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BFM-decomp/docs
Drew T 3bbfe21596 feat(phase-29): func_80165CA0 ×3 -> ×135 via ENGINE_SHB; +22 fns ×1; §75b (the carried-#define gap)
- dedup_extend banked 157 / 478 planned across 135 binaries: func_80165CA0 (99 ins) ×135
  (~+0.10pp) + 22 other functions ×1 picked up in the 3 overlays the first sweep excluded.
- FLEET: instr-weighted 80.1% -> 80.2% (10,525,534 -> 10,539,723, +14,189 ins); fn-count
  89.09% -> 89.14%; distinct-code 67.7% (unchanged — propagation moves coverage, not distinct-RE).
  dedup 1886 validated / 0 failed, C1 coverage 239,472/239,472. 0 NON_MATCHING (G4).
- R22 clean-fleet: make clean && extract-all && check-all -> 140 passed, 0 failed of 140.
- §75b — extraction lifts `extern`s but NOT file-scope `#define`s, so a body matched with a macro
  in its preamble compiles only where that overlay's define is in scope ABOVE the splice point.
  Signature is a LINK error (`undefined reference`), never `conflicting types`: an unexpanded
  SHB(x) parses as a call to an undeclared function. The diagnosis PREDICTED the membership —
  the 3 stuck members are exactly the 3 files carrying the __volatile__ spelling of SHB, i.e. the
  function's own preamble still sitting above its own instantiation.
- R14/R35 IN ACTION: the full-sweep census REVERSED the ranking I had just committed. I put the
  class-A normalization first at "~+0.13pp if it reaches ×138"; measured across all 134 it is
  worth 3 overlays (func_80012ABC 3, func_8012F14C 131). The cheap win was the one I ranked
  third. §75a's "collect across the whole sweep before scoping" earned itself immediately.
- NEXT (specified, not guessed): func_80174CB0 is class B on func_8012F14C (1944 `(s32)` vs 968
  `(s32,s32,s32)`). The macro carries the 3-param prototype; the failing TU declares the 1-param
  one FIRST (ov_SC01_001: TU@328 vs instantiation@2616) -> two prototypes, different arity ->
  reject. Per cdecl.compatible's MEASURED rule a K&R `extern void func_8012F14C();` is accepted
  BOTH ways round here (prototype-first + `()`-second always; `()`-first + prototype-second when
  no param default-promotes, and s32 does not) -> it should satisfy both populations in either
  order. One-line probe on the carried decl, byte-gate the 3 members, then extend.
2026-07-25 13:18:36 -06:00
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