https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81744
--- Comment #6 from amker at gcc dot gnu.org --- (In reply to Jakub Jelinek from comment #5) > (In reply to amker from comment #4) > > So with below code in prepare_finalizers_chain: > > tree fini, niters = number_of_latch_executions (loop); > > //... > > niters = copy_node (niters); > > niters = force_gimple_operand (niters, &stmts, true, NULL); > > > > Even with copy_node, the old niters (which is loop->nb_iterations is changed > > by the call to force_gimple_operand. The code expects every time function > > prepare_finalizers_chain is callsed, the niters/loop->nb_iterations stays in > > the same. What should I do that? Thanks. > > copy_node copies only one level. force_gimple_operand, like other > entrypoints to the gimplifier, are destructive on the tree you pass in, so > if you want to reuse niters after it, you should use niters = unshare_expr > (niters). Yes, I will send a patch. Thanks.
