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usr / src / contrib / llvm-project / llvm / lib / Target / X86 /

📁 ..
📁 AsmParser
📁 Disassembler
📄 ImmutableGraph.h(15.15 KB)
📁 MCTargetDesc
📁 TargetInfo
📄 X86.h(7.41 KB)
📄 X86.td(68.44 KB)
📄 X86AsmPrinter.cpp(27.18 KB)
📄 X86AsmPrinter.h(5.96 KB)
📄 X86AvoidStoreForwardingBlocks.cpp(27.94 KB)
📄 X86AvoidTrailingCall.cpp(4.91 KB)
📄 X86CallFrameOptimization.cpp(23.07 KB)
📄 X86CallLowering.cpp(17.62 KB)
📄 X86CallLowering.h(1.74 KB)
📄 X86CallingConv.cpp(13.34 KB)
📄 X86CallingConv.h(1.09 KB)
📄 X86CallingConv.td(46.15 KB)
📄 X86CmovConversion.cpp(34.07 KB)
📄 X86CondBrFolding.cpp(18.4 KB)
📄 X86DiscriminateMemOps.cpp(7.11 KB)
📄 X86DomainReassignment.cpp(25.87 KB)
📄 X86EvexToVex.cpp(8.8 KB)
📄 X86ExpandPseudo.cpp(16.95 KB)
📄 X86FastISel.cpp(139.28 KB)
📄 X86FixupBWInsts.cpp(18.09 KB)
📄 X86FixupLEAs.cpp(24.44 KB)
📄 X86FixupSetCC.cpp(4.44 KB)
📄 X86FlagsCopyLowering.cpp(40.36 KB)
📄 X86FloatingPoint.cpp(62.66 KB)
📄 X86FrameLowering.cpp(138.71 KB)
📄 X86FrameLowering.h(11.64 KB)
📄 X86GenRegisterBankInfo.def(3.32 KB)
📄 X86ISelDAGToDAG.cpp(208.37 KB)
📄 X86ISelLowering.cpp(1.94 MB)
📄 X86ISelLowering.h(60.88 KB)
📄 X86IndirectBranchTracking.cpp(6.17 KB)
📄 X86IndirectThunks.cpp(9.78 KB)
📄 X86InsertPrefetch.cpp(9.64 KB)
📄 X86InsertWait.cpp(4.47 KB)
📄 X86Instr3DNow.td(5.24 KB)
📄 X86InstrAMX.td(5.6 KB)
📄 X86InstrAVX512.td(653.76 KB)
📄 X86InstrArithmetic.td(75.61 KB)
📄 X86InstrBuilder.h(8.45 KB)
📄 X86InstrCMovSetCC.td(5.76 KB)
📄 X86InstrCompiler.td(95.78 KB)
📄 X86InstrControl.td(20.53 KB)
📄 X86InstrExtension.td(11.64 KB)
📄 X86InstrFMA.td(33.23 KB)
📄 X86InstrFMA3Info.cpp(6.21 KB)
📄 X86InstrFMA3Info.h(3.25 KB)
📄 X86InstrFPStack.td(39.52 KB)
📄 X86InstrFoldTables.cpp(393.01 KB)
📄 X86InstrFoldTables.h(3.03 KB)
📄 X86InstrFormats.td(41.05 KB)
📄 X86InstrFragmentsSIMD.td(61.14 KB)
📄 X86InstrInfo.cpp(322.72 KB)
📄 X86InstrInfo.h(29.34 KB)
📄 X86InstrInfo.td(169.76 KB)
📄 X86InstrMMX.td(29.55 KB)
📄 X86InstrMPX.td(3.63 KB)
📄 X86InstrSGX.td(1.12 KB)
📄 X86InstrSSE.td(385.01 KB)
📄 X86InstrSVM.td(2.16 KB)
📄 X86InstrShiftRotate.td(49.56 KB)
📄 X86InstrSystem.td(34.03 KB)
📄 X86InstrTSX.td(2.1 KB)
📄 X86InstrVMX.td(3.53 KB)
📄 X86InstrVecCompiler.td(21.09 KB)
📄 X86InstrXOP.td(23.81 KB)
📄 X86InstructionSelector.cpp(61.11 KB)
📄 X86InterleavedAccess.cpp(32.7 KB)
📄 X86IntrinsicsInfo.h(73.96 KB)
📄 X86LegalizerInfo.cpp(15.6 KB)
📄 X86LegalizerInfo.h(1.65 KB)
📄 X86LoadValueInjectionLoadHardening.cpp(32.4 KB)
📄 X86LoadValueInjectionRetHardening.cpp(4.93 KB)
📄 X86MCInstLower.cpp(96.53 KB)
📄 X86MachineFunctionInfo.cpp(1.1 KB)
📄 X86MachineFunctionInfo.h(8.87 KB)
📄 X86MacroFusion.cpp(2.62 KB)
📄 X86MacroFusion.h(992 B)
📄 X86OptimizeLEAs.cpp(27.47 KB)
📄 X86PadShortFunction.cpp(7.33 KB)
📄 X86PartialReduction.cpp(15.46 KB)
📄 X86PfmCounters.td(10.18 KB)
📄 X86RegisterBankInfo.cpp(10.55 KB)
📄 X86RegisterBankInfo.h(2.87 KB)
📄 X86RegisterBanks.td(629 B)
📄 X86RegisterInfo.cpp(29 KB)
📄 X86RegisterInfo.h(5.61 KB)
📄 X86RegisterInfo.td(26.07 KB)
📄 X86SchedBroadwell.td(69.45 KB)
📄 X86SchedHaswell.td(73.96 KB)
📄 X86SchedPredicates.td(4.23 KB)
📄 X86SchedSandyBridge.td(50 KB)
📄 X86SchedSkylakeClient.td(74.65 KB)
📄 X86SchedSkylakeServer.td(113.85 KB)
📄 X86Schedule.td(36.9 KB)
📄 X86ScheduleAtom.td(38.26 KB)
📄 X86ScheduleBdVer2.td(56.78 KB)
📄 X86ScheduleBtVer2.td(46.98 KB)
📄 X86ScheduleSLM.td(22.91 KB)
📄 X86ScheduleZnver1.td(48.97 KB)
📄 X86ScheduleZnver2.td(48.12 KB)
📄 X86SelectionDAGInfo.cpp(12.02 KB)
📄 X86SelectionDAGInfo.h(1.8 KB)
📄 X86ShuffleDecodeConstantPool.cpp(11.22 KB)
📄 X86ShuffleDecodeConstantPool.h(2.13 KB)
📄 X86SpeculativeExecutionSideEffectSuppression.cpp(6.97 KB)
📄 X86SpeculativeLoadHardening.cpp(93.16 KB)
📄 X86Subtarget.cpp(13.25 KB)
📄 X86Subtarget.h(32.08 KB)
📄 X86TargetMachine.cpp(18.88 KB)
📄 X86TargetMachine.h(2.04 KB)
📄 X86TargetObjectFile.cpp(2.61 KB)
📄 X86TargetObjectFile.h(2.13 KB)
📄 X86TargetTransformInfo.cpp(189.14 KB)
📄 X86TargetTransformInfo.h(9.63 KB)
📄 X86VZeroUpper.cpp(12.59 KB)
📄 X86WinAllocaExpander.cpp(9.54 KB)
📄 X86WinEHState.cpp(28.97 KB)

