From c23a29ff7b7f3bd2ca603e07a7973159fa4dae23 Mon Sep 17 00:00:00 2001
From: Micah Snyder <micasnyd@cisco.com>
Date: Mon, 5 Aug 2024 15:18:59 -0400
Subject: [PATCH] Update clambcc/clambc-compiler.py

---
 clambcc/clambc-compiler.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/clambcc/clambc-compiler.py b/clambcc/clambc-compiler.py
index a21afcbc22..adeeef7c05 100755
--- a/clambcc/clambc-compiler.py
+++ b/clambcc/clambc-compiler.py
@@ -652,7 +652,12 @@ def createInputSourceFile(clangLLVM: ClangLLVM, name: str, args: list, options:
     'clambc-lcompiler',
     'verify',
 
-    # TODO: What does this do?
+    # This pass loops over all of the functions in the input module, looking for a main function. 
+    # If a main function is found, all other functions and all global variables with initializers are marked as internal.
+    #
+    # We maintain a list of public API functions to NOT internalize. See `INTERNALIZE_API_LIST`, above.
+    #
+    # See: https://llvm.org/docs/Passes.html#internalize-internalize-global-symbols
     'internalize',
     'verify',