hakorune/docs/private/roadmap/selfhosting/mir-generation-p1.md

MIR Generation — Phase 15.7 (P1)

Scope

• Migrate minimal MIR(JSON v0) generation to Nyash boxes under selfhost/compiler/pipeline_v2/ using shared helpers in selfhost/shared/common/mir/.
• Keep Rust side as a JSON receiver; semantics unchanged.

Boxes

• Shared (common):
  • MirSchemaBox: instruction/blocks/module constructors (pure, minimal)
  • BlockBuilderBox: small CFG assemblers (const→ret, compare→branch→ret)
• Pipeline (compiler):
  • EmitMirFlow/EmitMirFlowMap: existing path (compatible)
  • Next: adapt to use MirSchemaBox/BlockBuilderBox gradually (no behavior change)

Acceptance

• quick: selfhost_emit_mir_min_rc_vm (rc-only) passes
• integration-core: parity set remains green (no behavior change)

Next Steps (P2+)

• Binop/unary via MirSchemaBox extensions
• Call/Method/Extern via SSOT slots and extern registry
• NewBox minimal (Array/String/Map)