Editing: X86AsmPrinter.h

//===-- X86AsmPrinter.h - X86 implementation of AsmPrinter ------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_X86_X86ASMPRINTER_H
#define LLVM_LIB_TARGET_X86_X86ASMPRINTER_H

#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/FaultMaps.h"
#include "llvm/CodeGen/StackMaps.h"

// Implemented in X86MCInstLower.cpp
namespace {
  class X86MCInstLower;
}

namespace llvm {
class MCCodeEmitter;
class MCStreamer;
class X86Subtarget;
class TargetMachine;

class LLVM_LIBRARY_VISIBILITY X86AsmPrinter : public AsmPrinter {
  const X86Subtarget *Subtarget = nullptr;
  StackMaps SM;
  FaultMaps FM;
  std::unique_ptr<MCCodeEmitter> CodeEmitter;
  bool EmitFPOData = false;
  bool NeedsRetpoline = false;

// This utility class tracks the length of a stackmap instruction's 'shadow'.
  // It is used by the X86AsmPrinter to ensure that the stackmap shadow
  // invariants (i.e. no other stackmaps, patchpoints, or control flow within
  // the shadow) are met, while outputting a minimal number of NOPs for padding.
  //
  // To minimise the number of NOPs used, the shadow tracker counts the number
  // of instruction bytes output since the last stackmap. Only if there are too
  // few instruction bytes to cover the shadow are NOPs used for padding.
  class StackMapShadowTracker {
  public:
    void startFunction(MachineFunction &MF) {
      this->MF = &MF;
    }
    void count(MCInst &Inst, const MCSubtargetInfo &STI,
               MCCodeEmitter *CodeEmitter);

