D63921 requires getExitEdges fills a vector of Edge pairs where BasicBlocks are not constant. The rest Loop API mostly returns non-const BasicBlocks, so to be more consistent with other Loop API getExitEdges is modified to return non-const BasicBlocks as well. This is an alternative solution to D64060. Reviewers: reames, fhahn Reviewed By: reames, fhahn Subscribers: hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D64309 llvm-svn: 365437
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