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d61dc6f44b
Summary: This fixes PR 37422 In ELF, non-weak symbols can also be non-prevailing. In this particular PR, the __llvm_profile_* symbols are non-prevailing but weren't getting dropped - causing multiply-defined errors with lld. Also add a test, strong_non_prevailing.ll, to ensure that multiple copies of a strong symbol are dropped. To fix the test regressions exposed by this fix, - do not mark prevailing copies for symbols with 'appending' linkage. There's no one prevailing copy for such symbols. - fix the prevailing version in dead-strip-fulllto.ll - explicitly pass exported symbols to llvm-lto in fumcimport.ll and funcimport_var.ll Reviewers: tejohnson, pcc Subscribers: mehdi_amini, inglorion, eraman, steven_wu, dexonsmith, dang, srhines, llvm-commits Differential Revision: https://reviews.llvm.org/D54125 llvm-svn: 346436