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      1 // Copyright 2013 the V8 project authors. All rights reserved.
      2 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions
      6 // are met:
      7 // 1.  Redistributions of source code must retain the above copyright
      8 //     notice, this list of conditions and the following disclaimer.
      9 // 2.  Redistributions in binary form must reproduce the above copyright
     10 //     notice, this list of conditions and the following disclaimer in the
     11 //     documentation and/or other materials provided with the distribution.
     12 //
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     22 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23 
     24 description(
     25 "This test checks that n % 0 doesn't crash with a floating-point exception."
     26 );
     27 
     28 shouldBe("2 % 0", "NaN");
     29 
     30 var n = 2;
     31 shouldBe("n % 0", "NaN");
     32 
     33 function f()
     34 {
     35     return 2 % 0;
     36 }
     37 
     38 shouldBe("f()", "NaN");
     39 
     40 function g()
     41 {
     42     var n = 2;
     43     return n % 0;
     44 }
     45 
     46 shouldBe("g()", "NaN");
     47 
     48 // Test that reusing a floating point value after use in a modulus works correctly.
     49 function nonSpeculativeModReuseInner(argument, o1, o2)
     50 {
     51          // The + operator on objects is a reliable way to avoid the speculative JIT path for now at least.
     52     o1 + o2;
     53 
     54     var knownDouble = argument - 0;
     55     return knownDouble % 1 + knownDouble;
     56 }
     57 function nonSpeculativeModReuse(argument)
     58 {
     59     return nonSpeculativeModReuseInner(argument, {}, {});
     60 }
     61 
     62 shouldBe("nonSpeculativeModReuse(0.5)", "1");
     63