Inline Math.fround in optimized code.

test/mjsunit/constant-folding-2.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 163 matching lines @@
   assertEquals(2, Math.round(1.5));
   assertEquals(-1, Math.round(-1.5));
   assertEquals("Infinity", String(Math.round(Infinity)));
   assertEquals("-Infinity", String(Math.round(-Infinity)));
   assertEquals("Infinity", String(1 / Math.round(0.0)));
   assertEquals("-Infinity", String(1 / Math.round(-0.0)));
   assertEquals("NaN", String(Math.round(NaN)));
   assertEquals(Math.pow(2, 52) + 1, Math.round(Math.pow(2, 52) + 1));
 });
 
+test(function mathFround() {
+  assertTrue(isNaN(Math.fround(NaN)));
+  assertEquals("Infinity", String(1/Math.fround(0)));
+  assertEquals("-Infinity", String(1/Math.fround(-0)));
+  assertEquals("Infinity", String(Math.fround(Infinity)));
+  assertEquals("-Infinity", String(Math.fround(-Infinity)));
+  assertEquals("Infinity", String(Math.fround(1E200)));
+  assertEquals("-Infinity", String(Math.fround(-1E200)));
+  assertEquals(3.1415927410125732, Math.fround(Math.PI));
+});
+
 test(function mathFloor() {
   assertEquals(1, Math.floor(1.5));
   assertEquals(-2, Math.floor(-1.5));
   assertEquals("Infinity", String(Math.floor(Infinity)));
   assertEquals("-Infinity", String(Math.floor(-Infinity)));
   assertEquals("Infinity", String(1 / Math.floor(0.0)));
   assertEquals("-Infinity", String(1 / Math.floor(-0.0)));
   assertEquals("NaN", String(Math.floor(NaN)));
   assertEquals(Math.pow(2, 52) + 1, Math.floor(Math.pow(2, 52) + 1));
 });
@@ skipping 40 matching lines @@
 });
 
 
 test(function int32Mod() {
   assertEquals(-0, -2147483648 % (-1));
 });
 
 test(function int32Div() {
   assertEquals(2147483648, -2147483648 / (-1));
 });