The Tor Browser / file comparison
comparison: gfx/angle/src/compiler/QualifierAlive.cpp
gfx/angle/src/compiler/QualifierAlive.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:a0b053f1029e |
|---|---|
| 1 // | |
| 2 // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved. | |
| 3 // Use of this source code is governed by a BSD-style license that can be | |
| 4 // found in the LICENSE file. | |
| 5 // | |
| 6 | |
| 7 #include "compiler/intermediate.h" | |
| 8 | |
| 9 class TAliveTraverser : public TIntermTraverser { | |
| 10 public: | |
| 11 TAliveTraverser(TQualifier q) : TIntermTraverser(true, false, false, true), found(false), qualifier(q) | |
| 12 { | |
| 13 } | |
| 14 | |
| 15 bool wasFound() { return found; } | |
| 16 | |
| 17 protected: | |
| 18 bool found; | |
| 19 TQualifier qualifier; | |
| 20 | |
| 21 void visitSymbol(TIntermSymbol*); | |
| 22 bool visitSelection(Visit, TIntermSelection*); | |
| 23 }; | |
| 24 | |
| 25 // | |
| 26 // Report whether or not a variable of the given qualifier type | |
| 27 // is guaranteed written. Not always possible to determine if | |
| 28 // it is written conditionally. | |
| 29 // | |
| 30 // ?? It does not do this well yet, this is just a place holder | |
| 31 // that simply determines if it was reference at all, anywhere. | |
| 32 // | |
| 33 bool QualifierWritten(TIntermNode* node, TQualifier qualifier) | |
| 34 { | |
| 35 TAliveTraverser it(qualifier); | |
| 36 | |
| 37 if (node) | |
| 38 node->traverse(&it); | |
| 39 | |
| 40 return it.wasFound(); | |
| 41 } | |
| 42 | |
| 43 void TAliveTraverser::visitSymbol(TIntermSymbol* node) | |
| 44 { | |
| 45 // | |
| 46 // If it's what we're looking for, record it. | |
| 47 // | |
| 48 if (node->getQualifier() == qualifier) | |
| 49 found = true; | |
| 50 } | |
| 51 | |
| 52 bool TAliveTraverser::visitSelection(Visit preVisit, TIntermSelection* node) | |
| 53 { | |
| 54 if (wasFound()) | |
| 55 return false; | |
| 56 | |
| 57 return true; | |
| 58 } |
