https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95960
Bug ID: 95960
Summary: GCC should re-vectorize vector code with larger VF
Product: gcc
Version: 11.0
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: ---
For the following simple case GCC should vectorize it using AVX:
typedef double __attribute__((vector_size(16))) v2df;
double a[4];
double b[4];
void f()
{
*(v2df *)&b[0] += *(v2df *)&a[0];
*(v2df *)&b[2] += *(v2df *)&a[2];
}
Similar opportunities may exist for loops where also Neon -> SVE transforms
may be profitable. Starting with BB vectorization might be easier since
you only need to consider SLP.
