1 // 2 // Copyright (c) 2012 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 // Contains analysis utilities for dealing with HLSL's lack of support for 7 // the use of intrinsic functions which (implicitly or explicitly) compute 8 // gradients of functions with discontinuities. 9 // 10 11 #ifndef COMPILER_DETECTDISCONTINUITY_H_ 12 #define COMPILER_DETECTDISCONTINUITY_H_ 13 14 #include "compiler/intermediate.h" 15 16 namespace sh 17 { 18 // Checks whether a loop can run for a variable number of iterations 19 class DetectLoopDiscontinuity : public TIntermTraverser 20 { 21 public: 22 bool traverse(TIntermNode *node); 23 24 protected: 25 bool visitBranch(Visit visit, TIntermBranch *node); 26 bool visitLoop(Visit visit, TIntermLoop *loop); 27 bool visitAggregate(Visit visit, TIntermAggregate *node); 28 29 int mLoopDepth; 30 bool mLoopDiscontinuity; 31 }; 32 33 bool containsLoopDiscontinuity(TIntermNode *node); 34 35 // Checks for intrinsic functions which compute gradients 36 class DetectGradientOperation : public TIntermTraverser 37 { 38 public: 39 bool traverse(TIntermNode *node); 40 41 protected: 42 bool visitUnary(Visit visit, TIntermUnary *node); 43 bool visitAggregate(Visit visit, TIntermAggregate *node); 44 45 bool mGradientOperation; 46 }; 47 48 bool containsGradientOperation(TIntermNode *node); 49 50 } 51 52 #endif // COMPILER_DETECTDISCONTINUITY_H_ 53
