------- Comment #3 from rguenth at gcc dot gnu dot org 2007-11-29 17:21 ------- The recommended (and optimized) way to do this is:
union {
INT64 i;
double d;
} x;
x.d = arg;
return x.i;
you can also make your way work optimized by specifying -fno-strict-aliasing.
That it works without optimization is because with that or with -O1
-fno-strict-aliasing is default.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34295
