[llvm-commits] [llvm] r55781 - /llvm/trunk/lib/Transforms/Scalar/SimplifyLibCalls.cpp

[Dale Johannesen]

On Sep 22, 2008, at 11:55 AMPDT, Duncan Sands wrote:

>> Actually neither readnone nor readonly does a good job of capturing
>> the semantics of (say) log; we want something in between that means
>> "reads rounding mode but not memory".  As discussed elsewhere.
>
> And as Chris pointed out somewhere, it's rather pointless to
> try to get correct rounding mode behaviour for calls to functions
> like sin & log, when simpler operations like multiplication and
> division currently don't pay any attention to the rounding mode.
> So I'm sorry I was so annoying about the rounding mode before :)

It's OK.  If we accept that the rounding mode handling should be  
conservatively correct (which I'm not so sure about), we have to start  
somewhere.  Might as well be here.