i965/fs: Add a shader_stats struct.

It'll grow further, and we'd like to avoid adding an additional
parameter to fs_generator() for each new piece of data.

v2 (idr): Rebase on 17 months.  Track a visitor instead of a cfg.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>

src/intel/compiler/brw_shader.cpp

@@ -1335,7 +1335,7 @@ brw_compile_tes(const struct brw_compiler *compiler,
       prog_data->base.dispatch_mode = DISPATCH_MODE_SIMD8;
 
       fs_generator g(compiler, log_data, mem_ctx,
-                     &prog_data->base.base, v.promoted_constants, false,
+                     &prog_data->base.base, v.shader_stats, false,
                      MESA_SHADER_TESS_EVAL);
       if (unlikely(INTEL_DEBUG & DEBUG_TES)) {
          g.enable_debug(ralloc_asprintf(mem_ctx,