GH-135379: Remove types from stack items in code generator.

[markshannon]

This removes the types from stack items in the code generator.
E.g

op(_SEND_GEN_FRAME, (receiver, v -- receiver, gen_frame: _PyInterpreterFrame *)) {

becomes

op(_SEND_GEN_FRAME, (receiver, v -- receiver, gen_frame) {

and the cast from _PyStackRef to _PyInterpreterFrame * is made explicit in the op definition.

This is a net zero change in terms of code size, but removes fiddly code generator code and replaces it with simple casts.
This also means that any future changes to the code generator, specifically for TOS caching, do not have to worry about inserting casts.

• Issue: Top-of-stack caching in the JIT #135379

[Fidget-Spinner]

Looks good. However, can you add a news entry please? Downstream forks use the DSL now (like Cinder), so I think this should have a news entry. It's also big enough that it warrants it.

[markshannon]

I know Cinder uses it, but it isn't part of any public API and we don't want it to be.
I guess a change note is fine, as long as it doesn't go in "what's new".

[Fidget-Spinner]

Yeah I don't think it should be documented or in What's New either.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x RHEL9 3.x (tier-3) has failed when building commit c87b5b2.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1565/builds/2457) and take a look at the build logs.
4. Check if the failure is related to this commit (c87b5b2) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1565/builds/2457

Failed tests:

• test.test_multiprocessing_fork.test_processes

Failed subtests:

• test_interrupt - test.test_multiprocessing_fork.test_processes.WithProcessesTestProcess.test_interrupt

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/test/_test_multiprocessing.py", line 588, in test_interrupt
exitcode =self._kill_process(multiprocessing.Process.interrupt)
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/test/_test_multiprocessing.py", line 570, in _kill_processself.assertEqual(join(), None)
~~~~^^
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/test/_test_multiprocessing.py", line 250, in __call__returnself.func(*args, **kwds)
~~~~~~~~~^^^^^^^^^^^^^^^
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/multiprocessing/process.py", line 156, in join
res =self._popen.wait(timeout)
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/multiprocessing/popen_fork.py", line 44, in waitreturnself.poll(os.WNOHANGif timeout ==0.0else0)
~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/multiprocessing/popen_fork.py", line 28, in poll
pid, sts = os.waitpid(self.pid, flag)
~~~~~~~~~~^^^^^^^^^^^^^^^^
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/test/_test_multiprocessing.py", line 566, in handlerraiseRuntimeError('join took too long: %s'% p)
RuntimeError: join took too long: <Process name='Process-1' pid=3964973 parent=3964971 started daemon>
Traceback (most recent call last):
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/test/_test_multiprocessing.py", line 588, in test_interrupt
exitcode =self._kill_process(multiprocessing.Process.interrupt)
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/test/_test_multiprocessing.py", line 570, in _kill_processself.assertEqual(join(), None)
~~~~^^
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/test/_test_multiprocessing.py", line 250, in __call__returnself.func(*args, **kwds)
~~~~~~~~~^^^^^^^^^^^^^^^
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/multiprocessing/process.py", line 156, in join
res =self._popen.wait(timeout)
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/multiprocessing/popen_fork.py", line 44, in waitreturnself.poll(os.WNOHANGif timeout ==0.0else0)
~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/multiprocessing/popen_fork.py", line 28, in poll
pid, sts = os.waitpid(self.pid, flag)
~~~~~~~~~~^^^^^^^^^^^^^^^^
File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x/build/Lib/test/_test_multiprocessing.py", line 566, in handlerraiseRuntimeError('join took too long: %s'% p)
RuntimeError: join took too long: <Process name='Process-158' pid=3956945 parent=3954168 started daemon>