rust/tests/mir-opt/inline/inline_shims.drop.Inline.panic-abort.diff
Scott McMurray 23c8ed14c9 Avoid MIR bloat in inlining
In 126578 we ended up with more binary size increases than expected.

This change attempts to avoid inlining large things into small things, to avoid that kind of increase, in cases when top-down inlining will still be able to do that inlining later.
2024-07-01 05:17:13 -07:00

61 lines
1.7 KiB
Diff

- // MIR for `drop` before Inline
+ // MIR for `drop` after Inline
fn drop(_1: *mut Vec<A>, _2: *mut Option<B>) -> () {
debug a => _1;
debug b => _2;
let mut _0: ();
let _3: ();
let mut _4: *mut std::vec::Vec<A>;
let mut _5: *mut std::option::Option<B>;
+ scope 1 (inlined std::ptr::drop_in_place::<Vec<A>> - shim(Some(Vec<A>))) {
+ let mut _6: &mut std::vec::Vec<A>;
+ let mut _7: ();
+ }
+ scope 2 (inlined std::ptr::drop_in_place::<Option<B>> - shim(Some(Option<B>))) {
+ let mut _8: isize;
+ let mut _9: isize;
+ }
bb0: {
StorageLive(_3);
StorageLive(_4);
_4 = _1;
- _3 = std::ptr::drop_in_place::<Vec<A>>(move _4) -> [return: bb1, unwind unreachable];
+ StorageLive(_6);
+ StorageLive(_7);
+ _6 = &mut (*_4);
+ _7 = <Vec<A> as Drop>::drop(move _6) -> [return: bb2, unwind unreachable];
}
bb1: {
+ StorageDead(_7);
+ StorageDead(_6);
StorageDead(_4);
StorageDead(_3);
StorageLive(_5);
_5 = _2;
- _0 = std::ptr::drop_in_place::<Option<B>>(move _5) -> [return: bb2, unwind unreachable];
+ StorageLive(_8);
+ StorageLive(_9);
+ _8 = discriminant((*_5));
+ switchInt(move _8) -> [0: bb3, otherwise: bb4];
}
bb2: {
+ drop(((*_4).0: alloc::raw_vec::RawVec<A>)) -> [return: bb1, unwind unreachable];
+ }
+
+ bb3: {
+ StorageDead(_9);
+ StorageDead(_8);
StorageDead(_5);
return;
+ }
+
+ bb4: {
+ drop((((*_5) as Some).0: B)) -> [return: bb3, unwind unreachable];
}
}