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nir: add a nir_get_ubo_size intrinsic

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This is the same as nir_get_buffer_size but geared towards UBOs instead
of SSBOs. The new intrinsic is useful in Vulkan backends that need to
add bound checks on buffer accesses to honor the robust buffer access
feature.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
This commit is contained in:
Iago Toral Quiroga 2020-08-26 11:46:55 +02:00 • committed by Marge Bot
parent 4823313587
commit f4c754bcd1
1 changed files with 2 additions and 0 deletions
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2
src/compiler/nir/nir_intrinsics.py
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@ -209,6 +209,8 @@ intrinsic("deref_buffer_array_length", src_comp=[-1], dest_comp=1,
# as source.
intrinsic("get_ssbo_size", src_comp=[-1], dest_comp=1,
flags=[CAN_ELIMINATE, CAN_REORDER])
intrinsic("get_ubo_size", src_comp=[-1], dest_comp=1,
flags=[CAN_ELIMINATE, CAN_REORDER])
# a barrier is an intrinsic with no inputs/outputs but which can't be moved
# around/optimized in general