| commit | aa3875411746de0a24a8de0d40def711cd70153d | [log] [tgz] |
|---|---|---|
| author | Slava Zakharin <szakharin@nvidia.com> | Mon Mar 10 11:08:37 2025 -0700 |
| committer | GitHub <noreply@github.com> | Mon Mar 10 11:08:37 2025 -0700 |
| tree | 11f69fe0d3e049372db0d25dd368ddb432728598 | |
| parent | 35c030208642ddae96ed7a03b73c7d08c6997052 [diff] |
[RFC][flang] Add support for assumed-shape dummy arrays repacking. (#127147)
This is a document describing why and how to add support for repacking
of assumed-shape dummy arrrays to provide more efficient data cache.
It proposes adding new FIR operations and outlines the compiler flow
handling these operations.
I would like to hear feedback on all of it, but especially on:
* The possibility of detecting safeness of the repacking
in the context of OpenACC/OpenMP. If it is not possible
to do the runtime checks to determine safety, then
there is not need to add the `TempCopyIsSafe` attributes
to the instruction.
* Whether it is possible to preserve the debug information
in cases where `fir.pack_array` is sunk after `[hl]fir.declare`,
so that before the `fir.pack_array` a debugger will refer
to the values in the original array, and after `fir.pack_array`
it will refer to the copy.
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