mirror of
https://github.com/RPCS3/llvm-mirror.git
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5bd9b33ade
This reverts commit r259117. The LineInfo constructor is defined in the codeview library and we have to link against it now. Doing that isn't trivial, so reverting for now. llvm-svn: 259126
731 lines
24 KiB
C++
731 lines
24 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/ADT/SmallString.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCSection.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCWin64EH.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/LEB128.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstdlib>
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using namespace llvm;
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// Pin the vtables to this file.
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MCTargetStreamer::~MCTargetStreamer() {}
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MCTargetStreamer::MCTargetStreamer(MCStreamer &S) : Streamer(S) {
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S.setTargetStreamer(this);
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}
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void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
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void MCTargetStreamer::finish() {}
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void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
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MCStreamer::MCStreamer(MCContext &Ctx)
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: Context(Ctx), CurrentWinFrameInfo(nullptr) {
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SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
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}
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MCStreamer::~MCStreamer() {
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for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
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delete WinFrameInfos[i];
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}
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void MCStreamer::reset() {
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DwarfFrameInfos.clear();
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for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
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delete WinFrameInfos[i];
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WinFrameInfos.clear();
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CurrentWinFrameInfo = nullptr;
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SymbolOrdering.clear();
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SectionStack.clear();
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SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
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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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void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
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void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
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for (auto &FI : DwarfFrameInfos)
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FI.CompactUnwindEncoding =
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(MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0);
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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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assert(1 <= Size && Size <= 8 && "Invalid size");
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assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
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"Invalid size");
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char buf[8];
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const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
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for (unsigned i = 0; i != Size; ++i) {
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unsigned index = isLittleEndian ? i : (Size - i - 1);
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buf[i] = uint8_t(Value >> (index * 8));
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}
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EmitBytes(StringRef(buf, Size));
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}
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/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
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/// client having to pass in a MCExpr for constant integers.
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void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
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SmallString<128> Tmp;
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raw_svector_ostream OSE(Tmp);
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encodeULEB128(Value, OSE, Padding);
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EmitBytes(OSE.str());
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}
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/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
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/// client having to pass in a MCExpr for constant integers.
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void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
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SmallString<128> Tmp;
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raw_svector_ostream OSE(Tmp);
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encodeSLEB128(Value, OSE);
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EmitBytes(OSE.str());
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}
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void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size, SMLoc Loc) {
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EmitValueImpl(Value, Size, Loc);
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}
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void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
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bool IsSectionRelative) {
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assert((!IsSectionRelative || Size == 4) &&
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"SectionRelative value requires 4-bytes");
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if (!IsSectionRelative)
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EmitValueImpl(MCSymbolRefExpr::create(Sym, getContext()), Size);
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else
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EmitCOFFSecRel32(Sym);
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}
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void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
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report_fatal_error("unsupported directive in streamer");
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}
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void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
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report_fatal_error("unsupported directive in streamer");
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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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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);
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}
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/// The implementation in this class just redirects to EmitFill.
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void MCStreamer::EmitZeros(uint64_t NumBytes) {
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EmitFill(NumBytes, 0);
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}
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unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
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StringRef Directory,
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StringRef Filename, unsigned CUID) {
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return getContext().getDwarfFile(Directory, Filename, FileNo, CUID);
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}
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void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
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unsigned Column, unsigned Flags,
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unsigned Isa,
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unsigned Discriminator,
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StringRef FileName) {
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getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
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Discriminator);
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}
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MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
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MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
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if (!Table.getLabel()) {
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StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
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Table.setLabel(
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Context.getOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
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}
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return Table.getLabel();
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}
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MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
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if (DwarfFrameInfos.empty())
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return nullptr;
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return &DwarfFrameInfos.back();
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}
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void MCStreamer::EnsureValidDwarfFrame() {
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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if (!CurFrame || CurFrame->End)
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report_fatal_error("No open frame");
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}
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void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
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MCSymbol *EHSymbol) {
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}
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void MCStreamer::InitSections(bool NoExecStack) {
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SwitchSection(getContext().getObjectFileInfo()->getTextSection());
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}
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void MCStreamer::AssignFragment(MCSymbol *Symbol, MCFragment *Fragment) {
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assert(Fragment);
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Symbol->setFragment(Fragment);
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// As we emit symbols into a section, track the order so that they can
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// be sorted upon later. Zero is reserved to mean 'unemitted'.
