ba04210097
Also, add more safety to the types involved regarding copy constructors, operator=, etc. git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@21106 e7fa87d3-cd2b-0410-9028-fcbf551c1848
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
//
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//Copyright (C) 2002-2005 3Dlabs Inc. Ltd.
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//All rights reserved.
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//
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//Redistribution and use in source and binary forms, with or without
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//modification, are permitted provided that the following conditions
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//are met:
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//
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// Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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//
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// Neither the name of 3Dlabs Inc. Ltd. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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//"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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//LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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//FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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//COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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//INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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//BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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//LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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//CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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//LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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//ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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//POSSIBILITY OF SUCH DAMAGE.
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//
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#ifdef USE_QUALIFIER_ALIVE
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#include "../Include/intermediate.h"
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class TAliveTraverser : public TIntermTraverser {
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public:
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TAliveTraverser(TStorageQualifier q) : TIntermTraverser(), found(false), qualifier(q)
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{
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visitSymbol = AliveSymbol;
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visitSelection = AliveSelection;
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rightToLeft = true;
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}
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bool wasFound() { return found; }
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protected:
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bool found;
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TStorageQualifier qualifier;
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friend void AliveSymbol(TIntermSymbol*, TIntermTraverser*);
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friend bool AliveSelection(bool, TIntermSelection*, TIntermTraverser*);
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};
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//
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// Report whether or not a variable of the given qualifier type
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// is guaranteed written. Not always possible to determine if
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// it is written conditionally.
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//
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// It does not do this well yet, this is just a place holder
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// that simply determines if it was reference at all, anywhere.
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//
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bool QualifierWritten(TIntermNode* node, TStorageQualifier qualifier)
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{
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TAliveTraverser it(qualifier);
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if (node)
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node->traverse(&it);
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return it.wasFound();
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}
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void AliveSymbol(TIntermSymbol* node, TIntermTraverser* it)
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{
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TAliveTraverser* lit = static_cast<TAliveTraverser*>(it);
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//
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// If it's what we're looking for, record it.
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//
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if (node->getQualifier().storage == lit->qualifier)
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lit->found = true;
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}
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bool AliveSelection(bool preVisit, TIntermSelection* node, TIntermTraverser* it)
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{
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TAliveTraverser* lit = static_cast<TAliveTraverser*>(it);
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if (lit->wasFound())
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return false;
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return true;
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}
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#endif
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