[llvm] Use *Set::insert_range (NFC) (#133041)

We can use *Set::insert_range to collapse:

  for (auto Elem : Range)
    Set.insert(E);

down to:

  Set.insert_range(Range);

In some cases, we can further fold that into the set declaration.

1 files changed, 4 insertions, 8 deletions

diff --git a/llvm/lib/FileCheck/FileCheck.cpp b/llvm/lib/FileCheck/FileCheck.cpp
index 072dbef..10ca5f4 100644
--- a/llvm/lib/FileCheck/FileCheck.cpp
+++ b/llvm/lib/FileCheck/FileCheck.cpp
@@ -2491,14 +2491,10 @@ static bool ValidatePrefixes(StringRef Kind, StringSet<> &UniquePrefixes,
 bool FileCheck::ValidateCheckPrefixes() {
   StringSet<> UniquePrefixes;
   // Add default prefixes to catch user-supplied duplicates of them below.
-  if (Req.CheckPrefixes.empty()) {
-    for (const char *Prefix : DefaultCheckPrefixes)
-      UniquePrefixes.insert(Prefix);
-  }
-  if (Req.CommentPrefixes.empty()) {
-    for (const char *Prefix : DefaultCommentPrefixes)
-      UniquePrefixes.insert(Prefix);
-  }
+  if (Req.CheckPrefixes.empty())
+    UniquePrefixes.insert_range(DefaultCheckPrefixes);
+  if (Req.CommentPrefixes.empty())
+    UniquePrefixes.insert_range(DefaultCommentPrefixes);
   // Do not validate the default prefixes, or diagnostics about duplicates might
   // incorrectly indicate that they were supplied by the user.
   if (!ValidatePrefixes("check", UniquePrefixes, Req.CheckPrefixes))