llvm/lib/Target/M68k/GISel/M68kCallLowering.h

   1 //===-- M68kCallLowering.h - Call lowering ----------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 /// \file
  10 /// This file implements the lowering of LLVM calls to machine code calls for
  11 /// GlobalISel.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_LIB_TARGET_M68K_GLSEL_M68KCALLLOWERING_H
  16 #define LLVM_LIB_TARGET_M68K_GLSEL_M68KCALLLOWERING_H
  17
  18 #include "llvm/CodeGen/CallingConvLower.h"
  19 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
  20 #include "llvm/CodeGen/ValueTypes.h"
  21
  22 namespace llvm {
  23
  24 class M68kTargetLowering;
  25 class MachineInstrBuilder;
  26
  27 class M68kCallLowering : public CallLowering {
  28   // TODO: We are only supporting return instruction with no value at this time
  29   // point
  30
  31 public:
  32   M68kCallLowering(const M68kTargetLowering &TLI);
  33
  34   bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val,
  35                    ArrayRef<Register> VRegs, FunctionLoweringInfo &FLI,
  36                    Register SwiftErrorVReg) const override;
  37
  38   bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
  39                             ArrayRef<ArrayRef<Register>> VRegs,
  40                             FunctionLoweringInfo &FLI) const override;
  41
  42   bool lowerCall(MachineIRBuilder &MIRBuilder,
  43                  CallLoweringInfo &Info) const override;
  44
  45   bool enableBigEndian() const override;
  46 };
  47 struct M68kIncomingValueHandler : public CallLowering::IncomingValueHandler {
  48   M68kIncomingValueHandler(MachineIRBuilder &MIRBuilder,
  49                            MachineRegisterInfo &MRI)
  50       : CallLowering::IncomingValueHandler(MIRBuilder, MRI) {}
  51
  52   uint64_t StackUsed;
  53
  54 private:
  55   void assignValueToReg(Register ValVReg, Register PhysReg,
  56                         const CCValAssign &VA) override;
  57
  58   void assignValueToAddress(Register ValVReg, Register Addr, LLT MemTy,
  59                             const MachinePointerInfo &MPO,
  60                             const CCValAssign &VA) override;
  61
  62   Register getStackAddress(uint64_t Size, int64_t Offset,
  63                            MachinePointerInfo &MPO,
  64                            ISD::ArgFlagsTy Flags) override;
  65 };
  66 } // end namespace llvm
  67
  68 #endif // LLVM_LIB_TARGET_M68K_GLSEL_M68KCALLLOWERING_H