Add LOAD_INT instruction

Author: markshannon

Include/internal/pycore_magic_number.h

@@ -261,7 +261,7 @@ Known values:
     Python 3.14a1 3606 (Specialize CALL_KW)
     Python 3.14a1 3607 (Add pseudo instructions JUMP_IF_TRUE/FALSE)
     Python 3.14a1 3608 (Add support for slices)
-    Python 3.14a2 3609 (Break up RETURN_VALUE)
+    Python 3.14a2 3609 (Add LOAD_INT and LOAD_CONST_IMMORTAL instructions)
 
     Python 3.15 will start with 3650
 

Include/internal/pycore_opcode_metadata.h

@@ -674,6 +674,8 @@ def _get_const_value(op, arg, co_consts):
     """
     assert op in hasconst
 
+    if op == LOAD_INT:
+        return arg
     argval = UNKNOWN
     if co_consts is not None:
         argval = co_consts[arg]

Include/internal/pycore_uop_ids.h

@@ -2311,7 +2311,6 @@ def get_load_const(self, tree):
     def test_load_const(self):
         consts = [None,
                   True, False,
-                  124,
                   2.0,
                   3j,
                   "unicode",