1 /* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef MAPLEBE_INCLUDE_CG_PROEPILOG_H 17 #define MAPLEBE_INCLUDE_CG_PROEPILOG_H 18 #include "cg_phase.h" 19 #include "cgfunc.h" 20 #include "insn.h" 21 22 namespace maplebe { 23 class GenProEpilog { 24 public: GenProEpilog(CGFunc & func)25 explicit GenProEpilog(CGFunc &func) : cgFunc(func) {} 26 27 virtual ~GenProEpilog() = default; 28 Run()29 virtual void Run() {} 30 PhaseName()31 std::string PhaseName() const 32 { 33 return "generateproepilog"; 34 } 35 TailCallOpt()36 virtual bool TailCallOpt() 37 { 38 return false; 39 } 40 NeedProEpilog()41 virtual bool NeedProEpilog() 42 { 43 return true; 44 } 45 46 /* CFI related routines */ GetOffsetFromCFA()47 int64 GetOffsetFromCFA() const 48 { 49 return offsetFromCfa; 50 } 51 52 /* add increment (can be negative) and return the new value */ AddtoOffsetFromCFA(int64 delta)53 int64 AddtoOffsetFromCFA(int64 delta) 54 { 55 offsetFromCfa += delta; 56 return offsetFromCfa; 57 } 58 59 Insn *InsertCFIDefCfaOffset(int32 &cfiOffset, Insn &insertAfter); /* cfiOffset in-out */ 60 61 protected: 62 /* check if the current funtion need stack protect code */ 63 void NeedStackProtect(); 64 /* check if a type include array */ 65 bool IncludeArray(const MIRType &type) const; 66 67 CGFunc &cgFunc; 68 int64 offsetFromCfa = 0; /* SP offset from Call Frame Address */ 69 bool stackProtect = false; 70 }; 71 } /* namespace maplebe */ 72 73 #endif /* MAPLEBE_INCLUDE_CG_PROEPILOG_H */ 74