[Bug rtl-optimization/59311] [4.9 Regression] LRA fails to update REG_CFA_SET_VDRAP note

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59311

--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
          /* Terminate the search in check_eliminable_occurrences at
             this point.  */
          *recog_data.operand_loc[i] = 0; 

sets DEST to NULL.