1 //===- LoopIdiomRecognize.h - Loop Idiom Recognize Pass ---------*- 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 // This pass implements an idiom recognizer that transforms simple loops into a
10 // non-loop form.  In cases that this kicks in, it can be a significant
11 // performance win.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_TRANSFORMS_SCALAR_LOOPIDIOMRECOGNIZE_H
16 #define LLVM_TRANSFORMS_SCALAR_LOOPIDIOMRECOGNIZE_H
17 
18 #include "llvm/Analysis/LoopAnalysisManager.h"
19 #include "llvm/IR/PassManager.h"
20 
21 namespace llvm {
22 
23 class Loop;
24 class LPMUpdater;
25 
26 /// Options to disable Loop Idiom Recognize, which can be shared with other
27 /// passes.
28 struct DisableLIRP {
29   /// When true, the entire pass is disabled.
30   static bool All;
31 
32   /// When true, Memset is disabled.
33   static bool Memset;
34 
35   /// When true, Memcpy is disabled.
36   static bool Memcpy;
37 };
38 
39 /// Performs Loop Idiom Recognize Pass.
40 class LoopIdiomRecognizePass : public PassInfoMixin<LoopIdiomRecognizePass> {
41 public:
42   PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,
43                         LoopStandardAnalysisResults &AR, LPMUpdater &U);
44 };
45 
46 } // end namespace llvm
47 
48 #endif // LLVM_TRANSFORMS_SCALAR_LOOPIDIOMRECOGNIZE_H
49