llvm/lib/Target/RISCV/GISel/RISCVCallLowering.h

   1 //===-- RISCVCallLowering.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_RISCV_RISCVCALLLOWERING_H
  15 #define LLVM_LIB_TARGET_RISCV_RISCVCALLLOWERING_H
  16
  17 #include "llvm/CodeGen/CallingConvLower.h"
  18 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
  19
  20 namespace llvm {
  21
  22 class MachineInstrBuilder;
  23 class MachineIRBuilder;
  24 class RISCVTargetLowering;
  25
  26 class RISCVCallLowering : public CallLowering {
  27
  28 public:
  29   RISCVCallLowering(const RISCVTargetLowering &TLI);
  30
  31   bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
  32                    ArrayRef<Register> VRegs,
  33                    FunctionLoweringInfo &FLI) const override;
  34
  35   bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
  36                             ArrayRef<ArrayRef<Register>> VRegs,
  37                             FunctionLoweringInfo &FLI) const override;
  38
  39   bool lowerCall(MachineIRBuilder &MIRBuilder,
  40                  CallLoweringInfo &Info) const override;
  41
  42 private:
  43   bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val,
  44                       ArrayRef<Register> VRegs, MachineInstrBuilder &Ret) const;
  45
  46   void saveVarArgRegisters(MachineIRBuilder &MIRBuilder,
  47                            CallLowering::IncomingValueHandler &Handler,
  48                            IncomingValueAssigner &Assigner,
  49                            CCState &CCInfo) const;
  50 };
  51
  52 } // end namespace llvm
  53
  54 #endif // LLVM_LIB_TARGET_RISCV_RISCVCALLLOWERING_H