Index: include/llvm/ADT/Triple.h
===================================================================
--- include/llvm/ADT/Triple.h
+++ include/llvm/ADT/Triple.h
@@ -239,7 +239,9 @@
 
   /// Default constructor is the same as an empty string and leaves all
   /// triple fields unknown.
-  Triple() : Data(), Arch(), Vendor(), OS(), Environment(), ObjectFormat() {}
+  Triple()
+      : Data(), Arch(), SubArch(), Vendor(), OS(), Environment(),
+        ObjectFormat() {}
 
   explicit Triple(const Twine &Str);
   Triple(const Twine &ArchStr, const Twine &VendorStr, const Twine &OSStr);