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* [SimplifyCFG] Merge together cleanuppadsDavid Majnemer2016-02-201-0/+39
Cleanuppads may be merged together if one is the only predecessor of the other in which case a simple transform can be performed: replace the a cleanupret with a branch and remove an unnecessary cleanuppad. Differential Revision: http://reviews.llvm.org/D17459 llvm-svn: 261390
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