Imported WebKit commit 356d83016b090995d08ad568f2d2c243aa55e831 (http://svn.webkit.org/repository/webkit/trunk@126147)

New snapshot including various build fixes for newer Qt 5

1 files changed, 55 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/bytecode/ArrayProfile.cpp b/Source/JavaScriptCore/bytecode/ArrayProfile.cpp
new file mode 100644
index 000000000..6b97f7806
--- /dev/null
+++ b/Source/JavaScriptCore/bytecode/ArrayProfile.cpp
@@ -0,0 +1,55 @@
+/*
+ * 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 "config.h"
+#include "ArrayProfile.h"
+
+namespace JSC {
+
+void ArrayProfile::computeUpdatedPrediction(OperationInProgress operation)
+{
+    if (m_lastSeenStructure) {
+        m_observedArrayModes |= arrayModeFromStructure(m_lastSeenStructure);
+        if (!m_structureIsPolymorphic) {
+            if (!m_expectedStructure)
+                m_expectedStructure = m_lastSeenStructure;
+            else if (m_expectedStructure != m_lastSeenStructure) {
+                m_expectedStructure = 0;
+                m_structureIsPolymorphic = true;
+            }
+        }
+        m_lastSeenStructure = 0;
+    }
+    
+    if (operation == Collection
+        && m_expectedStructure
+        && !Heap::isMarked(m_expectedStructure)) {
+        m_expectedStructure = 0;
+        m_structureIsPolymorphic = true;
+    }
+}
+
+} // namespace JSC
+