[llvm-dev] how to type-legalize a dag

[Rail Shafigulin via llvm-dev]

On Fri, Mar 18, 2016 at 12:34 PM, Krzysztof Parzyszek <
kparzysz at codeaurora.org> wrote:

> On 3/18/2016 2:20 PM, Rail Shafigulin wrote:
>
>>
>> Given that the action is "Expand" how does legalizer know which
>> replacement to use for a given operation?
>>
>
> It's pretty much all hardcoded.  A more complex operation is rewritten in
> terms of simpler operations, which are more likely to be legal.
> Look in SelectionDAGLegalize::ExpandNode to see what happens in each case.
>
>
> -Krzysztof
>
> --
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted
> by The Linux Foundation
>

I see. Thanks!

-- 
Rail Shafigulin
Software Engineer
Esencia Technologies
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