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Summary: Really check if %SP is not used in other places, instead of checking only exact one non-dbg use. Patched by Xuetian Weng. Test Plan: @foo4 in test/CodeGen/NVPTX/local-stack-frame.ll, create a case that SP will appear twice. Reviewers: jholewinski, jingyue Reviewed By: jingyue Subscribers: llvm-commits, sfantao, jholewinski Differential Revision: http://reviews.llvm.org/D10844 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241099 91177308-0d34-0410-b5e6-96231b3b80d8