Avoid a temporary stackslot in codegen_checked_int_binop

Author: bjorn3

src/num.rs

@@ -328,18 +328,11 @@ pub(crate) fn codegen_checked_int_binop<'tcx>(
 
     let has_overflow = fx.bcx.ins().bint(types::I8, has_overflow);
 
-    // FIXME directly write to result place instead
-    let out_place = CPlace::new_stack_slot(
-        fx,
-        fx.layout_of(
-            fx.tcx
-                .mk_tup([in_lhs.layout().ty, fx.tcx.types.bool].iter()),
-        ),
+    let out_layout = fx.layout_of(
+        fx.tcx
+            .mk_tup([in_lhs.layout().ty, fx.tcx.types.bool].iter()),
     );
-    let out_layout = out_place.layout();
-    out_place.write_cvalue(fx, CValue::by_val_pair(res, has_overflow, out_layout));
-
-    out_place.to_cvalue(fx)
+    CValue::by_val_pair(res, has_overflow, out_layout)
 }
 
 pub(crate) fn codegen_float_binop<'tcx>(