[Dwarf-Discuss] modeling different address spaces

[David Blaikie]

On Fri, Aug 7, 2020 at 9:43 AM Pedro Alves via Dwarf-Discuss
<dwarf-discuss at lists.dwarfstd.org> wrote:
>
> Hi there!
>
> On 7/31/20 1:17 AM, Tye, Tony via Dwarf-Discuss wrote:
> > For optimized code involving multiple address spaces it is possible to run into cases where the location of a source language variable requires multiple address spaces. For example, a source variable may be optimized and different pieces may be in different places including memory of multiple address spaces, registers, etc. Describing this situation with a DW_AT_address_class on a source language variable is not possible as it provides a single address space that applies to the variable as a whole. The concept of "address space" is not available on the expression stack where a composite location description is created.
> >
> >
> >
> > Instead, making address space a property of memory location descriptions and making location descriptions a first-class concept on the expression stack solves the problem in a general way and leads to other nice properties.
>
> I am interesting in re-reading the document describing your changes, but the
> url that was pasted on the list before:
>
>  https://llvm.org/docs/AMDGPUDwarfProposalForHeterogeneousDebugging.html

https://llvm.org/docs/AMDGPUDwarfExtensionsForHeterogeneousDebugging.html

>
> is now returning "Not Found".  Did the document move somewhere else?
>
> Pedro Alves
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