[Bug middle-end/91526] Unnecessary SSE and other instructions generated when compiling in C mode (vs. C++ mode)

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91526

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |middle-end
           Severity|normal                      |enhancement

--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
here is an example where the C++ front-end produces IR which causes the
opposite effect and the C front-end is better:
struct Vec { float v[8]; };

struct Vec multiply(const struct Vec* v1, const struct Vec* v2)
{
    struct Vec result;
    struct Vec result1, result2;
    for(unsigned i = 0; i < 8; ++i)
        result.v[i] = v1->v[i] * v2->v[i];
    result1 = result;
    result2 = result;
    return result2;
}