diff --git a/src/llvm b/src/llvm
index a884d21cc5f..878af191434 160000
--- a/src/llvm
+++ b/src/llvm
@@ -1 +1 @@
-Subproject commit a884d21cc5f0b23a1693d1e872fd8998a4fdd17f
+Subproject commit 878af191434cd716eeb13c2be7a2b1e21abf2749
diff --git a/src/rustllvm/llvm-rebuild-trigger b/src/rustllvm/llvm-rebuild-trigger
index c8732e27b82..52ebf449d60 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.
-2017-03-23
+2017-04-25