We currently do not touch a symbol's linkage in the case where a definition
has a single copy. However, this code is effectively unnecessary: either
the definition is not exported, in which case the internalize phase sets
its linkage to internal, or it is exported, in which case we need to promote
linkage to weak. Those two cases are already handled by existing code.
I believe that the only real functional change here is in the case where we
have a single definition which does not prevail (e.g. because the definition
in a native object file prevails). In that case we now lower linkage to
available_externally following the existing code path for that case.
As a result we can remove the isExported function parameter from the
thinLTOResolveWeakForLinkerInIndex function.
Differential Revision: http://reviews.llvm.org/D21883
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274784 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Ensure we keep prevailing copy of LinkOnceAny by converting it to
WeakAny.
Rename odr_resolution test to the now more appropriate weak_resolution
(weak in the linker sense includes linkonce).
Reviewers: joker.eph
Subscribers: llvm-commits, joker.eph
Differential Revision: http://reviews.llvm.org/D20634
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270850 91177308-0d34-0410-b5e6-96231b3b80d8
