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Summary: https://llvm.org/bugs/show_bug.cgi?id=31142 : SROA was dropping the nonnull metadata on loads from allocas that got optimized out. This patch simply preserves nonnull metadata on loads through SROA and mem2reg. Reviewers: chandlerc, efriedma Reviewed By: efriedma Subscribers: hfinkel, spatel, efriedma, arielb1, davide, llvm-commits Differential Revision: https://reviews.llvm.org/D27114 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298540 91177308-0d34-0410-b5e6-96231b3b80d8