tree 98b592d9f80cd7d9d73a4f2992f08d3788666984
parent 9cf6ac8600ac5c9b09f9a5d200f38bdb94f92f6d
author fpizlo@apple.com <fpizlo@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1525045315 +0000
committer fpizlo@apple.com <fpizlo@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1525045315 +0000

B3 should run tail duplication at the bitter end
https://bugs.webkit.org/show_bug.cgi?id=185123

Reviewed by Geoffrey Garen.
        
Also added an option to disable taildup. This appears to be a 1% AsmBench speed-up. It's neutral
everywhere else.
        
The goal of this change is to allow us to run path specialization after switch lowering but
before tail duplication.

* b3/B3Generate.cpp:
(JSC::B3::generateToAir):
* runtime/Options.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@231154 268f45cc-cd09-0410-ab3c-d52691b4dbfc