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Unify intrinsics body handling in StableMIR

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rust-lang/rust#120675 introduced a new mechanism to declare intrinsics
which will potentially replace the rust-intrinsic ABI.

The new mechanism introduces a placeholder body and mark the intrinsic
with #[rustc_intrinsic_must_be_overridden].
In practice, this means that backends should not generate code for the
placeholder, and shim the intrinsic.
The new annotation is an internal compiler implementation,
and it doesn't need to be exposed to StableMIR users.

In this PR, intrinsics marked with `rustc_intrinsic_must_be_overridden`
are handled the same way as intrinsics that do not have a body.
This commit is contained in:
Celina G. Val 2024-06-12 16:01:38 -07:00
parent 0285dab54f
commit c8c6598f17
5 changed files with 42 additions and 25 deletions
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4
compiler/stable_mir/src/compiler_interface.rs
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@ -94,10 +94,6 @@ pub trait Context {
/// Retrieve the plain function name of an intrinsic.
fn intrinsic_name(&self, def: IntrinsicDef) -> Symbol;
/// Returns whether the intrinsic has no meaningful body and all backends
/// need to shim all calls to it.
fn intrinsic_must_be_overridden(&self, def: IntrinsicDef) -> bool;
/// Retrieve the closure signature for the given generic arguments.
fn closure_sig(&self, args: &GenericArgs) -> PolyFnSig;