Sam Parker 9737535943 [IRCE] isKnownNonNegative helper function ...

Created a helper function to query for non negative SCEVs. Uses the
SGE predicate to catch constants that could be interpreted as
negative.

Differential Revision: https://reviews.llvm.org/D45481

llvm-svn: 329907

2018-04-12 12:49:40 +00:00

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