[PATCH] D38998: [ELF] - Dedupliсate FDEs when sections are ICFed.

[George Rimar via Phabricator via llvm-commits]

grimar created this revision.
Herald added a subscriber: emaste.

When LLD do ICF for 2 identical sections it leaves 2 duplicate entries in .eh_frame
pointing to the same address. After that it fixes .eh_frame_header's header,
so that it says it contains single FDE, though section itself contains 2 
(it contains garbage data at tail).

As a result excessive entries in .eh_frame and excessive dummy data in .eh_frame_header
emited to output. Patch fixes that. This is PR34518.


https://reviews.llvm.org/D38998

Files:
  ELF/SyntheticSections.cpp
  test/ELF/eh-frame-hdr-icf-fde.s
  test/ELF/eh-frame-hdr-icf.s

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