llvm dev - Mar 2012 - [LLVMdev] Adding a new function attribute

Hello,

I'm adding a new function attribute in clang and llvm for a backend I'm
writing that treats prolog and epilogue code in a special way inside
interrupt handlers, similar to what naked does. One way I've seen to do
this is to add a new attribute type in Attributes.h, however to me it feels
bad to add a target dependent attribute into this place which is very
target independent. So what's the best way to do this or is there an api to
handle this kind of issues?

Thanks for the help.
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On Sun, Mar 4, 2012 at 9:07 PM, Borja Ferrer <borja.ferav at gmail.com>
wrote:
> I'm adding a new function attribute in clang and llvm for a backend
I'm
> writing that treats prolog and epilogue code in a special way inside
> interrupt handlers, similar to what naked does. One way I've seen to do
this
> is to add a new attribute type in Attributes.h, however to me it feels bad
> to add a target dependent attribute into this place which is very target
> independent. So what's the best way to do this or is there an api to
handle
> this kind of issues?
FWIW, GCC has something similar.

In LLVM IR, interrupt handlers could be considered either a function
attribute or a calling convention. I don't have a particular
preference. If using a CC, I'd suggest making it be target neutral
like fastcc.

deep