1 //===- llvm/Transforms/Utils/UnrollLoop.h - Unrolling utilities -*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines some loop unrolling utilities. It does not define any
11 // actual pass or policy, but provides a single function to perform loop
12 // unrolling.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #ifndef LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H
17 #define LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H
18 
19 #include "llvm/ADT/StringRef.h"
20 
21 namespace llvm {
22 
23 class AssumptionCache;
24 class DominatorTree;
25 class Loop;
26 class LoopInfo;
27 class LPPassManager;
28 class MDNode;
29 class Pass;
30 class ScalarEvolution;
31 
32 bool UnrollLoop(Loop *L, unsigned Count, unsigned TripCount, bool AllowRuntime,
33                 bool AllowExpensiveTripCount, unsigned TripMultiple,
34                 LoopInfo *LI, ScalarEvolution *SE, DominatorTree *DT,
35                 AssumptionCache *AC, bool PreserveLCSSA);
36 
37 bool UnrollRuntimeLoopProlog(Loop *L, unsigned Count,
38                              bool AllowExpensiveTripCount, LoopInfo *LI,
39                              ScalarEvolution *SE, DominatorTree *DT,
40                              bool PreserveLCSSA);
41 
42 MDNode *GetUnrollMetadata(MDNode *LoopID, StringRef Name);
43 }
44 
45 #endif
46