[PATCH] [X86] Don't transform atomic-load-add into an inc/dec when inc/dec is slow

Robin Morisset morisset at google.com
Wed Oct 8 11:55:09 PDT 2014

Hi jfb, nadav,

I had to move code around and turn a static function into a method to get
access to Subtarget, but the only "real" change is the extra check for


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