mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-24 06:14:01 +08:00
Chris Tate
3f66c8e20b
- Remove C emission, debugging options, and automatic backend fallback. - Complete LLVM lowering and native bootstrap coverage across supported targets. - Link executables and libraries with precompiled C runtime packs, including iOS and Android.
49 lines
2.3 KiB
TypeScript
49 lines
2.3 KiB
TypeScript
import { mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
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import { tmpdir } from "node:os";
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import { join } from "node:path";
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import { expect, test } from "vitest";
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import { compile, deserializeModule } from "../src/index.js";
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import { emitLlvmModule } from "../src/backend/llvm/emitter.js";
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test("numeric Math operands borrow stable receivers but preserve snapshots across replacement and calls", async () => {
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const dir = await mkdtemp(join(tmpdir(), "scriptc-math-borrow-"));
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try {
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const entry = join(dir, "main.ts");
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const outPath = join(dir, "main.ir.json");
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await writeFile(entry, `
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function safe(bytes: Uint8Array, value: number): number {
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bytes[Math.floor(0)] = Math.min(255, Math.max(0, Math.floor(value)));
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return bytes[Math.ceil(0)];
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}
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function unsafe(value: number): number { return Math.floor(value); }
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function owned(bytes: Uint8Array, value: number): void { bytes[0] = Math.floor(unsafe(value)); }
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function replaced(bytes: Uint8Array, other: Uint8Array): void {
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bytes[0] = Math.floor((bytes = other) ? 7.9 : 0);
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}
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function readArray(values: number[]): number { return values[Math.floor(0)] * 2; }
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const buffer = new Uint8Array(1);
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console.log(safe(buffer, 17.9), readArray([4]));
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owned(buffer, 8.9);
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replaced(buffer, new Uint8Array(1));
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`);
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const result = await compile(entry, { outDir: dir, outPath, outputKind: "ir" });
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if (!result.ok) throw new Error(result.diagnostics.map((d) => `${d.code}: ${d.message}`).join("\n"));
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const mod = deserializeModule(await readFile(outPath, "utf8"));
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const ll = emitLlvmModule(mod);
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const llBody = (name: string): string => {
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const match = ll.match(new RegExp(`define internal [^\\n]+ @sc_f_${name}\\([^\\n]*\\) #0 \\{([\\s\\S]*?)\\n\\}`));
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expect(match, `${name} LLVM function`).not.toBeNull();
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return match![1]!;
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};
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expect(llBody("safe")).not.toContain("@scr_bytes_retain_v(");
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// The incoming parameter still owns the buffer until function cleanup.
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expect(llBody("safe").match(/call void @scr_bytes_release\(/g)).toHaveLength(1);
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expect(llBody("safe")).toContain("@llvm.floor.f64(");
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for (const name of ["owned", "replaced"]) {
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expect(llBody(name)).toContain("@scr_bytes_retain_v(");
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}
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expect(llBody("readArray")).not.toContain("@scr_arr_retain_v(");
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} finally { await rm(dir, { recursive: true, force: true }); }
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});
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