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Author SHA1 Message Date
Andrew Trick 402edbbe39 LSR critical edge splitting fix for PR13756. 
llvm-svn: 164147
 2012-09-18 17:51:33 +00:00
Andrew Trick 8de329a9fc LSR should avoid redundant edge splitting. 
This handles the case in which LSR rewrites an IV user that is a phi and
splits critical edges originating from a switch.
Fixes <rdar://problem/6453893> LSR is not splitting edges "nicely"

llvm-svn: 141059
 2011-10-04 03:50:44 +00:00