1 //===- llvm/lib/Target/ARM/ARMCallLowering.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_ARM_ARMCALLLOWERING_H 15 #define LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H 16 17 #include "llvm/ADT/ArrayRef.h" 18 #include "llvm/CodeGen/GlobalISel/CallLowering.h" 19 #include "llvm/IR/CallingConv.h" 20 #include <cstdint> 21 #include <functional> 22 23 namespace llvm { 24 25 class ARMTargetLowering; 26 class MachineFunction; 27 class MachineInstrBuilder; 28 class MachineIRBuilder; 29 class Value; 30 31 class ARMCallLowering : public CallLowering { 32 public: 33 ARMCallLowering(const ARMTargetLowering &TLI); 34 35 bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val, 36 ArrayRef<Register> VRegs) const override; 37 38 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F, 39 ArrayRef<ArrayRef<Register>> VRegs) const override; 40 41 bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv, 42 const MachineOperand &Callee, const ArgInfo &OrigRet, 43 ArrayRef<ArgInfo> OrigArgs) const override; 44 45 private: 46 bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val, 47 ArrayRef<Register> VRegs, 48 MachineInstrBuilder &Ret) const; 49 50 /// Split an argument into one or more arguments that the CC lowering can cope 51 /// with. 52 void splitToValueTypes(const ArgInfo &OrigArg, 53 SmallVectorImpl<ArgInfo> &SplitArgs, 54 MachineFunction &MF) const; 55 }; 56 57 } // end namespace llvm 58 59 #endif // LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H 60