intel/fs: report max register pressure in shader stats

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21756>

src/intel/compiler/brw_fs_generator.cpp

@@ -2537,6 +2537,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width,
       stats->cycles = perf.latency;
       stats->spills = shader_stats.spill_count;
       stats->fills = shader_stats.fill_count;
+      stats->max_live_registers = shader_stats.max_register_pressure;
    }
 
    return start_offset;