https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69833

            Bug ID: 69833
           Summary: Warning during bootstrap of
                    --with-build-config=bootstrap-asan
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

Hello.

It's probably false positive warning caused by load/store motion:

$ ../configure --with-build-config=bootstrap-asan

../../gcc/tree-vect-patterns.c: In function ‘gimple*
vect_recog_mask_conversion_pattern(vec<gimple*>*, tree_node**, tree_node**)’:
../../gcc/tree-vect-patterns.c:3582:34: error: ‘lhs’ may be used uninitialized
in this function [-Werror=maybe-uninitialized]
    lhs = vect_recog_temp_ssa_var (TREE_TYPE (lhs), NULL);
          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Preparing a simple fix.

Martin

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