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https://github.com/Druthulu/BFM-decomp
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Drew T
79c327b2a2
26 agents (5 derive + 21 adversarial refute), 1.73M subagent tokens. Two guards, because a false REFUTED deletes a working lever and is worse than a stale line number: - MECHANICAL FABRICATION CHECK (.run/verify_regalloc_findings.py, NEW): every claim had to carry a verbatim source_quote + file + line; I re-opened each file at each line and compared. 184 checked, **0 FABRICATED** (27 exact, 153 NEAR = quote real but line arithmetic off by +2..+19, 4 declared unverifiable). Distinguishes NEAR from FABRICATED because the 2.8.1->2.7.2 drift (+300..+600 in reload1.c) can land a lookup inside a DIFFERENT function and still read plausibly. - ADVERSARIAL SECOND STAGE: every REFUTED claim went to an independent agent told to refute the refutation, defaulting to upholding the map. **Of 21 REFUTED, 14 OVERTURNED, 7 stand.** The raw audit output would have deleted 14 CORRECT levers (RC-6's verdict, the decoy-qty lever, the <=3-qty creation-order rule, the keepalive-read lever). FINAL: 119 CONFIRMED / 40 LINE-DRIFT / 7 REFUTED-upheld / 4 UNVERIFIABLE. The model is sound. The 7, marked [A23] inline: 1. K4 flag_caller_saves is ON (toplev.c:3387-3394 at -O2), BYTE-PROVEN on the real cc1 — a call-crossing value is not confined to $s0-$s7-or-spill. Added the missing diagnostic: caller-save slots are 4-BYTE-PACKED vs reload spill slots 8-ROUNDED (misreading one as the other sends you to RC-1 + decl reordering, the wrong lever entirely). 2. RC-7's premise false: a frame address is never CONSTANT_P (rtl.h:237-240 excludes PLUS), so it gets a real slot + lw. THIS EXPLAINS T31's byte-tested failure today — cse_expr.md §2's remat recipe could not dissolve func_80132F40's hoist (47->40, never 0) because the promised mechanism does not apply to frame addresses. Independent audit and live byte-test converged. 3. The "init MOVED to just before its use" pass is 2.8.1-only; 2.7.2 deletes the init instead. 4. K2 refs are LOOP-DEPTH-WEIGHTED (reg_n_refs += loop_depth), not per-insn-mention. 5. K1 qty numbers come from BIRTH order, not regno order. 6. RC-15/K2: allocno_live_length is the DENOMINATOR — priority is a density. 7. Pins do NOT kill the S2 boost — independently reproducing yesterday's sched.md finding from a different agent/section, plus the decisive detail that sched.c:423 DOES add the pseudo guard where it wants one, so the omission at :2478 is deliberate. NOT applied: the 40 LINE-DRIFT fixes wholesale — generic quotes match several places, so publishing all 40 risks replacing 2.8.1 drift with fresh 2.7.2 drift. Header carries 12 hand-verified anchors + an instruction to grep before citing. Struck text preserved, not deleted (H5). Docs-only: no src/ or config/ touched, R22 not re-run and not claimed.