[builtins] Make Math.ceil, Math.trunc and Math.round optimizable.

test/mjsunit/es6/math-trunc.js

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-assertEquals("Infinity", String(1/Math.trunc(0)));
-assertEquals("-Infinity", String(1/Math.trunc(-0)));
-assertEquals("Infinity", String(1/Math.trunc(Math.PI/4)));
-assertEquals("-Infinity", String(1/Math.trunc(-Math.sqrt(2)/2)));
-assertEquals(100, Math.trunc(100));
-assertEquals(-199, Math.trunc(-199));
-assertEquals(100, Math.trunc(100.1));
-assertTrue(isNaN(Math.trunc("abc")));
-assertTrue(isNaN(Math.trunc({})));
-assertEquals(0, Math.trunc([]));
-assertEquals(1, Math.trunc([1]));
-assertEquals(-100, Math.trunc([-100.1]));
-assertTrue(isNaN(Math.trunc([1, 1])));
-assertEquals(-100, Math.trunc({ toString: function() { return "-100.3"; } }));
-assertEquals(10, Math.trunc({ toString: function() { return 10.1; } }));
-assertEquals(-1, Math.trunc({ valueOf: function() { return -1.1; } }));
-assertEquals("-Infinity",
-             String(1/Math.trunc({ valueOf: function() { return "-0.1"; } })));
-assertEquals("-Infinity", String(Math.trunc(-Infinity)));
-assertEquals("Infinity", String(Math.trunc(Infinity)));
-assertEquals("-Infinity", String(Math.trunc("-Infinity")));
-assertEquals("Infinity", String(Math.trunc("Infinity")));
+// Flags: --allow-natives-syntax
+
+var test_id = 0;
+
+function testTrunc(expected, input) {
+  var test = new Function('n',
+                          '"' + (test_id++) + '";return Math.trunc(n)');
+  assertEquals(expected, test(input));
+  assertEquals(expected, test(input));
+  assertEquals(expected, test(input));
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(expected, test(input));
+
+  var test_double_input = new Function(
+      'n',
+      '"' + (test_id++) + '";return Math.trunc(+n)');
+  assertEquals(expected, test_double_input(input));
+  assertEquals(expected, test_double_input(input));
+  assertEquals(expected, test_double_input(input));
+  %OptimizeFunctionOnNextCall(test_double_input);
+  assertEquals(expected, test_double_input(input));
+
+  var test_double_output = new Function(
+      'n',
+      '"' + (test_id++) + '";return Math.trunc(n) + -0.0');
+  assertEquals(expected, test_double_output(input));
+  assertEquals(expected, test_double_output(input));
+  assertEquals(expected, test_double_output(input));
+  %OptimizeFunctionOnNextCall(test_double_output);
+  assertEquals(expected, test_double_output(input));
+}
+
+function test() {
+  // Ensure that a negative zero coming from Math.trunc is properly handled
+  // by other operations.
+  function itrunc(x) {
+    return 1 / Math.trunc(x);
+  }
+  assertEquals(Infinity, itrunc(0));
+  assertEquals(-Infinity, itrunc(-0));
+  assertEquals(Infinity, itrunc(Math.PI / 4));
+  assertEquals(-Infinity, itrunc(-Math.sqrt(2) / 2));
+  assertEquals(-Infinity, itrunc({valueOf: function() { return "-0.1"; }}));
+  %OptimizeFunctionOnNextCall(itrunc);
+
+  testTrunc(100, 100);
+  testTrunc(-199, -199);
+  testTrunc(100, 100.1);
+  testTrunc(4503599627370495.0, 4503599627370495.0);
+  testTrunc(4503599627370496.0, 4503599627370496.0);
+  testTrunc(-4503599627370495.0, -4503599627370495.0);
+  testTrunc(-4503599627370496.0, -4503599627370496.0);
+  testTrunc(9007199254740991.0, 9007199254740991.0);
+  testTrunc(-9007199254740991.0, -9007199254740991.0);
+  testTrunc(0, []);
+  testTrunc(1, [1]);
+  testTrunc(-100, [-100.1]);
+  testTrunc(-100, {toString: function() { return "-100.3"; }});
+  testTrunc(10, {toString: function() { return 10.1; }});
+  testTrunc(-1, {valueOf: function() { return -1.1; }});
+  testTrunc(-Infinity, -Infinity);
+  testTrunc(Infinity, Infinity);
+  testTrunc(-Infinity, "-Infinity");
+  testTrunc(Infinity, "Infinity");
+
+  assertTrue(isNaN(Math.trunc("abc")));
+  assertTrue(isNaN(Math.trunc({})));
+  assertTrue(isNaN(Math.trunc([1, 1])));
+}
+
+// Test in a loop to cover the custom IC and GC-related issues.
+for (var i = 0; i < 10; i++) {
+  test();
+  new Array(i * 10000);
+}