[clang] [lld] [llvm] Support -fpass-plugin + -fthinlto-index together (PR #183525)

[Alexis Engelke via llvm-commits]

================
@@ -50,7 +51,12 @@ struct Config {
   TargetOptions Options;
   std::vector<std::string> MAttrs;
   std::vector<std::string> MllvmArgs;
-  std::vector<std::string> PassPlugins;
+  // LTO will register both lists of plugins, but
+  // if an LTO client has already loaded a set of plugins,
+  // they should register them via LoadedPassPlugins.
+  // This is currently used by distributed thin-lto.
+  std::vector<std::string> PassPluginFilenames;
----------------
aengelke wrote:

Do you think it is possible to adjust the other users of this to load the pass plugins themselves? Then we'd again only have a single way to specify pass plugins here.

https://github.com/llvm/llvm-project/pull/183525