tomoaki
84cd653aef
Extracts merge copy emission pattern from joinir_block_converter.rs to eliminate 4x code duplication: - MergeBranch enum (Then/Else) for branch selection - emit_merge_copies() for MergePair-based copy emission - emit_copy_instructions() for direct ValueId pair emission - Comprehensive unit tests for all patterns Pattern reduction: ~20 lines duplicated 4x → single 60-line module 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
JoinIR → VM bridge layer
Responsibilities:
- Convert normalized JoinIR modules into MIR for the Rust VM without changing semantics.
- Provide a thin runner helper that executes a JoinIR entry via the VM.
- Host experimental metadata-aware paths (Phase 40-1) behind clearly marked helpers.
Boundaries:
- No new control-flow semantics or heuristics here; this layer only maps structures already normalized by JoinIR.
- Keep type information minimal (MirType::Unknown) and avoid adding inference or guessing.
- Debug/diagnostic output must stay behind
NYASH_JOINIR_VM_BRIDGE_DEBUG=1.
File layout:
mod.rs: public surface + shared helpers (naming, error, logging)convert.rs: JoinIR→MIR lowering (functions/blocks/instructions)runner.rs: VM execution entry (run_joinir_via_vm)meta.rs: experimental metadata-aware conversion hookstests.rs: bridge-specific unit tests (kept local to avoid cross-layer leakage)