Status: New
Owner: ----
CC: [email protected]
Labels: Type-Bug Priority-Medium
New issue 3164 by [email protected]: Crankshaft produces double
arithmetic due to -0 which can't actually be observed
http://code.google.com/p/v8/issues/detail?id=3164
This function is optimized with smi arithmetic:
function smi() {
var s = 1;
for (var i = 0; i < 1e6; i++)
s = 1 - s;
}
This one however is optimized with double arithmetic due to -0 poisoning
ICs. However -0 can never be observed outside so producing double
arithmetic seems wasteful:
function dbl() {
var s = 1;
for (var i = 0; i < 1e6; i++)
s = -s + 1;
}
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