[LLVMbugs] [Bug 3316] Constant folding for 'frem' is flaky

Dale Johannesen dalej at apple.com
Mon Jan 19 15:19:26 PST 2009

On Jan 19, 2009, at 3:09 PMPST, Neil Booth wrote:

> bugzilla-daemon at cs.uiuc.edu wrote:-
>> http://llvm.org/bugs/show_bug.cgi?id=3316
>> --- Comment #6 from Dale Johannesen <dalej at apple.com>  2009-01-19  
>> 15:20:58 ---
>> I see, currently the FP-to-integer conversions are always called with
>> TowardsZero, except this one place.  So the bug calling it with
>> NearestTiesToEven would never show up anywhere else.  This fixes  
>> both bugs.
>> Neil, please review.
>> http://llvm.org/viewvc/llvm-project?view=rev&revision=62528
> I'll take a look later; no time now.  But I left a comment in / above
> the frem implementation pointing out that it isn't close to being
> correct.  It will need a complete rewrite and will have to look like
> the other operations before it can be called correct.

Ah, that's what TRT means.
Could you be more specific about what doesn't work (when you have time)?

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