§405 — the generalisable residue of three waves, grouped by lever family:
A. match_one compares .text ONLY, so a switch's jump table is invisible to it —
a draft can score 110/110 with a PERMUTED table emitted as identity
(resident/func_800D02D0, byte-witnessed). Some historical 'MATCH but gate
rejected' verdicts were the ORACLE being wrong (R34 in our most-trusted tool).
B. the scheduler dials, incl. the birthing-boost re-tie's PLACEMENT rule (must be
a LATER basic block) and reorg's stop_search_p halting at any asm.
C. regalloc from C without pins: variable identity picks global- vs local-alloc;
a cross-arm join value loses first-fit and should be duplicated per arm for
cross_jump to refund; pass-through params reserve arg regs at zero cost.
D. integration is still the bottleneck — ~1/3 had byte-correct bodies blocked
only by declarations; the TU is the authority.
E. what the agents REFUTED: §137 invariance is false for CONFLICT-driven ties;
§153's 'cse2 puts it back' fails for the dead-def case; §257-8 volatility
polarity is per-site, not portable.
§406 — the prologue-weave class: 134 of 1,237 open stubs (11%) share the
sw / move , / sw shape, cause traced in cc1's .i.sched2 dump
(memrefs_conflict_p finds no dependence, potential_hazard picks sw $ra early), 12
variants measured inert, and ONE working lever (non-volatile memory-clobber asm
after the param copy). One lever x 134 known targets = a sweep, not an idiom.
Drew T
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