[llvm-branch-commits] [clang] [Clang] Load pass plugins before parsing LLVM options (PR #171868)

[Tarun Prabhu via llvm-branch-commits]

================
@@ -233,6 +234,20 @@ bool ExecuteCompilerInvocation(CompilerInstance *Clang) {
 
   Clang->LoadRequestedPlugins();
 
+  // Load and store pass plugins for the back-end. Store the loaded pass plugins
+  // here and store references to these in CodeGenOpts to avoid pulling in the
+  // entire PassPlugin dependency chain in CodeGenOpts.
+  std::vector<std::unique_ptr<llvm::PassPlugin>> PassPlugins;
+  for (const std::string &Path : Clang->getCodeGenOpts().PassPlugins) {
+    if (auto PassPlugin = llvm::PassPlugin::Load(Path)) {
----------------
tarunprabhu wrote:

Perhaps use an explicit type here instead of `auto`

https://github.com/llvm/llvm-project/pull/171868