docs: Phase 117 DONE
Phase 117: if-only nested-if + call merge parity completed.
**Documentation**:
- docs/development/current/main/phases/phase-117/README.md (complete)
- docs/development/current/main/10-Now.md (updated with Phase 117 entry)
- docs/development/current/main/01-JoinIR-Selfhost-INDEX.md (added Phase 117 to index)
**Phase 117 Summary**:
- Verified nested if-only (inner if + outer else) with call merge
- Pattern: 3 call sites (f(1), f(2), f(3)) merge to single variable
- VM/LLVM EXE parity: both produce identical output "2\n3\n4"
- Regression: Phase 116 maintained
**Technical Details**:
- JoinIR Pattern3 (if-only) nested structure validation
- Call merge across nested control flow
- PHI node generation for nested branches
- LLVM EXE plugin integration (StringBox, IntegerBox, ConsoleBox)
**Next Steps**:
Phase 118+ will address more complex nested patterns (if-else nested, loop-if combinations).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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