Changeset 36036 in webkit for trunk/JavaScriptCore/kjs/nodes.h

Timestamp:

Sep 2, 2008, 7:58:14 PM (17 years ago)

Author:

[email protected]

Message:

2008-09-02 Geoffrey Garen <​[email protected]>

Reviewed by Anders Carlsson.

Added optimized paths for comparing to null.

SunSpider says 0.5% faster.

File:

• trunk/JavaScriptCore/kjs/nodes.h (modified) (2 diffs)

trunk/JavaScriptCore/kjs/nodes.h

@@ -209 +209 @@
         virtual bool isNumber() const KJS_FAST_CALL { return false; }
         virtual bool isString() const KJS_FAST_CALL { return false; }
+        virtual bool isNull() const KJS_FAST_CALL { return false; }
         virtual bool isPure(CodeGenerator&) const KJS_FAST_CALL { return false; }        
         virtual bool isLocation() const KJS_FAST_CALL { return false; }
@@ -245 +246 @@
         {
         }
+
+        virtual bool isNull() const KJS_FAST_CALL { return true; }
 
         virtual RegisterID* emitCode(CodeGenerator&, RegisterID* = 0) KJS_FAST_CALL;