// // Copyright (C) 2002-2005 3Dlabs Inc. Ltd. // Copyright (C) 2012-2013 LunarG, Inc. // Copyright (C) 2017 ARM Limited. // Copyright (C) 2018-2020 Google, Inc. // // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions // are met: // // Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // // Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // // Neither the name of 3Dlabs Inc. Ltd. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE // COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE // POSSIBILITY OF SUCH DAMAGE. // #include "localintermediate.h" #include <cmath> #include <cfloat> #include <cstdlib> #include <climits> namespace { usingnamespaceglslang; const double pi = …; } // end anonymous namespace namespace glslang { // // The fold functions see if an operation on a constant can be done in place, // without generating run-time code. // // Returns the node to keep using, which may or may not be the node passed in. // // Note: As of version 1.2, all constant operations must be folded. It is // not opportunistic, but rather a semantic requirement. // // // Do folding between a pair of nodes. // 'this' is the left-hand operand and 'rightConstantNode' is the right-hand operand. // // Returns a new node representing the result. // TIntermTyped* TIntermConstantUnion::fold(TOperator op, const TIntermTyped* rightConstantNode) const { … } // // Do single unary node folding // // Returns a new node representing the result. // TIntermTyped* TIntermConstantUnion::fold(TOperator op, const TType& returnType) const { … } // // Do constant folding for an aggregate node that has all its children // as constants and an operator that requires constant folding. // TIntermTyped* TIntermediate::fold(TIntermAggregate* aggrNode) { … } bool TIntermediate::areAllChildConst(TIntermAggregate* aggrNode) { … } TIntermTyped* TIntermediate::foldConstructor(TIntermAggregate* aggrNode) { … } // // Constant folding of a bracket (array-style) dereference or struct-like dot // dereference. Can handle anything except a multi-character swizzle, though // all swizzles may go to foldSwizzle(). // TIntermTyped* TIntermediate::foldDereference(TIntermTyped* node, int index, const TSourceLoc& loc) { … } // // Make a constant vector node or constant scalar node, representing a given // constant vector and constant swizzle into it. // TIntermTyped* TIntermediate::foldSwizzle(TIntermTyped* node, TSwizzleSelectors<TVectorSelector>& selectors, const TSourceLoc& loc) { … } } // end namespace glslang
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