Commit graph

117072 commits

Author SHA1 Message Date
Lionel Landwerlin
92b7407090 i965: include draw_params/derived_draw_params for VF cache workaround
These buffers are using VB slots and should be included in the
workaround decision.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Fixes: a363bb2cd0 ("i965: Allocate VMA in userspace for full-PPGTT systems.")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109072
2019-01-04 11:18:54 +00:00
Lionel Landwerlin
da634a4acb intel/blorp: emit VF caching workaround before 3DSTATE_VERTEX_BUFFERS
Probably no difference but it's nice to have i965 & blorp emit things
in the same order.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2019-01-04 11:18:51 +00:00
Lionel Landwerlin
e5ed217545 i965: limit VF caching workaround to gen8/9/10
Documentation of the 3DSTATE_VERTEX_BUFFERS packet says this is only
needed before ICL.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2019-01-04 11:18:48 +00:00
Andres Gomez
f0312cfa93 glsl/linker: complete documentation for assign_attribute_or_color_locations
Commit 27f1298b9d ("glsl/linker: validate attribute aliasing before optimizations")
forgot to complete the documentation.

Cc: Tapani Pälli <tapani.palli@intel.com>
Signed-off-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
2019-01-04 09:04:31 +02:00
Gurchetan Singh
6b7aea9d85 virgl: remove empty file
Fixes: 174f53 ("virgl: consolidate transfer code")
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
2019-01-03 20:59:29 +01:00
Gurchetan Singh
ca66457b05 virgl: don't flush an empty range
Otherwise, the gl-1.0-long-dlist Piglit test crashes.

Fixes: db7757 ("virgl: modify how we handle GL_MAP_FLUSH_EXPLICIT_BIT")
Reported by airlied@

v2: Exit on any invalid range (Erik)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109190
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Tested-by: Jakob Bornecrantz <jakob@collabora.com>
2019-01-03 20:59:29 +01:00
Eric Engestrom
393a756e6a docs: advertise distro-provided meson cross-files
Hopefully we can kick start the revolution and other distros will start
providing them as well :)

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
2019-01-03 18:53:21 +00:00
Eric Engestrom
8b363bc42e docs: fix the meson aarch64 cross-file
`gcc-ar` is preferred over the generic `ar`, and the `arm` family is
for 32-bit ARM [1].

[1] https://mesonbuild.com/Reference-tables.html#cpu-families

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
2019-01-03 18:53:21 +00:00
Jakob Bornecrantz
6a9be6fc0c virgl/vtest: Use default socket name from protocol header
No functional change as the socket name is the same,
just removing the double definition of the path.

Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>
2019-01-03 15:50:38 +00:00
Rob Clark
e869481ef3 freedreno: fix staging resource size for arrays
A 2d-array texture (for example), should get the # of array elements
from box->depth, rather than depth0 which is minified.

Fixes dEQP-GLES3.functional.shaders.texture_functions.texture.sampler2darray_bias_float_fragment
with tiled textures.

Reported-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
2019-01-03 08:11:40 -05:00
Rob Clark
67a7f6f244 freedreno: remove blit_via_copy_region()
If we hit the memcpy() path for copy_region(), that will try to do a
transfer_map(), which goes badly for blits to/from staging triggered
by transfer_map() or transfer_unmap().

We could possibly add fd_blit2() which has allow_transfer_map param,
and call that for staging blits.  But I'm not really sure if trying
the blit via copy_region() is very useful.  At least for newer gens
that implement fd_context::blit(), it probably isn't.

Signed-off-by: Rob Clark <robdclark@gmail.com>
2019-01-03 08:10:32 -05:00
Rob Clark
2fc17e16a3 freedreno/a6xx: rework blitter API
Switch over to using fd_context::blit(), in the same way that a5xx does.
The previous patch wires fd_resource_copy_region() up to the blitter so
a6xx no longer needs to bypass the core layer to accelerate this.

