diff --git a/.gitmodules b/.gitmodules
index b5250d493864e..b549282fd89c3 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -33,7 +33,7 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/19.1-2024-07-30
+	branch = rustc/19.1-2024-09-17
 	shallow = true
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book
diff --git a/src/llvm-project b/src/llvm-project
index 4b8d29c585687..3a17f74904a74 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 4b8d29c585687084bbcf21471e04f279d1eddc0a
+Subproject commit 3a17f74904a74565c54cfac0d67026362d038698