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_AARCH64_AARCH64_ALIGNMENT_H 17 #define MAPLEBE_INCLUDE_CG_AARCH64_AARCH64_ALIGNMENT_H 18 19 #include "alignment.h" 20 #include "aarch64_cgfunc.h" 21 22 namespace maplebe { 23 constexpr uint32 kAlignRegionPower = 4; 24 constexpr uint32 kAlignInsnLength = 4; 25 constexpr uint32 kAlignMaxNopNum = 1; 26 27 struct AArch64AlignInfo { 28 /* if bb size in (16byte, 96byte) , the bb need align */ 29 uint32 alignMinBBSize = 16; 30 uint32 alignMaxBBSize = 96; 31 /* default loop & jump align power, related to the target machine. eg. 2^5 */ 32 uint32 loopAlign = 4; 33 uint32 jumpAlign = 5; 34 /* record func_align_power in CGFunc */ 35 }; 36 37 class AArch64AlignAnalysis : public AlignAnalysis { 38 public: AArch64AlignAnalysis(CGFunc & func,MemPool & memPool,LoopAnalysis & loop)39 AArch64AlignAnalysis(CGFunc &func, MemPool &memPool, LoopAnalysis &loop) : AlignAnalysis(func, memPool, loop) 40 { 41 aarFunc = static_cast<AArch64CGFunc *>(&func); 42 } 43 ~AArch64AlignAnalysis() override = default; 44 45 void FindLoopHeader() override; 46 void FindJumpTarget() override; 47 void ComputeLoopAlign() override; 48 void ComputeJumpAlign() override; 49 void ComputeCondBranchAlign() override; 50 bool MarkShortBranchSplit(); 51 void UpdateInsnId(); 52 uint32 GetAlignRange(uint32 alignedVal, uint32 addr) const; 53 54 /* filter condition */ 55 bool IsIncludeCall(BB &bb) override; 56 bool IsInSizeRange(BB &bb) override; 57 bool HasFallthruEdge(BB &bb) override; 58 bool IsInSameAlignedRegion(uint32 addr1, uint32 addr2, uint32 alignedRegionSize) const; 59 60 private: 61 AArch64CGFunc *aarFunc = nullptr; 62 }; 63 } /* namespace maplebe */ 64 65 #endif /* MAPLEBE_INCLUDE_CG_AARCH64_AARCH64_ALIGNMENT_H */ 66