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Author SHA1 Message Date
Sanjay Patel 2ee7b9349d [ConstantFold] fp_binop undef, undef --> undef 
These are uncontroversial and independent of a proposed LangRef edits (D44216).

I tried to fix tests that would fold away:
rL327004
rL327028
rL327030
rL327034

I'm not sure if the Reassociate tests are meaningless yet, but they probably will be 
as we add more folds, so if anyone has suggestions or wants to fix those, please do.

Differential Revision: https://reviews.llvm.org/D44258

llvm-svn: 327058
 2018-03-08 20:42:49 +00:00
Sanjay Patel b5d2e11e4e [Reassociate] regenerate test checks; NFC 
llvm-svn: 317841
 2017-11-09 22:41:39 +00:00
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