------- Comment #6 from irar at il dot ibm dot com 2007-06-28 11:41 -------
((float*) (&((sbuf_header_t *) ((buf) == &(buf)->buf[0]))->buf[0]))[i] = val;
is (after ommiting the casts)
*(1B + (i * 4)) = val;
Is that legal?
Vectorizer assumes that every data-ref has base_address. In the above case we
get the following data-ref structure:
base_address: 0B
offset from base address: 0
constant offset from base address: 1
step: 4
aligned to: 128
base_object: *0B
symbol tag: SMT.5
therefore, creating an empty stmt for the first access of the data-ref in the
loop.
Before Zdenek's rewrite of data-refs analysis, it failed to create a dr here,
and thus no segfault occurred.
Ira
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32230
