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 #include "llvm/IR/CallingConv.h" 20 21 namespace llvm { 22 23 class PPCTargetLowering; 24 25 class PPCCallLowering : public CallLowering { 26 public: 27 PPCCallLowering(const PPCTargetLowering &TLI); 28 29 bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val, 30 ArrayRef<Register> VRegs, FunctionLoweringInfo &FLI, 31 Register SwiftErrorVReg) const override; 32 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F, 33 ArrayRef<ArrayRef<Register>> VRegs, 34 FunctionLoweringInfo &FLI) const override; 35 bool lowerCall(MachineIRBuilder &MIRBuilder, 36 CallLoweringInfo &Info) const override; 37 }; 38 39 class PPCIncomingValueHandler : public CallLowering::IncomingValueHandler { 40 public: 41 PPCIncomingValueHandler(MachineIRBuilder &MIRBuilder, 42 MachineRegisterInfo &MRI) 43 : CallLowering::IncomingValueHandler(MIRBuilder, MRI) {} 44 45 uint64_t StackUsed; 46 47 private: 48 void assignValueToReg(Register ValVReg, Register PhysReg, 49 CCValAssign VA) override; 50 51 void assignValueToAddress(Register ValVReg, Register Addr, LLT MemTy, 52 MachinePointerInfo &MPO, 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: 66 FormalArgHandler(MachineIRBuilder &MIRBuilder, MachineRegisterInfo &MRI) 67 : PPCIncomingValueHandler(MIRBuilder, MRI) {} 68 }; 69 70 } // end namespace llvm 71 72 #endif 73