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https://github.com/Druthulu/BFM-decomp
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Drew T
f5f8dec5ee
- COLD-START RESULT (verified independently): 4763/4763 ins, 45 mismatched = 99.06% byte / 99.94% structural, exact frame, exact opcode histogram. NOT a match; nothing banked (45 != 0, the byte-gate is the sole arbiter). The residual is 3 register-grant ties, 0 structural divergence. Named next move: variable REUSE across c0..c3/a0v..a3v, the one §76 lever class the pass never reached. - MY BRIEF'S PREMISE WAS WRONG BY CONSTRUCTION -> §79. I chose this target partly because §71's callee-set fingerprint returned 0.00 against every matched giant = "a genuine cold start". But the function makes ZERO jal calls, so its callee fingerprint is EMPTY and §71 CANNOT FIRE: 0.00 meant "cannot answer", not "no relative". Grepping the target's DATA symbol D_800A5E60 found the matched func_8017BEBC at once -- func_8017BF14 is the 4-light-box member of the same renderer family whose 3-box sibling func_8017D960 was matched hours earlier. RULE: when §71 returns an empty/zero-overlap callee set, fall back to DATA-symbol fingerprinting; an empty fingerprint must never become a cold-start brief. - NEW LEVER (§79): THE FRAME LAYOUT IS A DECLARATION-ORDER ORACLE. gcc-2.7.2 assigns stack slots to spilled pseudos in pseudo-number order, and pseudo numbers follow first use ~ declaration order -- so the target's frame map reads back its source's declaration order. Moving ONE line took 73% -> 84% structural and brought all 127 slots into exact correspondence. - §76 CONFIRMED AT SCALE: the entire -62 length residual was ONE allocno-class decision (c0..c3 declared inside the cull blocks -> 1-death local allocnos -> global.c:668-671 removes those regs from the global pool -> r1lo spills), 52% -> 93%. An __asm__ ref-dial reached the same spill and scored WORSE -- declaration scope beat the ref dial again. - PIN NUANCE: pins are safe on a 0-jal function (§74's hazard cannot arise), 4 pins took 94% -> 99%; but §72 held -- pins 5 and 6 made it worse. - EFFORT ANSWER, HONEST: xHigh from a genuine cold start on a 4,763-ins giant bought the decode, the exact length, the exact frame and 99.06%, and did NOT close. Budget a SECOND pass at this size: the first buys structure, the last ~1% is register grants. - FULL R22 DISCHARGED: make clean + extract-all + check-all -> 140 passed, 0 failed of 140 (run after the agent finished, per the deferral recorded in the pool commit). tools-health OK.