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* [CodeGen][ObjC] Annotate retain-agnostic ObjC globals with attributeAkira Hatanaka2019-06-141-0/+16
'objc_arc_inert' The attribute enables the ARC optimizer to delete ObjC ARC runtime calls on the annotated globals (see https://reviews.llvm.org/D62433). We currently only annotate global variables for string literals and global blocks with the attribute. rdar://problem/49839633 Differential Revision: https://reviews.llvm.org/D62831 llvm-svn: 363467
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