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 SinkCommonInsts = false;
31   bool SimplifyCondBranch = true;
32   bool FoldTwoEntryPHINode = true;
33 
34   AssumptionCache *AC = nullptr;
35 
36   // Support 'builder' pattern to set members by name at construction time.
bonusInstThresholdSimplifyCFGOptions37   SimplifyCFGOptions &bonusInstThreshold(int I) {
38     BonusInstThreshold = I;
39     return *this;
40   }
forwardSwitchCondToPhiSimplifyCFGOptions41   SimplifyCFGOptions &forwardSwitchCondToPhi(bool B) {
42     ForwardSwitchCondToPhi = B;
43     return *this;
44   }
convertSwitchRangeToICmpSimplifyCFGOptions45   SimplifyCFGOptions &convertSwitchRangeToICmp(bool B) {
46     ConvertSwitchRangeToICmp = B;
47     return *this;
48   }
convertSwitchToLookupTableSimplifyCFGOptions49   SimplifyCFGOptions &convertSwitchToLookupTable(bool B) {
50     ConvertSwitchToLookupTable = B;
51     return *this;
52   }
needCanonicalLoopsSimplifyCFGOptions53   SimplifyCFGOptions &needCanonicalLoops(bool B) {
54     NeedCanonicalLoop = B;
55     return *this;
56   }
hoistCommonInstsSimplifyCFGOptions57   SimplifyCFGOptions &hoistCommonInsts(bool B) {
58     HoistCommonInsts = B;
59     return *this;
60   }
sinkCommonInstsSimplifyCFGOptions61   SimplifyCFGOptions &sinkCommonInsts(bool B) {
62     SinkCommonInsts = B;
63     return *this;
64   }
setAssumptionCacheSimplifyCFGOptions65   SimplifyCFGOptions &setAssumptionCache(AssumptionCache *Cache) {
66     AC = Cache;
67     return *this;
68   }
setSimplifyCondBranchSimplifyCFGOptions69   SimplifyCFGOptions &setSimplifyCondBranch(bool B) {
70     SimplifyCondBranch = B;
71     return *this;
72   }
73 
setFoldTwoEntryPHINodeSimplifyCFGOptions74   SimplifyCFGOptions &setFoldTwoEntryPHINode(bool B) {
75     FoldTwoEntryPHINode = B;
76     return *this;
77   }
78 };
79 
80 } // namespace llvm
81 
82 #endif // LLVM_TRANSFORMS_UTILS_SIMPLIFYCFGOPTIONS_H
83