tree adfcef050df75b45f550d208d488f07050221ae2
parent 743ab498d8cc4e828c79a68a6184eb8aeb95b4a1
author Dan Gohman <gohman@apple.com> 1245630717 +0000
committer Dan Gohman <gohman@apple.com> 1245630717 +0000

Teach ScalarEvolution how to analyze loops with multiple exit
blocks, and also exit blocks with multiple conditions (combined
with (bitwise) ands and ors). It's often infeasible to compute an
exact trip count in such cases, but a useful upper bound can often
be found.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73866 91177308-0d34-0410-b5e6-96231b3b80d8