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

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This commit is contained in:
Oli Scherer 2024-02-19 17:35:12 +00:00
parent f2612daf58
commit 1e57df1969
16 changed files with 131 additions and 8 deletions
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4
compiler/rustc_mir_transform/src/cross_crate_inline.rs
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@ -23,6 +23,10 @@ fn cross_crate_inlinable(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool {
return false;
}
if tcx.has_attr(def_id, sym::rustc_intrinsic_must_be_overridden) {
return false;
}
// This just reproduces the logic from Instance::requires_inline.
match tcx.def_kind(def_id) {
DefKind::Ctor(..) | DefKind::Closure => return true,

6
compiler/rustc_mir_transform/src/lib.rs
View file

@ -632,6 +632,12 @@ fn optimized_mir(tcx: TyCtxt<'_>, did: LocalDefId) -> &Body<'_> {
}
fn inner_optimized_mir(tcx: TyCtxt<'_>, did: LocalDefId) -> Body<'_> {
if let Some(attr) = tcx.get_attr(did, sym::rustc_intrinsic_must_be_overridden) {
span_bug!(
attr.span,
"this intrinsic must be overridden by the codegen backend, it has no meaningful body",
)
}
if tcx.is_constructor(did.to_def_id()) {
// There's no reason to run all of the MIR passes on constructors when
// we can just output the MIR we want directly. This also saves const