LLVM  10.0.0svn
VPlanLoopInfo.h
Go to the documentation of this file.
1 //===-- VPLoopInfo.h --------------------------------------------*- 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 /// \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 
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:
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.
41 
42 } // namespace llvm
43 
44 #endif // LLVM_TRANSFORMS_VECTORIZE_VPLOOPINFO_H
This class represents lattice values for constants.
Definition: AllocatorList.h:23
Instances of this class are used to represent loops that are detected in the flow graph...
Definition: LoopInfo.h:65
Hold analysis information for every loop detected by VPLoopInfo.
Definition: VPlanLoopInfo.h:27
VPBlockBase is the building block of the Hierarchical Control-Flow Graph.
Definition: VPlan.h:333
LoopInfoBase< VPBlockBase, VPLoop > VPLoopInfo
VPLoopInfo provides analysis of natural loop for VPBlockBase-based Hierarchical CFG.
Definition: VPlanLoopInfo.h:40
This class builds and contains all of the top-level loop structures in the specified function...
Definition: LoopInfo.h:64