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Summary: Rather than testing for expected results, test/Transforms/InstCombine/memmove.ll is testing for the absence of calls to llvm.memmove. In the case of test3, the test has stopped testing for materialization of loads/stores, but remained passing due to testing for the absence of llvm.memset calls rather than the presence of load/store instructions. Right now this test ends up with an empty function body because the alloca is eliminated as safe-to-remove, which results in the llvm.memmove calls being eliminated due to a pointer arg being undef; so it is not testing for conversion of llvm.memmove into load/store instructions at all. Reviewers: eli.friedman, anna, efriedma Reviewed By: efriedma Subscribers: efriedma, llvm-commits Differential Revision: https://reviews.llvm.org/D34645 llvm-svn: 306679