Revert of Collect type feedback on result of Math.[round|ceil|floor]

test/mjsunit/math-round-minus-zero.js

-// Copyright 2015 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
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
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-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --allow-natives-syntax --noalways-opt
-
-// Test that a -0 result doesn't cause deopt loops
-function noDeoptLoop(x) {
-  return Math.round(x);
-}
-assertEquals(0, noDeoptLoop(0.4));
-assertEquals(0, noDeoptLoop(0.4));
-assertEquals(0, noDeoptLoop(0.4));
-%OptimizeFunctionOnNextCall(noDeoptLoop);
-assertEquals(0, noDeoptLoop(0.4));
-assertEquals(0, noDeoptLoop(0.4));
-assertEquals(-Infinity, 1/noDeoptLoop(-0.4));
-assertUnoptimized(noDeoptLoop);
-assertEquals(-Infinity, 1/noDeoptLoop(-0.4));
-assertEquals(-Infinity, 1/noDeoptLoop(-0.0));
-assertEquals(-Infinity, 1/noDeoptLoop(-0.5));
-assertEquals(-1, noDeoptLoop(-1));
-assertEquals(-1, noDeoptLoop(-0.51));
-%OptimizeFunctionOnNextCall(noDeoptLoop);
-assertEquals(-Infinity, 1/noDeoptLoop(-0.4));
-assertEquals(-Infinity, 1/noDeoptLoop(-0.4));
-assertOptimized(noDeoptLoop);
-%ClearFunctionTypeFeedback(noDeoptLoop);
-%DeoptimizeFunction(noDeoptLoop);
-
-// Test that round that goes megamorphic is handled correctly.
-function notRound(x) {
-  return -x;
-}
-function testMega(f, x) {
-  return f(x);
-}
-assertEquals(7, testMega(Math.round, 7.4));
-assertEquals(7, testMega(Math.round, 7.4));
-assertEquals(7, testMega(Math.round, 7.4));
-assertEquals(-7.4, testMega(notRound, 7.4));
-
-// Make sure that we can learn about round specialization from Cranskhaft, which
-// doesn't insert soft deopts for CallICs.
-function crankRoundLearn(x) {
-  return Math.round(x);
-}
-%OptimizeFunctionOnNextCall(crankRoundLearn);
-assertEquals(12, crankRoundLearn(12.3));
-assertOptimized(crankRoundLearn);
-assertEquals(-Infinity, 1/crankRoundLearn(-0.4));
-assertOptimized(crankRoundLearn);
-assertEquals(-Infinity, 1/crankRoundLearn(-0.4));