Integrate LLVM at llvm/llvm-project@b5149f4e66a4

Updates LLVM usage to match
[b5149f4e66a4](https://github.com/llvm/llvm-project/commit/b5149f4e66a4)

PiperOrigin-RevId: 419786634

SUBMODULE_VERSIONS.txt

diff --git a/SUBMODULE_VERSIONS.txt b/SUBMODULE_VERSIONS.txt
index e576e40..b4fd94a 100644
--- a/SUBMODULE_VERSIONS.txt
+++ b/SUBMODULE_VERSIONS.txt
@@ -4,7 +4,7 @@
 aa533abfd4232b01f9e57041d70114d5a77e6de0 third_party/googletest
 88b845dee001723c4a0db1fe5477de735b6d3bb0 third_party/liburing
 f8f760f7387d2cc56a2fc7b1be313a3bf3f7f58c third_party/libyaml
-37be74885946f18dbeb70343ad659924c61d2549 third_party/llvm-project
+b5149f4e66a49a98b67e8e2de4e24a4af8e2781b third_party/llvm-project
 8ff74aee67ecc3778a878936d47b005a7e614067 third_party/mlir-hlo
 3f701faace7addc75d16dea8a6cd769fa5b3f260 third_party/musl
 59aa99860c60bd171b9565e9920f125fdb749267 third_party/pybind11

third_party/llvm-project

diff --git a/third_party/llvm-project b/third_party/llvm-project
index 37be748..b5149f4 160000
--- a/third_party/llvm-project
+++ b/third_party/llvm-project
@@ -1 +1 @@
-Subproject commit 37be74885946f18dbeb70343ad659924c61d2549
+Subproject commit b5149f4e66a49a98b67e8e2de4e24a4af8e2781b