExpr for constant integers.
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void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
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unsigned AddrSpace) {
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EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace);
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}
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// EmitULEB128Value - Special case of EmitValue that emits a ULEB128 of the
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// Value as the sequence of ULEB128 encoded bytes.
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void MCStreamer::EmitULEB128Value(uint64_t Value, unsigned AddrSpace) {
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SmallString<32> Tmp;
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raw_svector_ostream OS(Tmp);
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MCObjectWriter::EncodeULEB128(Value, OS);
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EmitBytes(OS.str(), AddrSpace);
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}
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// EmitSLEB128Value - Special case of EmitValue that emits a SLEB128 of the
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// Value as the sequence of ULEB128 encoded bytes.
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void MCStreamer::EmitSLEB128Value(int64_t Value, unsigned AddrSpace) {
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SmallString<32> Tmp;
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raw_svector_ostream OS(Tmp);
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MCObjectWriter::EncodeSLEB128(Value, OS);
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EmitBytes(OS.str(), AddrSpace);
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}
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void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
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unsigned AddrSpace) {
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EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace);
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}
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/// EmitFill - Emit NumBytes bytes worth of the value specified by
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/// FillValue. This implements directives such as '.space'.
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void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
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unsigned AddrSpace) {
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const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
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for (uint64_t i = 0, e = NumBytes; i != e; ++i)
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EmitValue(E, 1, AddrSpace);
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}
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/// EmitRawText - If this file is backed by an assembly streamer, this dumps
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/// the specified string in the output .s file. This capability is
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/// indicated by the hasRawTextSupport() predicate.
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void MCStreamer::EmitRawText(StringRef String) {
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errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
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" something must not be fully mc'ized\n";
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abort();
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}
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void MCStreamer::EmitRawText(const Twine &T) {
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SmallString<128> Str;
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T.toVector(Str);
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EmitRawText(Str.str());
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}
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