+2 bodies (worker C claims 19-20) and 3 gp symbol rows (D_80121F90,
D_8012196E, D_80121964). Candidate gate MATCH before promotion.
NEW EXCLUSION CLASS `restores_unsaved` (worker A, coordinator-verified). A body
that restores a callee-saved register it never saves cannot be a whole function:
the register it restores was established by an enclosing prologue that the derived
extent cut off. These are jal targets INSIDE a real function, so the walk began
mid-body — distinct from bad_extent_start, which flags starts that are not
function entries at all.
Verified disjoint from the matched corpus before acting, as the project requires:
0 of 462 registered regions trip the rule; 11 worklist rows do.
excluded_restores_unsaved=11; worklist 1265 -> 1253 rows. 5 new tests; suite
229 -> 237, OK. make check green: regions=462 AGREE, differing_bytes=0 MATCH.
Independent corroboration worth recording: the new rule re-derives 0x8010080C,
the false extent start worker C reported earlier via a completely different signal
(the first instruction reads a register the range never defines). Two independent
detections of one defect class. bad_extent_start is False for that row, confirming
C's observation that the older rule missed it. Its Makefile --exclude entry is
retained only as the provenance record for that defect.
Christopher Williams
091a9020f7