diff --git a/src/llvm b/src/llvm
index 1abfd0e562c..56c931901cf 160000
--- a/src/llvm
+++ b/src/llvm
@@ -1 +1 @@
-Subproject commit 1abfd0e562cc8f7a9577d97ee92246699093b954
+Subproject commit 56c931901cfb85cd6f7ed44c7d7520a8de1edf97
diff --git a/src/rustllvm/llvm-rebuild-trigger b/src/rustllvm/llvm-rebuild-trigger
index c3fc3e5452c..5a0292bb6a1 100644
--- a/src/rustllvm/llvm-rebuild-trigger
+++ b/src/rustllvm/llvm-rebuild-trigger
@@ -1,4 +1,4 @@
 # If this file is modified, then llvm will be (optionally) 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.
-2018-04-05
+2018-05-18
\ No newline at end of file