1 files changed, 88 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/bytecode/ResolveGlobalStatus.cpp b/Source/JavaScriptCore/bytecode/ResolveGlobalStatus.cpp
new file mode 100644
index 000000000..ff138704c
--- /dev/null
+++ b/Source/JavaScriptCore/bytecode/ResolveGlobalStatus.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 "config.h"
+#include "ResolveGlobalStatus.h"
+
+#include "CodeBlock.h"
+#include "JSValue.h"
+#include "Structure.h"
+
+namespace JSC {
+
+static ResolveGlobalStatus computeForStructure(CodeBlock* codeBlock, Structure* structure, Identifier& identifier)
+{
+    unsigned attributesIgnored;
+    JSCell* specificValue;
+    size_t offset = structure->get(
+        *codeBlock->globalData(), identifier, attributesIgnored, specificValue);
+    if (offset == notFound)
+        return ResolveGlobalStatus();
+    
+    return ResolveGlobalStatus(ResolveGlobalStatus::Simple, structure, offset, specificValue);
+}
+
+static ResolveGlobalStatus computeForLLInt(CodeBlock* codeBlock, unsigned bytecodeIndex, Identifier& identifier)
+{
+#if ENABLE(LLINT)
+    Instruction* instruction = codeBlock->instructions().begin() + bytecodeIndex;
+    
+    ASSERT(instruction[0].u.opcode == llint_op_resolve_global);
+    
+    Structure* structure = instruction[3].u.structure.get();
+    if (!structure)
+        return ResolveGlobalStatus();
+    
+    return computeForStructure(codeBlock, structure, identifier);
+#else
+    UNUSED_PARAM(codeBlock);
+    UNUSED_PARAM(bytecodeIndex);
+    UNUSED_PARAM(identifier);
+    return ResolveGlobalStatus();
+#endif
+}
+
+ResolveGlobalStatus ResolveGlobalStatus::computeFor(CodeBlock* codeBlock, unsigned bytecodeIndex, Identifier& identifier)
+{
+#if ENABLE(JIT) && ENABLE(VALUE_PROFILER)
+    if (!codeBlock->numberOfGlobalResolveInfos())
+        return computeForLLInt(codeBlock, bytecodeIndex, identifier);
+    
+    if (codeBlock->likelyToTakeSlowCase(bytecodeIndex))
+        return ResolveGlobalStatus(TakesSlowPath);
+    
+    GlobalResolveInfo& globalResolveInfo = codeBlock->globalResolveInfoForBytecodeOffset(bytecodeIndex);
+    
+    if (!globalResolveInfo.structure)
+        return computeForLLInt(codeBlock, bytecodeIndex, identifier);
+    
+    return computeForStructure(codeBlock, globalResolveInfo.structure.get(), identifier);
+#else
+    return computeForLLInt(codeBlock, bytecodeIndex, identifier);
+#endif
+}
+
+} // namespace JSC
+