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Drew T ce79a3e432 docs(cookbook): §449 — four compiler dials from the S75 redraft wave, two byte-gate confirmed

Provenance stated per row (CONFIRMED = banked through the whole-binary gate;
CLAIMED = the agent's own measurement on a function that did not bank), because
one of these came from a function that was adversarially upheld and then FAILED
the real gate.

A. reg_n_sets is a one-line scheduling dial (CONFIRMED, func_80180ABC 257 ins).
   sched1 schedules backward; a pseudo set exactly once gets the birthing_insn_p
   launch boost (priority = 7f000001 in cc1 -dS), which drags its load LATE.
   Splitting the RMW as 't = t + 1; *p = t;' makes reg_n_sets 2, suppresses the
   boost, and floats the load to the block head -- the block-local dual of §350's
   shared temp, WITHOUT the global-allocno penalty that costs the in-place addiu.
   Companions: 180 legal statement permutations all scored identically while one
   cc1 -dS dump named the cause (diagnose, don't permute); a pin-free fix for
   paired-register inversion; and gcc frame slot order is NOT declaration order
   (BLKmode aggregates go in order at expand_decl, an addressable scalar is
   forced to the stack later -- declare 's32 x[2]' to place a slot between two
   aggregates).

B. A single-set local's VALUE is visible at a switch join and erases a
   zero-extension (CONFIRMED, func_801806F8 241 ins). combine.c:10035 lets
   get_last_value bypass the label_tick guard when reg_n_sets == 1, so all seven
   narrowing spellings emit nothing. Diagnostic: a visible extension in the
   target means the variable has MORE THAN ONE SET in the original source.
   Verified against a matched sibling: andi is the multi-set zero-extend and
   sll;srl is NEVER reachable from a single expression.

C. CORRECTION to §439 -- the sll 16; srl 16 pair lands AFTER the jal, not before
   it (sched1 sinks the ashift past the call), and it works even for a KNOWN
   CONSTANT, because the call-split defeats folding structurally rather than by
   hiding the value.

D. An offline jtbl-rodata placement audit (CLAIMED, func_800CB00C -- did not
   bank, which is the point: both matchers compare .text only, so a jtbl
   function's MATCH says nothing about its table).

2026-09-03 00:30:55 -06:00

4.4 KiB

Raw Blame History

Backlog — automation near-misses for hand-finishing

Generated by tools/backlog.py render from .run/backlog.jsonl. These are functions the Phase-21 automation got close on but did NOT byte-match. The whole-binary byte-gate is the sole arbiter (G3/P9): byte-matches bank and are NOT listed here — only genuine near-misses/blockers are. Ranked by hand-session priority: reach (×N propagation leverage) → closeness (match_one mismatch count, lower = closer) → size. Each row's best_draft is the closest C the machine reached — resume from there.

Open near-misses: 20 · by status {'near': 11, 'failed': 9} · by class {None: 20}

#	addr	reach	nins	status	closeness	where it stuck	best draft
1	func_80181804	None	None	near	0	match_one MATCH but the whole-binary gate rejected — CAUSE NOT DETERMINED. FIRST re-derive the destination TU from the asm subdir: asm//nonmatchings/<TU_stem>/.s => src//<TU_stem>.c (the third path component IS the TU). Only then look for a decl conflict or a codegen residual.	`.run/backlog_drafts/func_80181804.c`
2	func_80181CB8	None	None	near	0	match_one MATCH but the whole-binary gate rejected — CAUSE NOT DETERMINED. FIRST re-derive the destination TU from the asm subdir: asm//nonmatchings/<TU_stem>/.s => src//<TU_stem>.c (the third path component IS the TU). Only then look for a decl conflict or a codegen residual.	`.run/backlog_drafts/func_80181CB8.c`
3	func_8002B0B4	None	None	near	0	match_one MATCH but the whole-binary gate rejected — CAUSE NOT DETERMINED. FIRST re-derive the destination TU from the asm subdir: asm//nonmatchings/<TU_stem>/.s => src//<TU_stem>.c (the third path component IS the TU). Only then look for a decl conflict or a codegen residual.	`.run/backlog_drafts/func_8002B0B4.c`
4	func_8017D918	None	None	near	4	residual: 4 mismatch	`.run/backlog_drafts/func_8017D918.c`
5	func_80182CBC	None	28	near	7	resolver DIFF (real-TU rtu_match, 20260825-233820): mine=28 target=28	`.run/backlog_drafts/func_80182CBC.c`
6	func_80180EC0	None	None	near	9	residual: 9 mismatch	`.run/backlog_drafts/func_80180EC0.c`
7	func_80181294	None	None	near	19	residual: 19 mismatch	`.run/backlog_drafts/func_80181294.c`
8	func_80181344	None	None	near	48	residual: 48 mismatch	`.run/backlog_drafts/func_80181344.c`
9	func_80180B3C	None	297	near	125	resolver DIFF (real-TU rtu_match, 20260825-233820): mine=296 target=297	`.run/wave_eo/shard478/func_80180B3C.c`
10	func_800CB00C	None	123	near	168	resolver DIFF (real-TU rtu_match, 20260826-053145): mine=174 target=123	`.run/wave_g0c/shard30/func_800CB00C.c`
11	func_80180B3C	None	21	near	287	resolver DIFF (real-TU rtu_match, 20260826-022235): mine=287 target=21	`.run/wave_eq/shard63/func_80180B3C.c`
12	func_800D06E8	None	None	failed		resolver CC1 (real-TU rtu_match, 20260825-233820): .run/resolver/work/resident__func_800D06E8/c0/rtu/func_800D06E8/t.c:1770: conflicting types for `Struct80078E78'	`.run/wave_ch/shard62/func_800D06E8.c`
13	func_8017FBCC	None	None	failed		won't compile standalone (loose-typing / missing decl)	`.run/backlog_drafts/func_8017FBCC.c`
14	func_801832F8	None	None	failed		won't compile standalone (loose-typing / missing decl)	`.run/backlog_drafts/func_801832F8.c`
15	func_8017F018	None	None	failed		won't compile standalone (loose-typing / missing decl)	`.run/backlog_drafts/func_8017F018.c`
16	func_8018095C	None	None	failed		won't compile standalone (loose-typing / missing decl)	`.run/backlog_drafts/func_8018095C.c`
17	func_80181720	None	None	failed		won't compile standalone (loose-typing / missing decl)	`.run/backlog_drafts/func_80181720.c`
18	func_8018DFC4	None	None	failed		won't compile standalone (loose-typing / missing decl)	`.run/backlog_drafts/func_8018DFC4.c`
19	func_80062144	None	None	failed		won't compile standalone (loose-typing / missing decl)
20	func_80180B3C	None	None	failed		won't compile standalone (loose-typing / missing decl)	`.run/backlog_drafts/func_80180B3C.c`

4.4 KiB Raw Blame History Unescape Escape

Backlog — automation near-misses for hand-finishing

4.4 KiB

Raw Blame History