Nox/internal return type#59
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- Add `ArrayT(EvmBaseType, usize)` variant to EvmType in both Rust and egglog schemas. Storage arrays now display as `[u256; 10]` instead of `u256` in IR output. Updated pretty-printer, sexp serialization, type lowering, codegen type_slot_count, and cost table. - Add array bounds checking during lowering: constant out-of-bounds indices produce compile-time errors with source spans; non-constant indices emit runtime LT + REVERT guards for both memory-backed and storage-backed arrays. - Fix pre-existing bug in dead_code.egg IsPure rule for If nodes: the rule only checked 3 of 4 arguments (pred, inputs, then) but skipped the else branch. This caused If nodes with Revert in the else branch to be incorrectly marked pure and eliminated by DCE. - Add 18 EVM execution tests covering element access, mutation, loop iteration, slices, storage round-trips, OOB reverts, and boundary indices, all verified at O0/O1/O2. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
feat(ir): ArrayT type, array bounds checking, IsPure fix
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