https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111879
Bug ID: 111879
Summary: No gather BB vectorization for
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
void __attribute__((noipa))
f (int *restrict y, int *restrict x, int *restrict indices)
{
int i = 0;
y[i * 2] = x[indices[i * 2]] + 1;
y[i * 2 + 1] = x[indices[i * 2 + 1]] + 2;
i++;
y[i * 2] = x[indices[i * 2]] + 1;
y[i * 2 + 1] = x[indices[i * 2 + 1]] + 2;
i++;
y[i * 2] = x[indices[i * 2]] + 1;
y[i * 2 + 1] = x[indices[i * 2 + 1]] + 2;
i++;
y[i * 2] = x[indices[i * 2]] + 1;
y[i * 2 + 1] = x[indices[i * 2 + 1]] + 2;
}
doesn't see the gather operation vectorized (extracted from the loop in
gcc.dg/vect/vect-gather-1.c). Instead we only see the adds and the stores
vectorized.
