summaryrefslogtreecommitdiffstats
path: root/gfx/angle/src/compiler/translator/NodeSearch.h
blob: b13b1baabb0801f0c82a409303a6251a4ed22269 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
//
// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// NodeSearch.h: Utilities for searching translator node graphs
//

#ifndef COMPILER_TRANSLATOR_NODESEARCH_H_
#define COMPILER_TRANSLATOR_NODESEARCH_H_

#include "compiler/translator/IntermNode.h"

namespace sh
{

template <class Parent>
class NodeSearchTraverser : public TIntermTraverser
{
  public:
    NodeSearchTraverser()
        : TIntermTraverser(true, false, false),
          mFound(false)
    {}

    bool found() const { return mFound; }

    static bool search(TIntermNode *node)
    {
        Parent searchTraverser;
        node->traverse(&searchTraverser);
        return searchTraverser.found();
    }

  protected:
    bool mFound;
};

class FindDiscard : public NodeSearchTraverser<FindDiscard>
{
  public:
    virtual bool visitBranch(Visit visit, TIntermBranch *node)
    {
        switch (node->getFlowOp())
        {
          case EOpKill:
            mFound = true;
            break;

          default: break;
        }

        return !mFound;
    }
};

}

#endif // COMPILER_TRANSLATOR_NODESEARCH_H_