KarpelesLab / goro / 26138114610

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vm: lower &\$expr (runRef) to dedicated OP_CREATE_REF + helper

Extracts EvalCreateRef(ctx, node) that calls into runRef.Run's body.
Adds OP_CREATE_REF (A=astIdx) and routes runRef nodes through it
instead of the generic OpClassConst delegation.

This is the first-stage lowering for B4 — the helper IS the AST
body, so semantics are unchanged. Future per-shape opcodes
(OP_REF_VAR, OP_REF_ARR, OP_REF_OBJ_PROP, OP_REF_STATIC_PROP) can
replace this when benchmarks demand it.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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