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|
- // MIR for `main` before GVN
+ // MIR for `main` after GVN
fn main() -> () {
let mut _0: ();
let _1: std::alloc::Layout;
let mut _2: std::option::Option<std::alloc::Layout>;
let mut _3: *mut u8;
let mut _4: *mut [u8];
let mut _5: std::ptr::NonNull<[u8]>;
let mut _6: std::result::Result<std::ptr::NonNull<[u8]>, std::alloc::AllocError>;
let mut _7: &std::alloc::Global;
let mut _8: std::alloc::Layout;
scope 1 {
debug layout => _1;
let mut _9: &std::alloc::Global;
scope 2 {
debug ptr => _3;
}
scope 5 (inlined <std::alloc::Global as Allocator>::allocate) {
debug self => _9;
debug layout => _1;
}
scope 6 (inlined NonNull::<[u8]>::as_ptr) {
debug self => _5;
let mut _12: *const [u8];
}
}
scope 3 (inlined #[track_caller] Option::<Layout>::unwrap) {
debug self => _2;
let mut _10: isize;
let mut _11: !;
scope 4 {
debug val => _1;
}
}
bb0: {
StorageLive(_2);
- _2 = Option::<Layout>::None;
+ _2 = const Option::<Layout>::None;
StorageLive(_10);
_10 = const 0_isize;
switchInt(const 0_isize) -> [0: bb2, 1: bb4, otherwise: bb3];
}
bb1: {
StorageDead(_6);
StorageLive(_12);
_12 = (_5.0: *const [u8]);
_4 = move _12 as *mut [u8] (PtrToPtr);
StorageDead(_12);
StorageDead(_5);
_3 = move _4 as *mut u8 (PtrToPtr);
StorageDead(_4);
StorageDead(_3);
return;
}
bb2: {
_11 = core::panicking::panic(const "called `Option::unwrap()` on a `None` value") -> unwind continue;
}
bb3: {
unreachable;
}
bb4: {
- _1 = move ((_2 as Some).0: std::alloc::Layout);
+ _1 = const Layout {{ size: Indirect { alloc_id: ALLOC0, offset: Size(8 bytes) }: usize, align: std::ptr::Alignment(Scalar(0x0000000000000000): std::ptr::alignment::AlignmentEnum64) }};
StorageDead(_10);
StorageDead(_2);
StorageLive(_3);
StorageLive(_4);
StorageLive(_5);
StorageLive(_6);
_9 = const _;
- _6 = std::alloc::Global::alloc_impl(_9, _1, const false) -> [return: bb5, unwind continue];
+ _6 = std::alloc::Global::alloc_impl(const {ALLOC1<imm>: &std::alloc::Global}, const Layout {{ size: Indirect { alloc_id: ALLOC0, offset: Size(8 bytes) }: usize, align: std::ptr::Alignment(Scalar(0x0000000000000000): std::ptr::alignment::AlignmentEnum64) }}, const false) -> [return: bb5, unwind continue];
}
bb5: {
_5 = Result::<NonNull<[u8]>, std::alloc::AllocError>::unwrap(move _6) -> [return: bb1, unwind continue];
}
}
+
+ ALLOC0 (size: 16, align: 8) {
+ 00 00 00 00 00 00 00 00 __ __ __ __ __ __ __ __ │ ........░░░░░░░░
+ }
+
+ ALLOC1 (size: 0, align: 1) {}
|
