[PATCH] D26076: [ThinLTO] Correctly resolve linkonce when importing aliasee

[Teresa Johnson via llvm-commits]

tejohnson created this revision.
tejohnson added a reviewer: mehdi_amini.
tejohnson added a subscriber: llvm-commits.

When we have an aliasee that is linkonce, while we can't convert
the non-prevailing copies to available_externally, we still need to
convert the prevailing copy to weak. If a reference to the aliasee
is exported, not converting a copy to weak will result in undefined
references when the linkonce is removed in its original module.

Add a new test and update existing tests.


https://reviews.llvm.org/D26076

Files:
  lib/LTO/LTO.cpp
  test/ThinLTO/X86/Inputs/linkonce_aliasee_ref_import.ll
  test/ThinLTO/X86/alias_import.ll
  test/ThinLTO/X86/linkonce_aliasee_ref_import.ll
  test/ThinLTO/X86/weak_resolution.ll
  test/tools/gold/X86/thinlto_weak_resolution.ll

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