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//
// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Contains analysis utilities for dealing with HLSL's lack of support for
// the use of intrinsic functions which (implicitly or explicitly) compute
// gradients of functions with discontinuities.
//
#ifndef COMPILER_DETECTDISCONTINUITY_H_
#define COMPILER_DETECTDISCONTINUITY_H_
#include "compiler/translator/IntermNode.h"
namespace sh
{
// Checks whether a loop can run for a variable number of iterations
class DetectLoopDiscontinuity : public TIntermTraverser
{
public:
bool traverse(TIntermNode *node);
protected:
bool visitBranch(Visit visit, TIntermBranch *node);
bool visitLoop(Visit visit, TIntermLoop *loop);
bool visitAggregate(Visit visit, TIntermAggregate *node);
int mLoopDepth;
bool mLoopDiscontinuity;
};
bool containsLoopDiscontinuity(TIntermNode *node);
// Checks for the existence of any loop
class DetectAnyLoop : public TIntermTraverser
{
public:
bool traverse(TIntermNode *node);
protected:
bool visitBinary(Visit, TIntermBinary *);
bool visitUnary(Visit, TIntermUnary *);
bool visitSelection(Visit, TIntermSelection *);
bool visitAggregate(Visit, TIntermAggregate *);
bool visitLoop(Visit, TIntermLoop *);
bool visitBranch(Visit, TIntermBranch *);
bool mHasLoop;
};
bool containsAnyLoop(TIntermNode *node);
// Checks for intrinsic functions which compute gradients
class DetectGradientOperation : public TIntermTraverser
{
public:
bool traverse(TIntermNode *node);
protected:
bool visitUnary(Visit visit, TIntermUnary *node);
bool visitAggregate(Visit visit, TIntermAggregate *node);
bool mGradientOperation;
};
bool containsGradientOperation(TIntermNode *node);
}
#endif // COMPILER_DETECTDISCONTINUITY_H_
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