1 //===- lib/Target/AMDGPU/AMDGPUCallLowering.h - Call lowering -*- C++ -*---===//
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
7 //===----------------------------------------------------------------------===//
10 /// This file describes how to lower LLVM calls to machine code calls.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUCALLLOWERING_H
15 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUCALLLOWERING_H
18 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
22 class AMDGPUTargetLowering;
23 class MachineInstrBuilder;
25 class AMDGPUCallLowering: public CallLowering {
26 Register lowerParameterPtr(MachineIRBuilder &B, Type *ParamTy,
27 uint64_t Offset) const;
29 void lowerParameter(MachineIRBuilder &B, Type *ParamTy, uint64_t Offset,
30 Align Alignment, Register DstReg) const;
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)>;
35 void splitToValueTypes(MachineIRBuilder &B,
36 const ArgInfo &OrigArgInfo,
38 SmallVectorImpl<ArgInfo> &SplitArgs,
40 CallingConv::ID CallConv,
41 SplitArgTy SplitArg) const;
43 bool lowerReturnVal(MachineIRBuilder &B, const Value *Val,
44 ArrayRef<Register> VRegs, MachineInstrBuilder &Ret) const;
47 AMDGPUCallLowering(const AMDGPUTargetLowering &TLI);
49 bool lowerReturn(MachineIRBuilder &B, const Value *Val,
50 ArrayRef<Register> VRegs) const override;
52 bool lowerFormalArgumentsKernel(MachineIRBuilder &B, const Function &F,
53 ArrayRef<ArrayRef<Register>> VRegs) const;
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);
60 } // End of namespace llvm;