Document LOAD_INT and add news

Author: markshannon

Doc/library/dis.rst

@@ -1079,6 +1079,14 @@ iterations of the loop.
    Pushes ``co_consts[consti]`` onto the stack.
 
 
+.. opcode:: LOAD_INT (i)
+
+   Pushes the integer ``i`` onto the stack.
+   ``i`` must be in ``range(256)``
+
+   .. versionadded:: 3.14
+
+
 .. opcode:: LOAD_CONST_IMMORTAL (consti)
 
    Pushes ``co_consts[consti]`` onto the stack.

Misc/NEWS.d/next/Core_and_Builtins/2024-10-25-15-56-14.gh-issue-125837.KlCdgD.rst

@@ -0,0 +1,4 @@
+Adds :opcode:`LOAD_INT` and :opcode:`LOAD_CONST_IMMORTAL` instructions.
+``LOAD_INT`` pushes a small integer equal to the ``oparg`` to the stack.
+``LOAD_CONST_IMMORTAL`` does the same as ``LOAD_CONST`` but is more
+efficient for immortal objects.