Integrate LLVM at llvm/llvm-project@40d6497a97a61e (#18581)

Signed-off-by: hanhanW <hanhan0912@gmail.com>
diff --git a/third_party/llvm-project b/third_party/llvm-project
index f264d9a..40d6497 160000
--- a/third_party/llvm-project
+++ b/third_party/llvm-project
@@ -1 +1 @@
-Subproject commit f264d9a9d56f165777f0e1750b3bdb74059fffd0
+Subproject commit 40d6497a97a61ef5ea38e615cc324104cb34072a