// Called to signal the start of a shadow of RequiredSize bytes.
    void reset(unsigned RequiredSize) {
      RequiredShadowSize = RequiredSize;
      CurrentShadowSize = 0;
      InShadow = true;
    }

// Called before every stackmap/patchpoint, and at the end of basic blocks,
    // to emit any necessary padding-NOPs.
    void emitShadowPadding(MCStreamer &OutStreamer, const MCSubtargetInfo &STI);
  private:
    const MachineFunction *MF = nullptr;
    bool InShadow = false;

// RequiredShadowSize holds the length of the shadow specified in the most
    // recently encountered STACKMAP instruction.
    // CurrentShadowSize counts the number of bytes encoded since the most
    // recently encountered STACKMAP, stopping when that number is greater than
    // or equal to RequiredShadowSize.
    unsigned RequiredShadowSize = 0, CurrentShadowSize = 0;
  };

StackMapShadowTracker SMShadowTracker;

// All instructions emitted by the X86AsmPrinter should use this helper
  // method.
  //
  // This helper function invokes the SMShadowTracker on each instruction before
  // outputting it to the OutStream. This allows the shadow tracker to minimise
  // the number of NOPs used for stackmap padding.
  void EmitAndCountInstruction(MCInst &Inst);
  void LowerSTACKMAP(const MachineInstr &MI);
  void LowerPATCHPOINT(const MachineInstr &MI, X86MCInstLower &MCIL);
  void LowerSTATEPOINT(const MachineInstr &MI, X86MCInstLower &MCIL);
  void LowerFAULTING_OP(const MachineInstr &MI, X86MCInstLower &MCIL);
  void LowerPATCHABLE_OP(const MachineInstr &MI, X86MCInstLower &MCIL);

void LowerTlsAddr(X86MCInstLower &MCInstLowering, const MachineInstr &MI);

// XRay-specific lowering for X86.
  void LowerPATCHABLE_FUNCTION_ENTER(const MachineInstr &MI,
                                     X86MCInstLower &MCIL);
  void LowerPATCHABLE_RET(const MachineInstr &MI, X86MCInstLower &MCIL);
  void LowerPATCHABLE_TAIL_CALL(const MachineInstr &MI, X86MCInstLower &MCIL);
  void LowerPATCHABLE_EVENT_CALL(const MachineInstr &MI, X86MCInstLower &MCIL);
  void LowerPATCHABLE_TYPED_EVENT_CALL(const MachineInstr &MI,
                                       X86MCInstLower &MCIL);

void LowerFENTRY_CALL(const MachineInstr &MI, X86MCInstLower &MCIL);

// Choose between emitting .seh_ directives and .cv_fpo_ directives.
  void EmitSEHInstruction(const MachineInstr *MI);

void PrintSymbolOperand(const MachineOperand &MO, raw_ostream &O) override;
  void PrintOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
  void PrintModifiedOperand(const MachineInstr *MI, unsigned OpNo,
                            raw_ostream &O, const char *Modifier);
  void PrintPCRelImm(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
  void PrintLeaMemReference(const MachineInstr *MI, unsigned OpNo,
                            raw_ostream &O, const char *Modifier);
  void PrintMemReference(const MachineInstr *MI, unsigned OpNo, raw_ostream &O,
                         const char *Modifier);
  void PrintIntelMemReference(const MachineInstr *MI, unsigned OpNo,
                              raw_ostream &O, const char *Modifier);

public:
  X86AsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer);

StringRef getPassName() const override {
    return "X86 Assembly Printer";
  }

const X86Subtarget &getSubtarget() const { return *Subtarget; }

void emitStartOfAsmFile(Module &M) override;

void emitEndOfAsmFile(Module &M) override;

void emitInstruction(const MachineInstr *MI) override;

void emitBasicBlockEnd(const MachineBasicBlock &MBB) override {
    AsmPrinter::emitBasicBlockEnd(MBB);
    SMShadowTracker.emitShadowPadding(*OutStreamer, getSubtargetInfo());
  }

bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
                       const char *ExtraCode, raw_ostream &OS) override;
  bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
                             const char *ExtraCode, raw_ostream &OS) override;

bool doInitialization(Module &M) override {
    SMShadowTracker.reset(0);
    SM.reset();
    FM.reset();
    return AsmPrinter::doInitialization(M);
  }

bool runOnMachineFunction(MachineFunction &F) override;
  void emitFunctionBodyStart() override;
  void emitFunctionBodyEnd() override;
};

} // end namespace llvm

#endif

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