entry/exception/interrupt: reduce namespace pollution when using static mut

this changes code generation of code like this:

``` rust
 #[entry]
fn main() -> ! {
    static mut FOO: u32 = 0;

    // ..
}
```

from this:

``` rust
fn main() -> ! {
    static mut FOO_: u32 = 0;

    let FOO: &'static mut u32 = unsafe { &mut FOO_ };

    // ..
}
```

to this:

``` rust
fn main() -> ! {
    let FOO: &'static mut u32 = unsafe {
        static mut FOO: u32 = 0;

        &mut FOO;
    };

    // ..
}
```

this completely hides the `static mut` variable. Before it was possible to
(unsafely) access it via `${ident}_` (e.g. `FOO_`).

0 files changed, 0 insertions, 0 deletions