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SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
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}
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void MCStreamer::EmitLabel(MCSymbol *Symbol) {
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assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
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assert(getCurrentSection().first && "Cannot emit before setting section!");
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assert(!Symbol->getFragment() && "Unexpected fragment on symbol data!");
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Symbol->setFragment(&getCurrentSectionOnly()->getDummyFragment());
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MCTargetStreamer *TS = getTargetStreamer();
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if (TS)
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TS->emitLabel(Symbol);
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}
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void MCStreamer::EmitCFISections(bool EH, bool Debug) {
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assert(EH || Debug);
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}
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void MCStreamer::EmitCFIStartProc(bool IsSimple) {
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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if (CurFrame && !CurFrame->End)
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report_fatal_error("Starting a frame before finishing the previous one!");
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MCDwarfFrameInfo Frame;
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Frame.IsSimple = IsSimple;
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EmitCFIStartProcImpl(Frame);
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const MCAsmInfo* MAI = Context.getAsmInfo();
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if (MAI) {
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for (const MCCFIInstruction& Inst : MAI->getInitialFrameState()) {
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if (Inst.getOperation() == MCCFIInstruction::OpDefCfa ||
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Inst.getOperation() == MCCFIInstruction::OpDefCfaRegister) {
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Frame.CurrentCfaRegister = Inst.getRegister();
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}
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}
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}
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DwarfFrameInfos.push_back(Frame);
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}
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void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
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}
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void MCStreamer::EmitCFIEndProc() {
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EnsureValidDwarfFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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EmitCFIEndProcImpl(*CurFrame);
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}
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void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
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// Put a dummy non-null value in Frame.End to mark that this frame has been
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// closed.
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Frame.End = (MCSymbol *) 1;
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}
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MCSymbol *MCStreamer::EmitCFICommon() {
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EnsureValidDwarfFrame();
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MCSymbol *Label = getContext().createTempSymbol();
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EmitLabel(Label);
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return Label;
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}
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void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createDefCfa(Label, Register, Offset);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
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}
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void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createDefCfaOffset(Label, Offset);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createDefCfaRegister(Label, Register);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
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}
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void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createOffset(Label, Register, Offset);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createRelOffset(Label, Register, Offset);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
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unsigned Encoding) {
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EnsureValidDwarfFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Personality = Sym;
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CurFrame->PersonalityEncoding = Encoding;
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}
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void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
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EnsureValidDwarfFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Lsda = Sym;
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CurFrame->LsdaEncoding = Encoding;
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}
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void MCStreamer::EmitCFIRememberState() {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIRestoreState() {
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// FIXME: Error if there is no matching cfi_remember_state.
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFISameValue(int64_t Register) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createSameValue(Label, Register);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIRestore(int64_t Register) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createRestore(Label, Register);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIEscape(StringRef Values) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIGnuArgsSize(int64_t Size) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createGnuArgsSize(Label, Size);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFISignalFrame() {
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EnsureValidDwarfFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->IsSignalFrame = true;
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}
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void MCStreamer::EmitCFIUndefined(int64_t Register) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createUndefined(Label, Register);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createRegister(Label, Register1, Register2);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EmitCFIWindowSave() {
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MCSymbol *Label = EmitCFICommon();
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MCCFIInstruction Instruction =
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MCCFIInstruction::createWindowSave(Label);
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MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
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CurFrame->Instructions.push_back(Instruction);
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}