Signed-off-by: Rob Clark <robdclark@gmail.com>
2019-01-03 08:10:23 -05:00
Rob Clark
53b8eb78d5 freedreno: try blitter for fd_resource_copy_region()
Signed-off-by: Rob Clark <robdclark@gmail.com>
2019-01-03 08:10:16 -05:00
Rob Clark
228eddd7ee freedreno: rework blit API
First step to unify the way fd5 and fd6 blitter works.  Currently a6xx
bypasses the blit API in order to also accelerate resource_copy_region()

But this approach can lead to infinite recursion:

  #0  fd_alloc_staging (ctx=0x5555936480, rsc=0x7fac485f90, level=0, box=0x7fbab29220) at ../src/gallium/drivers/freedreno/freedreno_resource.c:291
  #1  0x0000007fbdebed04 in fd_resource_transfer_map (pctx=0x5555936480, prsc=0x7fac485f90, level=0, usage=258, box=0x7fbab29220, pptrans=0x7fbab29240) at ../src/gallium/drivers/freedreno/freedreno_resource.c:479
  #2  0x0000007fbe5c5068 in u_transfer_helper_transfer_map (pctx=0x5555936480, prsc=0x7fac485f90, level=0, usage=258, box=0x7fbab29220, pptrans=0x7fbab29240) at ../src/gallium/auxiliary/util/u_transfer_helper.c:243
  #3  0x0000007fbde2dcb8 in util_resource_copy_region (pipe=0x5555936480, dst=0x7fac485f90, dst_level=0, dst_x=0, dst_y=0, dst_z=0, src=0x7fac47c780, src_level=0, src_box_in=0x7fbab2945c) at ../src/gallium/auxiliary/util/u_surface.c:350
  #4  0x0000007fbdf2282c in fd_resource_copy_region (pctx=0x5555936480, dst=0x7fac485f90, dst_level=0, dstx=0, dsty=0, dstz=0, src=0x7fac47c780, src_level=0, src_box=0x7fbab2945c) at ../src/gallium/drivers/freedreno/freedreno_blitter.c:173
  #5  0x0000007fbdf085d4 in fd6_resource_copy_region (pctx=0x5555936480, dst=0x7fac485f90, dst_level=0, dstx=0, dsty=0, dstz=0, src=0x7fac47c780, src_level=0, src_box=0x7fbab2945c) at ../src/gallium/drivers/freedreno/a6xx/fd6_blitter.c:587
  #6  0x0000007fbde2f3d0 in util_try_blit_via_copy_region (ctx=0x5555936480, blit=0x7fbab29430) at ../src/gallium/auxiliary/util/u_surface.c:864
  #7  0x0000007fbdec02c4 in fd_blit (pctx=0x5555936480, blit_info=0x7fbab29588) at ../src/gallium/drivers/freedreno/freedreno_resource.c:993
  #8  0x0000007fbdf08408 in fd6_blit (pctx=0x5555936480, info=0x7fbab29588) at ../src/gallium/drivers/freedreno/a6xx/fd6_blitter.c:546
  #9  0x0000007fbdebdc74 in do_blit (ctx=0x5555936480, blit=0x7fbab29588, fallback=false) at ../src/gallium/drivers/freedreno/freedreno_resource.c:129
  #10 0x0000007fbdebe58c in fd_blit_from_staging (ctx=0x5555936480, trans=0x7fac47b7e8) at ../src/gallium/drivers/freedreno/freedreno_resource.c:326
  #11 0x0000007fbdebea38 in fd_resource_transfer_unmap (pctx=0x5555936480, ptrans=0x7fac47b7e8) at ../src/gallium/drivers/freedreno/freedreno_resource.c:416
  #12 0x0000007fbe5c5c68 in u_transfer_helper_transfer_unmap (pctx=0x5555936480, ptrans=0x7fac47b7e8) at ../src/gallium/auxiliary/util/u_transfer_helper.c:516
  #13 0x0000007fbde2de24 in util_resource_copy_region (pipe=0x5555936480, dst=0x7fac485f90, dst_level=0, dst_x=0, dst_y=0, dst_z=0, src=0x7fac47b8e0, src_level=0, src_box_in=0x7fbab2997c) at ../src/gallium/auxiliary/util/u_surface.c:376
  #14 0x0000007fbdf2282c in fd_resource_copy_region (pctx=0x5555936480, dst=0x7fac485f90, dst_level=0, dstx=0, dsty=0, dstz=0, src=0x7fac47b8e0, src_level=0, src_box=0x7fbab2997c) at ../src/gallium/drivers/freedreno/freedreno_blitter.c:173
  #15 0x0000007fbdf085d4 in fd6_resource_copy_region (pctx=0x5555936480, dst=0x7fac485f90, dst_level=0, dstx=0, dsty=0, dstz=0, src=0x7fac47b8e0, src_level=0, src_box=0x7fbab2997c) at ../src/gallium/drivers/freedreno/a6xx/fd6_blitter.c:587
  ...

