[PATCH] [RFC] Deprecated feature in TableGen

Tom Stellard tom at stellard.net
Wed Aug 14 09:57:33 PDT 2013


On Wed, Aug 14, 2013 at 05:35:47PM +0100, Tim Northover wrote:
> Hi Tom,
> 
> > Does deprecating an instruction mean the hardware doesn't support it or
> > does it mean the hardware supports it, but the compiler does not?
> 
> Possibly neither. I think in this context it means that ARM has given
> warning that future versions of the architecture may/will not support
> the instruction. The compiler probably will still assemble it, and may
> even still emit it (though probably shouldn't when compiling for v8).
>

Ok, that makes sense.  So then is the purpose of marking instructions as
deprecated to warn people who are hand writing assembly code?

-Tom



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