[Bug c/35523] Wrong result for constant float expression

[rguenth at gcc dot gnu dot org]

------- Comment #8 from rguenth at gcc dot gnu dot org  2008-03-10 16:59 -------
Are you sure your calculator isn't wrong? ;)  Gcc 4.2 produces the same result
for me (and only gcc 4.3 constant folds the result).

Of course this might be a glibc issue as indeed the 32bit version produces

./t
sin(cos(tan(PI/2))) = -0.827351

huhm.  For just tan(PI/2) I get

16331778728383844.000000  (32bit)
16331239353195370.000000  (64bit)

which is different enough to make a subsequent (range-reduced) sin or cos
different.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35523