2009-06-24 01:03:06 +00:00
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//===- 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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2010-12-06 17:27:56 +00:00
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#include "llvm/MC/MCAsmInfo.h"
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2010-11-16 21:20:32 +00:00
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#include "llvm/MC/MCContext.h"
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2009-06-24 01:03:06 +00:00
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#include "llvm/MC/MCStreamer.h"
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2010-01-19 18:45:47 +00:00
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#include "llvm/MC/MCExpr.h"
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2010-09-30 16:52:03 +00:00
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#include "llvm/MC/MCObjectWriter.h"
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2011-04-27 15:21:19 +00:00
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#include "llvm/MC/MCSymbol.h"
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2010-11-01 14:28:48 +00:00
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#include "llvm/Support/ErrorHandling.h"
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2010-01-22 19:17:48 +00:00
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#include "llvm/Support/raw_ostream.h"
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2010-04-03 22:12:35 +00:00
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Twine.h"
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2010-04-03 21:48:59 +00:00
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#include <cstdlib>
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2009-06-24 01:03:06 +00:00
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using namespace llvm;
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2011-05-10 01:10:18 +00:00
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MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
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EmitDebugFrame(false) {
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2011-02-21 01:07:42 +00:00
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const MCSection *section = NULL;
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SectionStack.push_back(std::make_pair(section, section));
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2009-06-24 01:03:06 +00:00
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}
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MCStreamer::~MCStreamer() {
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}
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2010-01-19 18:45:47 +00:00
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2011-04-30 03:21:04 +00:00
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const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
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const MCSymbol *A,
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const MCSymbol *B) {
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MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
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const MCExpr *ARef =
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MCSymbolRefExpr::Create(A, Variant, Context);
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const MCExpr *BRef =
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MCSymbolRefExpr::Create(B, Variant, Context);
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const MCExpr *AddrDelta =
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MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
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return AddrDelta;
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}
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const MCExpr *MCStreamer::ForceExpAbs(MCStreamer *Streamer,
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MCContext &Context, const MCExpr* Expr) {
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if (Context.getAsmInfo().hasAggressiveSymbolFolding())
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return Expr;
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MCSymbol *ABS = Context.CreateTempSymbol();
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Streamer->EmitAssignment(ABS, Expr);
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return MCSymbolRefExpr::Create(ABS, Context);
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}
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2010-01-22 19:17:48 +00:00
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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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2010-12-03 00:55:40 +00:00
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void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
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const MCSymbol *Label, int PointerSize) {
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// emit the sequence to set the address
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EmitIntValue(dwarf::DW_LNS_extended_op, 1);
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EmitULEB128IntValue(PointerSize + 1);
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EmitIntValue(dwarf::DW_LNE_set_address, 1);
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EmitSymbolValue(Label, PointerSize);
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// emit the sequence for the LineDelta (from 1) and a zero address delta.
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MCDwarfLineAddr::Emit(this, LineDelta, 0);
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}
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2010-01-22 19:17:48 +00:00
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2010-01-19 22:03:38 +00:00
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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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2010-12-09 19:26:21 +00:00
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assert(Size <= 8 && "Invalid size");
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2010-12-15 23:14:45 +00:00
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assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
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"Invalid size");
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2010-12-03 02:54:21 +00:00
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char buf[8];
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// FIXME: Endianness assumption.
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for (unsigned i = 0; i != Size; ++i)
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buf[i] = uint8_t(Value >> (i * 8));
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EmitBytes(StringRef(buf, Size), AddrSpace);
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2010-01-19 22:03:38 +00:00
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}
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2010-11-02 17:22:24 +00:00
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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 AddrSpace) {
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2010-12-03 01:19:49 +00:00
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SmallString<32> Tmp;
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raw_svector_ostream OSE(Tmp);
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MCObjectWriter::EncodeULEB128(Value, OSE);
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EmitBytes(OSE.str(), AddrSpace);
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2010-09-30 16:52:03 +00:00
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}
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2010-11-02 17:22:24 +00:00
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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, unsigned AddrSpace) {
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2010-12-03 01:19:49 +00:00
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SmallString<32> Tmp;
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raw_svector_ostream OSE(Tmp);
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MCObjectWriter::EncodeSLEB128(Value, OSE);
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EmitBytes(OSE.str(), AddrSpace);
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2010-09-30 16:52:03 +00:00
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}
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2010-12-06 17:27:56 +00:00
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void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
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unsigned AddrSpace) {
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2010-12-22 21:51:29 +00:00
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if (getContext().getAsmInfo().hasAggressiveSymbolFolding()) {
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2010-12-06 17:27:56 +00:00
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EmitValue(Value, Size, AddrSpace);
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return;
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}
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MCSymbol *ABS = getContext().CreateTempSymbol();
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EmitAssignment(ABS, Value);
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EmitSymbolValue(ABS, Size, AddrSpace);
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}
