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Author SHA1 Message Date
Sanjay Patel 21a62e23d8 [Reassociate] add vector tests with undef elements; NFC 
Also, regenerate checks for these files. We should do better
on the vector tests by using the PatternMatch API instead of
BinaryOperator::isNot/isNeg.

llvm-svn: 344964
 2018-10-22 22:04:13 +00:00
Owen Anderson 8373d338f6 Give the Reassociate pass a bit more flexibility and autonomy when optimizing expressions. 
Particularly, it addresses cases where Reassociate breaks Subtracts but then fails to optimize combinations like I1 + -I2 where I1 and I2 have the same rank and are identical.

Patch by Dmitri Shtilman.

llvm-svn: 219092
 2014-10-05 23:41:26 +00:00