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Author SHA1 Message Date
Matt Arsenault 9a3fd87523 DAG: Check no signed zeros instead of unsafe math attribute 
llvm-svn: 297354
 2017-03-09 01:36:39 +00:00
Sanjay Patel 75cc90eddc Allow vector fsub ops with constants to get the same optimizations as scalars. 
This problem is bigger than just fsub, but this is the minimum fix to solve
fneg for PR20556 ( http://llvm.org/bugs/show_bug.cgi?id=20556 ), and we solve
zero subtraction with the same change.

llvm-svn: 217286
 2014-09-05 22:26:22 +00:00