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https://github.com/vercel-labs/scriptc.git
synced 2026-10-25 06:24:27 +08:00
Malte Ubl
fa55ce6b07
Every SCR_ELEM_REF array stored its element type's retain, release and trace entry points in its own header (24 bytes), so ScrArr was 80 bytes: an 80-byte block for arrays of acyclic elements and a 96-byte block for cycle-capable ones. The three pointers now live in one constant ScrArrOps descriptor per element type, which the compiler emits once per module (@sc_arrops.*) and the runtime keeps static, and the header holds a pointer to it plus a 4-byte `cyc` flag beside `elem` that the inline RC fast paths test. ScrArr is 64 bytes: arrays take 64- and 80-byte blocks. scr_arr_new_ref(retain, release, trace, cap) becomes scr_arr_new_ops(ops, cap); scr_set_to_arr_ref takes the result's descriptor from its caller instead of building an array from the set's key adapters. The backend names the %ScrArr fields in SCR_ARR_FIELD. The layout change bumps the runtime ABI marker to scr_runtime_abi_v13.
31 lines
1.3 KiB
TypeScript
31 lines
1.3 KiB
TypeScript
import { expect, test } from "vitest";
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import { occurrences, withoutFirstLine, withoutRange } from "./large-artifacts.js";
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test("byte-level artifact edits match their string equivalents", () => {
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const text =
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"x declare void @scr_runtime_abi_v3()\ndeclare void @scr_runtime_abi_vX()\n" +
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"declare void @scr_runtime_abi_v13()\n call void @scr_runtime_abi_v13()\n" +
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"é\n call void @scr_runtime_abi_v13()\n";
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const bytes = Buffer.from(text);
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const declaration = /^declare void @scr_runtime_abi_v\d+\(\)\n/m;
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const call = /^ {2}call void @scr_runtime_abi_v\d+\(\)\n/m;
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const edited = withoutFirstLine(
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withoutFirstLine(
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bytes,
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"declare void @scr_runtime_abi_v",
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/^declare void @scr_runtime_abi_v\d+\(\)\n$/,
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),
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" call void @scr_runtime_abi_v",
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/^ {2}call void @scr_runtime_abi_v\d+\(\)\n$/,
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);
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expect(edited.toString()).toBe(text.replace(declaration, "").replace(call, ""));
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expect(withoutFirstLine(bytes, "missing", /^missing\n$/)).toBe(bytes);
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const line = " call void @scr_runtime_abi_v13()\n";
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const found = occurrences(bytes, line);
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expect(found).toHaveLength(text.split(line).length - 1);
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expect(withoutRange(bytes, found[0]!, Buffer.byteLength(line)).toString()).toBe(
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text.replace(line, ""),
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);
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});
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