don't use .into() to convert types into identical types.

example:
    let s: String = format!("hello").into();

2 files changed, 2 insertions, 3 deletions

diff --git a/src/librustc_codegen_ssa/mir/operand.rs b/src/librustc_codegen_ssa/mir/operand.rs
index 07c8829e7d8..af95450935c 100644
--- a/src/librustc_codegen_ssa/mir/operand.rs
+++ b/src/librustc_codegen_ssa/mir/operand.rs
@@ -92,8 +92,7 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
                 let a = Scalar::from(Pointer::new(
                     bx.tcx().alloc_map.lock().create_memory_alloc(data),
                     Size::from_bytes(start as u64),
-                ))
-                .into();
+                ));
                 let a_llval = bx.scalar_to_backend(
                     a,
                     a_scalar,
diff --git a/src/librustc_codegen_ssa/mir/rvalue.rs b/src/librustc_codegen_ssa/mir/rvalue.rs
index 2f83298741a..6d004606398 100644
--- a/src/librustc_codegen_ssa/mir/rvalue.rs
+++ b/src/librustc_codegen_ssa/mir/rvalue.rs
@@ -387,7 +387,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
 
             mir::Rvalue::AddressOf(mutability, ref place) => {
                 let mk_ptr = move |tcx: TyCtxt<'tcx>, ty: Ty<'tcx>| {
-                    tcx.mk_ptr(ty::TypeAndMut { ty, mutbl: mutability.into() })
+                    tcx.mk_ptr(ty::TypeAndMut { ty, mutbl: mutability })
                 };
                 self.codegen_place_to_pointer(bx, place, mk_ptr)
             }