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
20namespace llvm {
21
22class PPCTargetLowering;
23
24class PPCCallLowering : public CallLowering {
25public:
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
38class PPCIncomingValueHandler : public CallLowering::IncomingValueHandler {
39public:
40 PPCIncomingValueHandler(MachineIRBuilder &MIRBuilder,
41 MachineRegisterInfo &MRI)
42 : CallLowering::IncomingValueHandler(MIRBuilder, MRI) {}
43
44 uint64_t StackUsed;
45
46private:
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
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