Matthew Stanley 5ded80e61e Merge master (AOT overlay generation) into perf/interpreter-hotpath ...

Integration branch: the interpreter-perf series (interpreter fallback +
additive shard autocompile + always-on production observability + the
fail-closed alias-body emitter fix) rebased-by-merge onto master's AOT
overlay generation (play-free extraction, bounded indirect discovery,
AOT recall, shadow-diff redesign).

Semantic-union highlights:
- gte.cpp: HEAD's direct-field marshaling fast paths kept; master's
  s_gte_replay_sandbox guards grafted onto every affected site.
- psx_icache.c: HEAD's global tag array + fetch_miss split kept;
  master's transactional shadow record/replay retargeted onto it.
- overlay_capture.c: HEAD's commit/retry/wait-pending pipeline kept;
  master's durable history + autocapture APIs wired into it
  (persist_history_snapshot fed from the immutable .d contribution).
- overlay_loader.c: master's interp-record/native-replay shadow-diff
  redesign kept as base with HEAD's scheduler-bail hardening grafted
  (new SHDIFF_SCHED divergence kind); strict manifest v2 parsing keeps
  master's P pair-id lines; always-on native-call ring preserved.
- main.cpp shutdown calls BOTH overlay_autocapture_shutdown() and
  overlay_capture_wait_pending() (the latter drains the preserve-write
  FIFO the former does not).
- recompiler: master's generate_alias_group refactor retains the
  fail-closed alias-body re-entry defaults from c85f1d1.

Validated on this tree: recompiler + runtime + tests build; all six
runtime unit tests PASS; interpreter perf guards PASS; recompiler
patch/structural tests PASS (l1 decoder oracle noise = 376 pre-existing
on both parents).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-07-20 00:43:41 -07:00

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