Closed Bug 694527 Opened 9 years ago Closed 9 years ago
JM+TI: Add better fast path for jsop
_regex now that Reg Exp Private is lazy
Since RegExpPrivates are lazy and purged on every GC, I removed the eager propagation of the RegExpPrivate from the script's RegExpObject in methodjitted jsop_regexp in bug 673188. What we probably want now is to: - Eagerly initialize the |RegExpPrivate| for the script's RegExpObject at methodjit compile time - Test whether the RegExpPrivate slot is null - If so, exit to stub, which will create it on the script's RegExpObject (for reuse later) and then clone it as normal - Otherwise, incref as we were doing before Should be a tiny patch, but I didn't want to try to fix it for the former commit so that we'd have a patch per bug.
We need the JSOP_REGEXP op to create sharing of the RegExpPrivate. If the script's RegExpObject has a NULL RegExpPrivate no such sharing will occur.
Also, like I was indicating in the bug description, with the purging added in bug 634654 we'll want to branch to the stub if the original has a null RegExpPrivate so that we can recreate and subsequently share it.
Forgotten refcount bump for mjit code.
Attachment #567133 - Flags: review?(bhackett1024) → review+
Target Milestone: --- → mozilla10
Status: ASSIGNED → RESOLVED
Closed: 9 years ago
Resolution: --- → FIXED
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