fix hash(-1) == hash(-2) collision (#412)

thank you Guildo, I'm confident using Python again

Author: Roger-luo

src/kirin/ir/attrs/py.py

@@ -35,6 +35,9 @@ def __init__(self, data: T, pytype: TypeAttribute | None = None):
             self.type = pytype
 
     def __hash__(self):
+        # Fix hash(-1) == hash(-2) collision
+        if isinstance(self.data, int):
+            return self.data
         return hash(self.data) + hash(self.type)
 
     def print_impl(self, printer: Printer) -> None: