ARMCallLowering.h revision 360784 
1//===- llvm/lib/Target/ARM/ARMCallLowering.h - Call lowering ----*- 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_ARM_ARMCALLLOWERING_H
15#define LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H
16
17#include "llvm/ADT/ArrayRef.h"
18#include "llvm/CodeGen/GlobalISel/CallLowering.h"
19#include "llvm/IR/CallingConv.h"
20#include <cstdint>
21#include <functional>
22
23namespace llvm {
24
25class ARMTargetLowering;
26class MachineFunction;
27class MachineInstrBuilder;
28class MachineIRBuilder;
29class Value;
30
31class ARMCallLowering : public CallLowering {
32public:
33  ARMCallLowering(const ARMTargetLowering &TLI);
34
35  bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val,
36                   ArrayRef<Register> VRegs) const override;
37
38  bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
39                            ArrayRef<ArrayRef<Register>> VRegs) const override;
40
41  bool lowerCall(MachineIRBuilder &MIRBuilder,
42                 CallLoweringInfo &Info) const override;
43
44private:
45  bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val,
46                      ArrayRef<Register> VRegs,
47                      MachineInstrBuilder &Ret) const;
48
49  /// Split an argument into one or more arguments that the CC lowering can cope
50  /// with.
51  void splitToValueTypes(const ArgInfo &OrigArg,
52                         SmallVectorImpl<ArgInfo> &SplitArgs,
53                         MachineFunction &MF) const;
54};
55
56} // end namespace llvm
57
58#endif // LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H
59