eliminate a temporary vector


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33695 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bytecode/Reader/Reader.cpp b/lib/Bytecode/Reader/Reader.cpp
index 718ba3e..3c72d63 100644
--- a/lib/Bytecode/Reader/Reader.cpp
+++ b/lib/Bytecode/Reader/Reader.cpp
@@ -1171,8 +1171,8 @@
       if (Handler) Handler->handleConstantExpression(Opcode, ArgVec, Result);
       return Result;
     } else if (Opcode == Instruction::GetElementPtr) { // GetElementPtr
-      std::vector<Constant*> IdxList(ArgVec.begin()+1, ArgVec.end());
-      Constant *Result = ConstantExpr::getGetElementPtr(ArgVec[0], IdxList);
+      Constant *Result = ConstantExpr::getGetElementPtr(ArgVec[0], &ArgVec[1],
+                                                        ArgVec.size()-1);
       if (Handler) Handler->handleConstantExpression(Opcode, ArgVec, Result);
       return Result;
     } else if (Opcode == Instruction::Select) {