Integrate LLVM at llvm/llvm-project@668e33c6401a

Updates LLVM usage to match
[668e33c6401a](llvm/llvm-project@668e33c6401a)

PiperOrigin-RevId: 553004223

third_party/llvm/generated.patch

@@ -1 +1,74 @@
 Auto generated patch. Do not edit or delete it, even if empty.
+diff -ruN --strip-trailing-cr a/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel b/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
+--- a/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
++++ b/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
+@@ -3522,12 +3522,21 @@
+     td_srcs = ["include/llvm/Option/OptParser.td"],
+ )
+
++expand_template(
++    name = "dwp_main",
++    out = "llvm-dwp-driver.cpp",
++    substitutions = {
++        "@TOOL_NAME@": "llvm_dwp",
++    },
++    template = "cmake/modules/llvm-driver-template.cpp.in",
++)
++
+ cc_binary(
+     name = "llvm-dwp",
+     srcs = glob([
+         "tools/llvm-dwp/*.cpp",
+         "tools/llvm-dwp/*.h",
+-    ]),
++    ]) + ["llvm-dwp-driver.cpp"],
+     copts = llvm_copts,
+     stamp = 0,
+     deps = [
+@@ -3725,12 +3734,21 @@
+     td_srcs = ["include/llvm/Option/OptParser.td"],
+ )
+
++expand_template(
++    name = "libtool-darwin_main",
++    out = "llvm-libtool-darwin-driver.cpp",
++    substitutions = {
++        "@TOOL_NAME@": "llvm_libtool_darwin",
++    },
++    template = "cmake/modules/llvm-driver-template.cpp.in",
++)
++
+ cc_binary(
+     name = "llvm-libtool-darwin",
+     srcs = glob([
+         "tools/llvm-libtool-darwin/*.cpp",
+         "tools/llvm-libtool-darwin/*.h",
+-    ]),
++    ]) + ["llvm-libtool-darwin-driver.cpp"],
+     copts = llvm_copts,
+     stamp = 0,
+     deps = [
+@@ -4686,12 +4704,22 @@
+     td_srcs = ["include/llvm/Option/OptParser.td"],
+ )
+
++expand_template(
++    name = "sancov_main",
++    out = "sancov-driver.cpp",
++    substitutions = {
++        "@TOOL_NAME@": "sancov",
++    },
++    template = "cmake/modules/llvm-driver-template.cpp.in",
++)
++
++
+ cc_binary(
+     name = "sancov",
+     srcs = glob([
+         "tools/sancov/*.cpp",
+         "tools/sancov/*.h",
+-    ]),
++    ]) + ["sancov-driver.cpp"],
+     copts = llvm_copts,
+     stamp = 0,
+     deps = [

third_party/llvm/workspace.bzl

@@ -4,8 +4,8 @@ load("//third_party:repo.bzl", "tf_http_archive")
 
 def repo(name):
     """Imports LLVM."""
-    LLVM_COMMIT = "015ffba811c49ee4d98cc68125b03bd5e1c2a2b6"
-    LLVM_SHA256 = "a770670cd47b09cd51ccd64c28d799aa1c899c77c691c4e3ec8edd24ac827779"
+    LLVM_COMMIT = "668e33c6401abe7844691fb7d47a3cf2d2012dbc"
+    LLVM_SHA256 = "b97fefaa486b106c8dd45b963116ed7684d8f3f55682116d5760b0b60db17702"
 
     tf_http_archive(
         name = name,