intel/compiler: Pass shader_stats for each SIMD mode

Passing shader_stats to the fs_generator constructor means that the
SIMD8 shader stats from the visitor (such as the scheduler mode) will be
reported out for the SIMD16/SIMD32 versions as well.

As you can see, we are now passing 'shader_stats' and 'stats' to
generate_code(), which is obviously odd looking. Ian rebased and
committed an old patch of mine which added the shader_stats struct on
July 30 in commit dabb5d4bee (i965/fs: Add a shader_stats struct.) and
shortly after on August 12 Jason added the brw_compile_stats struct in
commit 134607760a (intel/compiler: Fill a compiler statistics struct).

I'd like to combine the two, but I'm not sure how. shader_stats is an
input to generate_code() while brw_compile_stats is an output and is
only used by the Vulkan driver. Leave it as is for now...

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4093>

src/intel/compiler/brw_fs_generator.cpp

@@ -186,14 +186,12 @@ brw_reg_from_fs_reg(const struct gen_device_info *devinfo, fs_inst *inst,
 fs_generator::fs_generator(const struct brw_compiler *compiler, void *log_data,
                            void *mem_ctx,
                            struct brw_stage_prog_data *prog_data,
-                           struct shader_stats shader_stats,
                            bool runtime_check_aads_emit,
                            gl_shader_stage stage)
 
    : compiler(compiler), log_data(log_data),
      devinfo(compiler->devinfo),
      prog_data(prog_data),
-     shader_stats(shader_stats),
      runtime_check_aads_emit(runtime_check_aads_emit), debug_flag(false),
      stage(stage), mem_ctx(mem_ctx)
 {
@@ -1698,6 +1696,7 @@ fs_generator::enable_debug(const char *shader_name)
 
 int
 fs_generator::generate_code(const cfg_t *cfg, int dispatch_width,
+                            struct shader_stats shader_stats,
                             struct brw_compile_stats *stats)
 {
    /* align to 64 byte boundary. */