Reproduction link or steps

Reproduction Link - REPL link

Hi Team,
As you can see in the REPL link, import.meta.url, which is used in the createRequire function, is left in the output even though createRequire itself is not used and gets removed by Rolldown / Oxc.

This seems unexpected because the input file is empty, but the output still contains a standalone import.meta.url.

What is expected?

The expected output should be like the below one

import "node:module";
//#endregion
export {};

What is actually happening?

I think this is happening because, as mentioned in the Oxc docs, only the function call is treated as pure, not its arguments.

So in a helper like this:

export var __require = /* @__PURE__ */ createRequire(import.meta.url);

createRequire(...) can be removed, but the argument import.meta.url may still be preserved.

Using a pure IIFE seems to solve the issue, as mentioned in the Oxc docs:

export var __require = /* #__PURE__ */ (() => createRequire(import.meta.url))();

This way, the whole expression, including import.meta.url, can be removed when the helper is unused.

System Info

System:
    OS: Windows 11 10.0.26200
    CPU: (16) x64 13th Gen Intel(R) Core(TM) i5-13500H
    Memory: 1.54 GB / 15.75 GB
  Binaries:
    Node: 24.16.0 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.22 - C:\Users\96110\AppData\Roaming\npm\yarn.CMD
    npm: 11.13.0 - C:\Program Files\nodejs\npm.CMD
    pnpm: 11.4.0 - C:\Users\96110\AppData\Local\pnpm\bin\pnpm.CMD
  Browsers:
    Chrome: 149.0.7827.114
    Edge: Chromium (149.0.4022.69)
    Internet Explorer: 11.0.26100.8115
  npmPackages:
    rolldown: workspace:* => 1.1.1

Any additional comments?

No response