Simplify code by using SmallVector's pop_back_val() instead of

separate back() and pop_back() calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71089 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/Local.cpp

@@ -188,8 +188,7 @@ void llvm::RecursivelyDeleteTriviallyDeadInstructions(Value *V) {
   DeadInsts.push_back(I);
   
   while (!DeadInsts.empty()) {
-    I = DeadInsts.back();
-    DeadInsts.pop_back();
+    I = DeadInsts.pop_back_val();
 
     // Null out all of the instruction's operands to see if any operand becomes
     // dead as we go.