[Bug middle-end/117379] New: Failure to vectorize multi add + mulit sub

[lin1.hu at intel dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117379

            Bug ID: 117379
           Summary: Failure to vectorize multi add + mulit sub
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: lin1.hu at intel dot com
  Target Milestone: ---

I found GCC can't optimize

typedef unsigned long long u64;

u64 mobility(u64 * a, u64 * b) {

    u64 mobility = 0;
    mobility += a[0];
    mobility += a[1];
    mobility += a[2];
    mobility += a[3];

    mobility -= b[0];
    mobility -= b[1];
    mobility -= b[2];
    mobility -= b[3];

    return mobility;
}

but llvm can
https://godbolt.org/z/srWxxKhM9.

The failure reason is "missed:  not vectorized: no grouped stores in basic
block."

Any chance of gcc implementing vectorization like llvm?