tree 0a3cd20556bd6dcf05ea9ea8042db0b83056e77c
parent 895cf38f45628351f8c618870504913dcbe72582
author Lei Zhang <antiagainst@google.com> 1670012778 -0800
committer GitHub <noreply@github.com> 1670012778 -0800
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Plumb through support for controlling subgroup size in CodeGen (#11388)

This commit plumbs through support for controlling subgroup size (i.e.,
VK_EXT_subgroup_size_control for Vulkan) in CodeGen:

- Added a new subgroup size attribute to HAL ExecutableExportOp, similar
to workgroup size there.
- Extended various helper functions to optionally set subgroup size.
- Defined VK_EXT_subgroup_size_control and updated various target
triples regarding min/max subgroup size.

This commit just thread support through CodeGen flow; it's not wired up
into runtime to use yet, which will happen later.