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Use `stack_effect_info` for getting pop&push count by ShaharNaveh · Pull Request #6913 · RustPython/RustPython · GitHub

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Use stack_effect_info for getting pop&push count - #6913

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youknowone merged 3 commits into
RustPython:mainfrom
ShaharNaveh:after-split-cleanup
Jan 31, 2026
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Use stack_effect_info for getting pop&push count#6913
youknowone merged 3 commits into
RustPython:mainfrom
ShaharNaveh:after-split-cleanup

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ShaharNaveh commented Jan 31, 2026 •
edited by coderabbitai Bot
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Followup on #6893

Summary by CodeRabbit

  • Refactor
    • Streamlined internal code generation logic to improve maintainability and reduce code duplication. No changes to user-facing functionality or APIs.

✏️ Tip: You can customize this high-level summary in your review settings.

coderabbitai Bot commented Jan 31, 2026 •
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Important

Review skipped

Review was skipped due to path filters

⛔ Files ignored due to path filters (1)
  • crates/codegen/src/snapshots/rustpython_codegen__compile__tests__nested_double_async_with.snap is excluded by !**/*.snap

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📝 Walkthrough

Walkthrough

The PR refactors stack effect computation in the codegen IR by replacing manual per-instruction decomposition with a unified stack_effect_info-based approach, reducing code complexity by 54 lines while maintaining existing behavior including underflow handling and LOAD_FAST optimization tracking.

Changes

Cohort / File(s) Summary
Stack Effect Refactoring
crates/codegen/src/ir.rs		 Replaces extensive per-instruction pop/push mappings with unified stack_effect_info-derived pushes/pops computation. Removes large match statements for BinaryOp, LoadAttr, Call and other instructions. Updates variable naming from (pops, pushes) to (pushes, pops) while preserving downstream underflow handling and NOT_LOCAL-based LOAD_FAST optimization tracking.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

Suggested reviewers

  • youknowone

Poem

🐰 Stack effects need not be verbose and grand,
Unite the wisdom, simplify the stand!
Fifty-four lines vanish, yet the logic stays,
A cleaner IR shines through the codegen maze! ✨

🚥 Pre-merge checks | ✅ 3 ✅ Passed checks (3 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title 'Use stack_effect_info for getting pop&push count' clearly and specifically describes the main refactoring change: replacing manual stack effect decomposition with the stack_effect_info-based approach.
Docstring Coverage ✅ Passed Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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youknowone enabled auto-merge (squash) January 31, 2026 08:58
youknowone disabled auto-merge January 31, 2026 14:45
youknowone merged commit c771427 into RustPython:main Jan 31, 2026
23 of 24 checks passed
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