------- Comment #5 from dominiq at lps dot ens dot fr 2007-03-19 12:43 ------- > There is no option to turn it off. But for !TARGET_C99_FUNCTIONS and > !TARGET_HAS_SINCOS targets it's off.
>From my understanding of the thread http://gcc.gnu.org/ml/gcc/2007-03/msg00639.html if !TARGET_64BIT, then TARGET_C99_FUNCTIONS depends on darwin_macosx_version_min which seems presently default to 10.1. So TARGET_C99_FUNCTIONS seems to be set to 0 at least for a G5 under OSX 10.3 and a G4 under 10.4. > Does darwin have a sincos() library function? I don't know. If there is no answer in this PR, I can ask the question on [EMAIL PROTECTED] >From the behavior reported in PR30969, PR30980, and PR31161, it seems that the optimization is off for gcc, but on for g++ and gfortran, though I cannot figure out why. > If the ABI were not stupid of course ;) Since sin() and cos() are non trivial functions, I am very surprised that a wrong API makes a 50% difference. If the API is so time consuming, why not inline sin() and cos()? In addition a decent optimizer should be able to eliminate redundant part of the codes, making the use of a sincos() function not necessary, or am I too naive? What is the best way to collect data on the different platform to evaluate how this optimization is really working? I have only access to OSX and Intel or AMD64 under Linux. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31249
