Reorganized new sources from recently applied patch into third_party directory.
Review URL: https://codereview.appspot.com/7105049
git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1779 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/third_party/compiler/ArrayBoundsClamper.cpp b/src/third_party/compiler/ArrayBoundsClamper.cpp
new file mode 100644
index 0000000..33d9b23
--- /dev/null
+++ b/src/third_party/compiler/ArrayBoundsClamper.cpp
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2012 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "third_party/compiler/ArrayBoundsClamper.h"
+
+const char* kIntClampBegin = "// BEGIN: Generated code for array bounds clamping\n\n";
+const char* kIntClampEnd = "// END: Generated code for array bounds clamping\n\n";
+const char* kIntClampDefinition = "int webgl_int_clamp(int value, int minValue, int maxValue) { return ((value < minValue) ? minValue : ((value > maxValue) ? maxValue : value)); }\n\n";
+
+namespace {
+
+class ArrayBoundsClamperMarker : public TIntermTraverser {
+public:
+ ArrayBoundsClamperMarker()
+ : mNeedsClamp(false)
+ {
+ }
+
+ virtual bool visitBinary(Visit visit, TIntermBinary* node)
+ {
+ if (node->getOp() == EOpIndexIndirect)
+ {
+ TIntermTyped* left = node->getLeft();
+ if (left->isArray() || left->isVector() || left->isMatrix())
+ {
+ node->setAddIndexClamp();
+ mNeedsClamp = true;
+ }
+ }
+ return true;
+ }
+
+ bool GetNeedsClamp() { return mNeedsClamp; }
+
+private:
+ bool mNeedsClamp;
+};
+
+} // anonymous namespace
+
+ArrayBoundsClamper::ArrayBoundsClamper()
+ : mArrayBoundsClampDefinitionNeeded(false)
+{
+}
+
+void ArrayBoundsClamper::OutputClampingFunctionDefinition(TInfoSinkBase& out) const
+{
+ if (!mArrayBoundsClampDefinitionNeeded)
+ {
+ return;
+ }
+ out << kIntClampBegin << kIntClampDefinition << kIntClampEnd;
+}
+
+void ArrayBoundsClamper::MarkIndirectArrayBoundsForClamping(TIntermNode* root)
+{
+ ASSERT(root);
+
+ ArrayBoundsClamperMarker clamper;
+ root->traverse(&clamper);
+ if (clamper.GetNeedsClamp())
+ {
+ SetArrayBoundsClampDefinitionNeeded();
+ }
+}
+