René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Bytecode compatibility - Normalize Loop/Branch Jump Semantics","articleBody":"## Summary\n\n Background:\n  There are many mismatches involving jumps and stack effects (e.g., LOAD_CONST/\n  JUMP_BACKWARD, JUMP_BACKWARD/JUMP_FORWARD, POP_TOP/CALL, POP_EXC/CALL patterns),\n  suggesting CPython/jump normalization drift.\n\n  Task:\n  - Audit RustPython compiler code generation for branch target calculation and jump\n  lowering.\n  - Ensure jump target normalization matches CPython offset-to-index expectations in dis\n  output.\n  - Verify POP_TOP/JUMP pairing and loop backedge generation around FOR_ITER/while/for\n  comprehensions.\n  - Re-run comparisons focused on core modules and remove false positives caused by\n  different normalization if safe.\n\n  Acceptance criteria:\n  - Diff counts for major jump-related pairs decrease substantially.\n  - Critical loop-heavy modules (`html/entities.py`, `inspect.py`) show improved\n  instruction alignment.\n\n## Details\n\n\u003c!-- Whatever you want to share --\u003e\n","author":{"url":"https://github.com/youknowone","@type":"Person","name":"youknowone"},"datePublished":"2026-04-03T11:42:48.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/20/RustPython/issues/20"}