[Bug bootstrap/86316] New: tree-vect-loop.c possible uninitialized variable

[kargl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86316

            Bug ID: 86316
           Summary: tree-vect-loop.c possible uninitialized variable
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kargl at gcc dot gnu.org
  Target Milestone: ---

This commit

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r262009 | rguenth | 2018-06-25 04:04:01 -0700 (Mon, 25 Jun 2018) | 55 lines

2018-06-25  Richard Biener  <rguenther@suse.de>

breaks bootstrap on x86_64-*-freebsd with this message

../../gcc/gcc/tree-vect-loop.c: In function '_loop_vec_info*
vect_analyze_loop(loop*, loop_vec_info, vec_info_shared*)':
../../gcc/gcc/tree-vect-loop.c:1946:25: error: 'n_stmts' may be used
uninitialized in this function [-Werror=maybe-uninitialized]
   ok = vect_analyze_slp (loop_vinfo, *n_stmts);
        ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc/tree-vect-loop.c:2318:12: note: 'n_stmts' was declared here
   unsigned n_stmts;