Commit graph

131425 commits

Author SHA1 Message Date
Samuel Pitoiset
4ffa6acb0d radv: add RADV_DEBUG=noumr to disable UMR logs during GPU hang detection
Sometimes UMR logs can't be dumped and you would get permission
denied, even if the UMR binary has the setuid bit enabled.

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/7706>
2020-11-23 08:44:52 +01:00
Samuel Pitoiset
a61a398f7e radv: dump application info in the GPU hang report
Like the name, version, as well as the engine and the API version.

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/7706>
2020-11-23 08:44:52 +01:00
Samuel Pitoiset
8d7f78ccf8 radv: append a time string to the hang report dump directory
Using the PID only isn't really informative.

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/7706>
2020-11-23 08:44:52 +01:00
Samuel Pitoiset
15e1b530f6 radv: print more debug messages when generating a hang report
If for some reasons the driver can't generate the hang report properly.

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/7706>
2020-11-23 08:44:52 +01:00
Marek Olšák
f7364c9fe0 radeonsi: don't allocate LDS for TCS inputs if it's not used
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
a4ba51e5be radeonsi: don't insert barrier between VS/TCS if all TCS inputs come from VGPRs
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
61fe66a2e4 radeonsi: pass VS->TCS IO via VGPRs if VS and TCS have the same thread count
It can only be done if a TCS input is accessed without indirect indexing and
with gl_InvocationID as the vertex index, and the number of VS and TCS threads
is the same.

This eliminates LDS stores and loads for VS->TCS IO, reducing shader lifetime
and LDS traffic.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
6f13034265 ac/llvm: prepare for passing VS->TCS IO via VGPRs
- bump AC_MAX_ARGS
- add vertex_index_is_invoc_id parameter into load_tess_varyings

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
98b2aacfbf radeonsi: remove unnecessary NULL checking in NIR tess functions
param_index is always checked for non-NULL later.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
1190808eca radeonsi: if VS and TCS have the same number of threads, merge the conditonals
Instead of:
    if (VS) {
	VS;
    }
    if (TCS) {
	TCS;
    }

Do this if the number of threads is the same in VS and TCS:
    exec = enabled_threads;
    VS;
    TCS;

Skipping declare_vb_descriptor_input_sgprs is needed to match the VS return
values.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
0aba174361 radeonsi: always return void from si_build_wrapper_function
It's the end of the shader, there are no return values.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
a56e92c79e radeonsi: merge TCS and TCS epilog conditional blocks
Instead of:
    if (TCS) {
       TCS;
    }
    if (TCS && epilog) {
       epilog;
    }

Do:
    if (TCS) {
	TCS;
	if (epilog) {
	    epilog;
    }

Only monolithic shaders can do it.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
c605de30eb radeonsi: don't generate a dead conditional in si_write_tess_factors on gfx9+
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
5df5ee2722 radeonsi: limit HS LDS usage per workgroup to 16K to allow at least 2 WGs/CU
This increases occupancy when the LDS size is e.g. 20K for 3 waves.
If we limit the size to 16K, we can fit 2 workgroups with 2 waves each,
so 4 waves in total.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
bdee9dc633 radeonsi: don't allocate LDS for TCS outputs if they are not read
This reduces LDS usage by 50% in Unigine Heaven.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
10beddf659 radeonsi: don't leave more than 8 unoccupied lanes in HS
Previously it was 16 and bigger patches would always trim the patch count
needlessly.

There are 2 variables to consider:
- lane occupancy
- LDS usage (limiting wave occupancy)

If LDS size is 32 KB (max limit per CU) for 3 waves and we can't maximize
occupancy, it's better to leave some lanes unoccupied because using 2
waves would decrease the LDS size to 21 KB, which is not enough to fit
another workgroup on the CU.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:21 +00:00
Marek Olšák
9b5b5cbc53 radeonsi: adjust tess SGPRs to allow fully occupied 3 HS waves of triangles
With triangles and 3 HS waves, 3 lanes were unoccupied. Adjust the SGPR
encoding to allow 1 more triangle to fit there.

Some of the fields are not large enough, but they weren't large enough
before either.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:20 +00:00
Marek Olšák
9659384744 ac/nir: fix a typo in ac_are_tessfactors_def_in_all_invocs
I think it only made the pass return false if there was a barrier

Fixes: 2832bc972b - ac/nir_to_llvm: add ac_are_tessfactors_def_in_all_invocs()

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7623>
2020-11-23 02:22:20 +00:00
Gert Wollny
bb6bdeb230 r600/sfn: Correctly lower all int64
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7724>
2020-11-22 22:55:31 +00:00
Vinson Lee
861d48ea0b nv50/ir: Initialize Program members in constructor.
Fix defects reported by Coverity Scan.

uninit_member: Non-static class member tlsSize is not initialized in this constructor nor in any functions that it calls.
uninit_member: Non-static class member driver is not initialized in this constructor nor in any functions that it calls.
uninit_member: Non-static class member driver_out is not initialized in this constructor nor in any functions that it calls.

Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7703>
2020-11-22 14:24:35 -08:00
Gert Wollny
8976918efa r600/sfn: use a per stream index register in GS
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7714>
2020-11-22 15:38:08 +00:00
Gert Wollny
335c48ab33 r600/sfn: lower bool to int32 only after common optimizations
Fixes: f79b7fcf7c
   r600/sfn: use 32 bit bools

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7714>
2020-11-22 15:38:08 +00:00
Timur Kristóf
5b77b14448 nir: Use src_is_invocation_id in get_deref_info.
Signed-off-by: Timur Kristof <timur.kristof@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7622>
2020-11-21 19:38:57 -05:00
Marek Olšák
e78c089aae nir: fix gathering patch IO usage with lowered IO
Fixes: 17af07024d - nir: gather all IO info from IO intrinsics

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7622>
2020-11-21 19:38:55 -05:00
Marek Olšák
aadfdb962f nir: fix gathering TCS cross invocation access with lowered IO
Fixes: abe9588ff0 - nir: gather tess.tcs_cross_invocation info from lowered IO intrinsics

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7622>
2020-11-21 19:38:53 -05:00
Marek Olšák
9edfbd6296 mesa: lock Shared->TexMutex only once for a glthread batch
This removes a lot of locking from the driver thread.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7053>
2020-11-21 21:02:56 +00:00
Marek Olšák
8e7270de55 mesa: lock Shared->BufferObjects only once for a glthread batch
This removes a lot of locking from the driver thread.

If multiple contexts sharing buffers submit GL calls from multiple threads,
they will be serialized by this mutex. I can add a driconf option to turn
off this optimization if needed, but I currently don't anticipate to see
GL apps that use multiple shared contexts in different threads
simultaneously.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7053>
2020-11-21 21:02:56 +00:00
Marek Olšák
b8684672ff glthread: make glGetActiveUniform return without syncing
We just need to track glLinkProgram and glDeleteProgram.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7053>
2020-11-21 21:02:56 +00:00
Marek Olšák
5f820b38d4 mesa: make error handling for glGetActiveUniform glthread-safe
glGetActiveUniform will be called from the app thread directly.
This is safe if a few conditions are met.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7053>
2020-11-21 21:02:56 +00:00
Marek Olšák
ac4dc6e139 mesa: add glInternalSetError for glthread
glthread wants to set GL errors, but has to do it by adding the SetError
call into the queue for it to be thread-safe.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7053>
2020-11-21 21:02:56 +00:00
Bas Nieuwenhuizen
347a3d68cd radv: Dump BO VA ranges on hang.
To make it easier to figure out if a given VA is valid or not.

Gitlab: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3620
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7205>
2020-11-21 14:25:53 +00:00
Vinson Lee
ba9906fc8f clover: Initialize command_queue member _props.
Fix defect reported by Coverity Scan.

Uninitialized scalar variable (UNINIT)
uninit_use: Using uninitialized value this->_props.
    _props |= properties[i + 1];

Fixes: e42a7fa037 ("clover: add support command queue properties")
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7701>
2020-11-20 17:55:27 -08:00
Eric Engestrom
f8dc22bf61 meson: drop deprecated EGL platform build options
These two options were deprecated and announced to be removed in 20.3,
so let's drop them now.

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Acked-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Cc: 20.3 <mesa-stable>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5844>
2020-11-20 21:35:23 +00:00
Eric Engestrom
4da8323a14 gitlab-ci: drop deprecated platforms that snuck in when nobody was watching
... even though I did review that commit. My bad :]

Fixes: c56f09124b ("gitlab-ci: Move classic driver testing to a new meson-classic job")
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5844>
2020-11-20 21:35:23 +00:00
Rhys Perry
14186a1b84 aco/tests: add Builder::v_mul_imm() tests
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5390>
2020-11-20 19:50:32 +00:00
Rhys Perry
aab507c6b0 aco: use v_mul_imm() for some nir_op_imul
Some of the optimizations v_mul_imm() does are complex and very
target-specific and not suitable to do in ACO's optimizer.

