1 //===- SimplifyCFGOptions.h - Control structure for SimplifyCFG -*- 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 // A set of parameters used to control the transforms in the SimplifyCFG pass. 10 // Options may change depending on the position in the optimization pipeline. 11 // For example, canonical form that includes switches and branches may later be 12 // replaced by lookup tables and selects. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_TRANSFORMS_UTILS_SIMPLIFYCFGOPTIONS_H 17 #define LLVM_TRANSFORMS_UTILS_SIMPLIFYCFGOPTIONS_H 18 19 namespace llvm { 20 21 class AssumptionCache; 22 23 struct SimplifyCFGOptions { 24 int BonusInstThreshold = 1; 25 bool ForwardSwitchCondToPhi = false; 26 bool ConvertSwitchRangeToICmp = false; 27 bool ConvertSwitchToLookupTable = false; 28 bool NeedCanonicalLoop = true; 29 bool HoistCommonInsts = false; 30 bool HoistLoadsStoresWithCondFaulting = false; 31 bool SinkCommonInsts = false; 32 bool SimplifyCondBranch = true; 33 bool SpeculateBlocks = true; 34 bool SpeculateUnpredictables = false; 35 36 AssumptionCache *AC = nullptr; 37 38 // Support 'builder' pattern to set members by name at construction time. 39 SimplifyCFGOptions &bonusInstThreshold(int I) { 40 BonusInstThreshold = I; 41 return *this; 42 } 43 SimplifyCFGOptions &forwardSwitchCondToPhi(bool B) { 44 ForwardSwitchCondToPhi = B; 45 return *this; 46 } 47 SimplifyCFGOptions &convertSwitchRangeToICmp(bool B) { 48 ConvertSwitchRangeToICmp = B; 49 return *this; 50 } 51 SimplifyCFGOptions &convertSwitchToLookupTable(bool B) { 52 ConvertSwitchToLookupTable = B; 53 return *this; 54 } 55 SimplifyCFGOptions &needCanonicalLoops(bool B) { 56 NeedCanonicalLoop = B; 57 return *this; 58 } 59 SimplifyCFGOptions &hoistCommonInsts(bool B) { 60 HoistCommonInsts = B; 61 return *this; 62 } 63 SimplifyCFGOptions &hoistLoadsStoresWithCondFaulting(bool B) { 64 HoistLoadsStoresWithCondFaulting = B; 65 return *this; 66 } 67 SimplifyCFGOptions &sinkCommonInsts(bool B) { 68 SinkCommonInsts = B; 69 return *this; 70 } 71 SimplifyCFGOptions &setAssumptionCache(AssumptionCache *Cache) { 72 AC = Cache; 73 return *this; 74 } 75 SimplifyCFGOptions &setSimplifyCondBranch(bool B) { 76 SimplifyCondBranch = B; 77 return *this; 78 } 79 80 SimplifyCFGOptions &speculateBlocks(bool B) { 81 SpeculateBlocks = B; 82 return *this; 83 } 84 SimplifyCFGOptions &speculateUnpredictables(bool B) { 85 SpeculateUnpredictables = B; 86 return *this; 87 } 88 }; 89 90 } // namespace llvm 91 92 #endif // LLVM_TRANSFORMS_UTILS_SIMPLIFYCFGOPTIONS_H 93