[Transforms] Use *Set::insert_range (NFC) (#132652)

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, 1 insertions, 2 deletions

diff --git a/llvm/lib/Transforms/Utils/LoopUnroll.cpp b/llvm/lib/Transforms/Utils/LoopUnroll.cpp
index af6f9c2..45b4967 100644
--- a/llvm/lib/Transforms/Utils/LoopUnroll.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUnroll.cpp
@@ -684,8 +684,7 @@ llvm::UnrollLoop(Loop *L, UnrollLoopOptions ULO, LoopInfo *LI,
   // share the same exit blocks). We'll keep track of loops for which we can
   // break this so that later we can re-simplify them.
   SmallSetVector<Loop *, 4> LoopsToSimplify;
-  for (Loop *SubLoop : *L)
-    LoopsToSimplify.insert(SubLoop);
+  LoopsToSimplify.insert_range(*L);
 
   // When a FSDiscriminator is enabled, we don't need to add the multiply
   // factors to the discriminators.