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Re: [LTO] Flattening memory expressions?
Michael Matz wrote:
> Hi,
>
> On Thu, 8 Jun 2006, Daniel Berlin wrote:
>
>>>> Thoughts?
>>> We (me and Matz) thought over this as well and concluded it would be
>>> nice to have
>>>
>>> - MEM_REF ( base, offset, alias_tag )
>>>
>>> with base being either some memory object or an INDIRECT_REF of a
>>> pointer and be done with that tree code.
>> So if you have MEM_REF(INDIRECT_REF(a),i,0), you really haven't done any
>> better in removing recursion :)
>
> What type the first operand would be could be a one-bit flag in the
> MEM_REF itself. I.e. if there's an implicit INDIRECT_REF around the
> first operand, or not. The important part is only that the target address
> of that memory reference is computable completely trivially, namely by A +
> i, where A is either a or &a depending on that flag. And the more
> important thing anyway is that alias information of this specific mem
> reference encoded therein.
Not for data dependence it's not.
:)