Summary:
This fixes crashes when a BB in which an END_LOOP is to be placed is
unreachable and does not have any predecessors. Fixes PR41307.
Reviewers: dschuff
Subscribers: yurydelendik, sbc100, jgravelle-google, sunfish, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D60004
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@357303 91177308-0d34-0410-b5e6-96231b3b80d8
Heejin Ahn