[LLVMdev] lowering and non legal types in fast-isel

[Eric Christopher]

You can do everything from legalize it yourself, or just add code to select
it and legalize it in your backend during instruction selection. fast-isel
now has support for completely avoiding the target independent version of
the code.

-eric

On Sun, Aug 31, 2014 at 10:41 AM, Reed Kotler <Reed.Kotler at imgtec.com>
wrote:

> I understand that but falling back makes the compilation slower.
>
> I'm wondering what could be done to remove this restriction about
> fast-isel not being able to
> handle non legal types.
>
>
> ________________________________________
> From: Anton Korobeynikov [anton at korobeynikov.info]
> Sent: Sunday, August 31, 2014 12:55 AM
> To: Reed Kotler
> Cc: LLVMdev at cs.uiuc.edu
> Subject: Re: [LLVMdev] lowering and non legal types in fast-isel
>
> Fastisel should fallback to usual selector in the cases it cannot
> handle. So, for illegal types as well.
>
> On Sun, Aug 31, 2014 at 1:42 AM, reed kotler <rkotler at mips.com> wrote:
> > Fast-isel is not equipped in general to deal with non legal types.
> >
> > It would seem that an llvm assembler pass run after clang  but before
> llvm
> > could do the lowering though.
> >
> > Any thoughts?
> >
> > Reed
> >
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
>
> --
> With best regards, Anton Korobeynikov
> Faculty of Mathematics and Mechanics, Saint Petersburg State University
>
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>
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