https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103121
--- Comment #25 from Andrew Macleod <amacleod at redhat dot com> --- OK, lets reset. I run it now, and ranger is indeed being used, so somewhere along the way the conversion was finished I guess. so. looking at the trace, I see: 446 range_of_expr(_2) at stmt grp_name_25 = __builtin_alloca (_2); 447 range_of_stmt (_2) at stmt _2 = _1 + 1; 448 ROS dependence fill ROS dep fill (_2) at stmt _2 = _1 + 1; FALSE : (448) ROS (_2) 449 range_of_expr(_1) at stmt _2 = _1 + 1; 450 range_of_stmt (_1) at stmt _1 = _20->len; TRUE : (450) range_of_stmt (_1) unsigned int VARYING TRUE : (449) range_of_expr (_1) unsigned int VARYING Registering value_relation (_2 != _1) (bb2) at _2 = _1 + 1; TRUE : (447) range_of_stmt (_2) unsigned int VARYING TRUE : (446) range_of_expr (_2) unsigned int VARYING So the call to __builtin_alloca is returning VARYING, as one would expect. The original comment#12 from martin was asking that he was seeing [1,1] instead of VARYING for _4 (which is now _2 in this listing I presume) That query should be returning VARYING now, as expected. I also don't get the warning anymore on trunk. Is there still an issue here?