<div dir="ltr">Look at how the calling convention code does it when it legalizes :)<div><br></div><div>-eric</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Sep 9, 2014 at 2:28 PM, Reed Kotler <span dir="ltr"><<a href="mailto:reed.kotler@imgtec.com" target="_blank">reed.kotler@imgtec.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>How would you return a pair of
registers then?<br>
<br>
For example, If I lower 64 bit integer and materialize a constant,
i need to return a pair of 32 registers.<div><div class="h5"><br>
<br>
On 09/09/2014 01:49 PM, Eric Christopher wrote:<br>
</div></div></div><div><div class="h5">
<blockquote type="cite">
<div dir="ltr">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.
<div><br>
</div>
<div>-eric</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, Aug 31, 2014 at 10:41 AM, Reed
Kotler <span dir="ltr"><<a href="mailto:Reed.Kotler@imgtec.com" target="_blank">Reed.Kotler@imgtec.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I
understand that but falling back makes the compilation
slower.<br>
<br>
I'm wondering what could be done to remove this restriction
about fast-isel not being able to<br>
handle non legal types.<br>
<br>
<br>
________________________________________<br>
From: Anton Korobeynikov [<a href="mailto:anton@korobeynikov.info" target="_blank">anton@korobeynikov.info</a>]<br>
Sent: Sunday, August 31, 2014 12:55 AM<br>
To: Reed Kotler<br>
Cc: <a href="mailto:LLVMdev@cs.uiuc.edu" target="_blank">LLVMdev@cs.uiuc.edu</a><br>
Subject: Re: [LLVMdev] lowering and non legal types in
fast-isel<br>
<div>
<div><br>
Fastisel should fallback to usual selector in the cases
it cannot<br>
handle. So, for illegal types as well.<br>
<br>
On Sun, Aug 31, 2014 at 1:42 AM, reed kotler <<a href="mailto:rkotler@mips.com" target="_blank">rkotler@mips.com</a>>
wrote:<br>
> Fast-isel is not equipped in general to deal with
non legal types.<br>
><br>
> It would seem that an llvm assembler pass run after
clang but before llvm<br>
> could do the lowering though.<br>
><br>
> Any thoughts?<br>
><br>
> Reed<br>
><br>
> _______________________________________________<br>
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<br>
<br>
<br>
--<br>
With best regards, Anton Korobeynikov<br>
Faculty of Mathematics and Mechanics, Saint Petersburg
State University<br>
<br>
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</div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
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