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artdag: Phase 5 optimization — DCE + CSE + adjacent-op fusion + 18 tests
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optimize.sx adds three result-preserving passes: dce (keep outputs + ancestors,
preserve ids), cse (==build; structural sharing is free from content addressing),
and fuse (collapse 1-to-1 fusible unary chains into an artdag/pipeline node fed by
the chain head's input; leaves/fan-out/non-fusible ops never fuse). fusing-runner
replays pipeline stages, output-equivalent to the unfused dag. optimize 18/18,
total 87/87.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
giles
2026-06-07 12:08:12 +00:00
parent a2f4fb5e89
commit 228861215d
6 changed files with 391 additions and 9 deletions
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lib/artdag/scoreboard.md
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@@ -8,4 +8,5 @@ _Generated by `lib/artdag/conformance.sh`_
| analyze | 16 | 0 | 16 |
| plan | 18 | 0 | 18 |
| execute | 15 | 0 | 15 |
| **Total** | **69** | **0** | **69** |
| optimize | 18 | 0 | 18 |
| **Total** | **87** | **0** | **87** |