This commit introduces a new function nir_assign_linked_io_var_locations
which is intended to help with assigning driver locations to shaders
during linking, primarily aimed at the VS->TCS->TES->GS stages.
It ensures that the linked shaders have the same driver locations,
and it also packs these as close to each other as possible.
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4388>
If we have a clip dist float[1] compact followed by a tess factor
float[2] we don't want to overlap them, but the partial check
only happens for non-compact vars.
This fixes some issues seen with my sw vulkan layer with
dEQP-VK.clipping.user_defined.clip_distance*
v2: v1 failed with clip/cull mixtures, since in that
case the cull has a location_frac to follow after the clip
so only reset if we get a location_frac of 0 in a subsequent
clip var
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4635>
If a nir_variable is tagged with per_view, it must be an array with
size corresponding to the number of views. For slot-tracking, it is
considered to take just the slot for a single element -- drivers will
take care of expanding this appropriately.
This will be used to implement the ability of having per-view position
in a vertex shader in Intel platforms.
Acked-by: Rafael Antognolli <rafael.antognolli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2313>
Unlike other stages TCS outputs not read by the TES cannot always
be demoted to globals e.g. when they are read by other TCS
invocations.
We were not taking these outputs into account when packing which
could result in other outputs being assigned to the same location.
Here we make sure to gather information on these outputs and group
them together when packing.
This fixes rendering issues in QUBE 2 via Proton.
Closes: #2653
Fixes: 26aa460940 ("nir: rewrite varying component packing")
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4328>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4328>
From the SPV_AMD_shader_explicit_vertex_parameter extension:
"Returns the value of the input <interpolant> without any
interpolation, i.e. the raw output value of previous shader
stage."
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>
When handling two variables with overlapping locations, we process the
one with lower location first, and then extend the location ->
driver_location map to guarantee that it's contiguous for the second
variable too. But the loop had the wrong bound, so we weren't extending
the map 100%, which could lead to problems later such as an incorrect
num_inputs. The loop index i is an index into the slots of the variable,
so we need to stop at the final slot of the variable (var_size) instead
of the number of unassigned slots.
This fixes
spec@arb_enhanced_layouts@execution@component-layout@vs-fs-array-interleave-range
on radeonsi NIR.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
It was double-counting cases where multiple variables were assigned to
the same slot, and not handling the case where the last variable is a
compact variable.
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
These are used in Vulkan for clip/cull distances, instead of the GLSL
lowering when the clip/cull arrays are shared.
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
It isn't really doing anything Gallium-specific, and it's needed for
handling component packing, overlapping, etc.
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Used same syntax as elsewhere with Mesa sources, verified result
against MSVC with godbolt.org.
fixes following warning with clang:
warning: suggest braces around initialization of subobject
v2: empty braces -> braces around subobject (Caio, Kristian)
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
We were only setting the used mask for the first component of a
varying. Since the linking opts split vectors into scalars this
has mostly worked ok.
However this causes an issue where for example if we split a
struct on one side of the interface but not the other, then we
can possibly end up removing the first components on the side
that was split and then incorrectly remove the whole struct
on the other side of the varying.
With this change we simply mark all 4 components for each slot
used by a struct. We could possibly make this more fine gained
but that would require a more complex change.
This fixes a bug in Strange Brigade on RADV when tessellation
is enabled, all credit goes to Samuel Pitoiset for tracking down
the cause of the bug.
Fixes: f1eb5e6399 ("nir: add component level support to remove_unused_io_vars()")
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
When gathering info for unmovable types we need to handle arrays.
While we dont support packing/moving arrays we do support packing
scalar components with these arrays.
Fixes piglit:
tests/spec/arb_enhanced_layouts/execution/component-layout/vs-fs-array-interleave-range.shader_test
Fixes: 5eb17506e1 ("nir: do not pack varying with different types")
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
The current algorithm only supports packing 32-bit types.
If a shader uses both 16-bit and 32-bit varyings, we shouldn't
compact them together.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
In some cases, we can end up with varying structs that aren't split to
their member variables. nir_compact_varyings attempted to record these
as unmovable, so it would leave them be. Unfortunately, it didn't do
it right for non-vector/scalar types. It set the mask to:
((1 << (elements * dmul)) - 1) << var->data.location_frac
where elements is the number of vector elements. For structures and
other non-vector/scalars, elements is 0...so the whole mask became 0.
