Demonstrating cross chunk code motion

a.js

import {test} from './base.js';
import {inter} from './intermediate.js';

inter();
test('a');

b.js

import {test} from './base.js';
import {inter} from './intermediate.js';

inter();
test('b');

base.js

const local = 'test';

// I have to include some code to prevent cross method code motion.
export function crc32(str) {
  const crcTable = new Array(256);
  for (let i = 0; i < 256; i++) {
    let c = i;
    for (let j = 0; j < 8; j++) {
      if (c & 1) {
        c = (c >>> 1) ^ 0xEDB88320;
      } else {
        c = c >>> 1;
      }
    }
    crcTable[i] = c;
  }

  // Shrink to 32 bits.
  let crc = -1 >>> 0;
  for (let i = 0; i < str.length; i++) {
    const lookupIndex = (crc ^ str[i]) & 0xFF;
    crc = (crc >>> 8) ^ crcTable[lookupIndex];
  }
  return (crc ^ (-1)) >>> 0;
}

export function test(message) {
  document.getElementById(local).innerText = crc32(message);
  console.log(message);
}

BUILD.sh

OPTS=(
  "--language_in=ES6_STRICT"
  "--language_out=ES5"
  "--compilation_level=ADVANCED_OPTIMIZATIONS"
  "--formatting=pretty_print"

  "--js base.js"
  "--chunk base:auto"

  "--js intermediate.js"
  "--chunk intermediate:1:base"

  "--js a.js"
  "--chunk a:1:intermediate"

  "--js b.js"
  "--chunk b:1:intermediate"
)
set -ex
java -jar compiler.jar $(echo ${OPTS[*]})

intermediate.js

export function inter() {
  console.log('inter');
}