proof: add div expression helper bridges#2181
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OpenCodeReview first-pass review
Status: success · Mode: medium-lean · 0 finding(s) · 2 files · 199069 tokens · 19 tool calls
No comments generated. Looks good to me.
OCR pilot metrics
- Routing: medium-lean (router-v8)
- Changed files: 2 supported / 2 total; Lean 2, trust docs 0, workflow/scripts 0, contracts 0, docs 0
- Changed lines: 255 supported; thresholds large Lean >=3 files or >800 lines
- OCR: status success; comments 0; files 2; tokens 199069; tool calls 19; warnings 0; duration 312s
- Largest changed files: Compiler/Proofs/HelperStepProofs.lean (+244/-0), PrintAxioms.lean (+10/-1)
Pilot mode: advisory only. Codex Review remains the merge gate.
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Summary
Expr.div, including builtin agreement and source helper evaluationExpr.divhelper payloadsPrintAxioms.leanwith the new div bridge declarations; total still reports 0 sorryValidation
lean-slot lake build Compiler.Proofs.HelperStepProofspython3 scripts/check_proof_length.pypython3 scripts/generate_print_axioms.pypython3 scripts/generate_print_axioms.py --checkgit diff --checkrg -n "\b(sorry|admit|axiom)\b|set_option\s+autoImplicit\s+true" Compiler/Proofs/HelperStepProofs.lean(no matches)Note
Low Risk
Proof-only additions mirroring existing arithmetic helper bridges; no runtime, auth, or compiler execution behavior changes.
Overview
Extends the compiler correctness proof library for
Expr.divusing the same helper-bridge pattern already used for add/mul/sub.Introduces
exprDivValuewith EVM-modulus bounds and agreement withFunctionBody.uint256_div_val_eq(including divide-by-zero). Adds lemmas tying compilation toYulExpr.call "div", source helper evaluation, and Yul builtindivto that value.Adds right- and left-threaded compositional context and post-state bridges (
exprInternalHelperCompositionalContextResult_div_*/PostStateResult_div_*), wired through the shared binary builtin helpers when no internal"div"override exists.PrintAxioms.leanis regenerated to list the nine new public theorems (total count 5702 → 5711); no newsorry/axiom.Reviewed by Cursor Bugbot for commit 9b09771. Bugbot is set up for automated code reviews on this repo. Configure here.