Diego Caballero | 3587150 | 2018-07-31 01:57:29 +0000 | [diff] [blame] | 1 | //===-- VPLoopInfo.h --------------------------------------------*- C++ -*-===// |
| 2 | // |
Chandler Carruth | 2946cd7 | 2019-01-19 08:50:56 +0000 | [diff] [blame] | 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 |
Diego Caballero | 3587150 | 2018-07-31 01:57:29 +0000 | [diff] [blame] | 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | /// |
| 9 | /// \file |
| 10 | /// This file defines VPLoopInfo analysis and VPLoop class. VPLoopInfo is a |
| 11 | /// specialization of LoopInfoBase for VPBlockBase. VPLoops is a specialization |
| 12 | /// of LoopBase that is used to hold loop metadata from VPLoopInfo. Further |
| 13 | /// information can be found in VectorizationPlanner.rst. |
| 14 | /// |
| 15 | //===----------------------------------------------------------------------===// |
| 16 | |
| 17 | #ifndef LLVM_TRANSFORMS_VECTORIZE_VPLOOPINFO_H |
| 18 | #define LLVM_TRANSFORMS_VECTORIZE_VPLOOPINFO_H |
| 19 | |
| 20 | #include "llvm/Analysis/LoopInfoImpl.h" |
| 21 | |
| 22 | namespace llvm { |
| 23 | class VPBlockBase; |
| 24 | |
| 25 | /// Hold analysis information for every loop detected by VPLoopInfo. It is an |
| 26 | /// instantiation of LoopBase. |
| 27 | class VPLoop : public LoopBase<VPBlockBase, VPLoop> { |
| 28 | private: |
| 29 | friend class LoopInfoBase<VPBlockBase, VPLoop>; |
| 30 | explicit VPLoop(VPBlockBase *VPB) : LoopBase<VPBlockBase, VPLoop>(VPB) {} |
| 31 | }; |
| 32 | |
| 33 | /// VPLoopInfo provides analysis of natural loop for VPBlockBase-based |
| 34 | /// Hierarchical CFG. It is a specialization of LoopInfoBase class. |
| 35 | // TODO: VPLoopInfo is initially computed on top of the VPlan plain CFG, which |
| 36 | // is the same as the incoming IR CFG. If it's more efficient than running the |
| 37 | // whole loop detection algorithm, we may want to create a mechanism to |
| 38 | // translate LoopInfo into VPLoopInfo. However, that would require significant |
| 39 | // changes in LoopInfoBase class. |
| 40 | typedef LoopInfoBase<VPBlockBase, VPLoop> VPLoopInfo; |
| 41 | |
| 42 | } // namespace llvm |
| 43 | |
| 44 | #endif // LLVM_TRANSFORMS_VECTORIZE_VPLOOPINFO_H |