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spirv: Add generic pointer support

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Most of this is fairly straightforward; we just set all the modes on any
derefs which are generic.  The one tricky bit is OpGenericCastToPtrExplicit.
Instead of adding NIR intrinsics to do the cast, we add NIR intrinsics
to do a storage class check and then bcsel based on that.

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6332>
This commit is contained in:
Jason Ekstrand
2020-08-14 23:41:14 -05:00
committed by Marge Bot
parent d6415b5d2b
commit a8e53a772f
8 changed files with 124 additions and 6 deletions
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5
src/compiler/nir/nir_intrinsics.py
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@@ -212,6 +212,11 @@ intrinsic("get_ssbo_size", src_comp=[-1], dest_comp=1,
intrinsic("get_ubo_size", src_comp=[-1], dest_comp=1,
flags=[CAN_ELIMINATE, CAN_REORDER])
# Intrinsics which provide a run-time mode-check. Unlike the compile-time
# mode checks, a pointer can only have exactly one mode at runtime.
intrinsic("deref_mode_is", src_comp=[-1], dest_comp=1,
indices=[MEMORY_MODES], flags=[CAN_ELIMINATE, CAN_REORDER])
# a barrier is an intrinsic with no inputs/outputs but which can't be moved
# around/optimized in general
def barrier(name):