SimplifyCFGOptions.h

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//===- SimplifyCFGOptions.h - Control structure for SimplifyCFG -*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// A set of parameters used to control the transforms in the SimplifyCFG pass.
// Options may change depending on the position in the optimization pipeline.
// For example, canonical form that includes switches and branches may later be
// replaced by lookup tables and selects.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_TRANSFORMS_UTILS_SIMPLIFYCFGOPTIONS_H
#define LLVM_TRANSFORMS_UTILS_SIMPLIFYCFGOPTIONS_H
 
namespace llvm {
 
class AssumptionCache;
 
struct SimplifyCFGOptions {
  int BonusInstThreshold = 1;
  bool ForwardSwitchCondToPhi = false;
  bool ConvertSwitchToLookupTable = false;
  bool NeedCanonicalLoop = true;
  bool HoistCommonInsts = false;
  bool SinkCommonInsts = false;
  bool SimplifyCondBranch = true;
  bool FoldTwoEntryPHINode = true;
 
  AssumptionCache *AC = nullptr;
 
  // Support 'builder' pattern to set members by name at construction time.
  SimplifyCFGOptions &bonusInstThreshold(int I) {
    BonusInstThreshold = I;
    return *this;
  }
  SimplifyCFGOptions &forwardSwitchCondToPhi(bool B) {
    ForwardSwitchCondToPhi = B;
    return *this;
  }
  SimplifyCFGOptions &convertSwitchToLookupTable(bool B) {
    ConvertSwitchToLookupTable = B;
    return *this;
  }
  SimplifyCFGOptions &needCanonicalLoops(bool B) {
    NeedCanonicalLoop = B;
    return *this;
  }
  SimplifyCFGOptions &hoistCommonInsts(bool B) {
    HoistCommonInsts = B;
    return *this;
  }
  SimplifyCFGOptions &sinkCommonInsts(bool B) {
    SinkCommonInsts = B;
    return *this;
  }
  SimplifyCFGOptions &setAssumptionCache(AssumptionCache *Cache) {
    AC = Cache;
    return *this;
  }
  SimplifyCFGOptions &setSimplifyCondBranch(bool B) {
    SimplifyCondBranch = B;
    return *this;
  }
 
  SimplifyCFGOptions &setFoldTwoEntryPHINode(bool B) {
    FoldTwoEntryPHINode = B;
    return *this;
  }
};
 
} // namespace llvm
 
#endif // LLVM_TRANSFORMS_UTILS_SIMPLIFYCFGOPTIONS_H