bjoernager/rust
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Auto merge of #120675 - oli-obk:intrinsics3.0, r=pnkfelix

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Add a scheme for moving away from `extern "rust-intrinsic"` entirely

All `rust-intrinsic`s can become free functions now, either with a fallback body, or with a dummy body and an attribute, requiring backends to actually implement the intrinsic.

This PR demonstrates the dummy-body scheme with the `vtable_size` intrinsic.

cc https://github.com/rust-lang/rust/issues/63585

follow-up to #120500

MCP at https://github.com/rust-lang/compiler-team/issues/720
This commit is contained in:
bors 2024-03-05 00:13:01 +00:00
commit 2eeff462b7
31 changed files with 207 additions and 51 deletions
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4
compiler/rustc_hir_analysis/src/check/check.rs
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@ -527,12 +527,12 @@ pub(crate) fn check_item_type(tcx: TyCtxt<'_>, def_id: LocalDefId) {
check_enum(tcx, def_id);
}
DefKind::Fn => {
if let Some(name) = tcx.intrinsic(def_id) {
if let Some(i) = tcx.intrinsic(def_id) {
intrinsic::check_intrinsic_type(
tcx,
def_id,
tcx.def_ident_span(def_id).unwrap(),
name,
i.name,
Abi::Rust,
)
}