[LLVMdev] sincos functions

[Suresh Purini]

Hello,

  I was trying to compare the performance of icc, gcc and llvm on the
program almabench.c in Coyote Benchmark suite. Here is a line of code
from the program.


 da   = da + (ca[np][k] * cos(arga) + sa[np][k] * sin(arga)) * 0.0000001;

gcc and icc are performing way better than llvm as they are using
'sincos' library function to compute the sin and the cos of the
argument in a single shot. However llvm is computing sin and cos
seperately.

Is there any compiler option which can enable the code generator to
use 'sincos' function against 'sin' and 'cos' functions seperately.

-Suresh