//===- AMDGPULegalizerInfo ---------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
/// \file
/// This file declares the targeting of the Machinelegalizer class for
/// AMDGPU.
/// \todo This should be generated by TableGen.
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUMACHINELEGALIZER_H
#define LLVM_LIB_TARGET_AMDGPU_AMDGPUMACHINELEGALIZER_H

#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
#include "AMDGPUArgumentUsageInfo.h"
#include "SIInstrInfo.h"

namespace llvm {

class GCNTargetMachine;
class LLVMContext;
class GCNSubtarget;

/// This class provides the information for the target register banks.
class AMDGPULegalizerInfo final : public LegalizerInfo {
  const GCNSubtarget &ST;

public:
  AMDGPULegalizerInfo(const GCNSubtarget &ST,
                      const GCNTargetMachine &TM);

  bool legalizeCustom(LegalizerHelper &Helper, MachineInstr &MI) const override;

  Register getSegmentAperture(unsigned AddrSpace,
                              MachineRegisterInfo &MRI,
                              MachineIRBuilder &B) const;

  bool legalizeAddrSpaceCast(MachineInstr &MI, MachineRegisterInfo &MRI,
                             MachineIRBuilder &B) const;
  bool legalizeFrint(MachineInstr &MI, MachineRegisterInfo &MRI,
                     MachineIRBuilder &B) const;
  bool legalizeFceil(MachineInstr &MI, MachineRegisterInfo &MRI,
                     MachineIRBuilder &B) const;
  bool legalizeFrem(MachineInstr &MI, MachineRegisterInfo &MRI,
                    MachineIRBuilder &B) const;
  bool legalizeIntrinsicTrunc(MachineInstr &MI, MachineRegisterInfo &MRI,
                              MachineIRBuilder &B) const;
  bool legalizeITOFP(MachineInstr &MI, MachineRegisterInfo &MRI,
                     MachineIRBuilder &B, bool Signed) const;
  bool legalizeFPTOI(MachineInstr &MI, MachineRegisterInfo &MRI,
                     MachineIRBuilder &B, bool Signed) const;
  bool legalizeMinNumMaxNum(LegalizerHelper &Helper, MachineInstr &MI) const;
  bool legalizeExtractVectorElt(MachineInstr &MI, MachineRegisterInfo &MRI,
                                MachineIRBuilder &B) const;
  bool legalizeInsertVectorElt(MachineInstr &MI, MachineRegisterInfo &MRI,
                               MachineIRBuilder &B) const;
  bool legalizeShuffleVector(MachineInstr &MI, MachineRegisterInfo &MRI,
                             MachineIRBuilder &B) const;

  bool legalizeSinCos(MachineInstr &MI, MachineRegisterInfo &MRI,
                      MachineIRBuilder &B) const;

  bool buildPCRelGlobalAddress(Register DstReg, LLT PtrTy, MachineIRBuilder &B,
                               const GlobalValue *GV, int64_t Offset,
                               unsigned GAFlags = SIInstrInfo::MO_NONE) const;

  bool legalizeGlobalValue(MachineInstr &MI, MachineRegisterInfo &MRI,
                           MachineIRBuilder &B) const;
  bool legalizeLoad(LegalizerHelper &Helper, MachineInstr &MI) const;

  bool legalizeFMad(MachineInstr &MI, MachineRegisterInfo &MRI,
                    MachineIRBuilder &B) const;

  bool legalizeAtomicCmpXChg(MachineInstr &MI, MachineRegisterInfo &MRI,
                             MachineIRBuilder &B) const;
  bool legalizeFlog(MachineInstr &MI, MachineIRBuilder &B,
                    double Log2BaseInverted) const;
  bool legalizeFExp(MachineInstr &MI, MachineIRBuilder &B) const;
  bool legalizeFPow(MachineInstr &MI, MachineIRBuilder &B) const;
  bool legalizeFFloor(MachineInstr &MI, MachineRegisterInfo &MRI,
                      MachineIRBuilder &B) const;

  bool legalizeBuildVector(MachineInstr &MI, MachineRegisterInfo &MRI,
                           MachineIRBuilder &B) const;

  bool loadInputValue(Register DstReg, MachineIRBuilder &B,
                      const ArgDescriptor *Arg,
                      const TargetRegisterClass *ArgRC, LLT ArgTy) const;
  bool loadInputValue(Register DstReg, MachineIRBuilder &B,
                      AMDGPUFunctionArgInfo::PreloadedValue ArgType) const;
  bool legalizePreloadedArgIntrin(
    MachineInstr &MI, MachineRegisterInfo &MRI, MachineIRBuilder &B,
    AMDGPUFunctionArgInfo::PreloadedValue ArgType) const;

  bool legalizeUDIV_UREM(MachineInstr &MI, MachineRegisterInfo &MRI,
                         MachineIRBuilder &B) const;

