accessing machine specific attributes from rtx

["Jan Beulich" <JBeulich at novell dot com>]

I would like to add a couple of optmization hint attributes to function declarations (and pointers to functions) to the IA64 targets, but I seem to have difficulty to understand how these attributes can be accessed when I have only rtx elements at hand. Specifically, the information is needed at the point where the function call is being expanded (in this case this would be in ia64_expand_call). I can see that attributes like 'pure', 'const', or 'noreturn' are being converted to notes in emit_call_1, but there does not seem to be a way to extend this scheme for a given machine. If the target were only direct function calls, then perhaps I could look up the declaration from the target function's name, but this is no alternative as it is supposed to work for indirect calls, too.

Thank you for any hints, Jan


i.A. Jan Beulich
Software Engineer Senior
Novell Core OS Engineering

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