Instead rework the API to push the fallback back to core code, so that
we can rework resource_copy_region() to have it's own fallback path,
and then finally convert fd6 over to work in the same way.

This also makes ctx->blit() optional, and cleans up some unnecessary
callers.

Signed-off-by: Rob Clark <robdclark@gmail.com>
2019-01-03 08:09:52 -05:00
Rob Clark
f1c88336e6 freedreno: skip depth resolve if not written
For multi-pass rendering, it is common to keep the same depth buffer
from previous pass, to discard geometry that would be hidden by later
draws.  In the later passes with depth-test enabled, but depth-write
disabled, there is no reason to do gmem2mem resolve.

TODO probably do something similar for stencil.. although stencil
buffer isn't used as commonly these days

Signed-off-by: Rob Clark <robdclark@gmail.com>
2019-01-03 08:09:24 -05:00
Timothy Arceri
4d3f6cb973 nir: merge some basic consecutive ifs
After trying multiple times to merge if-statements with phis
between them I've come to the conclusion that it cannot be done
without regressions. The problem is for some shaders we end up
with a whole bunch of phis for the merged ifs resulting in
increased register pressure.

So this patch just merges ifs that have no phis between them.
This seems to be consistent with what LLVM does so for radeonsi
we only see a change (although its a large change) in a single
shader.

Shader-db results i965 (SKL):

total instructions in shared programs: 13098176 -> 13098152 (<.01%)
instructions in affected programs: 1326 -> 1302 (-1.81%)
helped: 4
HURT: 0

total cycles in shared programs: 332032989 -> 332037583 (<.01%)
cycles in affected programs: 60665 -> 65259 (7.57%)
helped: 0
HURT: 4

The cycles estimates reported by shader-db for i965 seem inaccurate
as the only difference in the final code is the removal of the
redundent condition evaluations and jumps.

Also the biggest code reduction (~7%) for radeonsi was in a tomb
raider tressfx shader but for some reason this does not get merged
for i965.

Shader-db results radeonsi (VEGA):

Totals from affected shaders:
SGPRS: 232 -> 232 (0.00 %)
VGPRS: 164 -> 164 (0.00 %)
Spilled SGPRs: 59 -> 59 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 14584 -> 13520 (-7.30 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Max Waves: 13 -> 13 (0.00 %)
Wait states: 0 -> 0 (0.00 %)

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
2019-01-03 15:17:16 +11:00
Timothy Arceri
19cafe8084 nir: add rewrite_phi_predecessor_blocks() helper
This will also be used by the if merge pass in the following commit.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
2019-01-03 15:17:16 +11:00
Timothy Arceri
5122fbc4ba nir: simplify does_varying_match()
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
2019-01-03 11:47:56 +11:00
Timothy Arceri
8d05ee2005 nir: make use of does_varying_match() helper
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
2019-01-03 11:47:56 +11:00
Timothy Arceri
0016166d19 nir: make nir_opt_remove_phis_impl() static
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
2019-01-03 11:47:56 +11:00
Eric Anholt
d2b899c0ec v3d: Refactor compiler entrypoints.
Before, I had per-stage entryoints with some helpers shared between them.
As I extended for compute shaders and shader-db, it turned out that the
other common code in the middle wanted to be shared too.
2019-01-02 14:12:29 -08:00
Eric Anholt
0805060573 v3d: Handle dynamically uniform IF statements with uniform control flow.
Loops will be trickier, since we need some analysis to figure out if the
breaks/continues inside are uniform.  Until we get that in NIR, this gets
us some quick wins.

