llvm/lib/Target/M68k/GlSel/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
  26 class M68kCallLowering : public CallLowering {
  27   // TODO: We are only supporting return instruction with no value at this time
  28   // point
  29
  30 public:
  31   M68kCallLowering(const M68kTargetLowering &TLI);
  32
  33   bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val,
  34                    ArrayRef<Register> VRegs, FunctionLoweringInfo &FLI,
  35                    Register SwiftErrorVReg) const override;
  36
  37   bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
  38                             ArrayRef<ArrayRef<Register>> VRegs,
  39                             FunctionLoweringInfo &FLI) const override;
  40
  41   bool lowerCall(MachineIRBuilder &MIRBuilder,
  42                  CallLoweringInfo &Info) const override;
  43
  44   bool enableBigEndian() const override;
  45 };
  46 struct M68kIncomingValueHandler : public CallLowering::IncomingValueHandler {
  47   M68kIncomingValueHandler(MachineIRBuilder &MIRBuilder,
  48                            MachineRegisterInfo &MRI)
  49       : CallLowering::IncomingValueHandler(MIRBuilder, MRI) {}
  50
  51   uint64_t StackUsed;
  52
  53 private:
  54   void assignValueToReg(Register ValVReg, Register PhysReg,
  55                         CCValAssign &VA) override;
  56
  57   void assignValueToAddress(Register ValVReg, Register Addr, LLT MemTy,
  58                             MachinePointerInfo &MPO, CCValAssign &VA) override;
  59
  60   Register getStackAddress(uint64_t Size, int64_t Offset,
  61                            MachinePointerInfo &MPO,
  62                            ISD::ArgFlagsTy Flags) override;
  63 };
  64
  65 struct FormalArgHandler : public M68kIncomingValueHandler {
  66   FormalArgHandler(MachineIRBuilder &MIRBuilder, MachineRegisterInfo &MRI)
  67       : M68kIncomingValueHandler(MIRBuilder, MRI) {}
  68 };
  69
  70 } // end namespace llvm
  71
  72 #endif // LLVM_LIB_TARGET_M68K_GLSEL_M68KCALLLOWERING_H