Scope enumerated before acting: cse_expr.md, loop.md, sched.md (full pass — T33 landed only a
partial), t7g-giant-harvest.md. 35 agents (9 derive + 26 adversarial refute), 2.48M subagent tokens.
308 findings: 174 CONFIRMED / 99 LINE-DRIFT / 26 REFUTED raised -> 20 UPHELD, 6 OVERTURNED / 9
unverifiable. cse_expr.md had the highest error density (17 refuted of 74); loop.md the lowest (3 of
96) thanks to its pre-existing caveat table.
12 FABRICATED (vs 0 last audit) — DIAGNOSED, not waved through: the agents pasted MAP text into the
source_quote field instead of compiler source. All 12 are CONFIRMED-status and none underpins an
upheld refutation, so nothing was deleted on bad evidence — but they are UNVERIFIED, they sit in
loop.md's biv-elimination area, and loop.md now records that as an open gap rather than a pass (R32).
Headline corrections:
- cse_expr: THE 1000-INSN CSE FLUSH DOES NOT EXIST IN 2.7.2 (added in 2.8.1; grep num_insns -> no
hits). It drove THREE places — §1's killer table, §6's giant tell, §7's "shift +-insns across the
1000 boundary" lever. A lever aimed at a counter our compiler lacks, in exactly the giants this map
serves. All struck.
- cse_expr: §2's "kill THE class reg" is singular and wrong. The audit BYTE-REPRODUCED T31's wall on
the pinned cc1: expand_block_move (mips.c:2350-2351) copy_addr_to_reg's BOTH aggregate addresses.
Two byte-proven remedies recorded, with the caveat that field-by-field copy is closed when the
target's own bytes need the block move (func_80132F40's case).
- cse_expr: assign_temp absent in 2.7.2 and no /s reset on slot reuse (recycled slots INHERIT /s);
no BUILT_IN_MEMSET; §6's "recompute after a join is never a residual" false at -O2.
- sched: S7's EPILOGUE half false (no live define_expand "epilogue" on MIPS) — re-scoped not deleted;
insn_cost is DEP-KIND-BLIND so restoring /s anti edges is not free.
- loop: "no memory load is EVER hoisted from a loop containing a call" FALSE — invariant_p checks
RTX_UNCHANGING_P first; byte-proven that a const int* load hoists to the preheader. Call args are
emitted LEFT-to-right, not right-to-left.
Remaining: matching-cookbook.md (~52 citations, MIXED provenance) — but a DIFFERENT risk profile,
since its idioms are byte-proven and citations are explanation, so a targeted citation sweep is
proportionate rather than a full audit. Not done; flagged.
Docs-only: no src/ or config/ touched, R22 not re-run and not claimed.
The last Fable5 pass of the sprint (Drew capped further waves at 86% context). func_80176734 (371 ins,
fresh un-drafted core): NO bank (mine=370 vs 371, 5 permuter-shaped clusters — entry-schedule tie,
caller-saved shuffles, a combine-merge missing insn, qty ties), pin-free, honestly handed off (P9;
match_one confirms the DIFF). Draft -> decomp-permuter warm-start (P29).
Idiom harvest (cookbook cse_expr §H):
- THE CSE ADDRESS-FOLD ANTIDOTE (zero asm): find_best_addr's cost-ungated qty-const fold + from_plus
re-association eat reg-based global accesses on every cse walk; a balanced if/else DIAMOND makes the
merge label barrier-preceded -> fresh cse table -> both folds die with no #APP. Replaced two asm dials.
- update_equiv_regs doubles live_length for single-set REG_EQUIV pseudos (local-alloc.c:1064) — a 2nd
set forfeits the doubling, ~4x the allocno priority; explains a "my dial broke the $s-order" class.
- record_jump_equiv fall-through delete (cse.c:7511) — a recognition tell for genuine dead source logic.
T1 sprint COMPLETE: 4 cracks + the SIGABRT characterization, 0 direct banks, but 3 wall reclassifications
+ 2 cracked roots + the pin-crash wall dissolved + ~9 new pin-free levers. Fable5 DISCOVERS, cheap-Opus
APPLIES — the ROI is idioms, not banks (docs/calibration.md).
Drew T