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PYTHON_OPT_DEBUG=4 (or higher) should show types on the abstract stack #143946
Description
Feature or enhancement
Proposal:
PYTHON_LLTRACE=4 dumps everything on the stack.
PYTHON_OPT_DEBUG=4 should show everything on the stack, but instead format the symbolic values nicely.
@cocolato would you like to take this up? this is will be quite a useful tool to help us debug the optimizer.
If you don't want to take this up, it's also fine.
Has this already been discussed elsewhere?
No response given
Links to previous discussion of this feature:
No response
Activity
cocolato commentedon Jan 17, 2026
Thank you for your trust. I will work on this.
cocolato commentedon Jan 17, 2026
Currently, stack details are only output when
PYTHON_LLTRACE> 4. Therefore, I think we should print the_JitSymTypein stack/locals whenPYTHON_OPT_DEBUG> 4?Fidget-Spinner commentedon Jan 17, 2026
Correct. We should do something like that
gh-143946: Show `JitOptSymbol` on abstract stack when set PYTHON_OPT_…
gh-143946: Add more debug info in `optimize_uops` (GH-144262)
pythongh-143946: Show `JitOptSymbol` on abstract stack when set PYTHO…
pythongh-143946: Add more debug info in `optimize_uops` (pythonGH-144262