This caused nir_compact_varyings to assign other varyings on top of
the structure varying's location (as it appeared to take up no space).
To combat this, we just set elements to 4 for non-vector/scalar types,
so that the entire slot gets marked as unmovable.
Fixes KHR-GL45.tessellation_shader.tessellation_control_to_tessellation_evaluation.gl_in on iris.
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
There are a number of reasons for the rewrite.
1. Adding support for packing tess patch varyings in a sane way.
2. Making use of qsort allowing the code to be much easier to
follow.
3. Fixes a bug where different interp types caused component
packing to be skipped for all varyings in some scenarios.
4. Allows us to add a crude live range analysis for deciding
which components should be packed together. This support can
optionally be added in a future patch.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This will be used in the following patches to determine if we
support packing the components of a varying.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This adds support needed for marking the varyings as used but we
don't actually support packing patches in this patch.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
When a xfb buffer is explicitely declared on a varying
variable, we shouldn't remove it at link time.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Replace calls to create hash tables and sets that use
_mesa_hash_pointer/_mesa_key_pointer_equal with the helpers
_mesa_pointer_hash_table_create() and _mesa_pointer_set_create().
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Acked-by: Eric Engestrom <eric@engestrom.ch>
the naming is a bit confusing no matter how you look at it. Within SPIR-V
"global" memory is memory accessible from all threads. glsl "global" memory
normally refers to shader thread private memory declared at global scope. As
we already use "shared" for memory shared across all thrads of a work group
the solution where everybody could be happy with is to rename "global" to
"private" and use "global" later for memory usually stored within system
accessible memory (be it VRAM or system RAM if keeping SVM in mind).
glsl "local" memory is memory only accessible within a function, while SPIR-V
"local" memory is memory accessible within the same workgroup.
v2: rename local to function as well
v3: rename vtn_variable_mode_local as well
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This just cleans things up a little and make things more safe for
derefs.
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-by: Eric Anholt <eric@anholt.net>
This will be reused by the following patch.
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
The following patches will add support for an additional
optimisation so this function will no longer just optimise varying
constants.
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This is instead of looking all the way back to the variable which may
not exist for all derefs. This makes this code properly ignore casts
with modes other than the mode[s] we care about (where casts aren't
allowed).
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
The linking opts shouldn't try removing or compacting XFB varyings
in the consumer. To avoid this we copy the always_active_io flag
from the producer.
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
For gallium drivers where you want to do some linking at variant compile
time, you don't have the other producer/consumer shader on hand to modify.
By exposing the inner function, the driver can have the used varyings in
the compiled shader cache key and still do linking.
This is also useful for V3D, where the binning shader wants to only output
position and TF varyings. We've been removing those after nir_lower_io,
but this will be less driver-specific code and let more of the shader get
DCEed early in NIR.
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This will be removed at the end of the transition, but add some tracking
plus asserts to help ensure that lowering passes are called at the
correct point (pre or post deref instruction lowering) as passes are
converted and the point where lower_deref_instrs() is called is moved.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This was originally intended to make sure the remap location
was not -1. However the code has changed alot since then,
the location is now never set to -1 and we also handle
components meaning this old assert has been doing comparisions
with the pointer to the array of component data.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105183
If we don't remap and output this code would trample the outputs
read bits.
This fixes a regression in
dEQP-VK.tessellation.shader_input_output.barrier
Fixes: 1c9c42d16b (nir: add varying component packing helpers)
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>
v2: update shader info input/output masks when pack components
v3: make sure interpolation loc matches, this is required for the
radeonsi NIR backend.
v4: 33dca36f4f fixed nir_gather_info to update outputs_read
correct, make sure we also adjust this correctly when
packing components.
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> (v1)
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com> (v3)
The initial helpers add support for removing unused varyings between
stages.
V2:
- Moved the io mask helper function into this file rather than
nir.h so it's not used elsewhere considering it doesn't handle
all corner cases.
- Use bitmask rather than hash table to handle tcs outputs (Ken)
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
