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//
// Copyright (c) 2010 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.
//
#ifndef COMPILER_TRANSLATOR_VALIDATELIMITATIONS_H_
#define COMPILER_TRANSLATOR_VALIDATELIMITATIONS_H_
#include "compiler/translator/IntermNode.h"
#include "compiler/translator/LoopInfo.h"
class TInfoSinkBase;
// Traverses intermediate tree to ensure that the shader does not exceed the
// minimum functionality mandated in GLSL 1.0 spec, Appendix A.
class ValidateLimitations : public TIntermTraverser
{
public:
ValidateLimitations(sh::GLenum shaderType, TInfoSinkBase *sink);
int numErrors() const { return mNumErrors; }
bool visitBinary(Visit, TIntermBinary *) override;
bool visitUnary(Visit, TIntermUnary *) override;
bool visitAggregate(Visit, TIntermAggregate *) override;
bool visitLoop(Visit, TIntermLoop *) override;
static bool IsLimitedForLoop(TIntermLoop *node);
private:
void error(TSourceLoc loc, const char *reason, const char *token);
bool withinLoopBody() const;
bool isLoopIndex(TIntermSymbol *symbol);
bool validateLoopType(TIntermLoop *node);
bool validateForLoopHeader(TIntermLoop *node);
// If valid, return the index symbol id; Otherwise, return -1.
int validateForLoopInit(TIntermLoop *node);
bool validateForLoopCond(TIntermLoop *node, int indexSymbolId);
bool validateForLoopExpr(TIntermLoop *node, int indexSymbolId);
// Returns true if none of the loop indices is used as the argument to
// the given function out or inout parameter.
bool validateFunctionCall(TIntermAggregate *node);
bool validateOperation(TIntermOperator *node, TIntermNode *operand);
// Returns true if indexing does not exceed the minimum functionality
// mandated in GLSL 1.0 spec, Appendix A, Section 5.
bool isConstExpr(TIntermNode *node);
bool isConstIndexExpr(TIntermNode *node);
bool validateIndexing(TIntermBinary *node);
sh::GLenum mShaderType;
TInfoSinkBase *mSink;
int mNumErrors;
TLoopStack mLoopStack;
bool mValidateIndexing;
bool mValidateInnerLoops;
};
#endif // COMPILER_TRANSLATOR_VALIDATELIMITATIONS_H_
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