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e7d84301cc
Summary: This assembler directive marks the current label as an instruction label in microMIPS and MIPS16. This initial implementation works only for microMIPS. Reviewers: dsanders Reviewed By: dsanders Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D8006 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235084 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
//===-------- MipsELFStreamer.cpp - ELF Object 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 "MipsELFStreamer.h"
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#include "MipsTargetStreamer.h"
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#include "llvm/MC/MCELF.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/Support/ELF.h"
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using namespace llvm;
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void MipsELFStreamer::EmitInstruction(const MCInst &Inst,
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const MCSubtargetInfo &STI) {
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MCELFStreamer::EmitInstruction(Inst, STI);
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MCContext &Context = getContext();
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const MCRegisterInfo *MCRegInfo = Context.getRegisterInfo();
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for (unsigned OpIndex = 0; OpIndex < Inst.getNumOperands(); ++OpIndex) {
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const MCOperand &Op = Inst.getOperand(OpIndex);
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if (!Op.isReg())
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continue;
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unsigned Reg = Op.getReg();
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RegInfoRecord->SetPhysRegUsed(Reg, MCRegInfo);
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}
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createPendingLabelRelocs();
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}
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void MipsELFStreamer::createPendingLabelRelocs() {
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MipsTargetELFStreamer *ELFTargetStreamer =
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static_cast<MipsTargetELFStreamer *>(getTargetStreamer());
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// FIXME: Also mark labels when in MIPS16 mode.
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if (ELFTargetStreamer->isMicroMipsEnabled()) {
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for (auto Label : Labels) {
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MCSymbolData &Data = getOrCreateSymbolData(Label);
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// The "other" values are stored in the last 6 bits of the second byte.
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// The traditional defines for STO values assume the full byte and thus
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// the shift to pack it.
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MCELF::setOther(Data, ELF::STO_MIPS_MICROMIPS >> 2);
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}
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}
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Labels.clear();
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}
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void MipsELFStreamer::EmitLabel(MCSymbol *Symbol) {
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MCELFStreamer::EmitLabel(Symbol);
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Labels.push_back(Symbol);
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}
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void MipsELFStreamer::SwitchSection(const MCSection * Section,
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const MCExpr *Subsection) {
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MCELFStreamer::SwitchSection(Section, Subsection);
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Labels.clear();
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}
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void MipsELFStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
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const SMLoc &Loc) {
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MCELFStreamer::EmitValueImpl(Value, Size, Loc);
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Labels.clear();
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}
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void MipsELFStreamer::EmitMipsOptionRecords() {
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for (const auto &I : MipsOptionRecords)
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I->EmitMipsOptionRecord();
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}
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MCELFStreamer *llvm::createMipsELFStreamer(MCContext &Context,
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MCAsmBackend &MAB,
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raw_pwrite_stream &OS,
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MCCodeEmitter *Emitter,
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bool RelaxAll) {
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return new MipsELFStreamer(Context, MAB, OS, Emitter);
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}
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