1 //===- llvm/lib/Target/X86/X86CallLowering.h - Call lowering ----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// This file describes how to lower LLVM calls to machine code calls.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
16 #define LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
18 #include "llvm/ADT/ArrayRef.h"
19 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
25 class MachineRegisterInfo;
26 class X86TargetLowering;
28 class X86CallLowering : public CallLowering {
30 X86CallLowering(const X86TargetLowering &TLI);
32 bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
33 unsigned VReg) const override;
35 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
36 ArrayRef<unsigned> VRegs) const override;
38 bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv,
39 const MachineOperand &Callee, const ArgInfo &OrigRet,
40 ArrayRef<ArgInfo> OrigArgs) const override;
43 /// A function of this type is used to perform value split action.
44 using SplitArgTy = std::function<void(ArrayRef<unsigned>)>;
46 bool splitToValueTypes(const ArgInfo &OrigArgInfo,
47 SmallVectorImpl<ArgInfo> &SplitArgs,
48 const DataLayout &DL, MachineRegisterInfo &MRI,
49 SplitArgTy SplitArg) const;
52 } // end namespace llvm
54 #endif // LLVM_LIB_TARGET_X86_X86CALLLOWERING_H