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2010-12-10 07:39:47 +00:00
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void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
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unsigned AddrSpace) {
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2011-05-01 03:50:49 +00:00
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EmitValueImpl(Value, Size, AddrSpace);
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2010-12-10 07:39:47 +00:00
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}
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void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
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2011-05-01 03:50:49 +00:00
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unsigned AddrSpace) {
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EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
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2010-12-10 07:39:47 +00:00
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AddrSpace);
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}
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2010-11-28 15:09:24 +00:00
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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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2010-01-19 18:45:47 +00:00
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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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2010-01-19 19:46:13 +00:00
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void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
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unsigned AddrSpace) {
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2010-01-19 18:45:47 +00:00
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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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2010-01-19 19:46:13 +00:00
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EmitValue(E, 1, AddrSpace);
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2010-01-19 18:45:47 +00:00
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}
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2010-04-03 21:35:55 +00:00
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2010-11-16 21:20:32 +00:00
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bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
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StringRef Filename) {
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return getContext().GetDwarfFile(Filename, FileNo) == 0;
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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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2011-04-18 20:26:49 +00:00
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unsigned Discriminator,
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StringRef FileName) {
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2010-11-16 21:20:32 +00:00
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getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
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Discriminator);
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}
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2010-12-10 07:39:47 +00:00
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MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
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if (FrameInfos.empty())
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return NULL;
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return &FrameInfos.back();
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}
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void MCStreamer::EnsureValidFrame() {
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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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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2011-04-28 12:50:37 +00:00
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void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
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MCSymbol *EHSymbol) {
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}
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2011-04-27 15:21:19 +00:00
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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() && "Cannot emit before setting section!");
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Symbol->setSection(*getCurrentSection());
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StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
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if (!Symbol->getName().startswith(Prefix))
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LastNonPrivate = Symbol;
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}
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2011-05-10 01:10:18 +00:00
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void MCStreamer::EmitCFISections(bool EH, bool Debug) {
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2011-05-10 13:39:48 +00:00
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assert(EH || Debug);
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2011-05-10 01:10:18 +00:00
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EmitEHFrame = EH;
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EmitDebugFrame = Debug;
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}
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2011-04-12 23:59:07 +00:00
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void MCStreamer::EmitCFIStartProc() {
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2010-12-10 07:39:47 +00:00
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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2011-04-12 23:59:07 +00:00
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if (CurFrame && !CurFrame->End)
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2010-12-10 07:39:47 +00:00
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report_fatal_error("Starting a frame before finishing the previous one!");
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2010-12-28 04:15:37 +00:00
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MCDwarfFrameInfo Frame;
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2010-12-10 07:39:47 +00:00
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Frame.Begin = getContext().CreateTempSymbol();
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2011-04-27 15:21:19 +00:00
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Frame.Function = LastNonPrivate;
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2010-12-10 07:39:47 +00:00
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EmitLabel(Frame.Begin);
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FrameInfos.push_back(Frame);
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2010-11-22 14:27:24 +00:00
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}
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2011-04-12 23:59:07 +00:00
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void MCStreamer::EmitCFIEndProc() {
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2010-12-10 07:39:47 +00:00
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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CurFrame->End = getContext().CreateTempSymbol();
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EmitLabel(CurFrame->End);
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2010-11-22 14:27:24 +00:00
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}
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2011-04-12 23:59:07 +00:00
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void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
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2010-12-29 01:42:56 +00:00
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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MCSymbol *Label = getContext().CreateTempSymbol();
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EmitLabel(Label);
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MachineLocation Dest(MachineLocation::VirtualFP);
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MachineLocation Source(Register, -Offset);
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MCCFIInstruction Instruction(Label, Dest, Source);
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CurFrame->Instructions.push_back(Instruction);
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}
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2011-04-12 23:59:07 +00:00
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void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
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2010-12-10 07:39:47 +00:00
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EnsureValidFrame();
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2010-12-28 04:15:37 +00:00
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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MCSymbol *Label = getContext().CreateTempSymbol();
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EmitLabel(Label);
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MachineLocation Dest(MachineLocation::VirtualFP);
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MachineLocation Source(MachineLocation::VirtualFP, -Offset);
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2010-12-28 18:36:23 +00:00
