Index: lib/Support/Path.cpp
===================================================================
--- lib/Support/Path.cpp
+++ lib/Support/Path.cpp
@@ -384,7 +384,7 @@
   const_iterator b = begin(path),
                  e = end(path);
   if (b != e) {
-    bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
+    bool has_sep = is_separator((*b)[0]);
     bool has_drive =
 #ifdef LLVM_ON_WIN32
       b->endswith(":");
@@ -392,7 +392,7 @@
       false;
 #endif
 
-    if (has_net || has_drive) {
+    if (has_sep || has_drive) {
       // just {C:,//net}, return the first component.
       return *b;
     }