On 02/19/2018 09:45 AM, Joseph Myers wrote:
On Sun, 18 Feb 2018, Sandra Loosemore wrote:

Thanks, this makes sense.  I think I could produce a documentation patch that
explains that the difference is early vs late inclusion, and explains that any
declarations involving tree or rtx types must go in $target-protos.h because
those types are not defined when $target.h is included.

That's not the case now for tree or rtx types, since they're (forward)
declared in coretypes.h.  It may still be the case for some types, but not

OK, I think I misunderstood your previous message -- it's the machine_mode-related types that have the circular dependency, but rtx and tree no longer do. Is that right?

So am I right in thinking it is actually not possible to have a .h file for
internal bits shared between $target.c and the .md files, without hacking e.g.
genrecog.c which currently emits a fixed set of include directives?

I'm not aware of a way to do that.

Thinking about it some more, perhaps in $target-protos.h

#include "$target-internal.h"



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