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MCCFIInstruction Instruction(Label, Dest, Source);
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CurFrame->Instructions.push_back(Instruction);
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2010-11-22 14:27:24 +00:00
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}
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2011-04-12 18:53:30 +00:00
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void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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MCSymbol *Label = getContext().CreateTempSymbol();
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EmitLabel(Label);
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MachineLocation Dest(MachineLocation::VirtualFP);
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MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
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MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
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CurFrame->Instructions.push_back(Instruction);
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}
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2011-04-12 23:59:07 +00:00
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void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
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2010-12-10 07:39:47 +00:00
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EnsureValidFrame();
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2010-12-29 00:26:06 +00:00
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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MCSymbol *Label = getContext().CreateTempSymbol();
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EmitLabel(Label);
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MachineLocation Dest(Register);
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MachineLocation Source(MachineLocation::VirtualFP);
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MCCFIInstruction Instruction(Label, Dest, Source);
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CurFrame->Instructions.push_back(Instruction);
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2010-11-22 14:27:24 +00:00
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}
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2011-04-12 23:59:07 +00:00
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void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
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2010-12-10 07:39:47 +00:00
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EnsureValidFrame();
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2010-12-29 00:09:59 +00:00
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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MCSymbol *Label = getContext().CreateTempSymbol();
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EmitLabel(Label);
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MachineLocation Dest(Register, Offset);
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MachineLocation Source(Register, Offset);
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MCCFIInstruction Instruction(Label, Dest, Source);
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CurFrame->Instructions.push_back(Instruction);
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2010-11-22 14:27:24 +00:00
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}
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2011-04-12 16:12:03 +00:00
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void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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MCSymbol *Label = getContext().CreateTempSymbol();
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EmitLabel(Label);
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MachineLocation Dest(Register, Offset);
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MachineLocation Source(Register, Offset);
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MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
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CurFrame->Instructions.push_back(Instruction);
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}
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2011-04-12 23:59:07 +00:00
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void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
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2010-12-27 00:36:05 +00:00
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unsigned Encoding) {
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2010-12-10 07:39:47 +00:00
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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CurFrame->Personality = Sym;
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2010-12-27 00:36:05 +00:00
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CurFrame->PersonalityEncoding = Encoding;
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2010-11-22 14:27:24 +00:00
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}
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2011-04-12 23:59:07 +00:00
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void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
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2010-12-10 07:39:47 +00:00
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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CurFrame->Lsda = Sym;
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2010-12-27 15:56:22 +00:00
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CurFrame->LsdaEncoding = Encoding;
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2010-11-22 14:27:24 +00:00
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}
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2011-04-12 23:59:07 +00:00
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void MCStreamer::EmitCFIRememberState() {
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2010-12-28 18:36:23 +00:00
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EnsureValidFrame();
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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MCSymbol *Label = getContext().CreateTempSymbol();
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|
EmitLabel(Label);
|
|
|
|
MCCFIInstruction Instruction(MCCFIInstruction::Remember, Label);
|
|
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
|
|
}
|
|
|
|
|
2011-04-12 23:59:07 +00:00
|
|
|
void MCStreamer::EmitCFIRestoreState() {
|
2010-12-28 18:36:23 +00:00
|
|
|
// FIXME: Error if there is no matching cfi_remember_state.
|
|
|
|
EnsureValidFrame();
|
|
|
|
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
|
|
|
|
MCSymbol *Label = getContext().CreateTempSymbol();
|
|
|
|
EmitLabel(Label);
|
|
|
|
MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label);
|
|
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
|
|
}
|
|
|
|
|
2011-04-12 15:31:05 +00:00
|
|
|
void MCStreamer::EmitCFISameValue(int64_t Register) {
|
|
|
|
EnsureValidFrame();
|
|
|
|
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
|
|
|
|
MCSymbol *Label = getContext().CreateTempSymbol();
|
|
|
|
EmitLabel(Label);
|
|
|
|
MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
|
|
|
|
CurFrame->Instructions.push_back(Instruction);
|
|
|
|
}
|
|
|
|
|
2011-05-15 17:20:01 +00:00
|
|
|
void MCStreamer::EmitWin64EHFrame(MCSymbol *Symbol, MCSymbol *EHandler = 0)
|
|
|
|
{
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitWin64EHPushReg(int64_t Register)
|
|
|
|
{
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitWin64EHSetFrame(int64_t Register, int64_t Offset)
|
|
|
|
{
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitWin64EHAllocStack(int64_t Size)
|
|
|
|
{
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitWin64EHSaveReg(int64_t Register, int64_t Offset)
|
|
|
|
{
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitWin64EHPushFrame(bool Code)
|
|
|
|
{
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
2011-03-05 18:43:15 +00:00
|
|
|
void MCStreamer::EmitFnStart() {
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitFnEnd() {
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitCantUnwind() {
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitHandlerData() {
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
2011-03-05 18:43:32 +00:00
|
|
|
void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitPad(int64_t Offset) {
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
|
|
|
|
errs() << "Not implemented yet\n";
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
2010-05-20 19:45:09 +00:00
|
|
|
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
|
2010-04-03 21:35:55 +00:00
|
|
|
/// the specified string in the output .s file. This capability is
|
|
|
|
/// indicated by the hasRawTextSupport() predicate.
|
|
|
|
void MCStreamer::EmitRawText(StringRef String) {
|
|
|
|
errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
|
|
|
|
" something must not be fully mc'ized\n";
|
|
|
|
abort();
|
|
|
|
}
|
2010-04-03 22:12:35 +00:00
|
|
|
|
|
|
|
void MCStreamer::EmitRawText(const Twine &T) {
|
|
|
|
SmallString<128> Str;
|
|
|
|
T.toVector(Str);
|
|
|
|
EmitRawText(Str.str());
|
|
|
|
}
|
2011-05-10 03:14:15 +00:00
|
|
|
|
|
|
|
void MCStreamer::EmitFrames(bool usingCFI) {
|
|
|
|
if (!getNumFrameInfos())
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (EmitEHFrame)
|
2011-05-10 03:54:12 +00:00
|
|
|
MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
|
|
|
|
|
|
|
|
if (EmitDebugFrame)
|
|
|
|
MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
|
2011-05-10 03:14:15 +00:00
|
|
|
}
|