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2820258583
This patch removes hidden codegen flag -print-schedule effectively reverting the logic originally committed as r300311 (https://llvm.org/viewvc/llvm-project?view=revision&revision=300311). Flag -print-schedule was originally introduced by r300311 to address PR32216 (https://bugs.llvm.org/show_bug.cgi?id=32216). That bug was about adding "Better testing of schedule model instruction latencies/throughputs". These days, we can use llvm-mca to test scheduling models. So there is no longer a need for flag -print-schedule in LLVM. The main use case for PR32216 is now addressed by llvm-mca. Flag -print-schedule is mainly used for debugging purposes, and it is only actually used by x86 specific tests. We already have extensive (latency and throughput) tests under "test/tools/llvm-mca" for X86 processor models. That means, most (if not all) existing -print-schedule tests for X86 are redundant. When flag -print-schedule was first added to LLVM, several files had to be modified; a few APIs gained new arguments (see for example method MCAsmStreamer::EmitInstruction), and MCSubtargetInfo/TargetSubtargetInfo gained a couple of getSchedInfoStr() methods. Method getSchedInfoStr() had to originally work for both MCInst and MachineInstr. The original implmentation of getSchedInfoStr() introduced a subtle layering violation (reported as PR37160 and then fixed/worked-around by r330615). In retrospect, that new API could have been designed more optimally. We can always query MCSchedModel to get the latency and throughput. More importantly, the "sched-info" string should not have been generated by the subtarget. Note, r317782 fixed an issue where "print-schedule" didn't work very well in the presence of inline assembly. That commit is also reverted by this change. Differential Revision: https://reviews.llvm.org/D57244 llvm-svn: 353043
122 lines
3.8 KiB
C++
122 lines
3.8 KiB
C++
//===-------- MipsELFStreamer.cpp - ELF Object Output ---------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "MipsELFStreamer.h"
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#include "MipsOptionRecord.h"
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#include "MipsTargetStreamer.h"
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#include "llvm/BinaryFormat/ELF.h"
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#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCCodeEmitter.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDwarf.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCSymbolELF.h"
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#include "llvm/Support/Casting.h"
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using namespace llvm;
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MipsELFStreamer::MipsELFStreamer(MCContext &Context,
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std::unique_ptr<MCAsmBackend> MAB,
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std::unique_ptr<MCObjectWriter> OW,
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std::unique_ptr<MCCodeEmitter> Emitter)
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: MCELFStreamer(Context, std::move(MAB), std::move(OW),
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std::move(Emitter)) {
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RegInfoRecord = new MipsRegInfoRecord(this, Context);
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MipsOptionRecords.push_back(
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std::unique_ptr<MipsRegInfoRecord>(RegInfoRecord));
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}
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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::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
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Frame.Begin = getContext().createTempSymbol();
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MCELFStreamer::EmitLabel(Frame.Begin);
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}
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MCSymbol *MipsELFStreamer::EmitCFILabel() {
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MCSymbol *Label = getContext().createTempSymbol("cfi", true);
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MCELFStreamer::EmitLabel(Label);
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return Label;
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}
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void MipsELFStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
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Frame.End = getContext().createTempSymbol();
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MCELFStreamer::EmitLabel(Frame.End);
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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 *L : Labels) {
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auto *Label = cast<MCSymbolELF>(L);
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getAssembler().registerSymbol(*Label);
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Label->setOther(ELF::STO_MIPS_MICROMIPS);
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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, SMLoc Loc) {
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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(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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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::EmitIntValue(uint64_t Value, unsigned Size) {
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MCELFStreamer::EmitIntValue(Value, Size);
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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(
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MCContext &Context, std::unique_ptr<MCAsmBackend> MAB,
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std::unique_ptr<MCObjectWriter> OW, std::unique_ptr<MCCodeEmitter> Emitter,
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bool RelaxAll) {
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return new MipsELFStreamer(Context, std::move(MAB), std::move(OW),
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std::move(Emitter));
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}
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