  void legalizeUDIV_UREM32Impl(MachineIRBuilder &B,
                               Register DstReg, Register Num, Register Den,
                               bool IsRem) const;
  bool legalizeUDIV_UREM32(MachineInstr &MI, MachineRegisterInfo &MRI,
                           MachineIRBuilder &B) const;
  bool legalizeSDIV_SREM32(MachineInstr &MI, MachineRegisterInfo &MRI,
                           MachineIRBuilder &B) const;

  void legalizeUDIV_UREM64Impl(MachineIRBuilder &B,
                               Register DstReg, Register Numer, Register Denom,
                               bool IsDiv) const;

  bool legalizeUDIV_UREM64(MachineInstr &MI, MachineRegisterInfo &MRI,
                           MachineIRBuilder &B) const;
  bool legalizeSDIV_SREM(MachineInstr &MI, MachineRegisterInfo &MRI,
                         MachineIRBuilder &B) const;

  bool legalizeFDIV(MachineInstr &MI, MachineRegisterInfo &MRI,
                    MachineIRBuilder &B) const;
  bool legalizeFDIV16(MachineInstr &MI, MachineRegisterInfo &MRI,
                      MachineIRBuilder &B) const;
  bool legalizeFDIV32(MachineInstr &MI, MachineRegisterInfo &MRI,
                      MachineIRBuilder &B) const;
  bool legalizeFDIV64(MachineInstr &MI, MachineRegisterInfo &MRI,
                      MachineIRBuilder &B) const;
  bool legalizeFastUnsafeFDIV(MachineInstr &MI, MachineRegisterInfo &MRI,
                              MachineIRBuilder &B) const;
  bool legalizeFDIVFastIntrin(MachineInstr &MI, MachineRegisterInfo &MRI,
                              MachineIRBuilder &B) const;

  bool legalizeRsqClampIntrinsic(MachineInstr &MI, MachineRegisterInfo &MRI,
                                 MachineIRBuilder &B) const;

  bool legalizeDSAtomicFPIntrinsic(LegalizerHelper &Helper,
                                   MachineInstr &MI, Intrinsic::ID IID) const;

  bool getImplicitArgPtr(Register DstReg, MachineRegisterInfo &MRI,
                         MachineIRBuilder &B) const;

  bool legalizeImplicitArgPtr(MachineInstr &MI, MachineRegisterInfo &MRI,
                              MachineIRBuilder &B) const;
  bool legalizeIsAddrSpace(MachineInstr &MI, MachineRegisterInfo &MRI,
                           MachineIRBuilder &B, unsigned AddrSpace) const;

  std::tuple<Register, unsigned, unsigned>
  splitBufferOffsets(MachineIRBuilder &B, Register OrigOffset) const;

  Register handleD16VData(MachineIRBuilder &B, MachineRegisterInfo &MRI,
                          Register Reg, bool ImageStore = false) const;
  bool legalizeRawBufferStore(MachineInstr &MI, MachineRegisterInfo &MRI,
                              MachineIRBuilder &B, bool IsFormat) const;
  bool legalizeRawBufferLoad(MachineInstr &MI, MachineRegisterInfo &MRI,
                             MachineIRBuilder &B, bool IsFormat) const;
  Register fixStoreSourceType(MachineIRBuilder &B, Register VData,
                              bool IsFormat) const;

  bool legalizeBufferStore(MachineInstr &MI, MachineRegisterInfo &MRI,
                           MachineIRBuilder &B, bool IsTyped,
                           bool IsFormat) const;
  bool legalizeBufferLoad(MachineInstr &MI, MachineRegisterInfo &MRI,
                          MachineIRBuilder &B, bool IsFormat,
                          bool IsTyped) const;
  bool legalizeBufferAtomic(MachineInstr &MI, MachineIRBuilder &B,
                            Intrinsic::ID IID) const;

  bool legalizeBVHIntrinsic(MachineInstr &MI, MachineIRBuilder &B) const;

  bool legalizeImageIntrinsic(
      MachineInstr &MI, MachineIRBuilder &B,
      GISelChangeObserver &Observer,
      const AMDGPU::ImageDimIntrinsicInfo *ImageDimIntr) const;

  bool legalizeSBufferLoad(LegalizerHelper &Helper, MachineInstr &MI) const;

  bool legalizeAtomicIncDec(MachineInstr &MI,  MachineIRBuilder &B,
                            bool IsInc) const;

  bool legalizeTrapIntrinsic(MachineInstr &MI, MachineRegisterInfo &MRI,
                             MachineIRBuilder &B) const;
  bool legalizeDebugTrapIntrinsic(MachineInstr &MI, MachineRegisterInfo &MRI,
                                  MachineIRBuilder &B) const;

  bool legalizeIntrinsic(LegalizerHelper &Helper,
                         MachineInstr &MI) const override;
};
} // End llvm namespace.
#endif