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      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 ConvertSwitchToLookupTable = false;
     27   bool NeedCanonicalLoop = true;
     28   bool HoistCommonInsts = false;
     29   bool SinkCommonInsts = false;
     30   bool SimplifyCondBranch = true;
     31   bool FoldTwoEntryPHINode = true;
     32 
     33   AssumptionCache *AC = nullptr;
     34 
     35   // Support 'builder' pattern to set members by name at construction time.
     36   SimplifyCFGOptions &bonusInstThreshold(int I) {
     37     BonusInstThreshold = I;
     38     return *this;
     39   }
     40   SimplifyCFGOptions &forwardSwitchCondToPhi(bool B) {
     41     ForwardSwitchCondToPhi = B;
     42     return *this;
     43   }
     44   SimplifyCFGOptions &convertSwitchToLookupTable(bool B) {
     45     ConvertSwitchToLookupTable = B;
     46     return *this;
     47   }
     48   SimplifyCFGOptions &needCanonicalLoops(bool B) {
     49     NeedCanonicalLoop = B;
     50     return *this;
     51   }
     52   SimplifyCFGOptions &hoistCommonInsts(bool B) {
     53     HoistCommonInsts = B;
     54     return *this;
     55   }
     56   SimplifyCFGOptions &sinkCommonInsts(bool B) {
     57     SinkCommonInsts = B;
     58     return *this;
     59   }
     60   SimplifyCFGOptions &setAssumptionCache(AssumptionCache *Cache) {
     61     AC = Cache;
     62     return *this;
     63   }
     64   SimplifyCFGOptions &setSimplifyCondBranch(bool B) {
     65     SimplifyCondBranch = B;
     66     return *this;
     67   }
     68 
     69   SimplifyCFGOptions &setFoldTwoEntryPHINode(bool B) {
     70     FoldTwoEntryPHINode = B;
     71     return *this;
     72   }
     73 };
     74 
     75 } // namespace llvm
     76 
     77 #endif // LLVM_TRANSFORMS_UTILS_SIMPLIFYCFGOPTIONS_H
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