Update src/tools/miri/src/shims/intrinsics/mod.rs

Co-authored-by: Ralf Jung <post@ralfj.de>

Author: oli-obk

src/tools/miri/src/shims/intrinsics/mod.rs

@@ -64,6 +64,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
 
         // The rest jumps to `ret` immediately.
         if !this.emulate_intrinsic_by_name(intrinsic_name, instance.args, args, dest)? {
+            // We haven't handled the intrinsic, let's see if we can use a fallback body.
             if this.tcx.intrinsic(instance.def_id()).unwrap().must_be_overridden {
                 throw_unsup_format!("unimplemented intrinsic: `{intrinsic_name}`")
             }