ExpandIntegerPowExpressions.h (1142B)
1 // 2 // Copyright 2016 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 // This mutating tree traversal works around a bug in the HLSL compiler optimizer with "pow" that 7 // manifests under the following conditions: 8 // 9 // - If pow() has a literal exponent value 10 // - ... and this value is integer or within 10e-6 of an integer 11 // - ... and it is in {-4, -3, -2, 2, 3, 4, 5, 6, 7, 8} 12 // 13 // The workaround is to replace the pow with a series of multiplies. 14 // See http://anglebug.com/851 15 16 #ifndef COMPILER_TRANSLATOR_TREEOPS_D3D_EXPANDINTEGERPOWEXPRESSIONS_H_ 17 #define COMPILER_TRANSLATOR_TREEOPS_D3D_EXPANDINTEGERPOWEXPRESSIONS_H_ 18 19 #include "common/angleutils.h" 20 21 namespace sh 22 { 23 24 class TCompiler; 25 class TIntermNode; 26 class TSymbolTable; 27 28 [[nodiscard]] bool ExpandIntegerPowExpressions(TCompiler *compiler, 29 TIntermNode *root, 30 TSymbolTable *symbolTable); 31 32 } // namespace sh 33 34 #endif // COMPILER_TRANSLATOR_TREEOPS_D3D_EXPANDINTEGERPOWEXPRESSIONS_H_