Changeset 96461 in webkit for trunk/Source/JavaScriptCore/runtime/JSString.h

Timestamp:

Oct 1, 2011, 2:46:51 PM (14 years ago)

Author:

[email protected]

Message:

Support string length in the DFG
​https://bugs.webkit.org/show_bug.cgi?id=69215

Reviewed by Geoff Garen.

Adds a GetStringLength node to the DFG so that we can support
string.length inline.

• dfg/DFGNode.h:
• dfg/DFGPropagator.cpp:

(JSC::DFG::Propagator::propagateNodePredictions):
(JSC::DFG::Propagator::fixupNode):
(JSC::DFG::Propagator::performNodeCSE):

• dfg/DFGSpeculativeJIT.h:

(JSC::DFG::SpeculativeJIT::isKnownString):

• dfg/DFGSpeculativeJIT32_64.cpp:

(JSC::DFG::SpeculativeJIT::compile):

• dfg/DFGSpeculativeJIT64.cpp:

(JSC::DFG::SpeculativeJIT::compile):

• runtime/JSString.h:

(JSC::JSString::offsetOfLength):

File:

• trunk/Source/JavaScriptCore/runtime/JSString.h (modified) (1 diff)

trunk/Source/JavaScriptCore/runtime/JSString.h

@@ -446 +446 @@
             return Structure::create(globalData, globalObject, proto, TypeInfo(StringType, OverridesGetOwnPropertySlot), &s_info);
         }
-        
+
+        static size_t offsetOfLength() { return OBJECT_OFFSETOF(JSString, m_length); }
+
         static const ClassInfo s_info;