diff --git a/.gitmodules b/.gitmodules
index b11b47ec108bf..24e23a178eecb 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -24,8 +24,8 @@
 	shallow = true
 [submodule "src/llvm-project"]
 	path = src/llvm-project
-	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/22.1-2026-01-27
+	url = https://github.com/dianqk/llvm-project.git
+	branch = test-perf-regression
 	shallow = true
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book
diff --git a/src/llvm-project b/src/llvm-project
index 05918363362b4..9291b9b620e07 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 05918363362b439b9b0bced3daa14badd75da790
+Subproject commit 9291b9b620e07a0d077b0dc8b6cabd73fdbb8980