0367d96d9b
Phase 1.final of the flat-memory comptime VM — wire the host through it, reach corpus parity, and gate it behind a build flag — plus the first Phase 3 (compiler-API) step. Default OFF; legacy interpreter unchanged. Host wiring + hardening: - Machine accessors return error.OutOfBounds (no debug panic) on bad addresses; Frame.get/set bounds-check and bail (no panic) on a malformed operand ref (e.g. a ret Ref.none from an unresolved name). - tryEval routed at both comptime call sites in emit_llvm — the const-init fold and the #run side-effect path — with per-eval legacy fallback; yields .void_val for void/noreturn entries. Both sites sx_trace_clear() before the legacy fallback so a partial VM run that pushed trace frames doesn't double-push on re-run. VM coverage (all corpus const-inits except the inline-asm global): - Implicit context materialized from the __sx_default_context global; the full allocator protocol runs on the VM (context.allocator.alloc -> call_indirect -> CAllocator thunk -> libc_malloc -> native flat malloc). - Native libc memory builtins (malloc/calloc/free/memcpy/memmove/memset) on flat memory; f32 stored/loaded as the 4-byte single; signed sub-64-bit loads sign-extended; global_get (lazy + memoized); func_ref/call_indirect (func-ref encoded fid+1, 0 reserved for null); string/slice fat-pointer field access; is_comptime; the failable/error cluster (error_set tuples, trace_frame + native sx_trace_push/clear -> raise/catch/or + return traces). Build flag + Phase 3 seed: - -Dcomptime-flat (build_opts module) OR SX_COMPTIME_FLAT env enables the VM; zig build test -Dcomptime-flat runs the full corpus on the VM (688/0). - intern/text_of serviced natively on flat memory via Vm.callCompilerFn (compiler_welded boundary) — the seed the rest of the compiler-API grows on. Parity 688/688 gate ON and OFF. Unit tests added throughout. The lowering-time #insert wiring was explored and reverted (lowering-time IR can be malformed; full malformed-IR hardening is a prerequisite, deferred).
12 KiB
12 KiB