[cfe-dev] Custom calling conventions in C code
clattner at apple.com
Thu Jul 10 12:56:29 PDT 2008
On Jul 10, 2008, at 12:19 PM, Matthijs Kooijman wrote:
>> or whatever. The best way to do this is to have __interrupt__ be a
>> target-specific #define for __attribute__((interrupt)) and then
>> have your
>> target handle the interrupt attribute however you want.
>> Yep, supporting specific calling conventions is fine, I just don't
>> something like:
> Okay, sounds reasonable. However, is there any generic way to do
> this in
> clang, or will I end up locally patching clang for this?
> If the latter is the case, might function annotation be an
> Currently, I can specify __attribute__((annotate("foo"))) for global
> variables, but not for functions (both in clang and gcc). I'm not
> sure where
> this limitation comes from, but enabling generic annotation for
> should also work for me (I can simply add a frontend pass that
> those annotations into calling conventions for my backend, or leave
> them as
> annotions even).
You could use attr(annotate). I think attributes in general can only
be put on function forward declarations, not definitions.
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