contrib/llvm/lib/Target/X86/X86CallLowering.h

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