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Author SHA1 Message Date
Chandler Carruth d50c5fb13f [PM] Teach LoopDeletion to correctly update the LPM when loops are 
deleted.

I've expanded its test coverage a bit including adding one test that
will crash clearly without this change.

llvm-svn: 292332
 2017-01-18 02:41:26 +00:00
Jun Bum Lim c837af306e [PM] Port Dead Loop Deletion Pass to the new PM 
Summary: Port Dead Loop Deletion Pass to the new pass manager.

Reviewers: silvas, davide

Subscribers: llvm-commits, sanjoy, mcrosier

Differential Revision: https://reviews.llvm.org/D21483

llvm-svn: 275453
 2016-07-14 18:28:29 +00:00
Dan Gohman 41d00ac45b Make LoopDeletion check the maximum backedge taken count, rather than the 
exact backedge taken count, when checking for infinite loops. This allows
it to delete loops with multiple exit conditions.

llvm-svn: 84952
 2009-10-23 17:10:01 +00:00