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, 42 CallLoweringInfo &Info) const override; 43 44 private: 45 bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val, 46 ArrayRef<Register> VRegs, 47 MachineInstrBuilder &Ret) const; 48 49 /// Split an argument into one or more arguments that the CC lowering can cope 50 /// with. 51 void splitToValueTypes(const ArgInfo &OrigArg, 52 SmallVectorImpl<ArgInfo> &SplitArgs, 53 MachineFunction &MF) const; 54 }; 55 56 } // end namespace llvm 57 58 #endif // LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H 59