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void MCStreamer::EnsureValidWinFrameInfo() {
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const MCAsmInfo *MAI = Context.getAsmInfo();
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if (!MAI->usesWindowsCFI())
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report_fatal_error(".seh_* directives are not supported on this target");
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if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End)
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report_fatal_error("No open Win64 EH frame function!");
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}
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void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
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const MCAsmInfo *MAI = Context.getAsmInfo();
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if (!MAI->usesWindowsCFI())
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report_fatal_error(".seh_* directives are not supported on this target");
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if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
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report_fatal_error("Starting a function before ending the previous one!");
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MCSymbol *StartProc = getContext().createTempSymbol();
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EmitLabel(StartProc);
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WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc));
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CurrentWinFrameInfo = WinFrameInfos.back();
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}
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void MCStreamer::EmitWinCFIEndProc() {
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EnsureValidWinFrameInfo();
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if (CurrentWinFrameInfo->ChainedParent)
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report_fatal_error("Not all chained regions terminated!");
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MCSymbol *Label = getContext().createTempSymbol();
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EmitLabel(Label);
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CurrentWinFrameInfo->End = Label;
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}
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void MCStreamer::EmitWinCFIStartChained() {
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EnsureValidWinFrameInfo();
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MCSymbol *StartProc = getContext().createTempSymbol();
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EmitLabel(StartProc);
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WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function,
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StartProc, CurrentWinFrameInfo));
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CurrentWinFrameInfo = WinFrameInfos.back();
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}
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void MCStreamer::EmitWinCFIEndChained() {
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EnsureValidWinFrameInfo();
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if (!CurrentWinFrameInfo->ChainedParent)
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report_fatal_error("End of a chained region outside a chained region!");
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MCSymbol *Label = getContext().createTempSymbol();
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EmitLabel(Label);
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CurrentWinFrameInfo->End = Label;
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CurrentWinFrameInfo =
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const_cast<WinEH::FrameInfo *>(CurrentWinFrameInfo->ChainedParent);
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}
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void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
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bool Except) {
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EnsureValidWinFrameInfo();
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if (CurrentWinFrameInfo->ChainedParent)
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report_fatal_error("Chained unwind areas can't have handlers!");
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CurrentWinFrameInfo->ExceptionHandler = Sym;
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if (!Except && !Unwind)
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report_fatal_error("Don't know what kind of handler this is!");
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if (Unwind)
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CurrentWinFrameInfo->HandlesUnwind = true;
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if (Except)
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|
CurrentWinFrameInfo->HandlesExceptions = true;
|
|
}
|
|
|
|
void MCStreamer::EmitWinEHHandlerData() {
|
|
EnsureValidWinFrameInfo();
|
|
if (CurrentWinFrameInfo->ChainedParent)
|
|
report_fatal_error("Chained unwind areas can't have handlers!");
|
|
}
|
|
|
|
void MCStreamer::EmitSyntaxDirective() {}
|
|
|
|
void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
|
|
EnsureValidWinFrameInfo();
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
|
|
EnsureValidWinFrameInfo();
|
|
if (CurrentWinFrameInfo->LastFrameInst >= 0)
|
|
report_fatal_error("Frame register and offset already specified!");
|
|
if (Offset & 0x0F)
|
|
report_fatal_error("Misaligned frame pointer offset!");
|
|
if (Offset > 240)
|
|
report_fatal_error("Frame offset must be less than or equal to 240!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst =
|
|
Win64EH::Instruction::SetFPReg(Label, Register, Offset);
|
|
CurrentWinFrameInfo->LastFrameInst = CurrentWinFrameInfo->Instructions.size();
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIAllocStack(unsigned Size) {
|
|
EnsureValidWinFrameInfo();
|
|
if (Size == 0)
|
|
report_fatal_error("Allocation size must be non-zero!");
|
|
if (Size & 7)
|
|
report_fatal_error("Misaligned stack allocation!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
|
|
EnsureValidWinFrameInfo();
|
|
if (Offset & 7)
|
|
report_fatal_error("Misaligned saved register offset!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst =
|
|
Win64EH::Instruction::SaveNonVol(Label, Register, Offset);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
|
|
EnsureValidWinFrameInfo();
|
|
if (Offset & 0x0F)
|
|
report_fatal_error("Misaligned saved vector register offset!");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst =
|
|
Win64EH::Instruction::SaveXMM(Label, Register, Offset);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIPushFrame(bool Code) {
|
|
EnsureValidWinFrameInfo();
|
|
if (CurrentWinFrameInfo->Instructions.size() > 0)
|
|
report_fatal_error("If present, PushMachFrame must be the first UOP");
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
|
|
CurrentWinFrameInfo->Instructions.push_back(Inst);
|
|
}
|
|
|
|
void MCStreamer::EmitWinCFIEndProlog() {
|
|
EnsureValidWinFrameInfo();
|
|
|
|
MCSymbol *Label = getContext().createTempSymbol();
|
|
EmitLabel(Label);
|
|
|
|
CurrentWinFrameInfo->PrologEnd = Label;
|
|
}
|
|
|
|
void MCStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {
|
|
}
|
|
|
|
void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
|
|
}
|
|
|
|
void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
|
|
}
|
|
|
|
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
|
|
/// the specified string in the output .s file. This capability is
|
|
/// indicated by the hasRawTextSupport() predicate.
