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<div class="moz-cite-prefix">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.<br>
<br>
On 09/09/2014 01:49 PM, Eric Christopher wrote:<br>
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<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.
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<div>-eric</div>
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<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, Aug 31, 2014 at 10:41 AM, Reed
Kotler <span dir="ltr"><<a moz-do-not-send="true"
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 moz-do-not-send="true"
href="mailto:anton@korobeynikov.info">anton@korobeynikov.info</a>]<br>
Sent: Sunday, August 31, 2014 12:55 AM<br>
To: Reed Kotler<br>
Cc: <a moz-do-not-send="true"
href="mailto:LLVMdev@cs.uiuc.edu">LLVMdev@cs.uiuc.edu</a><br>
Subject: Re: [LLVMdev] lowering and non legal types in
fast-isel<br>
<div class="HOEnZb">
<div class="h5"><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
moz-do-not-send="true" href="mailto:rkotler@mips.com">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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