[LLVMdev] Making MipsOptimizeMathLibCalls generic

[Akira Hatanaka]

Assuming it is okay to make this pass generic, I would consider running it
as the last IR pass (at the end of TargetPassConfig::addIRPasses).


On Fri, Aug 16, 2013 at 5:13 AM, Richard Sandiford <
rsandifo at linux.vnet.ibm.com> wrote:

> Ping.
>
> Richard Sandiford <rsandifo at linux.vnet.ibm.com> writes:
> > MipsOptimizeMathLibCalls.cpp converts:
> >
> >   g = sqrt (f);
> >
> > into:
> >
> >   r1 = sqrt (f) readonly;
> >   if (g is a NaN)
> >     r2 = sqrt (f);
> >   g = phi (r1, r2)
> >
> > I'd like to do the same on z.  Would it be OK to make this pass generic
> > and do the transformation whenever FSQRT isLegalOrCustom for the type?
> >
> > If so, should it stay a separate pass, or should I merge it with
> > something else?
> >
> > Thanks,
> > Richard
> >
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