Simplify code. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169198 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/ResourcePriorityQueue.cpp

@@ -604,10 +604,8 @@ SUnit *ResourcePriorityQueue::pop() {
   std::vector<SUnit *>::iterator Best = Queue.begin();
   if (!DisableDFASched) {
     signed BestCost = SUSchedulingCost(*Best);
-    for (std::vector<SUnit *>::iterator I = Queue.begin(),
+    for (std::vector<SUnit *>::iterator I = llvm::next(Queue.begin()),
            E = Queue.end(); I != E; ++I) {
-      if (*I == *Best)
-        continue;
 
       if (SUSchedulingCost(*I) > BestCost) {
         BestCost = SUSchedulingCost(*I);