total instructions in shared programs: 6192844 -> 6174162 (-0.30%)
instructions in affected programs: 487781 -> 469099 (-3.83%)
2019-01-02 14:12:29 -08:00
Eric Anholt
5e9ee6e841 v3d: Fold comparisons for IF conditions into the flags for the IF.
total instructions in shared programs: 6193810 -> 6192844 (-0.02%)
instructions in affected programs: 800373 -> 799407 (-0.12%)
2019-01-02 14:12:29 -08:00
Eric Anholt
078dc176bc v3d: Don't try to fold non-SSA-src comparisons into bcsels.
There could have been a write of a src in between the comparison and the
bcsel that would invalidate the comparison.
2019-01-02 14:12:29 -08:00
Eric Anholt
2e0433b687 v3d: Move the "Find the ALU instruction generating our bool" out of bcsel.
This will be reused for if statements.
2019-01-02 14:12:29 -08:00
Eric Anholt
c3ae0aa264 v3d: Simplify the emission of comparisons for the bcsel optimization.
I wanted to reuse the comparison stuff for nir_ifs, but for that I just
want the flags and no destination value.  Splitting the conditions from
the destinations ended up cleaning the existing code up, anyway.
2019-01-02 14:12:29 -08:00
Eric Anholt
49d8e2aff1 v3d: Don't forget to include RT writes in precompiles.
Looking at some assembly dumps for an optimization, we were clearly
missing important parts of the shader!
2019-01-02 14:12:29 -08:00
Eric Anholt
3a81c753a3 v3d: Fix segfault when failing to compile a program.
We'll still fail at draw time, but this avoids a regression in shader-db
execution once I enable TLB writes in precompiles.

Fixes: b38e4d313f ("v3d: Create a state uploader for packing our shaders together.")
2019-01-02 14:12:29 -08:00
Marek Olšák
3ae57957be radeonsi: always unmap texture CPU mappings on 32-bit CPU architectures
Team Fortress 2 32-bit version runs out of the CPU address space.

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
2019-01-02 15:01:59 -05:00
Marek Olšák
edfca1f8dc radeonsi: remove unused variables in si_insert_input_ptr
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
2019-01-02 15:01:58 -05:00
Marek Olšák
cba475b3e7 radeonsi: use u_decomposed_prims_for_vertices instead of u_prims_for_vertices
It seems to be the same, but this doesn't use integer division with
a variable divisor.

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
2019-01-02 15:01:56 -05:00
Marek Olšák
54bc87469a radeonsi: make si_cp_wait_mem more configurable
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
2019-01-02 15:01:54 -05:00
Marek Olšák
9d2c3a1fe0 radeonsi: call si_fix_resource_usage for the GS copy shader as well
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
2019-01-02 15:01:53 -05:00
Marek Olšák
d28e208213 radeonsi: don't emit redundant PKT3_NUM_INSTANCES packets
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
2019-01-02 15:01:50 -05:00
Caio Marcelo de Oliveira Filho
7d6babf995 nir: add a way to print the deref chain
Makes debugging easier when we care about the deref chain and not the
deref instruction itself.  To make it take a const pointer, constify
some of the static functions in nir_print.c.

Reviewed-by: Eric Anholt <eric@anholt.net>
2019-01-02 10:09:04 -08:00
Dylan Baker
a2596450ac meson: Error out if building nouveau and using LLVM without rtti
Nouveau requires rtti. Often LLVM is configured without rtti, and code
with and without cannot be linked safely. Lets just error out if nouveau
is requested and llvm is built without rtti.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109202
Fixes: c5a97d658e
       ("meson: fix builds against LLVM built without rtti")
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2019-01-02 09:30:12 -08:00
Alexander von Gluck IV
1b97a72328 egl/haiku: Fix reference to disp vs dpy
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Fixes: 00992700c9 "egl: set the EGLDevice when creating a display"
2019-01-02 13:45:09 +00:00
Iago Toral Quiroga
ec79069856 compiler/spirv: use 32-bit polynomial approximation for 16-bit asin()
The 16-bit polynomial execution doesn't meet Khronos precision requirements.
Also, the half-float denorm range starts at 2^(-14) and with asin taking input
values in the range [0, 1], polynomial approximations can lead to flushing
relatively easy.

An alternative is to use the atan2 formula to compute asin, which is the
reference taken by Khronos to determine precision requirements, but that
ends up generating too many additional instructions when compared to the
polynomial approximation. Specifically, for the Intel case, doing this
adds +41 instructions to the program for each asin/acos call, which looks
like an undesirable trade off.

