Status: New
Owner: ----
New issue 3392 by [email protected]: Miscompilation of numeric comparison
http://code.google.com/p/v8/issues/detail?id=3392
The following code defines a deterministic function "enb" which performs
some numeric comparisons to return a boolean result, calls said function
3000 times, and counts how many times true and false are returned.
I would expect "enb" to always return the same value (true), but in
practice it seems that the first approx 2000 iterations return true, and
then the remaining iterations instead return false.
--------------------------
function enb(){
var d,g;
d={c:-4611686018427387904};
for(g=0;g<1;){
g++;
d.c=360;
}
return 356<=d.c}
var ctr = {"false":0,"true":0};
for(var i = 0; i < 3000; ++i)
ctr[enb()]++;
print(ctr[false], ctr[true]);
--------------------------
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