1 //===-- PPCCallLowering.h - Call lowering for GlobalISel -------*- 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_POWERPC_GISEL_PPCCALLLOWERING_H 15 #define LLVM_LIB_TARGET_POWERPC_GISEL_PPCCALLLOWERING_H 16 17 #include "PPCISelLowering.h" 18 #include "llvm/CodeGen/GlobalISel/CallLowering.h" 19 20 namespace llvm { 21 22 class PPCTargetLowering; 23 24 class PPCCallLowering : public CallLowering { 25 public: 26 PPCCallLowering(const PPCTargetLowering &TLI); 27 28 bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val, 29 ArrayRef<Register> VRegs, FunctionLoweringInfo &FLI, 30 Register SwiftErrorVReg) const override; 31 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F, 32 ArrayRef<ArrayRef<Register>> VRegs, 33 FunctionLoweringInfo &FLI) const override; 34 bool lowerCall(MachineIRBuilder &MIRBuilder, 35 CallLoweringInfo &Info) const override; 36 }; 37 38 class PPCIncomingValueHandler : public CallLowering::IncomingValueHandler { 39 public: PPCIncomingValueHandler(MachineIRBuilder & MIRBuilder,MachineRegisterInfo & MRI)40 PPCIncomingValueHandler(MachineIRBuilder &MIRBuilder, 41 MachineRegisterInfo &MRI) 42 : CallLowering::IncomingValueHandler(MIRBuilder, MRI) {} 43 44 uint64_t StackUsed; 45 46 private: 47 void assignValueToReg(Register ValVReg, Register PhysReg, 48 const CCValAssign &VA) override; 49 50 void assignValueToAddress(Register ValVReg, Register Addr, LLT MemTy, 51 const MachinePointerInfo &MPO, 52 const CCValAssign &VA) override; 53 54 Register getStackAddress(uint64_t Size, int64_t Offset, 55 MachinePointerInfo &MPO, 56 ISD::ArgFlagsTy Flags) override; 57 58 virtual void markPhysRegUsed(unsigned PhysReg) = 0; 59 }; 60 61 class FormalArgHandler : public PPCIncomingValueHandler { 62 63 void markPhysRegUsed(unsigned PhysReg) override; 64 65 public: FormalArgHandler(MachineIRBuilder & MIRBuilder,MachineRegisterInfo & MRI)66 FormalArgHandler(MachineIRBuilder &MIRBuilder, MachineRegisterInfo &MRI) 67 : PPCIncomingValueHandler(MIRBuilder, MRI) {} 68 }; 69 70 } // end namespace llvm 71 72 #endif 73