[Bug tree-optimization/95845] New: Failure to optimize vector load made in separate operations to single load

[gabravier at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95845

            Bug ID: 95845
           Summary: Failure to optimize vector load made in separate
                    operations to single load
           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 float __attribute__((vector_size(8))) v2f32;

v2f32 f(const float *ptr)
{
    v2f32 r;
    r[0] = ptr[0];
    r[1] = ptr[1];
    return r;
}

This can be optimized to `return (v2f32){ptr[0], ptr[1]};`. This transformation
is done by LLVM, but not by GCC.