error: attribute applied to an invalid target
  --> $DIR/optimize.rs:8:1
   |
LL | #[optimize(speed)]
   | ^^^^^^^^^^^^^^^^^^
LL | struct F;
   | --------- invalid target

error: attribute applied to an invalid target
  --> $DIR/optimize.rs:12:5
   |
LL |       #[optimize(speed)]
   |       ^^^^^^^^^^^^^^^^^^
LL | /     {
LL | |         1
LL | |     };
   | |_____- invalid target

error: attribute applied to an invalid target
  --> $DIR/optimize.rs:21:1
   |
LL | #[optimize(speed)]
   | ^^^^^^^^^^^^^^^^^^
LL | mod valid_module {}
   | ------------------- invalid target

error: attribute applied to an invalid target
  --> $DIR/optimize.rs:24:1
   |
LL | #[optimize(speed)]
   | ^^^^^^^^^^^^^^^^^^
LL | impl F {}
   | --------- invalid target

error: aborting due to 4 previous errors