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[Bug middle-end/28367] accessing via union on a vector does not cause vec_extract to be used
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Jul 2006 05:37:14 -0000
- Subject: [Bug middle-end/28367] accessing via union on a vector does not cause vec_extract to be used
- References: <bug-28367-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from pinskia at gcc dot gnu dot org 2006-07-13 05:37 -------
Note a related testcase is:
#define vector __attribute__((vector_size(16)))
float f(vector float t)
{
return *(float*)(&t);
}
Which is only mentioned here in get_alias_set in the GCC sources as being not
violating aliasing rules (see also
http://gcc.gnu.org/ml/gcc/2006-07/msg00250.html).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28367