Brian Hackett [Laid off!] Assignee
	Description • 14 years ago

When a loop is blacklisted the script's code is mutated to write a JSOP_NOTRACE over the JSOP_TRACE.  The Method JIT treats a jump to a JSOP_NOTRACE like a regular jump, and does not generate a trace IC.  This is a problem if the loop gets blacklisted, compiled, and then unblacklisted, as Unblacklist does not have a trace IC to patch and will do the wrong thing or crash.  This keeps us from being able to discard JIT code for bug 617656.

Instead, a trace IC should be generated for JSOP_NOTRACE, but should be default-disabled, allowing it to be unblacklisted later.

	Brian Hackett [Laid off!] Assignee
	Comment 1 • 14 years ago

Fixed as part of bug 617656.

	LegNeato
	Comment 2 • 14 years ago

As per today's meeting, beta 9 will be a time-based release. Marking these all betaN+. Please move it back to beta9+ if  you believe it MUST be in the next beta (ie: trunk is in an unshippable state without this)