fossil-db (Vega):
Totals from 49135 (35.76% of 137413) affected shaders:
SGPRs: 2698547 -> 2696103 (-0.09%); split: -0.16%, +0.07%
VGPRs: 2301412 -> 2301600 (+0.01%); split: -0.01%, +0.02%
SpillSGPRs: 51520 -> 51519 (-0.00%)
CodeSize: 168798572 -> 169164012 (+0.22%); split: -0.00%, +0.22%
MaxWaves: 306553 -> 306539 (-0.00%); split: +0.00%, -0.01%
Instrs: 33423982 -> 33506598 (+0.25%); split: -0.00%, +0.25%
Cycles: 1807800632 -> 1804101376 (-0.20%); split: -0.20%, +0.00%

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5390>
2020-11-20 19:50:32 +00:00
Rhys Perry
02c5519e6c aco: try harder to not create v_mul_lo_u32
fossil-db (Vega):
Totals from 4 (0.00% of 137413) affected shaders:
CodeSize: 13708 -> 13716 (+0.06%)
Instrs: 2742 -> 2744 (+0.07%)
Cycles: 24348 -> 24236 (-0.46%)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5390>
2020-11-20 19:50:31 +00:00
Rhys Perry
8ca23bcf39 aco: copy constant to sgpr in Builder::v_mul_imm()
No fossil-db changes.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5390>
2020-11-20 19:50:31 +00:00
Rhys Perry
756bb29391 aco: create vgpr constant copies using v_bfrev_b32
Looks like this worked once but broke at some point.

fossil-db (Vega):
Totals from 577 (0.42% of 137413) affected shaders:
CodeSize: 3822052 -> 3818720 (-0.09%)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5390>
2020-11-20 19:50:31 +00:00
Rhys Perry
4d93fc25f0 aco: count v_mul_lo_u32 as 16 cycles
There are more, but this is a common one.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5390>
2020-11-20 19:50:31 +00:00
Rhys Perry
70d665d981 aco: don't create v_mov_b32 in v_mul_imm()
We switched to p_parallelcopy for everything else.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5390>
2020-11-20 19:50:31 +00:00
Krunal Patel
35613c752f radeon/vce: Bitrate not updated when changing framerate
Issue: Encoding parameters not updated after changing FrameRate

Root Cause:
In rvce_begin_frame, need_rate_control was enabled if the target_bitrate,
quant_i_frames, quant_p_frames, quant_b_frames or rate_ctrl_method
changes. Due to this the rate_control() was not updating the encoder
parameters with new framerate, peak_bits_per_picture_integer and
avg_target_bits_per_picture

Fix:
Added the condition where we will check if there is a change in
other parameters and enable need_rate_control. Eventually updating the
encoder parameters with new framerate and bitrate.

Signed-off-by: Krunal Patel <krunalkumarmukeshkumar.patel@amd.corp-partner.google.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7696>
2020-11-20 23:35:01 +05:30
Adam Jackson
a59b1b18a9 glx, egl: Add LIBGL_DRI2_DISABLE environment variable
For orthogonality with LIBGL_DRI3_DISABLE.

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7688>
2020-11-20 16:15:57 +00:00
Bas Nieuwenhuizen
27612984a4 gallium/vl: Set modifier field for winsys handle.
Fixes: c786150d ("radeonsi: Add modifier support")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3821
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7700>
2020-11-20 15:21:56 +00:00
Rhys Perry
8c3abcab6d nir/copy_prop_vars: avoid a duplicate lookup if src == vec_src
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7511>
2020-11-20 13:57:34 +00:00
Rhys Perry
33eeb994be nir/copy_prop_vars: use nir_deref_and_path
Instead of recreating paths, create them once when needed using
nir_deref_and_path.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7511>
2020-11-20 13:57:34 +00:00
Rhys Perry
abc3225927 nir/deref: add helpers to lazily create paths
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7511>
2020-11-20 13:57:34 +00:00
Rhys Perry
7d8c06d484 nir/search: check for changes before adding uses to worklist
So it doesn't uselessly add instructions to the worklist.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7511>
2020-11-20 13:57:34 +00:00
Rhys Perry
556a20afe6 nir/search: check instr type before adding to worklist
nir_algebraic_instr() ignores non-ALU instructions, so there's no point.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7511>
2020-11-20 13:57:34 +00:00
Rhys Perry
4832262560 nir/loop_analyze: initialize loop variables on demand
Zero'ing the allocation and calling initialize_ssa_def() for every
ssa def can be expensive. Since we only use a subset of the allocated
variables, initialize it only when needed.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7511>
2020-11-20 13:57:34 +00:00