Index: lib/Support/Host.cpp
===================================================================
--- lib/Support/Host.cpp
+++ lib/Support/Host.cpp
@@ -476,7 +476,11 @@
     // Skylake:
     case 0x4e:
       *Type = INTEL_COREI7; // "skylake-avx512"
-      *Subtype = INTEL_COREI7_SKYLAKE_AVX512;
+      if (Features & (1 << FEATURE_AVX512)) {
+        *Subtype = INTEL_COREI7_SKYLAKE_AVX512;
+      } else {
+        *Subtype = INTEL_COREI7_SKYLAKE;
+      }
       break;
     case 0x5e:
       *Type = INTEL_COREI7; // "skylake"