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Author SHA1 Message Date
Evgeniy Stepanov 1df7d9b60b Change section flag character for SHF_LINK_ORDER to "o". 
See matching MC change in https://reviews.llvm.org/D31554.

llvm-svn: 299480
 2017-04-04 22:35:16 +00:00
Evgeniy Stepanov 4b78036ba8 [ELF] Restore GC handling of LINK_ORDER, C-named sections. 
__start_xxx symbol keeps section xxx alive only if it is not
SHF_LINK_ORDER. Such sections can be used for user metadata, when
__start_xxx is used to iterate over section contents at runtime, and
the liveness is determined solely by the linked (associated) section.

This was earlier implemented in r294592, and broken in r296723.

Differential Revision: https://reviews.llvm.org/D30964

llvm-svn: 298154
 2017-03-17 22:04:52 +00:00