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charset=utf-8 Content-Disposition: inline Hi All, This has loop versioning use the vectorizer's IV exit edge when it's available since single_exit (..) fails with multiple exits. Bootstrapped Regtested on aarch64-none-linux-gnu and no issues. Ok for master? Thanks, Tamar gcc/ChangeLog: * tree-vect-loop-manip.cc (vect_loop_versioning): Support multiple exits. --- inline copy of patch -- diff --git a/gcc/tree-vect-loop-manip.cc b/gcc/tree-vect-loop-manip.cc index 3d59119787d6afdc5a6465a547d1ea2d3d940373..58b4b9c11d8b844ee86156cdfcba7f838030a7c2 100644 --- a/gcc/tree-vect-loop-manip.cc +++ b/gcc/tree-vect-loop-manip.cc @@ -4180,12 +4180,24 @@ vect_loop_versioning (loop_vec_info loop_vinfo, If loop versioning wasn't done from loop, but scalar_loop instead, merge_bb will have already just a single successor. */ - merge_bb = single_exit (loop_to_version)->dest; + /* Due to the single_exit check above we should only get here when + loop == loop_to_version, that means we can use loop_vinfo to get the + exits. */ + edge exit_edge = single_exit (loop_to_version); + if (LOOP_VINFO_EARLY_BREAKS (loop_vinfo)) + { + /* In early exits the main exit will fail into the merge block of the + alternative exits. So we need the single successor of the main + exit here to find the merge block. */ + exit_edge = LOOP_VINFO_IV_EXIT (loop_vinfo); + } + gcc_assert (exit_edge); + merge_bb = exit_edge->dest; if (EDGE_COUNT (merge_bb->preds) >= 2) { gcc_assert (EDGE_COUNT (merge_bb->preds) >= 2); - new_exit_bb = split_edge (single_exit (loop_to_version)); - new_exit_e = single_exit (loop_to_version); + new_exit_bb = split_edge (exit_edge); + new_exit_e = exit_edge; e = EDGE_SUCC (new_exit_bb, 0); for (gsi = gsi_start_phis (merge_bb); !gsi_end_p (gsi); -- --j1jvi3rYXaxWfdxr Content-Type: text/plain; charset=utf-8 Content-Disposition: attachment; filename="rb17966.patch" diff --git a/gcc/tree-vect-loop-manip.cc b/gcc/tree-vect-loop-manip.cc index 3d59119787d6afdc5a6465a547d1ea2d3d940373..58b4b9c11d8b844ee86156cdfcba7f838030a7c2 100644 --- a/gcc/tree-vect-loop-manip.cc +++ b/gcc/tree-vect-loop-manip.cc @@ -4180,12 +4180,24 @@ vect_loop_versioning (loop_vec_info loop_vinfo, If loop versioning wasn't done from loop, but scalar_loop instead, merge_bb will have already just a single successor. */ - merge_bb = single_exit (loop_to_version)->dest; + /* Due to the single_exit check above we should only get here when + loop == loop_to_version, that means we can use loop_vinfo to get the + exits. */ + edge exit_edge = single_exit (loop_to_version); + if (LOOP_VINFO_EARLY_BREAKS (loop_vinfo)) + { + /* In early exits the main exit will fail into the merge block of the + alternative exits. So we need the single successor of the main + exit here to find the merge block. */ + exit_edge = LOOP_VINFO_IV_EXIT (loop_vinfo); + } + gcc_assert (exit_edge); + merge_bb = exit_edge->dest; if (EDGE_COUNT (merge_bb->preds) >= 2) { gcc_assert (EDGE_COUNT (merge_bb->preds) >= 2); - new_exit_bb = split_edge (single_exit (loop_to_version)); - new_exit_e = single_exit (loop_to_version); + new_exit_bb = split_edge (exit_edge); + new_exit_e = exit_edge; e = EDGE_SUCC (new_exit_bb, 0); for (gsi = gsi_start_phis (merge_bb); !gsi_end_p (gsi); --j1jvi3rYXaxWfdxr--