diff --git a/include/llvm/Support/PathV1.h b/include/llvm/Support/PathV1.h
index 9bce3becf46..4a4816bd8dc 100644
--- a/include/llvm/Support/PathV1.h
+++ b/include/llvm/Support/PathV1.h
@@ -219,13 +219,6 @@ namespace sys {
     /// @name Disk Accessors
     /// @{
     public:
-      /// This function determines if the path name is absolute, as opposed to
-      /// relative.
-      /// @brief Determine if the path is absolute.
-      LLVM_ATTRIBUTE_DEPRECATED(
-        static bool isAbsolute(const char *NameStart, unsigned NameLen),
-        LLVM_PATH_DEPRECATED_MSG(path::is_absolute));
-
       /// This function opens the file associated with the path name provided by
       /// the Path object and reads its magic number. If the magic number at the
       /// start of the file matches \p magic, true is returned. In all other
diff --git a/lib/Support/Unix/Path.inc b/lib/Support/Unix/Path.inc
index ea8a050accf..ecdc2abe3a8 100644
--- a/lib/Support/Unix/Path.inc
+++ b/lib/Support/Unix/Path.inc
@@ -109,14 +109,6 @@ Path::isValid() const {
   return !path.empty();
 }
 
-bool
-Path::isAbsolute(const char *NameStart, unsigned NameLen) {
-  assert(NameStart);
-  if (NameLen == 0)
-    return false;
-  return NameStart[0] == '/';
-}
-
 Path
 Path::GetTemporaryDirectory(std::string *ErrMsg) {
 #if defined(HAVE_MKDTEMP)
diff --git a/lib/Support/Windows/Path.inc b/lib/Support/Windows/Path.inc
index 7cf522d22ed..165c18f0a53 100644
--- a/lib/Support/Windows/Path.inc
+++ b/lib/Support/Windows/Path.inc
@@ -150,24 +150,6 @@ void Path::makeAbsolute() {
   }
 }
 
-bool
-Path::isAbsolute(const char *NameStart, unsigned NameLen) {
-  assert(NameStart);
-  // FIXME: This does not handle correctly an absolute path starting from
-  // a drive letter or in UNC format.
-  switch (NameLen) {
-  case 0:
-    return false;
-  case 1:
-  case 2:
-    return NameStart[0] == '/';
-  default:
-    return
-      (NameStart[0] == '/' || (NameStart[1] == ':' && NameStart[2] == '/')) ||
-      (NameStart[0] == '\\' || (NameStart[1] == ':' && NameStart[2] == '\\'));
-  }
-}
-
 static Path *TempDirectory;
 
 Path