Files
BFM-decomp/tools
Drew T d242877065 feat(phase-30 S50): func_8017C294 frame residual decoded to the instruction level (§172) — crack REFUTED across the reachable space, wall documented
- tools/cc1_dumps.sh: run the pinned cc1 with -dr/-ds/-dj/-dc/-dl/-dg and count standalone
  (use (reg)) insns in the .combine dump — each is one 8-byte never-referenced reload slot.
  The NEAR-2 residual = 12 such orphans vs the target's 16, now ENUMERATED pseudo-by-pseudo
  instead of inferred from ablations.
- The orphan mechanism, exact (combine.c:10835 + mips.md force_not_mem): every short-mem read
  is a movhi+shift-pair triple; the fold orphans its ashift temp iff the HI reg carries an
  extra HImode use and the death-note walk hits a label/jump. Single-use loads never orphan;
  the head can never orphan (walk reaches insn 0).
- The zero-code +4 factory is byte-refuted: 18 new probe families x 3 placements (s16
  respellings, cast truncations, <<16>>16 factories, placement sweeps, loop t/n, dossier-file
  re-sweep) all land at vars=224-same-bytes or drift. p_optr reproduces the target's exact
  16-orphan frame at +7 insns — opacity that defeats cse equally blinds num_sign_bit_copies;
  fold-const closes the tree level. Three canonicalizers, one wall.
- Dossier NOTES.md updated with the S50 ledger; backlog klass -> WALL(P32) for both names.
- NOT banked: no 0-closeness draft exists. The dial draft (NEAR 2) remains the floor.
2026-08-14 12:08:50 -06:00
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