bjoernager/rust
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Add support to intrinsics fallback body

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Before this fix, the call to `body()` would crash, since `has_body()`
would return true, but we would try to retrieve the body of an intrinsic
which is not allowed.

Instead, the `Instance::body()` function will now convert an Intrinsic
into an Item before retrieving its body.
This commit is contained in:
Celina G. Val 2024-04-05 15:10:17 -07:00
parent ea40fa210b
commit 1512d06be9
3 changed files with 149 additions and 34 deletions
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11
compiler/stable_mir/src/mir/mono.rs
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@ -41,13 +41,22 @@ impl Instance {
with(|cx| cx.instance_args(self.def))
}
/// Get the body of an Instance. The body will be eagerly monomorphized.
/// Get the body of an Instance.
///
/// The body will be eagerly monomorphized and all constants will already be evaluated.
///
/// This method will return the intrinsic fallback body if one was defined.
pub fn body(&self) -> Option<Body> {
with(|context| context.instance_body(self.def))
}
/// Check whether this instance has a body available.
///
/// For intrinsics with fallback body, this will return `true`. It is up to the user to decide
/// whether to specialize the intrinsic or to use its fallback body.
///
/// For more information on fallback body, see <https://github.com/rust-lang/rust/issues/93145>.
///
/// This call is much cheaper than `instance.body().is_some()`, since it doesn't try to build
/// the StableMIR body.
pub fn has_body(&self) -> bool {