[lld] [LLD][COFF] Support anti-dependency symbols (PR #112542)

[Jacek Caban via llvm-commits]

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@@ -737,7 +737,7 @@ StringRef LinkerDriver::mangleMaybe(Symbol *s) {
   // If we find a similar mangled symbol, make this an alias to it and return
   // its name.
   log(unmangled->getName() + " aliased to " + mangled->getName());
-  unmangled->weakAlias = ctx.symtab.addUndefined(mangled->getName());
+  unmangled->setWeakAlias(ctx.symtab.addUndefined(mangled->getName()));
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cjacek wrote:

We could make it private, but it will need a few more changes. As `getWeakAlias` follows the chain, it's not a replacement for accessing `weakAlias` directly. I will create a follow-up, thanks!

https://github.com/llvm/llvm-project/pull/112542