gh-127413: allow to show specialized bytecode via dis CLI

Doc/library/dis.rst

@@ -60,6 +60,8 @@ interpreter.
       The :option:`-P <dis --show-positions>` command-line option
       and the ``show_positions`` argument were added.
 
+      The :option:`-S <dis --specialized>` command-line option is added.
+
 Example: Given the function :func:`!myfunc`::
 
    def myfunc(alist):
@@ -89,7 +91,7 @@ The :mod:`dis` module can be invoked as a script from the command line:
 
 .. code-block:: sh
 
-   python -m dis [-h] [-C] [-O] [-P] [infile]
+   python -m dis [-h] [-C] [-O] [-P] [-S] [infile]
 
 The following options are accepted:
 
@@ -111,6 +113,10 @@ The following options are accepted:
 
    Show positions of instructions in the source code.
 
+.. cmdoption:: -S, --specialized
+
+   Show specialized bytecode.
+
 If :file:`infile` is specified, its disassembled code will be written to stdout.
 Otherwise, disassembly is performed on compiled source code received from stdin.
 

Doc/whatsnew/3.14.rst

@@ -345,6 +345,10 @@ dis
   This feature is also exposed via :option:`dis --show-positions`.
   (Contributed by Bénédikt Tran in :gh:`123165`.)
 
+* Add the :option:`dis --specialized` command-line option to
+  show specialized bytecode.
+  (Contributed by Bénédikt Tran in :gh:`127413`.)
+
 
 fractions
 ---------

Lib/dis.py

@@ -1125,6 +1125,8 @@ def main():
                         help='show instruction offsets')
     parser.add_argument('-P', '--show-positions', action='store_true',
                         help='show instruction positions')
+    parser.add_argument('-S', '--specialized', action='store_true',
+                        help='show specialized bytecode')
     parser.add_argument('infile', nargs='?', default='-')
     args = parser.parse_args()
     if args.infile == '-':
@@ -1135,7 +1137,8 @@ def main():
         with open(args.infile, 'rb') as infile:
             source = infile.read()
     code = compile(source, name, "exec")
-    dis(code, show_caches=args.show_caches, show_offsets=args.show_offsets, show_positions=args.show_positions)
+    dis(code, show_caches=args.show_caches, adaptive=args.specialized,
+        show_offsets=args.show_offsets, show_positions=args.show_positions)
 
 if __name__ == "__main__":
     main()

Misc/NEWS.d/next/Library/2024-11-29-14-45-26.gh-issue-127413.z11AUc.rst

@@ -0,0 +1,2 @@
+Add the :option:`dis --specialized` command-line option to show specialized
+bytecode. Patch by Bénédikt Tran.