diff --git a/.gitmodules b/.gitmodules
index dd74d49828f7..c124cf7473f0 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -43,7 +43,7 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/8.0-2019-03-18
+	branch = rustc/9.0-2019-07-12
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book
 	url = https://github.com/rust-embedded/book.git
diff --git a/src/llvm-project b/src/llvm-project
index 6c1a545b269b..f6446fa8e962 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 6c1a545b269bc046743c6bb9b0173ec37bd624ab
+Subproject commit f6446fa8e9629ffb1861303f17930c3aa83ef660