Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)

Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>

1 files changed, 79 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/bytecode/ComplexGetStatus.cpp b/Source/JavaScriptCore/bytecode/ComplexGetStatus.cpp
new file mode 100644
index 000000000..33663d057
--- /dev/null
+++ b/Source/JavaScriptCore/bytecode/ComplexGetStatus.cpp
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2014, 2015 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 "ComplexGetStatus.h"
+
+#include "JSCInlines.h"
+
+namespace JSC {
+
+ComplexGetStatus ComplexGetStatus::computeFor(
+    Structure* headStructure, const ObjectPropertyConditionSet& conditionSet, UniquedStringImpl* uid)
+{
+    // FIXME: We should assert that we never see a structure that
+    // getOwnPropertySlotIsImpure() but for which we don't
+    // newImpurePropertyFiresWatchpoints(). We're not at a point where we can do
+    // that, yet.
+    // https://bugs.webkit.org/show_bug.cgi?id=131810
+    
+    ASSERT(conditionSet.isValid());
+    
+    if (headStructure->takesSlowPathInDFGForImpureProperty())
+        return takesSlowPath();
+    
+    ComplexGetStatus result;
+    result.m_kind = Inlineable;
+    
+    if (!conditionSet.isEmpty()) {
+        result.m_conditionSet = conditionSet;
+        
+        if (!result.m_conditionSet.structuresEnsureValidity())
+            return skip();
+
+        unsigned numberOfSlotBases =
+            result.m_conditionSet.numberOfConditionsWithKind(PropertyCondition::Presence);
+        RELEASE_ASSERT(numberOfSlotBases <= 1);
+        if (!numberOfSlotBases) {
+            // Currently we don't support misses. That's a bummer.
+            // FIXME: https://bugs.webkit.org/show_bug.cgi?id=133052
+            return takesSlowPath();
+        }
+        ObjectPropertyCondition base = result.m_conditionSet.slotBaseCondition();
+        ASSERT(base.kind() == PropertyCondition::Presence);
+        
+        result.m_offset = base.offset();
+    } else
+        result.m_offset = headStructure->getConcurrently(uid);
+    
+    if (!isValidOffset(result.m_offset))
+        return takesSlowPath();
+    
+    return result;
+}
+
+} // namespace JSC
+
+