[llvm-dev] Exception handling support for a target

[Krzysztof Parzyszek via llvm-dev]

On 1/15/2018 6:49 AM, 陳韋任 via llvm-dev wrote:
> - EH_RETURN:
> 
>    I see some targets define their own EH_RETURN SDNode, others don't. 
> What is EH_RETURN, and under what circumstances I should define my own 
> EH_RETURN SDNode?

This corresponds to a GCC intrinsic used in their unwind routines. It's 
not really known for its exemplary documentation, so you may need to 
read GCC's sources to see what they are doing with it.
Unless you plan to compile GCC's unwind library, you don't really need 
to worry about it.

-Krzysztof

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