http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49352
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED CC| |irar at gcc dot gnu.org AssignedTo|unassigned at gcc dot |jakub at gcc dot gnu.org |gnu.org | --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-06-10 10:28:28 UTC --- The following fixes the -fcompare-debug failure: --- gcc/tree-vect-loop.c.jj 2011-05-31 08:03:10.000000000 +0200 +++ gcc/tree-vect-loop.c 2011-06-10 12:04:28.000000000 +0200 @@ -1719,10 +1719,11 @@ vect_is_slp_reduction (loop_vec_info loo nuses = 0; FOR_EACH_IMM_USE_FAST (use_p, imm_iter, lhs) { + if (is_gimple_debug (USE_STMT (use_p))) + continue; + use_stmt = USE_STMT (use_p); nuses++; - if (is_gimple_debug (use_stmt)) - continue; /* Check if we got back to the reduction phi. */ if (gimple_code (use_stmt) == GIMPLE_PHI but the code still looks questionable to me. It is using use_stmt after the loop, but what does use_stmt contain? The last use, which can be outside of the loop, rather than the single loop use. So, if nuses > 1, which use_stmt you actually want?