diff --git a/llvm-12.0.0rc3.src/utils/benchmark/src/cycleclock.h.orig b/llvm-12.0.0rc3.src/utils/benchmark/src/cycleclock.h
--- a/llvm-12.0.0rc3.src/utils/benchmark/src/cycleclock.h.orig
+++ b/llvm-12.0.0rc3.src/utils/benchmark/src/cycleclock.h
@@ -161,12 +161,6 @@
   struct timeval tv;
   gettimeofday(&tv, nullptr);
   return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
-#elif defined(__mips__) || defined(__m68k__)
-  // mips apparently only allows rdtsc for superusers, so we fall
-  // back to gettimeofday.  It's possible clock_gettime would be better.
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
 #elif defined(__s390__) // Covers both s390 and s390x.
   // Return the CPU clock.
   uint64_t tsc;
@@ -194,10 +188,14 @@
   return cycles;
 #endif
 #else
-// The soft failover to a generic implementation is automatic only for ARM.
-// For other platforms the developer is expected to make an attempt to create
-// a fast implementation and use generic version if nothing better is available.
-#error You need to define CycleTimer for your OS and CPU
+  // The soft failover to a generic implementation is automatic only for ARM.
+  // For other platforms the developer is expected to make an attempt to create
+  // a fast implementation and use generic version if nothing better is available.
+  // MIPS apparently only allows rdtsc for superusers, so for it and other
+  // fall back to gettimeofday. It's possible clock_gettime would be better.
+  struct timeval tv;
+  gettimeofday(&tv, nullptr);
+  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
 #endif
 }
 }  // end namespace cycleclock