diff -r 000000000000 -r 6474c204b198 gfx/angle/src/compiler/ForLoopUnroll.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/angle/src/compiler/ForLoopUnroll.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,52 @@
+//
+// Copyright (c) 2011 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 ForLoopUnroll_h
+#define ForLoopUnroll_h
+
+#include "compiler/intermediate.h"
+
+struct TLoopIndexInfo {
+    int id;
+    int initValue;
+    int stopValue;
+    int incrementValue;
+    TOperator op;
+    int currentValue;
+};
+
+class ForLoopUnroll {
+public:
+    ForLoopUnroll() { }
+
+    void FillLoopIndexInfo(TIntermLoop* node, TLoopIndexInfo& info);
+
+    // Update the info.currentValue for the next loop iteration.
+    void Step();
+
+    // Return false if loop condition is no longer satisfied.
+    bool SatisfiesLoopCondition();
+
+    // Check if the symbol is the index of a loop that's unrolled.
+    bool NeedsToReplaceSymbolWithValue(TIntermSymbol* symbol);
+
+    // Return the current value of a given loop index symbol.
+    int GetLoopIndexValue(TIntermSymbol* symbol);
+
+    void Push(TLoopIndexInfo& info);
+    void Pop();
+
+    static void MarkForLoopsWithIntegerIndicesForUnrolling(TIntermNode* root);
+
+private:
+    int getLoopIncrement(TIntermLoop* node);
+
+    int evaluateIntConstant(TIntermConstantUnion* node);
+
+    TVector<TLoopIndexInfo> mLoopIndexStack;
+};
+
+#endif