lib/Target/X86/X86CallLowering.h

   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/ADT/ArrayRef.h"
  18 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
  19 #include <functional>
  20
  21 namespace llvm {
  22
  23 class DataLayout;
  24 class MachineRegisterInfo;
  25 class X86TargetLowering;
  26
  27 class X86CallLowering : public CallLowering {
  28 public:
  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, CallingConv::ID CallConv,
  38                  const MachineOperand &Callee, const ArgInfo &OrigRet,
  39                  ArrayRef<ArgInfo> OrigArgs) const override;
  40
  41 private:
  42   /// A function of this type is used to perform value split action.
  43   using SplitArgTy = std::function<void(ArrayRef<Register>)>;
  44
  45   bool splitToValueTypes(const ArgInfo &OrigArgInfo,
  46                          SmallVectorImpl<ArgInfo> &SplitArgs,
  47                          const DataLayout &DL, MachineRegisterInfo &MRI,
  48                          SplitArgTy SplitArg) const;
  49 };
  50
  51 } // end namespace llvm
  52
  53 #endif // LLVM_LIB_TARGET_X86_X86CALLLOWERING_H