[Bug c++/49813] [C++0x] sinh vs asinh vs constexpr

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49813

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|x86_64-linux                |

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-22 
10:38:42 UTC ---
We do have code to constant fold asinh in builtins.c:

static tree
fold_builtin_1 (location_t loc, tree fndecl, tree arg0, bool ignore)
{
...
    CASE_FLT_FN (BUILT_IN_ASINH):
      if (validate_arg (arg0, REAL_TYPE))
        return do_mpfr_arg1 (arg0, type, mpfr_asinh, NULL, NULL, 0);
    break;

It works for C:

#include <math.h>

int main()
{
    const double ds  = sinh(1.0);   // Ok
    const double das = asinh(1.0);  // Doesn't compile.
}

in the .original dump:

;; Function main (null)
;; enabled by -tree-original


{
  const double ds = 1.175201193643801378385660427738912403583526611328125e+0;
  const double das = 8.8137358701954304773806825323845259845256805419921875e-1;

    const double ds = 1.175201193643801378385660427738912403583526611328125e+0;
    const double das =
8.8137358701954304773806825323845259845256805419921875e-1;
}