diff --git a/libcxx/utils/google-benchmark/CONTRIBUTORS b/libcxx/utils/google-benchmark/CONTRIBUTORS
--- a/libcxx/utils/google-benchmark/CONTRIBUTORS
+++ b/libcxx/utils/google-benchmark/CONTRIBUTORS
@@ -61,6 +61,7 @@
 Robert Guo <robert.guo@mongodb.com>
 Roman Lebedev <lebedev.ri@gmail.com>
 Shuo Chen <chenshuo@chenshuo.com>
+Steven Wan <wan.yu@ibm.com>
 Tobias Ulvgård <tobias.ulvgard@dirac.se>
 Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
 Yixuan Qiu <yixuanq@gmail.com>
diff --git a/libcxx/utils/google-benchmark/README.LLVM b/libcxx/utils/google-benchmark/README.LLVM
--- a/libcxx/utils/google-benchmark/README.LLVM
+++ b/libcxx/utils/google-benchmark/README.LLVM
@@ -24,3 +24,5 @@
   preceding change.
 * https://github.com/google/benchmark/commit/ffe1342eb2faa7d2e7c35b4db2ccf99fab81ec20
   is applied to add the CycleTimer implementation for M680x0
+* https://github.com/google/benchmark/commit/d9abf017632be4a00b92cf4289539b353fcea5d2
+  is applied to rename 'mftbl' to 'mftb'.
diff --git a/libcxx/utils/google-benchmark/src/cycleclock.h b/libcxx/utils/google-benchmark/src/cycleclock.h
--- a/libcxx/utils/google-benchmark/src/cycleclock.h
+++ b/libcxx/utils/google-benchmark/src/cycleclock.h
@@ -92,7 +92,7 @@
   uint32_t tbl, tbu0, tbu1;
   asm volatile(
       "mftbu %0\n"
-      "mftbl %1\n"
+      "mftb %1\n"
       "mftbu %2"
       : "=r"(tbu0), "=r"(tbl), "=r"(tbu1));
   tbl &= -static_cast<int32_t>(tbu0 == tbu1);
diff --git a/llvm/utils/benchmark/CONTRIBUTORS b/llvm/utils/benchmark/CONTRIBUTORS
--- a/llvm/utils/benchmark/CONTRIBUTORS
+++ b/llvm/utils/benchmark/CONTRIBUTORS
@@ -58,6 +58,7 @@
 Robert Guo <robert.guo@mongodb.com>
 Roman Lebedev <lebedev.ri@gmail.com>
 Shuo Chen <chenshuo@chenshuo.com>
+Steven Wan <wan.yu@ibm.com>
 Tobias Ulvgård <tobias.ulvgard@dirac.se>
 Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
 Yixuan Qiu <yixuanq@gmail.com>
diff --git a/llvm/utils/benchmark/README.LLVM b/llvm/utils/benchmark/README.LLVM
--- a/llvm/utils/benchmark/README.LLVM
+++ b/llvm/utils/benchmark/README.LLVM
@@ -35,3 +35,5 @@
   fixes formatting issues introduced by the preceding change.
 * https://github.com/google/benchmark/commit/ffe1342eb2faa7d2e7c35b4db2ccf99fab81ec20
   is applied to add the CycleTimer implementation for M680x0
+* https://github.com/google/benchmark/commit/d9abf017632be4a00b92cf4289539b353fcea5d2
+  is applied to rename 'mftbl' to 'mftb'.
diff --git a/llvm/utils/benchmark/src/cycleclock.h b/llvm/utils/benchmark/src/cycleclock.h
--- a/llvm/utils/benchmark/src/cycleclock.h
+++ b/llvm/utils/benchmark/src/cycleclock.h
@@ -92,7 +92,7 @@
   uint32_t tbl, tbu0, tbu1;
   asm volatile(
       "mftbu %0\n"
-      "mftbl %1\n"
+      "mftb %1\n"
       "mftbu %2"
       : "=r"(tbu0), "=r"(tbl), "=r"(tbu1));
   tbl &= -static_cast<int32_t>(tbu0 == tbu1);