DFG ref count calculation should be reusable
https://bugs.webkit.org/show_bug.cgi?id=136811

Reviewed by Oliver Hunt.
        
Henceforth if you call Graph::computeRefCounts(), a nifty O(n) operation, every Node
will be able to tell you how many places it is used from. Currently only DCE uses this,
but it will be useful for https://bugs.webkit.org/show_bug.cgi?id=136330.

* dfg/DFGDCEPhase.cpp:
(JSC::DFG::DCEPhase::run):
(JSC::DFG::DCEPhase::findTypeCheckRoot): Deleted.
(JSC::DFG::DCEPhase::countNode): Deleted.
(JSC::DFG::DCEPhase::countEdge): Deleted.
* dfg/DFGGraph.cpp:
(JSC::DFG::Graph::computeRefCounts):
* dfg/DFGGraph.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@173626 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Add another Apple build slave to the Mountain Lion Debug WK1 queue
        
Rubber stamped by Matt Hanson.
        
* BuildSlaveSupport/build.webkit.org-config/config.json:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@173627 268f45cc-cd09-0410-ab3c-d52691b4dbfc