diff --git a/.gitmodules b/.gitmodules
index c850493780613..4011a6fa6b95b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -28,7 +28,7 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/15.0-2022-08-09
+	branch = rustc/15.0-2022-12-07
 [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 a1232c451fc27..3dfd4d93fa013 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit a1232c451fc27173f8718e05d174b2503ca0b607
+Subproject commit 3dfd4d93fa013e1c0578d3ceac5c8f4ebba4b6ec