[llvm] Use *Set::insert_range (NFC) (#133353)

We can use *Set::insert_range to collapse:

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

down to:

  Set.insert_range(llvm::make_first_range(Range));

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

1 files changed, 1 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index 5ec7000..a02daad 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -4370,8 +4370,7 @@ private:
         // If it does not match, collect all Phi nodes from matcher.
         // if we end up with no match, them all these Phi nodes will not match
         // later.
-        for (auto M : Matched)
-          WillNotMatch.insert(M.first);
+        WillNotMatch.insert_range(llvm::make_first_range(Matched));
         Matched.clear();
       }
       if (IsMatched) {