|
|
void MCStreamer::EmitRawTextImpl(StringRef String) {
|
|
errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
|
|
" something must not be fully mc'ized\n";
|
|
abort();
|
|
}
|
|
|
|
void MCStreamer::EmitRawText(const Twine &T) {
|
|
SmallString<128> Str;
|
|
EmitRawTextImpl(T.toStringRef(Str));
|
|
}
|
|
|
|
void MCStreamer::EmitWindowsUnwindTables() {
|
|
}
|
|
|
|
void MCStreamer::Finish() {
|
|
if (!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End)
|
|
report_fatal_error("Unfinished frame!");
|
|
|
|
MCTargetStreamer *TS = getTargetStreamer();
|
|
if (TS)
|
|
TS->finish();
|
|
|
|
FinishImpl();
|
|
}
|
|
|
|
void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
|
|
visitUsedExpr(*Value);
|
|
Symbol->setVariableValue(Value);
|
|
|
|
MCTargetStreamer *TS = getTargetStreamer();
|
|
if (TS)
|
|
TS->emitAssignment(Symbol, Value);
|
|
}
|
|
|
|
void MCTargetStreamer::prettyPrintAsm(MCInstPrinter &InstPrinter, raw_ostream &OS,
|
|
const MCInst &Inst, const MCSubtargetInfo &STI) {
|
|
InstPrinter.printInst(&Inst, OS, "", STI);
|
|
}
|
|
|
|
void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
|
|
}
|
|
|
|
void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
|
|
switch (Expr.getKind()) {
|
|
case MCExpr::Target:
|
|
cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
|
|
break;
|
|
|
|
case MCExpr::Constant:
|
|
break;
|
|
|
|
case MCExpr::Binary: {
|
|
const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
|
|
visitUsedExpr(*BE.getLHS());
|
|
visitUsedExpr(*BE.getRHS());
|
|
break;
|
|
}
|
|
|
|
case MCExpr::SymbolRef:
|
|
visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
|
|
break;
|
|
|
|
case MCExpr::Unary:
|
|
visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
|
|
break;
|
|
}
|
|
}
|
|
|
|
void MCStreamer::EmitInstruction(const MCInst &Inst,
|
|
const MCSubtargetInfo &STI) {
|
|
// Scan for values.
|
|
for (unsigned i = Inst.getNumOperands(); i--;)
|
|
if (Inst.getOperand(i).isExpr())
|
|
visitUsedExpr(*Inst.getOperand(i).getExpr());
|
|
}
|
|
|
|
void MCStreamer::emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo,
|
|
unsigned Size) {
|
|
// Get the Hi-Lo expression.
|
|
const MCExpr *Diff =
|
|
MCBinaryExpr::createSub(MCSymbolRefExpr::create(Hi, Context),
|
|
MCSymbolRefExpr::create(Lo, Context), Context);
|
|
|
|
const MCAsmInfo *MAI = Context.getAsmInfo();
|
|
if (!MAI->doesSetDirectiveSuppressesReloc()) {
|
|
EmitValue(Diff, Size);
|
|
return;
|
|
}
|
|
|
|
// Otherwise, emit with .set (aka assignment).
|
|
MCSymbol *SetLabel = Context.createTempSymbol("set", true);
|
|
EmitAssignment(SetLabel, Diff);
|
|
EmitSymbolValue(SetLabel, Size);
|
|
}
|
|
|
|
void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
|
|
void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
|
|
void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
|
|
void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
|
|
void MCStreamer::EndCOFFSymbolDef() {}
|
|
void MCStreamer::EmitFileDirective(StringRef Filename) {}
|
|
void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
|
|
void MCStreamer::EmitCOFFSymbolType(int Type) {}
|
|
void MCStreamer::emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) {}
|
|
void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
|
|
unsigned ByteAlignment) {}
|
|
void MCStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
|
|
uint64_t Size, unsigned ByteAlignment) {}
|
|
void MCStreamer::ChangeSection(MCSection *, const MCExpr *) {}
|
|
void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
|
|
void MCStreamer::EmitBytes(StringRef Data) {}
|
|
void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) {
|
|
visitUsedExpr(*Value);
|
|
}
|
|
void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
|
|
void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
|
|
void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
|
|
unsigned ValueSize,
|
|
unsigned MaxBytesToEmit) {}
|
|
void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
|
|
unsigned MaxBytesToEmit) {}
|
|
void MCStreamer::emitValueToOffset(const MCExpr *Offset, unsigned char Value) {}
|
|
void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
|
|
void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
|
|
void MCStreamer::FinishImpl() {}
|
|
void MCStreamer::EmitBundleUnlock() {}
|
|
|
|
void MCStreamer::SwitchSection(MCSection *Section, const MCExpr *Subsection) {
|
|
assert(Section && "Cannot switch to a null section!");
|
|
MCSectionSubPair curSection = SectionStack.back().first;
|
|
SectionStack.back().second = curSection;
|
|
if (MCSectionSubPair(Section, Subsection) != curSection) {
|
|
ChangeSection(Section, Subsection);
|
|
SectionStack.back().first = MCSectionSubPair(Section, Subsection);
|
|
assert(!Section->hasEnded() && "Section already ended");
|
|
MCSymbol *Sym = Section->getBeginSymbol();
|
|
if (Sym && !Sym->isInSection())
|
|
EmitLabel(Sym);
|
|
}
|
|
}
|
|
|
|
MCSymbol *MCStreamer::endSection(MCSection *Section) {
|
|
// TODO: keep track of the last subsection so that this symbol appears in the
|
|
// correct place.
|
|
MCSymbol *Sym = Section->getEndSymbol(Context);
|
|
if (Sym->isInSection())
|
|
return Sym;
|
|
|
|
SwitchSection(Section);
|
|
EmitLabel(Sym);
|
|
return Sym;
|
|
}
|