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 
23 namespace llvm {
24 
25 class ARMTargetLowering;
26 class MachineInstrBuilder;
27 class MachineIRBuilder;
28 class Value;
29 
30 class ARMCallLowering : public CallLowering {
31 public:
32   ARMCallLowering(const ARMTargetLowering &TLI);
33 
34   bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val,
35                    ArrayRef<Register> VRegs,
36                    FunctionLoweringInfo &FLI) const override;
37 
38   bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
39                             ArrayRef<ArrayRef<Register>> VRegs,
40                             FunctionLoweringInfo &FLI) const override;
41 
42   bool lowerCall(MachineIRBuilder &MIRBuilder,
43                  CallLoweringInfo &Info) const override;
44 
45 private:
46   bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val,
47                       ArrayRef<Register> VRegs,
48                       MachineInstrBuilder &Ret) const;
49 };
50 
51 } // end namespace llvm
52 
53 #endif // LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H
54