http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50789
Andrey Turetskiy <andrey.turetskiy at gmail dot com> changed:
What |Removed |Added
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--- Comment #11 from Andrey Turetskiy <andrey.turetskiy at gmail dot com>
2013-04-17 08:31:29 UTC ---
It looks like gathers can be used for vectorization in cases like:
#define N 1024
float x[4*N], y[N];
void foo ()
{
int i;
for (i = 0; i < N; i++)
y[i] = x[179 + 3*i];
}
Now this code isn't vectorized.
In addition there are a lot of such exampes in SPECS 2006. Vectorization with
gathers can give noticeable gain.
