diff --git a/src/llvm b/src/llvm
index ac1c94226e9fa..8c9961a9cc406 160000
--- a/src/llvm
+++ b/src/llvm
@@ -1 +1 @@
-Subproject commit ac1c94226e9fa17005ce7e2dd52dd6d1875f3137
+Subproject commit 8c9961a9cc406c9bcb29a8752a4a2ad9f5f98b1b
diff --git a/src/rustllvm/llvm-auto-clean-trigger b/src/rustllvm/llvm-auto-clean-trigger
index f4b5ca7a15724..0f63d70af9d37 100644
--- a/src/rustllvm/llvm-auto-clean-trigger
+++ b/src/rustllvm/llvm-auto-clean-trigger
@@ -1,4 +1,4 @@
 # If this file is modified, then llvm will be forcibly cleaned and then rebuilt.
 # The actual contents of this file do not matter, but to trigger a change on the
 # build bots then the contents should be changed so git updates the mtime.
-2016-10-10b
+2016-10-18