hakorune

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tomoaki e4b5a8e832 feat(plan): Phase 273 P2 Step 3-6 - Pattern7 (SplitScan) to Plan line

Migrate Pattern7 from legacy lowering to Plan architecture:

DomainPlan (mod.rs):
- Added SplitScan(SplitScanPlan) variant
- SplitScanPlan: s_var, sep_var, result_var, i_var, start_var

Extractor (pattern7_split_scan.rs):
- extract_split_scan_plan() returning DomainPlan
- Reuses existing extract_split_scan_parts()

Router (router.rs):
- Pattern7 now uses Plan line (Normalize→Verify→Lower)
- Removed from LOOP_PATTERNS table

Normalizer (normalizer.rs):
- normalize_split_scan() - 400+ lines migrated from impl
- 6 blocks: preheader/header/body/then/else/step/after
- 4 PHIs: header(2) + step(2) for i/start carriers
- Side effect: push with EffectMask::MUT

Bug fixes:
- Pattern6 extractor returns Ok(None) for non-match (allows fallback)
- Reverse scan filtered early in extractor (P1 scope)

Tests:
- phase256_p0_split_vm: PASS (exit=3)
- phase258_p0_index_of_string_vm: PASS (exit=6)

Lowerer no longer contains "split" - pattern-agnostic achieved!

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2025-12-22 23:35:43 +09:00

api

refactor(mir): phase260 p0 edge-args plumbing (strangler) + ssot api + docs

2025-12-21 04:34:22 +09:00

legacy

feat(joinir): Phase 256 P1.5 - JoinInst::Select 命令サポート（根治）

2025-12-20 03:11:58 +09:00

merge

refactor(mir): phase260 p0.2 hide legacy edge-args reads behind BasicBlock API

2025-12-21 09:01:35 +09:00

patterns

feat(plan): Phase 273 P2 Step 3-6 - Pattern7 (SplitScan) to Plan line