radv: optimize sample mask comparisons

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32327>

src/amd/common/ac_shader_util.c

@@ -95,6 +95,7 @@ void ac_set_nir_options(struct radeon_info *info, bool use_llvm,
    options->support_16bit_alu = info->gfx_level >= GFX8;
    options->vectorize_vec2_16bit = info->has_packed_math_16bit;
    options->discard_is_demote = true;
+   options->optimize_sample_mask_in = true;
    options->io_options = nir_io_has_flexible_input_interpolation_except_flat |
                          (info->gfx_level >= GFX8 ? nir_io_16bit_input_output_support : 0) |
                          nir_io_prefer_scalar_fs_inputs |

src/gallium/drivers/radeonsi/si_get.c

@@ -1561,7 +1561,6 @@ void si_init_screen_get_functions(struct si_screen *sscreen)
    options->fuse_ffma64 = true;
    options->lower_uniforms_to_ubo = true;
    options->lower_layer_fs_input_to_sysval = true;
-   options->optimize_sample_mask_in = true;
    options->lower_to_scalar = true;
    options->lower_to_scalar_filter =
       sscreen->info.has_packed_math_16bit ? si_alu_to_scalar_packed_math_filter : NULL;