tree 74a431be767a1fbb85d41045a2a270ff25d09462
parent f963bf876e440891e7103c9a6cdd52a9ab3fec42
author Bob Haarman <llvm@inglorion.net> 1550622361 +0000
committer Bob Haarman <llvm@inglorion.net> 1550622361 +0000

[lld-link] preserve @llvm.used symbols in LTO

Summary:
We translate @llvm.used to COFF by generating /include directives
in the .drectve section. However, in LTO links, this happens after
directives have already been processed, so the new directives do
not take effect. This change marks @llvm.used symbols as GCRoots
so that they are preserved as intended.

Fixes PR40733.

Reviewers: rnk, pcc, ruiu

Reviewed By: ruiu

Subscribers: mehdi_amini, steven_wu, dexonsmith, dang, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58255

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@354410 91177308-0d34-0410-b5e6-96231b3b80d8