On Tue, Jul 4, 2023 at 10:51 AM Hao Liu OS via Gcc-patches <gcc-patches@gcc.gnu.org> wrote: > > slp_done_for_suggested_uf is used in vect_analyze_loop_2 without > initialization, which is undefined behavior. Initialize it to false > according to the discussion.
OK > gcc/ChangeLog: > PR tree-optimization/110531 > * tree-vect-loop.cc (vect_analyze_loop_1): initialize > slp_done_for_suggested_uf to false. > --- > gcc/tree-vect-loop.cc | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc > index f39a1ecb306..e504645f1df 100644 > --- a/gcc/tree-vect-loop.cc > +++ b/gcc/tree-vect-loop.cc > @@ -3333,7 +3333,7 @@ vect_analyze_loop_1 (class loop *loop, vec_info_shared > *shared, > machine_mode vector_mode = vector_modes[mode_i]; > loop_vinfo->vector_mode = vector_mode; > unsigned int suggested_unroll_factor = 1; > - bool slp_done_for_suggested_uf; > + bool slp_done_for_suggested_uf = false; > > /* Run the main analysis. */ > opt_result res = vect_analyze_loop_2 (loop_vinfo, fatal, > -- > 2.34.1
