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st/mesa: Optionally call nir_vectorize_tess_levels()

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This lets us vectorize gl_TessLevel{Inner,Outer} writes, using a pass
developed for RADV.  Not all backends are prepared to handle this, so
we make it optional.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17944>
This commit is contained in:
Kenneth Graunke 2022-08-03 20:37:20 -07:00
parent be21d54aca
commit c9d399604e
2 changed files with 6 additions and 0 deletions
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1
src/compiler/nir/nir.h
View file

@ -3495,6 +3495,7 @@ typedef struct nir_shader_compiler_options {
* for IO purposes and would prefer loads/stores be vectorized.
*/
bool vectorize_io;
bool vectorize_tess_levels;
bool lower_to_scalar;
nir_instr_filter_cb lower_to_scalar_filter;

5
src/mesa/state_tracker/st_glsl_to_nir.cpp
View file

@ -598,6 +598,11 @@ st_nir_vectorize_io(nir_shader *producer, nir_shader *consumer)
return;
NIR_PASS_V(producer, nir_lower_io_to_vector, nir_var_shader_out);
if (producer->info.stage == MESA_SHADER_TESS_CTRL &&
producer->options->vectorize_tess_levels)
NIR_PASS_V(producer, nir_vectorize_tess_levels);
NIR_PASS_V(producer, nir_opt_combine_stores, nir_var_shader_out);
if ((producer)->info.stage != MESA_SHADER_TESS_CTRL) {