[Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82942

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
class pass_insert_vzeroupper : public rtl_opt_pass
{
public:
  pass_insert_vzeroupper(gcc::context *ctxt)
    : rtl_opt_pass(pass_data_insert_vzeroupper, ctxt)
  {}

  /* opt_pass methods: */
  virtual bool gate (function *)
    {
      return TARGET_AVX && !TARGET_AVX512F
             && TARGET_VZEROUPPER && flag_expensive_optimizations
             && !optimize_size;
    }

  virtual unsigned int execute (function *)
    {
      return rest_of_handle_insert_vzeroupper ();
    }

}; // class pass_insert_vzeroupper