- Shaver hacked this fix with advice from me, and I carried it to check-in. We now avoid a heavyweight outer function when the inner one is defined at top-level or in an expression (is not a JSOP_CLOSURE, IOW), and it doesn't refer to any non-local names. See bug 65308 for details on the win. (r=rogerl, sr=brendan)

- Fix scope chain for nested functions at top-level (JSOP_DEFFUN), in a part of another statement (JSOP_CLOSURE), and unnamed in an expression (JSOP_ANONFUNOBJ) to match ECMA-262 13.2.  My bad: fp->varobj was used up till now, instead of fp->scopeChain; we still *bind* the name of a statement-level (top or not) nested function in fp->varobj.  This fixes bug 69559.  (r=rogerl, sr=jband)
- Add an Intern command to the shell, for GC vs. intern'ed atom testing.

js/src/jsopcode.h

@@ -65,6 +65,7 @@ typedef enum JSOp {
 #define JOF_LOOKUPSWITCH  5       /* lookup switch */
 #define JOF_QARG          6       /* quickened get/set function argument ops */
 #define JOF_QVAR          7       /* quickened get/set local variable ops */
+#define JOF_DEFLOCALVAR   8       /* define local var with initial value */
 #define JOF_TYPEMASK      0x000f  /* mask for above immediate types */
 #define JOF_NAME          0x0010  /* name operation */
 #define JOF_PROP          0x0020  /* obj.prop operation */
@@ -109,8 +110,10 @@ typedef enum JSOp {
 /* Synonyms for quick JOF_QARG and JOF_QVAR bytecodes. */
 #define GET_ARGNO(pc)           GET_ARGC(pc)
 #define SET_ARGNO(pc,argno)     SET_JUMP_OFFSET(pc,argno)
+#define ARGNO_LEN               JUMP_OFFSET_LEN
 #define GET_VARNO(pc)           GET_ARGC(pc)
 #define SET_VARNO(pc,varno)     SET_JUMP_OFFSET(pc,varno)
+#define VARNO_LEN               JUMP_OFFSET_LEN
 
 struct JSCodeSpec {
     const char          *name;          /* JS bytecode name */