lib/Target/AMDGPU/AMDGPUCallLowering.h

   1 //===- lib/Target/AMDGPU/AMDGPUCallLowering.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 describes how to lower LLVM calls to machine code calls.
  11 ///
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUCALLLOWERING_H
  15 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUCALLLOWERING_H
  16
  17 #include "AMDGPU.h"
  18 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
  19
  20 namespace llvm {
  21
  22 class AMDGPUTargetLowering;
  23 class MachineInstrBuilder;
  24
  25 class AMDGPUCallLowering: public CallLowering {
  26   Register lowerParameterPtr(MachineIRBuilder &B, Type *ParamTy,
  27                              uint64_t Offset) const;
  28
  29   void lowerParameter(MachineIRBuilder &B, Type *ParamTy, uint64_t Offset,
  30                       unsigned Align, Register DstReg) const;
  31
  32   /// A function of this type is used to perform value split action.
  33   using SplitArgTy = std::function<void(ArrayRef<Register>, LLT, LLT, int)>;
  34
  35   void splitToValueTypes(const ArgInfo &OrigArgInfo,
  36                          SmallVectorImpl<ArgInfo> &SplitArgs,
  37                          const DataLayout &DL, MachineRegisterInfo &MRI,
  38                          CallingConv::ID CallConv,
  39                          SplitArgTy SplitArg) const;
  40
  41   bool lowerReturnVal(MachineIRBuilder &B, const Value *Val,
  42                       ArrayRef<Register> VRegs, MachineInstrBuilder &Ret) const;
  43
  44 public:
  45   AMDGPUCallLowering(const AMDGPUTargetLowering &TLI);
  46
  47   bool lowerReturn(MachineIRBuilder &B, const Value *Val,
  48                    ArrayRef<Register> VRegs) const override;
  49
  50   bool lowerFormalArgumentsKernel(MachineIRBuilder &B, const Function &F,
  51                                   ArrayRef<ArrayRef<Register>> VRegs) const;
  52
  53   bool lowerFormalArguments(MachineIRBuilder &B, const Function &F,
  54                             ArrayRef<ArrayRef<Register>> VRegs) const override;
  55   static CCAssignFn *CCAssignFnForCall(CallingConv::ID CC, bool IsVarArg);
  56   static CCAssignFn *CCAssignFnForReturn(CallingConv::ID CC, bool IsVarArg);
  57 };
  58 } // End of namespace llvm;
  59 #endif