[Issue 365] New: Regression: Bad code generation for floating point == and !=

[Don Clugston]

Thomas Kuehne wrote:
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> d-bugmail at puremagic.com schrieb am 2006-09-24:
>> http://d.puremagic.com/issues/show_bug.cgi?id=365
> 
>> NaNs are currently comparing equal to zero!
>>> , >=, !<>=, etc all seem to be OK.
>> -------
>> void main()
>> {
>>     real x = real.nan;
>>     assert( x!=0 );              // fails
>>     if (x==0) assert(0);         // fails
>> }
> 
> Added to DStress as
> http://dstress.kuehne.cn/compile/o/opEquals_06_A.d
> http://dstress.kuehne.cn/compile/o/opEquals_06_B.d
> http://dstress.kuehne.cn/compile/o/opEquals_06_C.d
> http://dstress.kuehne.cn/run/o/opEquals_06_D.d
> http://dstress.kuehne.cn/run/o/opEquals_06_E.d
> http://dstress.kuehne.cn/run/o/opEquals_06_F.d
> 
> Thomas
> 
> 
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> UVgj8nqZ50tE0Q3TBBJTn4Y=
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I just discovered that this is duplicate of BUG 291 (except that this 
bug report includes != ). However, I really think this is a critical 
error -- it's caused severe problems in some of my mathematical code, 
where I make significant use of NaNs.