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- // MIR for `test` before GVN
+ // MIR for `test` after GVN
fn test() -> () {
let mut _0: ();
let _1: &std::boxed::Box<()>;
let _2: &std::boxed::Box<()>;
let _3: std::boxed::Box<()>;
let mut _6: *const ();
let mut _8: *const [()];
let mut _9: std::boxed::Box<()>;
let mut _10: *const ();
let mut _11: usize;
scope 1 {
debug vp_ctx => _1;
let _4: *const ();
scope 2 {
debug slf => _10;
let _5: *const [()];
scope 3 {
debug bytes => _5;
let _7: *mut ();
scope 4 {
debug _x => _7;
}
scope 7 (inlined foo) {
}
}
scope 5 (inlined slice_from_raw_parts::<()>) {
scope 6 (inlined std::ptr::from_raw_parts::<[()], ()>) {
}
}
}
}
bb0: {
StorageLive(_1);
StorageLive(_2);
StorageLive(_3);
_3 = Box::<()>::new(const ()) -> [return: bb1, unwind continue];
}
bb1: {
_2 = &_3;
_1 = copy _2;
StorageDead(_2);
StorageLive(_4);
- _9 = deref_copy _3;
+ _9 = copy _3;
_10 = copy ((_9.0: std::ptr::Unique<()>).0: std::ptr::NonNull<()>) as *const () (Transmute);
_4 = copy _10;
- StorageLive(_5);
+ nop;
StorageLive(_6);
- _6 = copy _4;
+ _6 = copy _10;
StorageLive(_11);
_11 = const 1_usize;
- _5 = *const [()] from (copy _6, copy _11);
+ _5 = *const [()] from (copy _10, const 1_usize);
StorageDead(_11);
StorageDead(_6);
StorageLive(_7);
StorageLive(_8);
_8 = copy _5;
- _7 = copy _8 as *mut () (PtrToPtr);
+ _7 = copy ((_9.0: std::ptr::Unique<()>).0: std::ptr::NonNull<()>) as *mut () (Transmute);
StorageDead(_8);
StorageDead(_7);
- StorageDead(_5);
+ nop;
StorageDead(_4);
drop(_3) -> [return: bb2, unwind: bb3];
}
bb2: {
StorageDead(_3);
StorageDead(_1);
return;
}
bb3 (cleanup): {
resume;
}
}
|
