1 files changed, 68 insertions, 0 deletions
diff --git a/gfx/angle/src/compiler/translator/ValidateLimitations.h b/gfx/angle/src/compiler/translator/ValidateLimitations.h
new file mode 100755
index 000000000..4c84f9db7
--- /dev/null
+++ b/gfx/angle/src/compiler/translator/ValidateLimitations.h
@@ -0,0 +1,68 @@
+//
+// 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"
+
+namespace sh
+{
+
+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;
+};
+
+}  // namespace sh
+
+#endif // COMPILER_TRANSLATOR_VALIDATELIMITATIONS_H_