So for now we take the easy way out and fallback to using the 32-bit
polynomial approximation, which is better (faster) than the 16-bit atan2
implementation and gives us better precision that matches Khronos
requirements.

v2:
 - Fallback to 32-bit using recursion (Jason).

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:39 +01:00
Iago Toral Quiroga
fda3f6d424 compiler/spirv: implement 16-bit frexp
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:35 +01:00
Iago Toral Quiroga
7d3c34197a compiler/spirv: implement 16-bit hyperbolic trigonometric functions
v2:
 - use nir_fadd_imm and nir_fmul_imm helpers (Jason)

v3:
 - since we need to define one for fsub use it for fdiv too (Jason)

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:05 +01:00
Iago Toral Quiroga
88663ba67c compiler/spirv: implement 16-bit exp and log
v2
 - use nir_fmul_imm helper (Jason)

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:05 +01:00
Iago Toral Quiroga
f18554e2ce compiler/spirv: implement 16-bit atan2
v2:
 - fix huge_val for 16-bit, it was mean't to be 2^14 not 10^14.

v3:
 - rebase on top of new bool sized opcodes
 - use nir_b2f helper
 - use nir_fmul_imm helper

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:05 +01:00
Iago Toral Quiroga
1c8de08ec9 compiler/spirv: implement 16-bit atan
v2:
 - use nir_fadd_imm and nir_fmul_imm helpers (Jason)
 - rebased on top of new sized boolean opcodes
 - use nir_b2f helper

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:05 +01:00
Iago Toral Quiroga
df118535ca compiler/spirv: implement 16-bit acos
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:05 +01:00
Iago Toral Quiroga
dbbbe24d76 compiler/spirv: implement 16-bit asin
v2:
  - use nir_fmul_imm and nir_fadd_imm helpers (Jason)

v3:
 - missed one case where we need to replace nir_imm_float
   with nir_imm_floatN_t (Jason)

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:05 +01:00
Iago Toral Quiroga
95b7c29c2c compiler/spirv: handle 16-bit float in radians() and degrees()
v2:
 - use nir_imm_fmul helper (Jason)

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:05 +01:00
Iago Toral Quiroga
aeee683780 compiler/nir: add nir_fadd_imm() and nir_fmul_imm() helpers
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:05 +01:00
Iago Toral Quiroga
5fc9ad1cb0 compiler/nir: add a nir_b2f() helper
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 07:54:05 +01:00
Timothy Arceri
70be9afccb nir: link time opt duplicate varyings
If we are outputting the same value to more than one output
component rewrite the inputs to read from a single component.

This will allow the duplicate varying components to be optimised
away by the existing opts.

shader-db results i965 (SKL):

total instructions in shared programs: 12869230 -> 12860886 (-0.06%)
instructions in affected programs: 322601 -> 314257 (-2.59%)
helped: 3080
HURT: 8

total cycles in shared programs: 317792574 -> 317730593 (-0.02%)
cycles in affected programs: 2584925 -> 2522944 (-2.40%)
helped: 2975
HURT: 477

shader-db results radeonsi (VEGA):

SGPRS: 31576 -> 31664 (0.28 %)
VGPRS: 17484 -> 17064 (-2.40 %)
Spilled SGPRs: 184 -> 167 (-9.24 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 583340 -> 569368 (-2.40 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Max Waves: 6162 -> 6270 (1.75 %)
Wait states: 0 -> 0 (0.00 %)

vkpipeline-db results RADV (VEGA):

Totals from affected shaders:
SGPRS: 14880 -> 15080 (1.34 %)
VGPRS: 10872 -> 10888 (0.15 %)
Spilled SGPRs: 0 -> 0 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 674016 -> 668396 (-0.83 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Max Waves: 2708 -> 2704 (-0.15 %)
Wait states: 0 -> 0 (0.00 %

V2: bunch of tidy ups suggested by Jason

Reviewed-by: Eric Anholt <eric@anholt.net>
2019-01-02 12:19:17 +11:00
Timothy Arceri
d828694b80 nir: rework nir_link_opt_varyings()
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>
2019-01-02 12:19:17 +11:00