[LLVMdev] understanding DAG: node creation

[Dmitri Kovalenko]

I have an intrinsic and it must be lowered to instruction, which works with
fixed register.
So, it takes contents of this register and another argument as input. After
execution, the result of the instruction is placed into that same fixed
register.

What should I do in SelectionDAGBuilder::visitIntrinicCall to describe such
behaviour for a SDNode?

Thank you for the ideas and insights.
-- 
Sincerely,
Dmitri Kovalenko
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