contrib/llvm-project/llvm/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                       Align Alignment, 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>, Register, LLT, LLT, int)>;
  34
  35   void splitToValueTypes(MachineIRBuilder &B,
  36                          const ArgInfo &OrigArgInfo,
  37                          unsigned OrigArgIdx,
  38                          SmallVectorImpl<ArgInfo> &SplitArgs,
  39                          const DataLayout &DL,
  40                          CallingConv::ID CallConv,
  41                          SplitArgTy SplitArg) const;
  42
  43   bool lowerReturnVal(MachineIRBuilder &B, const Value *Val,
  44                       ArrayRef<Register> VRegs, MachineInstrBuilder &Ret) const;
  45
  46 public:
  47   AMDGPUCallLowering(const AMDGPUTargetLowering &TLI);
  48
  49   bool lowerReturn(MachineIRBuilder &B, const Value *Val,
  50                    ArrayRef<Register> VRegs) const override;
  51
  52   bool lowerFormalArgumentsKernel(MachineIRBuilder &B, const Function &F,
  53                                   ArrayRef<ArrayRef<Register>> VRegs) const;
  54
  55   bool lowerFormalArguments(MachineIRBuilder &B, const Function &F,
  56                             ArrayRef<ArrayRef<Register>> VRegs) const override;
  57   static CCAssignFn *CCAssignFnForCall(CallingConv::ID CC, bool IsVarArg);
  58   static CCAssignFn *CCAssignFnForReturn(CallingConv::ID CC, bool IsVarArg);
  59 };
  60 } // End of namespace llvm;
  61 #endif