When we don't need emulation of first vertex, base instance, draw ID
sysvals, or triangle fans, we can have very simple command signatures
and indirect arg buffer generation shaders. The next step is to handle
the case where everything can be supported straight from the app's
buffer.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28383>
Ubo0 is tricky. It exists if there were any uniforms when
lower_uniforms_to_ubo was run. If we try to run that ourselves,
it might be too late and DCE/remove_dead_variables might've been run,
which removed the uniforms and their accesses, without decrementing
num_uniforms. So we have no good way of knowing whether to declare
ubos from [0, N] or [1, N]. In practice this probably doesn't make
much of a difference but the logic is there so ¯\_(ツ)_/¯
If we use the nir option, then dead code isn't run, and num_uniforms
is a true indicator of whether ubo0 exists or not.
Note that this means we are no longer running this pass for internal
shaders that don't come from the GLSL compiler, so various places are
updated to query the nir info bit that's set by running this pass.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28535>
All UAVs which can be accessed via pointer need to be grouped together
starting at base 0, because nir_to_dxil emits the globals array from
[0, size], where size is the input number of globals, as well as one
for each SSBO. Images need to come after that.
Theoretically, nir_to_dxil could emit 3 arrays:
1. Globals
2. Constants
3. Printf
But constants get converted to globals early on so that'd be pretty
tricky to actually detangle.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26803>
These were intended to be shared with (e.g.) rusticl, but they're
unused and I expect they will continue to be. The spirv options
are also hardcoded to be what CLOn12 expects.
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26803>
When a kernel input is a pointer to global or constant memory, it's expected
that the invoker provides the pointer value in the form of
(buffer_index << 32) | offset. The buffer index, however, is statically
knowable in the compiler, as long as a buffer is bound. Since it's
undefined behavior to dereference the pointer with no buffer bound,
we can replace any deref chain that terminates in an access with one
that uses a constant buffer index.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26803>
These handles can be emitted in control flow, which means that the handle
might be in a block which does not dominate a block that's processed
later on, which results in incorrect DXIL if we try to reference it.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26803>
Flip on the caps/extensions, use their presence to turn on bindless just like
descriptor_indexing, use the buffer flag to indicate UAV access, and fix up
the getter to return the kind of data we want.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28028>
This works similarly to the CL compiler, where a 64-bit address is
decomposed into a 32-bit index and offset. But unlike CL, where the
index is into a per-kernel array of bound buffers, for Vulkan it points
into the global device-wide descriptor heap.
For all global deref chains that terminate in a load/store/atomic, create
a parallel deref chain that begins by decomposing the pointer to a vec2,
followed by a load_vulkan_descriptor, and then an SSBO deref chain. Any instance
where the original deref chain was used for something else will remain as
global derefs, so also run lower_explicit_io for global to produce appropriate
pointer math.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28028>
HLSL docs say WaveReadLaneAt is undefined if the target lane is inactive. This makes
sense since the target lane may need to *send* the data, rather than it being pulled
by the calling lane. So don't early-out on the loop, iterate through the whole wave
on all threads and read the cross-lane data before branching.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27624>
Apparently spiregg can produce not-taken branches that somehow try
to access textures that aren't actually declared. These branches
need to be trimmed before any texture lowering is done.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27531>
