v8/test/mjsunit/pixel-array-rounding.js

// Copyright 2012 the V8 project authors. All rights reserved.
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// Flags: --allow-natives-syntax

var pixels = new Uint8ClampedArray(11);

function f() {
  for (var i = 0; i < 8; i++) {
    pixels[i] = (i * 1.1);
  }
  pixels[8] = 255.5;
  pixels[9] = NaN;
  pixels[10] = -0.5;
  return pixels[1] + pixels[6];
}

f();
f();
assertEquals(6, pixels[5]);
%OptimizeFunctionOnNextCall(f);
f();
assertEquals(6, pixels[5]);
assertEquals(255, pixels[8]);
assertEquals(0, pixels[9]);
assertEquals(0, pixels[10]);