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
21namespace llvm {
22
23class PPCTargetLowering;
24
25class PPCCallLowering : public CallLowering {
26public:
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
39class PPCIncomingValueHandler : public CallLowering::IncomingValueHandler {
40public:
41  PPCIncomingValueHandler(MachineIRBuilder &MIRBuilder,
42                          MachineRegisterInfo &MRI)
43      : CallLowering::IncomingValueHandler(MIRBuilder, MRI) {}
44
45  uint64_t StackUsed;
46
47private:
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
61class FormalArgHandler : public PPCIncomingValueHandler {
62
63  void markPhysRegUsed(unsigned PhysReg) override;
64
65public:
66  FormalArgHandler(MachineIRBuilder &MIRBuilder, MachineRegisterInfo &MRI)
67      : PPCIncomingValueHandler(MIRBuilder, MRI) {}
68};
69
70} // end namespace llvm
71
72#endif
73