diff --git a/.gitmodules b/.gitmodules
index e79f2f089c1..0bbccb57130 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -25,7 +25,7 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/15.0-2022-12-07
+	branch = rustc/16.0-2023-03-06
 [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 fd949f3034f..2b9c52f6681 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit fd949f3034f8a422ecfffa889c2823485dde4bdd
+Subproject commit 2b9c52f66815bb8d6ea74a4b26df3410602be9b0