update submodules
diff --git a/llvm b/llvm
index 6d4546e..1837418 160000
--- a/llvm
+++ b/llvm
@@ -1 +1 @@
-Subproject commit 6d4546ea14a4e4766c09686d6ca43c605c16a8e5
+Subproject commit 18374180e36648532e051b9aa254b559b9648cb2