diff --git a/.gitmodules b/.gitmodules
index c60a0dd2c7c43..96ec601d1a252 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -33,8 +33,8 @@
 	url = https://github.com/rust-lang/edition-guide.git
 [submodule "src/llvm-project"]
 	path = src/llvm-project
-	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/13.0-2021-09-30
+	url = https://github.com/nikic/llvm-project.git
+	branch = rust-simplifycfg-unreachable-test
 [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 2abffbf977a9e..191a52040704c 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 2abffbf977a9e8c6ca4174a08fe5c4d7781f0aac
+Subproject commit 191a52040704c19fe73c3feaaf8f8682b1e6effe