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Author SHA1 Message Date
Dan Gohman
ee89338e37 Tweak IVUsers' concept of "interesting" to exclude add recurrences 
where the step value is an induction variable from an outer loop, to
avoid trouble trying to re-expand such expressions. This effectively
hides such expressions from indvars and lsr, which prevents them
from getting into trouble.

llvm-svn: 111317
 2010-08-17 22:50:37 +00:00