[Bug target/69299] [6 Regression] -mavx performance degradation with r232088

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69299

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
The related LRA code is

                   case CT_MEMORY:
                      if (MEM_P (op)
                          && satisfies_memory_constraint_p (op, cn))
                        win = true;
                      else if (spilled_pseudo_p (op))
                        win = true;

                      /* If we didn't already win, we can reload constants
                         via force_const_mem or put the pseudo value into
                         memory, or make other memory by reloading the
                         address like for 'o'.  */
                      if (CONST_POOL_OK_P (mode, op)
                          || MEM_P (op) || REG_P (op))
                        badop = false;

             /* If this operand accepts a register, and if the
                 register class has at least one allocatable register,
                 then this operand can be reloaded.  */
              if (winreg && !no_regs_p)
                badop = false;