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Remove is_const_fn in find_mir_or_eval_fn

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This commit is contained in:
Gary Guo 2021-10-27 07:21:17 +01:00
parent cc4345a1c5
commit 223f58085a
1 changed files with 3 additions and 9 deletions
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12
compiler/rustc_const_eval/src/const_eval/machine.rs
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@ -265,24 +265,18 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for CompileTimeInterpreter<'mir,
// Only check non-glue functions
if let ty::InstanceDef::Item(def) = instance.def {
let mut is_const_fn = true;
// Execution might have wandered off into other crates, so we cannot do a stability-
// sensitive check here. But we can at least rule out functions that are not const
// at all.
if !ecx.tcx.is_const_fn_raw(def.did) {
// allow calling functions marked with #[default_method_body_is_const].
if !ecx.tcx.has_attr(def.did, sym::default_method_body_is_const) {
is_const_fn = false;
// We certainly do *not* want to actually call the fn
// though, so be sure we return here.
throw_unsup_format!("calling non-const function `{}`", instance)
}
}
if !is_const_fn {
// We certainly do *not* want to actually call the fn
// though, so be sure we return here.
throw_unsup_format!("calling non-const function `{}`", instance)
}
if let Some(new_instance) = ecx.hook_special_const_fn(instance, args)? {
// We call another const fn instead.
return Self::find_mir_or_eval_fn(ecx, new_instance, _abi, args, _ret, _unwind);