COFF: Fix /export.

Mangled dllexported symbols may be defined in a library.
If that's the case, we have to read a member file from the library.

llvm-svn: 240947

1 files changed, 4 insertions, 0 deletions

diff --git a/lld/COFF/SymbolTable.cpp b/lld/COFF/SymbolTable.cpp
index 4b6555210d1a..82bd17a068a4 100644
--- a/lld/COFF/SymbolTable.cpp
+++ b/lld/COFF/SymbolTable.cpp
@@ -209,6 +209,10 @@ std::pair<StringRef, Symbol *> SymbolTable::findMangled(StringRef S) {
     Symbol *Sym = I.second;
     if (!Name.startswith(Prefix))
       continue;
+    if (auto *B = dyn_cast<Lazy>(Sym->Body)) {
+      addMemberFile(B);
+      run();
+    }
     if (isa<Defined>(Sym->Body))
       return std::make_pair(Name, Sym);
   }