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Refactor checking function target features during const-eval

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* Split into its own function
* Do not build a `Vec` of unavailable features
This commit is contained in:
Eduardo Sánchez Muñoz 2023-07-16 16:07:55 +02:00
parent 3e8ce42d42
commit ae2a72deaa
1 changed files with 29 additions and 18 deletions
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47
compiler/rustc_const_eval/src/interpret/terminator.rs
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@ -503,24 +503,10 @@ pub(crate) fn eval_fn_call(
}
}
let attrs = self.tcx.codegen_fn_attrs(instance.def_id());
let missing_features: Vec<_> = attrs
.target_features
.iter()
.copied()
.filter(|feature| !self.tcx.sess.target_features.contains(feature))
.collect();
if !missing_features.is_empty() {
let mut missing_features_str = String::from(missing_features[0].as_str());
for missing_feature in missing_features[1..].iter() {
missing_features_str.push(',');
missing_features_str.push_str(missing_feature.as_str());
}
throw_ub_custom!(
fluent::const_eval_unavailable_target_features_for_fn,
unavailable_feats = missing_features_str,
);
}
// Check that all target features required by the callee (i.e., from
// the attribute `#[target_feature(enable = ...)]`) are enabled at
// compile time.
self.check_fn_target_features(instance)?;
if !callee_fn_abi.can_unwind {
// The callee cannot unwind, so force the `Unreachable` unwind handling.
@ -805,6 +791,31 @@ pub(crate) fn eval_fn_call(
}
}
fn check_fn_target_features(&self, instance: ty::Instance<'tcx>) -> InterpResult<'tcx, ()> {
let attrs = self.tcx.codegen_fn_attrs(instance.def_id());
if attrs
.target_features
.iter()
.any(|feature| !self.tcx.sess.target_features.contains(feature))
{
throw_ub_custom!(
fluent::const_eval_unavailable_target_features_for_fn,
unavailable_feats = attrs
.target_features
.iter()
.filter(|&feature| !self.tcx.sess.target_features.contains(feature))
.fold(String::new(), |mut s, feature| {
if !s.is_empty() {
s.push_str(", ");
}
s.push_str(feature.as_str());
s
}),
);
}
Ok(())
}
fn drop_in_place(
&mut self,
place: &PlaceTy<'tcx, M::Provenance>,