[llvm-commits] [llvm] r43289 - in /llvm/trunk: lib/Transforms/Scalar/InstructionCombining.cpp test/Transforms/InstCombine/and2.ll test/Transforms/InstCombine/or2.ll

[Dale Johannesen]

On Oct 24, 2007, at 9:06 AM, Chris Lattner wrote:

>
> On Oct 24, 2007, at 7:42 AM, Neil Booth wrote:
>
>> Chris Lattner wrote:-
>>
>>> Author: lattner
>>> Date: Wed Oct 24 00:38:08 2007
>>> New Revision: 43289
>>>
>>> URL: http://llvm.org/viewvc/llvm-project?rev=43289&view=rev
>>> Log:
>>> Implement a couple of foldings for ordered and unordered  
>>> comparisons,
>>> implementing cases related to PR1738.
>>
>> Is there a reason you're not using APFloat's comparison operation?
>
> Which one?  I just need to know if single apfloats are nan, I'm not
> comparing the constant values themselves.

getCategory()==fcNaN
I suppose we could add an isNan function, but this doesn't seem like  
a very common operation.