https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107259
Bug ID: 107259
Summary: Vectorize VxHF _Float16 modes using partial vectors
without -mavx512vl
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
Target Milestone: ---
The following testcase:
--cut here--
#define N 16
_Float16 r[N], a[N], b[N];
void foo (void)
{
for (int i = 0; i < N; i++)
r[i] = a[i] + b[i];
}
--cut here--
can be vectorized with -O2 -mavx512fp16 -mavx512vl, but not when -mavx512vl is
omitted. However, the test can still be vectorized using partial vectors.
The testcase should be vectorized for all N < 32, even without -mavx512vl.
