[Vectorize] Avoid repeated hash lookups (NFC) (#131962)

Author: kazutakahirata

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -3084,7 +3084,7 @@ void LoopVectorizationCostModel::collectLoopScalars(ElementCount VF) {
   // since that would result in generation of scalarized code during execution,
   // which is not supported for scalable vectors.
   if (VF.isScalable()) {
-    Scalars[VF].insert(Uniforms[VF].begin(), Uniforms[VF].end());
+    Scalars[VF].insert_range(Uniforms[VF]);
     return;
   }
 
@@ -3151,7 +3151,7 @@ void LoopVectorizationCostModel::collectLoopScalars(ElementCount VF) {
   //
   // (1) Add to the worklist all instructions that have been identified as
   // uniform-after-vectorization.
-  Worklist.insert(Uniforms[VF].begin(), Uniforms[VF].end());
+  Worklist.insert_range(Uniforms[VF]);
 
   // (2) Add to the worklist all bitcast and getelementptr instructions used by
   // memory accesses requiring a scalar use. The pointer operands of loads and