diff --git a/src/llvm b/src/llvm
index 3e03f7374169..ac1c94226e9f 160000
--- a/src/llvm
+++ b/src/llvm
@@ -1 +1 @@
-Subproject commit 3e03f7374169cd41547d75e62ac2ab8a103a913c
+Subproject commit ac1c94226e9fa17005ce7e2dd52dd6d1875f3137
diff --git a/src/rustllvm/llvm-auto-clean-trigger b/src/rustllvm/llvm-auto-clean-trigger
index 979f5f07abea..b12e25bba694 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.
-2016-09-25
+2016-10-10