Eli Friedman ddbf83ea14 Preserve assumption cache in loop-rotate. ...

No testcase included because I can't figure out how to reduce it.
(It's easy to write a testcase where rotation clones an assume,
but that doesn't actually seem to trigger the crash in opt on
its own; maybe an issue with the laziness?)

Differential Revision: https://reviews.llvm.org/D26434

llvm-svn: 286410

2016-11-09 23:05:01 +00:00

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