I thought I had once seen a post about these, but a search does not find anything, so I am going to ask about them:

C:\Users\Darrell\AppData\Local\Temp\\OCL5992T3.cl:183:72: warning: unknown attribute 'max_constant_size' ignored
__constant real* _ap_consts __attribute__((max_constant_size(18 * sizeof(real)))),
^
C:\Users\Darrell\AppData\Local\Temp\\OCL5992T3.cl:185:62: warning: unknown attribute 'max_constant_size' ignored
__constant SC* sc __attribute__((max_constant_size(NSTREAM * sizeof(SC)))),
^
C:\Users\Darrell\AppData\Local\Temp\\OCL5992T3.cl:186:67: warning: unknown attribute 'max_constant_size' ignored
__constant real* sg_dx __attribute__((max_constant_size(256 * sizeof(real)))),
^
3 warnings generated.

Estimated AMD GPU GFLOP/s: 465 SP GFLOP/s, 93 DP FLOP/s
Warning: Bizarrely low flops (93). Defaulting to 100

Any ideas?