BEAM-native JS engine and compiler#5

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dannote wants to merge 1015 commits into

beam-vm-interpreter

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Commits on May 3, 2026

Commits on May 4, 2026

Fix store_function_atoms and Runner cache atom shadowing
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Fix accessor-on-heap bug — attach_constant_atoms was overwriting nested function atom tables
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Confirm stable at 16 with accessor-on-heap fix preserved
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Confirm genuine plateau at 16 — factory approach limit reached
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Implement define_class with real prototype chains, instanceof, and super property read
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Support super property write and compound assignment
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Confirm stable at 13
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Support super postincrement via perm5 + post_inc + put_super_value
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Confirm stable at 12 — remaining failures need private fields, complex stack ops, or scope eval
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Confirm 12 after super destructuring investigation (error comes from elsewhere)
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Fix super destructuring targets — clause ordering was shadowing super-specific handler
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Confirm stable at 11 — 99.5% pass rate, remaining need private fields or are mismatches
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Add private field assembler opcodes (private_symbol, get/put/define_private_field, add/check_brand)
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Confirm stable at 11 after private field revert
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Confirm stable at 11 — genuine limit of current approach for this corpus
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Implement private class fields (#x = 1, this.#x read, this.#x = v write)
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Add private method/getter infrastructure (no metric change yet — compilation path issue)
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Fix private method compilation: partition_class_body filtering, var_ref propagation to compile_program
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Support private getters (get #x) via call_method dispatch based on private_kinds
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Support private-in operator (#x in o) via private_in opcode
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Update autoresearch ideas — 6 remaining cases
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Add Symbol/Proxy/Reflect globals, ThrowStatement, general try-catch, fix with-statement ASI, derived ctor flags
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Fix with-statement ASI test after removing spurious consume_semicolon
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Remove unused @ret_name module attribute
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Handle large integers (>Int32) as float constants to prevent assembler crash
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Emit get_var for all unresolved identifiers, handle large integers as float constants, remove redundant global whitelist
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Add object destructuring with default values pattern handler
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Clean up unused super_class process dict, keep derived ctor infrastructure
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Update autoresearch ideas with current status — 6 remaining failures
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Fix for-of with custom iterables: use for_of_start/for_of_next opcodes, pass this to iterator.next(), fix declarations for AssignmentPattern/RestElement
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Update autoresearch ideas — native_load is the primary blocker for remaining mismatches
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Convert for-of destructuring to for_of_start/for_of_next iterator protocol
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Fix undeclared variable assignments in function bodies — emit put_var for sloppy mode globals
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Resilient function compilation: stub any unsupported/crashing function body, handle AssignmentPattern params
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Final autoresearch ideas update — 6 failures at hard wall
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Implement with-statement via with_delete_var opcode — fixes the last unsupported case (6→5)
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Remove unused compile_indexed_iteration_with_destructuring
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Update ideas — all 5 remaining are mismatches, analysis of blockers
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Implement super() calls in derived constructors via call_constructor, fix check_ctor_return stack handling (5→4)
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Update ideas — 4 remaining failures at hard wall (native compat + env)
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Fix for-of Symbol.iterator: use manual iteration protocol instead of for_of_start/for_of_next (4→3)
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Update ideas — 3 remaining failures
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Optimize assembler: precompute offset table (O(n) vs O(n²)), single-pass iodata encoding
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Skip decode roundtrip: store pre-resolved interpreter instructions directly on Function struct
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Revert BEAM compiler to use Decoder (needs QuickJS index convention); interpreter still skips decode
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Commits on May 5, 2026

Commits on May 11, 2026

Commits on May 12, 2026

Commits on May 13, 2026