[Bug testsuite/86519] [9 Regression] New test case gcc.dg/strcmpopt_6.c fails with its introduction in r262636

[qinzhao at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86519

--- Comment #15 from qinzhao at gcc dot gnu.org ---
Created attachment 44516
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44516&action=edit
proposed patch