fix: 修复 switch case 标签冲突与大 switch 寄存器回绕

crates/oxide_compiler/src/compiler.rs

@@ -45,7 +45,7 @@ pub(crate) enum Label {
     ForInStart(u32),
     ForInEnd(u32),
     SwitchEnd(u32),
-    SwitchCase(u32),
+    SwitchCase(u32, u32),
     CatchBody(u32),
     FinallyBody(u32),
     TryEnd(u32),
@@ -111,6 +111,14 @@ impl CompileCtx {
         self.label_counter = 0;
     }
 
+    pub(crate) fn reg_checkpoint(&self) -> u8 {
+        self.next_reg
+    }
+
+    pub(crate) fn restore_reg_checkpoint(&mut self, checkpoint: u8) {
+        self.next_reg = checkpoint;
+    }
+
     pub(crate) fn add_constant(&mut self, c: Constant) -> u16 {
         if let Some(idx) = self.constants.iter().position(|x| x == &c) {
             return idx as u16;