llvm dev - Jul 2012 - [LLVMdev] Intr*Mem flags meaning

I'd like to clarify the meaning of "Intr*Mem" flags used in
intrinsics
definitions. If an intrinsic does not access memory but read and write
control registers, what flag should I apply in this case: IntrNoMem or
IntrReadWriteArgMem or nothing?

Thanks.

--
Simon

On Tue, Jul 17, 2012 at 12:55 PM, Simon Atanasyan <satanasyan at mips.com>
wrote:
> I'd like to clarify the meaning of "Intr*Mem" flags used in
intrinsics
> definitions. If an intrinsic does not access memory but read and write
> control registers, what flag should I apply in this case: IntrNoMem or
> IntrReadWriteArgMem or nothing?
Nothing; control registers are still "memory" in the sense of Intr*Mem
because they hold state.  It doesn't matter that they aren't
addressable.

-Eli