1//===- llvm/lib/Target/X86/X86CallLowering.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_X86_X86CALLLOWERING_H
15#define LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
16
17#include "llvm/CodeGen/GlobalISel/CallLowering.h"
18#include <functional>
19
20namespace llvm {
21
22template <typename T> class ArrayRef;
23class DataLayout;
24class MachineRegisterInfo;
25class X86TargetLowering;
26
27class X86CallLowering : public CallLowering {
28public:
29  X86CallLowering(const X86TargetLowering &TLI);
30
31  bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val,
32                   ArrayRef<Register> VRegs) const override;
33
34  bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
35                            ArrayRef<ArrayRef<Register>> VRegs) const override;
36
37  bool lowerCall(MachineIRBuilder &MIRBuilder,
38                 CallLoweringInfo &Info) const override;
39
40private:
41  /// A function of this type is used to perform value split action.
42  using SplitArgTy = std::function<void(ArrayRef<Register>)>;
43
44  bool splitToValueTypes(const ArgInfo &OrigArgInfo,
45                         SmallVectorImpl<ArgInfo> &SplitArgs,
46                         const DataLayout &DL, MachineRegisterInfo &MRI,
47                         SplitArgTy SplitArg) const;
48};
49
50} // end namespace llvm
51
52#endif // LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
53