Tested with:
mesa-git from now 19-08-2013
kernel 3.11rc5
libdrm-git
xorg-server-git
xf86-video-ati-git
llvm-3.3
runing on up to dater arch linux x64

As you can see on pictures sb,nollvm are the best all seems to be good.
On llvm backend there are several problems including:
-flashing textures on wheel parts
-bad light at night (white sky) and reflections on shyining parts
-black rectangles on back lights on cars
-black circles instead of lights on the front (of car)
-black water no textures,reflections etc.
When we use sb+llvm there is only one problem I mean there is  white sky
completly at night an this genetates strange reflections as you can see on
sb+llvm pictures