Restore the comment from 0ef7ad3 [NFC] Clarify why LinkAll*.h are act…

…ually necessary
intel · Nov 25, 2021 · 2843e15 · 2843e15
1 parent e61f701
commit 2843e15
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/llvm/include/llvm/LinkAllPasses.h b/llvm/include/llvm/LinkAllPasses.h
@@ -66,6 +66,9 @@ namespace {
       // delete it all as dead code, even with whole program optimization,
       // yet is effectively a NO-OP. As the compiler isn't smart enough
       // to know that getenv() never returns -1, this will do the job.
+      // This is so that globals in the translation units where these functions
+      // are defined are forced to be initialized, populating various
+      // registries.
       if (std::getenv("bar") != (char*) -1)
         return;