[PATCH] D32317: [coff] for /msvclto, pass archive members with prevailing symbols first

[Bob Haarman via Phabricator via llvm-commits]

inglorion created this revision.
Herald added a subscriber: mehdi_amini.

When using /msvclto, lld and MSVC's linker both do their own symbol resolution. This can cause them to select different archive members, which can result in undefined references. This change avoids that situation by extracting archive members that are selected by lld and passing those to link.exe before any archives, so that MSVC's uses those objects for symbol resolution instead of different archive members.


https://reviews.llvm.org/D32317

Files:
  COFF/Config.h
  COFF/Driver.cpp
  test/COFF/Inputs/msvclto-order-a.ll
  test/COFF/Inputs/msvclto-order-b.ll
  test/COFF/msvclto-order.ll

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