[core] support .gnu.linkonce sections

.gnu.linkonce sections are similar to section groups. They were supported before
section groups existed and provided a way to resolve COMDAT sections using a
different design. There are few implementations that use .gnu.linkonce sections
to store simple floating point constants which doesnot require complex section
group support but need a way to store only one copy of the floating point
constant. .gnu.linkonce based symbol resolution achieves that.

llvm-svn: 205163

1 files changed, 2 insertions, 1 deletions

diff --git a/lld/lib/ReaderWriter/Native/WriterNative.cpp b/lld/lib/ReaderWriter/Native/WriterNative.cpp
index 9735783b0a9..c1173380faa 100644
--- a/lld/lib/ReaderWriter/Native/WriterNative.cpp
+++ b/lld/lib/ReaderWriter/Native/WriterNative.cpp
@@ -41,7 +41,8 @@ public:
       // We are trying to process all atoms, but the defined() iterator does not
       // return group children. So, when a group parent is found, we need to
       // handle each child atom.
-      if (defAtom->contentType() == DefinedAtom::typeGroupComdat) {
+      if (defAtom->contentType() == DefinedAtom::typeGroupComdat ||
+          defAtom->contentType() == DefinedAtom::typeGnuLinkOnce) {
         for (const Reference *r : *defAtom) {
           if (r->kindNamespace() != lld::Reference::KindNamespace::all)
             continue;