add FuncTranslator::pin_label utility method

Author: Robbepop

crates/wasmi/src/engine/translator/func2/mod.rs

@@ -30,7 +30,7 @@ use self::{
 use crate::{
     core::{FuelCostsProvider, Typed, TypedVal, ValType},
     engine::{
-        translator::{Instr, LabelRegistry, WasmTranslator},
+        translator::{Instr, LabelRef, LabelRegistry, WasmTranslator},
         BlockType,
         CompiledFuncEntity,
         TranslationError,
@@ -279,6 +279,13 @@ impl FuncTranslator {
         Ok(())
     }
 
+    /// Pins the `label` to the next [`Instr`].
+    fn pin_label(&mut self, label: LabelRef) {
+        self.labels
+            .pin_label(label, self.instrs.next_instr())
+            .unwrap_or_else(|err| panic!("failed to pin label to next instruction: {err}"));
+    }
+
     /// Convert the [`Operand`] at `depth` into an [`Operand::Temp`] by copying if necessary.
     ///
     /// # Note