https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111791
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Vineet Gupta from comment #5) > (In reply to Robin Dapp from comment #4) > > > Analyzing loop at pr111791.c:8 > > pr111791.c:8:25: note: === analyze_loop_nest === > > pr111791.c:8:25: note: === vect_analyze_loop_form === > > pr111791.c:8:25: note: === get_loop_niters === > > Matching expression match.pd:1919, generic-match-8.cc:27 > > Applying pattern match.pd:1975, generic-match-2.cc:4670 > > Matching expression match.pd:2707, generic-match-4.cc:36 > > Matching expression match.pd:2710, generic-match-3.cc:53 > > Matching expression match.pd:2717, generic-match-2.cc:23 > > Matching expression match.pd:2707, generic-match-4.cc:36 > > Matching expression match.pd:2710, generic-match-3.cc:53 > > Matching expression match.pd:2717, generic-match-2.cc:23 > > Matching expression match.pd:2707, generic-match-4.cc:36 > > Matching expression match.pd:2710, generic-match-3.cc:53 > > Matching expression match.pd:2717, generic-match-2.cc:23 > > Matching expression match.pd:148, generic-match-10.cc:27 > > Matching expression match.pd:148, generic-match-10.cc:27 > > Applying pattern match.pd:4519, generic-match-4.cc:2923 > > Applying pattern match.pd:201, generic-match-4.cc:3103 > > Applying pattern match.pd:3393, generic-match-2.cc:182 > > pr111791.c:8:25: note: Symbolic number of iterations is (unsigned intD.4) > > __builtin_popcountlD.1952 (value_4(D)) > > Curious, how did you get this debug output - is this just one of > -fdump-tree-? The `applying pattern`/`matching expression` comes from `-folding` option of `-fdump-tree-`. It is enabled with `-all` at the end too. So in this case it looks like it was: `-fdump-tree-vect-all` since both __builtin_popcount and the type `unsigned int` has the decl ID at the end (that is what `D.4` and `D.1952` are).
