intel/nir: Use nir_shrink_vec_array_vars
Shader-db results on Kaby Lake: total instructions in shared programs: 15177605 -> 15176765 (<.01%) instructions in affected programs: 4259 -> 3419 (-19.72%) helped: 1 HURT: 0 total spills in shared programs: 10954 -> 10855 (-0.90%) spills in affected programs: 295 -> 196 (-33.56%) helped: 1 HURT: 0 total fills in shared programs: 22222 -> 22117 (-0.47%) fills in affected programs: 417 -> 312 (-25.18%) helped: 1 HURT: 0 The helped shader is from the OglCSDof synmark test. On my Kaby Lake laptop, the actual framerate of the benchmark didn't appear to improve beyond the noise. Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
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@ -542,6 +542,7 @@ brw_nir_optimize(nir_shader *nir, const struct brw_compiler *compiler,
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do {
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progress = false;
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OPT(nir_split_array_vars, nir_var_local);
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OPT(nir_shrink_vec_array_vars, nir_var_local);
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OPT(nir_lower_vars_to_ssa);
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OPT(nir_opt_copy_prop_vars);
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