/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/CodeGen/PBQPRAConstraint.h
Line | Count | Source |
1 | | //===- llvm/CodeGen/PBQPRAConstraint.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 | | // This file defines the PBQPBuilder interface, for classes which build PBQP |
10 | | // instances to represent register allocation problems, and the RegAllocPBQP |
11 | | // interface. |
12 | | // |
13 | | //===----------------------------------------------------------------------===// |
14 | | |
15 | | #ifndef LLVM_CODEGEN_PBQPRACONSTRAINT_H |
16 | | #define LLVM_CODEGEN_PBQPRACONSTRAINT_H |
17 | | |
18 | | #include <algorithm> |
19 | | #include <memory> |
20 | | #include <vector> |
21 | | |
22 | | namespace llvm { |
23 | | |
24 | | namespace PBQP { |
25 | | namespace RegAlloc { |
26 | | |
27 | | // Forward declare PBQP graph class. |
28 | | class PBQPRAGraph; |
29 | | |
30 | | } // end namespace RegAlloc |
31 | | } // end namespace PBQP |
32 | | |
33 | | using PBQPRAGraph = PBQP::RegAlloc::PBQPRAGraph; |
34 | | |
35 | | /// Abstract base for classes implementing PBQP register allocation |
36 | | /// constraints (e.g. Spill-costs, interference, coalescing). |
37 | | class PBQPRAConstraint { |
38 | | public: |
39 | | virtual ~PBQPRAConstraint() = 0; |
40 | | virtual void apply(PBQPRAGraph &G) = 0; |
41 | | |
42 | | private: |
43 | | virtual void anchor(); |
44 | | }; |
45 | | |
46 | | /// PBQP register allocation constraint composer. |
47 | | /// |
48 | | /// Constraints added to this list will be applied, in the order that they are |
49 | | /// added, to the PBQP graph. |
50 | | class PBQPRAConstraintList : public PBQPRAConstraint { |
51 | | public: |
52 | 8 | void apply(PBQPRAGraph &G) override { |
53 | 8 | for (auto &C : Constraints) |
54 | 26 | C->apply(G); |
55 | 8 | } |
56 | | |
57 | 26 | void addConstraint(std::unique_ptr<PBQPRAConstraint> C) { |
58 | 26 | if (C) |
59 | 24 | Constraints.push_back(std::move(C)); |
60 | 26 | } |
61 | | |
62 | | private: |
63 | | std::vector<std::unique_ptr<PBQPRAConstraint>> Constraints; |
64 | | |
65 | | void anchor() override; |
66 | | }; |
67 | | |
68 | | } // end namespace llvm |
69 | | |
70 | | #endif // LLVM_CODEGEN_PBQPRACONSTRAINT_H |