Complete iterative bytecode dispatch loop#1
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P15.34a — eliminate bcConstToValue re-interning (#1 perf hotspot, ~12.4%): - Add resolveProtoConstants: at first Proto execution, replace compile-time *LuaString (hash seed 0) with VM-interned pointers (per-VM seed) - bcConstToValue returns string constants directly — no re-hashing on every GETTABUP/GETFIELD/SETFIELD execution - Called from pushBytecodeExecFrame AND TAILCALL frame-reuse path - Ownership: after resolution, string constants owned by VM intern table, not by Proto (matching PUC's TString ownership model) - Results: global_arith -54%, field_access -59%, metamethod_add -13% P15.34b — PUC-faithful reader fixes (latent bug fixes): - Nil-fill missing parameters in pushBytecodeExecFrame (PUC luaD_precall) - Bound debug.getlocal/setlocal temp-scan by live_reg_top[pc] instead of scanning entire register window (fixes phantom temporaries from stale values) - Fix parked-coroutine GC scan: walk per-frame live_reg_top[fr.pc] instead of flat bytecode_stack[0..parked_top] scan (fixes SIGSEGV on coroutine.lua/cstack.lua) - cloneStrippedProto now copies live_reg_top - @Memset(regs, .Nil) kept as safety net: live_reg_top is per-statement high-water mark, not per-instruction after-boundary like PUC's L->top. Removal is a P15.35 prerequisite. Parity: 28/31 (no regressions), 44/44 smoke tests pass.
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TODO-1. This draft temporarily contains a source-export workflow so the branch can be built and tested locally; it will be removed before review.