56 lines
1.5 KiB
Diff
56 lines
1.5 KiB
Diff
- // MIR for `main` before GVN
|
|
+ // MIR for `main` after GVN
|
|
|
|
fn main() -> () {
|
|
let mut _0: ();
|
|
let _1: i32;
|
|
let mut _2: i32;
|
|
let mut _3: std::boxed::Box<i32>;
|
|
let mut _4: usize;
|
|
let mut _5: usize;
|
|
let mut _6: *mut u8;
|
|
let mut _7: std::boxed::Box<i32>;
|
|
let mut _8: *const i32;
|
|
let mut _9: *const i32;
|
|
scope 1 {
|
|
debug x => _1;
|
|
}
|
|
|
|
bb0: {
|
|
StorageLive(_1);
|
|
- StorageLive(_2);
|
|
+ nop;
|
|
StorageLive(_3);
|
|
- _4 = SizeOf(i32);
|
|
- _5 = AlignOf(i32);
|
|
- _6 = alloc::alloc::exchange_malloc(move _4, move _5) -> [return: bb1, unwind unreachable];
|
|
+ _4 = const 4_usize;
|
|
+ _5 = const 4_usize;
|
|
+ _6 = alloc::alloc::exchange_malloc(const 4_usize, const 4_usize) -> [return: bb1, unwind unreachable];
|
|
}
|
|
|
|
bb1: {
|
|
StorageLive(_7);
|
|
_7 = ShallowInitBox(move _6, i32);
|
|
_8 = copy (((_7.0: std::ptr::Unique<i32>).0: std::ptr::NonNull<i32>).0: *const i32);
|
|
(*_8) = const 42_i32;
|
|
_3 = move _7;
|
|
StorageDead(_7);
|
|
_9 = copy (((_3.0: std::ptr::Unique<i32>).0: std::ptr::NonNull<i32>).0: *const i32);
|
|
_2 = copy (*_9);
|
|
- _1 = Add(move _2, const 0_i32);
|
|
- StorageDead(_2);
|
|
+ _1 = copy _2;
|
|
+ nop;
|
|
drop(_3) -> [return: bb2, unwind unreachable];
|
|
}
|
|
|
|
bb2: {
|
|
StorageDead(_3);
|
|
_0 = const ();
|
|
StorageDead(_1);
|
|
return;
|
|
}
|
|
}
|
|
|