Add _REPLACE_WITH_TRUE to the tier 2 optimizer

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Feature or enhancement

Proposal:

_REPLACE_WITH_TRUE is not currently in the tier 2 optimizer's known list, resulting in some missed opportunities.

To add it, here are the following steps:

1. Add a new bytecode definition _REPLACE_WITH_TRUE in Python/optimizer_bytecodes.c, with the same header as the one in Python/bytecodes.c.
2. The body of the instruction in optimizer_bytecodes.c should say res = sym_new_const(ctx, Py_True);. Meaning that the new value is a new symbolic constant of the value "True".
3. Run make regen-cases on *nix.
4. You can add a test in Lib/test/test_capi/test_opt.py. This is optional, you can choose not to as well.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-128195: Add _REPLACE_WITH_TRUE to the tier2 optimizer #128203

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This is not exactly "easy", but I documented the steps above, and the label is to signal to new contributors :).