------- Additional Comments From ebotcazou at gcc dot gnu dot org 2005-03-30
10:53 -------
Hum... type-punning simply doesn't work in this case with the C++ compiler, but
does work with the C compiler. The problem is that:
union u {
x_uint64_t first;
x_uint32_t second;
};
union u conv;
conv.first = arg1;
result = conv.second;
is translated into:
*(&conv.first) = *(&arg1);
*(&result) = *(&conv.second);
and type-punning cannot work in this case (that's the counter-example provided
in the manual). I guess the problem comes the fields being of aggregate types.
Mark, is that fixable or should we document the limitation?
--
What |Removed |Added
----------------------------------------------------------------------------
CC|ebotcazou at gcc dot gnu dot|mark at codesourcery dot com
|org |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20607
