message: Fix saturating_{add,sub} for 8bit and 16bit ints
diff: @@ -513,8 +513,8 @@ pub fn codegen_intrinsic_call<'tcx>(
  let max = fx.bcx.ins().iconst(clif_ty, max);
  let val = match (intrinsic, signed) {
  - ("saturating_add", false) => fx.bcx.ins().select(has_overflow, max, val),
  - ("saturating_sub", false) => fx.bcx.ins().select(has_overflow, min, val),
  + ("saturating_add", false) => codegen_select(&mut fx.bcx, has_overflow, max, val),
  + ("saturating_sub", false) => codegen_select(&mut fx.bcx, has_overflow, min, val),
  ("saturating_add", true) => unimplemented!(),
  ("saturating_sub", true) => unimplemented!(),
  _ => unreachable!(),
  