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Author SHA1 Message Date
Owen Anderson 8e85130bb9 Fix another infinite loop in Reassociate caused by Constant::isZero(). 
Not all zero vectors are ConstantDataVector's.

llvm-svn: 253723
 2015-11-20 22:34:48 +00:00
Owen Anderson 630077ef55 Fix a pair of issues that caused an infinite loop in reassociate. 
Terrifyingly, one of them is a mishandling of floating point vectors
in Constant::isZero().  How exactly this issue survived this long
is beyond me.

llvm-svn: 253655
 2015-11-20 08:16:13 +00:00