[PATCH] D17252: [ELF, Bug 26360] - allows undefines that are referenced from garbage collected sections.

[George Rimar via llvm-commits]

grimar created this revision.
grimar added reviewers: ruiu, rafael.
grimar added subscribers: llvm-commits, grimar.

This fixes the https://llvm.org/bugs/show_bug.cgi?id=26360.

If code is unreferenced and is about to be pruned away by --gc-sections, it is allowed to contain references to undefined symbols. 

http://reviews.llvm.org/D17252

Files:
  ELF/Symbols.cpp
  ELF/Symbols.h
  ELF/Writer.cpp
  test/ELF/gc-sections-unref-undef.s
  test/ELF/gc-sections-unref-undef2.s

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