feat(parser,ir,backend): Fully support func params and disable r0-r3 alloc temporarily

src/ir/types.rs

@@ -116,7 +116,7 @@ impl Display for MoveRValue {
 #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 pub enum VariableType {
     Global,
-    ParamTemp,
+    ParamTemp(usize),
     Local,
     Temp,
 }
@@ -155,7 +155,7 @@ impl Display for Variable {
             VariableType::Global => "@g",
             VariableType::Local => "%l",
             VariableType::Temp => "%t",
-            VariableType::ParamTemp => "%t",
+            VariableType::ParamTemp(_) => "%t",
         };
         write!(f, "{}{}", prefix, self.index)
     }