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Summary: While implementing inlining support for callbr (https://bugs.llvm.org/show_bug.cgi?id=40722), I hit a crash in Loop Rotation when trying to build the entire x86 Linux kernel (drivers/char/random.c). This is a small fix up to r353563. Test case is drivers/char/random.c (with callbr's inlined), then ran through creduce, then `opt -opt-bisect-limit=<limit>`, then bugpoint. Thanks to Craig Topper for immediately spotting the fix, and teaching me how to fish. Reviewers: craig.topper, jyknight Reviewed By: craig.topper Subscribers: hiraditya, llvm-commits, srhines Tags: #llvm Differential Revision: https://reviews.llvm.org/D58929 llvm-svn: 355564
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