[llvm-dev] Instruction selection for 'load' based on static vs. dynamic data

[Krzysztof Parzyszek via llvm-dev]

On 5/9/2017 10:06 AM, Dr. ERDI Gergo wrote:
> On Tue, 9 May 2017, Krzysztof Parzyszek wrote:
> 
>> You can have any tree of machine instructions as the output.
> 
> Cool! Even better would be if I could use non-machine (LLVM) 
> instructions in the output pattern, and let ISel do its job on it. Is 
> there a way to do that?

You can either have a target-specific DAG-combine function, or you can 
use "PreprocessISelDAG", but there is no way to do it in .td files.

-Krzysztof

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