old_contents: """Provides the repository macro to import LLVM."""
  
  load("//third_party:repo.bzl", "tfrt_http_archive")
  
  def repo(name):
      """Imports LLVM."""
      LLVM_COMMIT = "45ac5f5441818afa1b0ee4a3734583c8cc915a79"
      LLVM_SHA256 = "a901060c2252ce5fe864e9b50e19c5925724e707e3eaf9d2dc411dc11334b897"
  
      tfrt_http_archive(
          name = name,
          sha256 = LLVM_SHA256,
          strip_prefix = "llvm-project-" + LLVM_COMMIT,
          urls = [
              "https://storage.googleapis.com/mirror.tensorflow.org/github.com/llvm/llvm-project/archive/{commit}.tar.gz".format(commit = LLVM_COMMIT),
              "https://github.com/llvm/llvm-project/archive/{commit}.tar.gz".format(commit = LLVM_COMMIT),
          ],
          link_files = {
              "//third_party/llvm:llvm.autogenerated.BUILD": "llvm/BUILD",
              "//third_party/mlir:BUILD": "mlir/BUILD",
              "//third_party/mlir:build_defs.bzl": "mlir/build_defs.bzl",
              "//third_party/mlir:linalggen.bzl": "mlir/linalggen.bzl",
              "//third_party/mlir:tblgen.bzl": "mlir/tblgen.bzl",
              "//third_party/mlir:test.BUILD": "mlir/test/BUILD",
          },
      )
  
new_contents: """Provides the repository macro to import LLVM."""
  
  load("//third_party:repo.bzl", "tfrt_http_archive")
  
  def repo(name):
      """Imports LLVM."""
      LLVM_COMMIT = "21d91a8ef319eec9c2c272e19beee726429524aa"
      LLVM_SHA256 = "39f116f6ad3f759ff96c851818a52b5a94e364a1278c610ba78abb6d48ac0e6c"
  
      tfrt_http_archive(
          name = name,
          sha256 = LLVM_SHA256,
          strip_prefix = "llvm-project-" + LLVM_COMMIT,
          urls = [
              "https://storage.googleapis.com/mirror.tensorflow.org/github.com/llvm/llvm-project/archive/{commit}.tar.gz".format(commit = LLVM_COMMIT),
              "https://github.com/llvm/llvm-project/archive/{commit}.tar.gz".format(commit = LLVM_COMMIT),
          ],
          link_files = {
              "//third_party/llvm:llvm.autogenerated.BUILD": "llvm/BUILD",
              "//third_party/mlir:BUILD": "mlir/BUILD",
              "//third_party/mlir:build_defs.bzl": "mlir/build_defs.bzl",
              "//third_party/mlir:linalggen.bzl": "mlir/linalggen.bzl",
              "//third_party/mlir:tblgen.bzl": "mlir/tblgen.bzl",
              "//third_party/mlir:test.BUILD": "mlir/test/BUILD",
          },
      )
  
subject: Integrate LLVM at llvm/llvm-project@21d91a8ef319