mirror of https://github.com/rust-lang/rust
103 lines
3.4 KiB
Diff
103 lines
3.4 KiB
Diff
- // 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) {
|
|
}
|
|
scope 6 (inlined NonNull::<[u8]>::as_ptr) {
|
|
let mut _12: *const [u8];
|
|
}
|
|
}
|
|
scope 3 (inlined #[track_caller] Option::<Layout>::unwrap) {
|
|
let mut _10: isize;
|
|
let mut _11: !;
|
|
scope 4 {
|
|
}
|
|
}
|
|
|
|
bb0: {
|
|
- StorageLive(_1);
|
|
+ nop;
|
|
StorageLive(_2);
|
|
- _2 = Option::<Layout>::None;
|
|
+ _2 = const Option::<Layout>::None;
|
|
StorageLive(_10);
|
|
- _10 = discriminant(_2);
|
|
- switchInt(move _10) -> [0: bb3, 1: bb4, otherwise: bb2];
|
|
+ _10 = const 0_isize;
|
|
+ switchInt(const 0_isize) -> [0: bb3, 1: bb4, otherwise: bb2];
|
|
}
|
|
|
|
bb1: {
|
|
StorageDead(_6);
|
|
- StorageLive(_12);
|
|
+ nop;
|
|
_12 = copy (_5.0: *const [u8]);
|
|
- _4 = move _12 as *mut [u8] (PtrToPtr);
|
|
- StorageDead(_12);
|
|
+ _4 = copy _12 as *mut [u8] (PtrToPtr);
|
|
+ nop;
|
|
StorageDead(_5);
|
|
- _3 = move _4 as *mut u8 (PtrToPtr);
|
|
+ _3 = copy _12 as *mut u8 (PtrToPtr);
|
|
StorageDead(_4);
|
|
StorageDead(_3);
|
|
- StorageDead(_1);
|
|
+ nop;
|
|
return;
|
|
}
|
|
|
|
bb2: {
|
|
unreachable;
|
|
}
|
|
|
|
bb3: {
|
|
_11 = option::unwrap_failed() -> unwind continue;
|
|
}
|
|
|
|
bb4: {
|
|
- _1 = move ((_2 as Some).0: std::alloc::Layout);
|
|
+ _1 = const Layout {{ size: Indirect { alloc_id: ALLOC0, offset: Size(4 bytes) }: usize, align: std::ptr::Alignment(Scalar(0x00000000): std::ptr::alignment::AlignmentEnum) }};
|
|
StorageDead(_10);
|
|
StorageDead(_2);
|
|
StorageLive(_3);
|
|
StorageLive(_4);
|
|
StorageLive(_5);
|
|
StorageLive(_6);
|
|
StorageLive(_7);
|
|
_9 = const main::promoted[0];
|
|
_7 = copy _9;
|
|
StorageLive(_8);
|
|
- _8 = copy _1;
|
|
- _6 = std::alloc::Global::alloc_impl(move _7, move _8, const false) -> [return: bb5, unwind continue];
|
|
+ _8 = const Layout {{ size: Indirect { alloc_id: ALLOC0, offset: Size(4 bytes) }: usize, align: std::ptr::Alignment(Scalar(0x00000000): std::ptr::alignment::AlignmentEnum) }};
|
|
+ _6 = std::alloc::Global::alloc_impl(copy _9, const Layout {{ size: Indirect { alloc_id: ALLOC0, offset: Size(4 bytes) }: usize, align: std::ptr::Alignment(Scalar(0x00000000): std::ptr::alignment::AlignmentEnum) }}, const false) -> [return: bb5, unwind continue];
|
|
}
|
|
|
|
bb5: {
|
|
StorageDead(_8);
|
|
StorageDead(_7);
|
|
_5 = Result::<NonNull<[u8]>, std::alloc::AllocError>::unwrap(move _6) -> [return: bb1, unwind continue];
|
|
}
|
|
+ }
|
|
+
|
|
+ ALLOC0 (size: 8, align: 4) {
|
|
+ 00 00 00 00 __ __ __ __ │ ....░░░░
|
|
}
|
|
|