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Re: Floating point performance issue
David Brown <david.brown@hesbynett.no> writes:
>> David Brown<david@westcontrol.com> writes:
>>> Making "-Wfloat-equal" a default flag would eliminate many of these
>>> mistakes.
>>
>> It also results in false positives, so it shouldn't be on by default.
>>
>> [E.g. "float x = 0; .... y = x; ... if (y == 0) ..." should not result
>> in a warning.]
>>
>> -Miles
>>
>
> I gather (from the bug report mentioned by Vincent Lefevre) that code
> like this will not always give the result you expect - so the compiler
> should definitely warn in such cases.
No. The bug cited by Vincent is a completely different case.
Calculation and assignment are not the same.
-Miles
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