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Non-prevailing weak/linkonce odr symbols will be dropped by ThinLTO to available_externally when possible. If they had an initializer in the global_ctors list, a comdat group was being created. This code already had logic to skip available_externally defs, but now the EliminateAvailableExternally pass will drop these symbols to declarations earlier. Change the check to skip all declarations for linker (which includes available_externally along with declarations). Reviewers: mehdi_amini Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D28737 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292408 91177308-0d34-0410-b5e6-96231b3b80d8
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