[Bug tree-optimization/98443] New: Failure to optimize out vector operations into a constant when possible

[gabravier at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98443

            Bug ID: 98443
           Summary: Failure to optimize out vector operations into a
                    constant when possible
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gabravier at gmail dot com
  Target Milestone: ---

typedef char A __attribute__((vector_size(32)));

int foo(A w)
{
    w *= (A){0, 1};
    return w[0];
}

This can be optimized into `return 0;`. This transformation is done by LLVM,
but not by GCC.