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1 //===- llvm/lib/Target/X86/X86CallLowering.h - Call lowering ----*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 /// \file
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11 /// This file describes how to lower LLVM calls to machine code calls.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #ifndef LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
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16 #define LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
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17
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18 #include "llvm/ADT/ArrayRef.h"
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19 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
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20 #include <functional>
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21
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22 namespace llvm {
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23
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24 class DataLayout;
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25 class MachineRegisterInfo;
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26 class X86TargetLowering;
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27
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28 class X86CallLowering : public CallLowering {
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29 public:
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30 X86CallLowering(const X86TargetLowering &TLI);
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31
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32 bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
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33 unsigned VReg) const override;
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34
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35 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
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36 ArrayRef<unsigned> VRegs) const override;
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37
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38 bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv,
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39 const MachineOperand &Callee, const ArgInfo &OrigRet,
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40 ArrayRef<ArgInfo> OrigArgs) const override;
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41
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42 private:
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43 /// A function of this type is used to perform value split action.
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44 using SplitArgTy = std::function<void(ArrayRef<unsigned>)>;
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45
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46 bool splitToValueTypes(const ArgInfo &OrigArgInfo,
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47 SmallVectorImpl<ArgInfo> &SplitArgs,
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48 const DataLayout &DL, MachineRegisterInfo &MRI,
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49 SplitArgTy SplitArg) const;
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50 };
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51
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52 } // end namespace llvm
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53
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54 #endif // LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
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