Compiled test.osl -> test.oso
$tmp1 is forced llvm bool.
$tmp3 is forced llvm bool.
get attribute succeeded with SHADING INDEX 0
SHADING INDEX is even
get attribute succeeded with SHADING INDEX 1
SHADING INDEX is odd
get attribute succeeded with SHADING INDEX 2
SHADING INDEX is even
get attribute succeeded with SHADING INDEX 3
SHADING INDEX is odd

