v8/test/mjsunit/compiler/literals-optimized.js

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// Flags: --allow-natives-syntax

// Test optimized versions of array and object literals.

function TestOptimizedLiteral(create, verify) {
  %PrepareFunctionForOptimization(create);
  verify(create(1, 2, 3), 1, 2, 3);
  verify(create(3, 5, 7), 3, 5, 7);
  %OptimizeFunctionOnNextCall(create);
  verify(create(11, 23, 42), 11, 23, 42);
}


// Test shallow array literal.
function create_arr_shallow(a, b, c) {
  return [0, a, 0, b, 0, c];
}
function verify_arr_shallow(array, a, b, c) {
  assertSame(6, array.length);
  assertSame(0, array[0]);
  assertSame(a, array[1]);
  assertSame(0, array[2]);
  assertSame(b, array[3]);
  assertSame(0, array[4]);
  assertSame(c, array[5]);
}
TestOptimizedLiteral(create_arr_shallow, verify_arr_shallow);


// Test nested array literal.
function create_arr_nested(a, b, c) {
  return [[0, a], [b, c], [1, 2], 3];
}
function verify_arr_nested(array, a, b, c) {
  assertSame(4, array.length);
  assertSame(2, array[0].length);
  assertSame(0, array[0][0]);
  assertSame(a, array[0][1]);
  assertSame(2, array[1].length);
  assertSame(b, array[1][0]);
  assertSame(c, array[1][1]);
  assertSame(2, array[2].length);
  assertSame(1, array[2][0]);
  assertSame(2, array[2][1]);
  assertSame(3, array[3]);
}
TestOptimizedLiteral(create_arr_nested, verify_arr_nested);


// Test shallow object literal.
function create_obj_shallow(a, b, c) {
  return { x:a, y:b, z:c, v:'foo', 9:'bar' };
}
function verify_obj_shallow(object, a, b, c) {
  assertSame(a, object.x);
  assertSame(b, object.y);
  assertSame(c, object.z);
  assertSame('foo', object.v);
  assertSame('bar', object[9]);
}
TestOptimizedLiteral(create_obj_shallow, verify_obj_shallow);


// Test nested object literal.
function create_obj_nested(a, b, c) {
  return { x:{ v:a, w:b }, y:{ v:1, w:2 }, z:c, v:'foo', 9:'bar' };
}
function verify_obj_nested(object, a, b, c) {
  assertSame(a, object.x.v);
  assertSame(b, object.x.w);
  assertSame(1, object.y.v);
  assertSame(2, object.y.w);
  assertSame(c, object.z);
  assertSame('foo', object.v);
  assertSame('bar', object[9]);
}
TestOptimizedLiteral(create_obj_nested, verify_obj_nested);


// Test mixed array and object literal.
function create_mixed_nested(a, b, c) {
  return { x:[1, 2], y:[a, b], z:c, v:{ v:'foo' }, 9:'bar' };
}
function verify_mixed_nested(object, a, b, c) {
  assertSame(2, object.x.length);
  assertSame(1, object.x[0]);
  assertSame(2, object.x[1]);
  assertSame(2, object.y.length);
  assertSame(a, object.y[0]);
  assertSame(b, object.y[1]);
  assertSame(c, object.z);
  assertSame('foo', object.v.v);
  assertSame('bar', object[9]);
}
TestOptimizedLiteral(create_mixed_nested, verify_mixed_nested);