Support/PathV2: Change most functions in the path namespace to return their work
via their return value instead of an out parameter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121149 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Support/Path.cpp b/unittests/Support/Path.cpp
index 016a7cd..fb4d2bc 100644
--- a/unittests/Support/Path.cpp
+++ b/unittests/Support/Path.cpp
@@ -83,24 +83,22 @@
     outs() << "]\n";
 #endif
 
-    bool      bres;
-    StringRef sfres;
-    path::has_root_path(*i, bres);
-    path::root_path(*i, sfres);
-    path::has_root_name(*i, bres);
-    path::root_name(*i, sfres);
-    path::has_root_directory(*i, bres);
-    path::root_directory(*i, sfres);
-    path::has_parent_path(*i, bres);
-    path::parent_path(*i, sfres);
-    path::has_filename(*i, bres);
-    path::filename(*i, sfres);
-    path::has_stem(*i, bres);
-    path::stem(*i, sfres);
-    path::has_extension(*i, bres);
-    path::extension(*i, sfres);
-    path::is_absolute(*i, bres);
-    path::is_relative(*i, bres);
+    path::has_root_path(*i);
+    path::root_path(*i);
+    path::has_root_name(*i);
+    path::root_name(*i);
+    path::has_root_directory(*i);
+    path::root_directory(*i);
+    path::has_parent_path(*i);
+    path::parent_path(*i);
+    path::has_filename(*i);
+    path::filename(*i);
+    path::has_stem(*i);
+    path::stem(*i);
+    path::has_extension(*i);
+    path::extension(*i);
+    path::is_absolute(*i);
+    path::is_relative(*i);
 
     SmallString<16> temp_store;
     temp_store = *i;
@@ -111,8 +109,8 @@
     temp_store = *i;
     path::replace_extension(temp_store, "ext");
     StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
-    path::stem(filename, stem);
-    path::extension(filename, ext);
+    stem = path::stem(filename);
+    ext  = path::extension(filename);
     EXPECT_EQ(*(--sys::path::end(filename)), (stem + ext).str());
 
     path::native(*i, temp_store);