Use Place directly in evaluate_array_len, it's Copy

Author: spastorino

src/librustc_codegen_ssa/mir/rvalue.rs

@@ -400,7 +400,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                 self.codegen_place_to_pointer(bx, place, mk_ptr)
             }
 
-            mir::Rvalue::Len(ref place) => {
+            mir::Rvalue::Len(place) => {
                 let size = self.evaluate_array_len(&mut bx, place);
                 let operand = OperandRef {
                     val: OperandValue::Immediate(size),
@@ -537,7 +537,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         }
     }
 
-    fn evaluate_array_len(&mut self, bx: &mut Bx, place: &mir::Place<'tcx>) -> Bx::Value {
+    fn evaluate_array_len(&mut self, bx: &mut Bx, place: mir::Place<'tcx>) -> Bx::Value {
         // ZST are passed as operands and require special handling
         // because codegen_place() panics if Local is operand.
         if let Some(index) = place.as_local() {