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Re: if-conv problem....
- From: "Deepak B. Nayak" <deepakbn at csa dot iisc dot ernet dot in>
- To: Richard Henderson <rth at redhat dot com>
- Cc: Jim Wilson <wilson at redhat dot com>, gcc at gcc dot gnu dot org
- Date: Thu, 3 Oct 2002 12:04:56 +0530 (IST)
- Subject: Re: if-conv problem....
> On Thu, Oct 03, 2002 at 10:18:44AM +0530, Deepak B. Nayak wrote:
> > we wanted if-conv to be done before instr-combine pass so we need first
> > if-conv pass to work..but what is diff..???
> > why first pass did not work and second one did..???
>
> You need to spend some time actually reading the code.
>
> Because the register allocator cannot handle predicated
> instructions. So we explicitly disable predication
> until after reload.
>
>
> r~
>
then what is the use of having first if-conv pass...
and even what is use of doing if-conv after reload ?????
to have if-conv before reg allocation do we need to change reg allocator
it self???
regards
deepak