diff options
Diffstat (limited to 'gcc/tree-optimize.c')
-rw-r--r-- | gcc/tree-optimize.c | 56 |
1 files changed, 51 insertions, 5 deletions
diff --git a/gcc/tree-optimize.c b/gcc/tree-optimize.c index 3f4471a468c..50dd22b451f 100644 --- a/gcc/tree-optimize.c +++ b/gcc/tree-optimize.c @@ -237,9 +237,26 @@ struct tree_opt_pass pass_free_cfg_annotations = 0, /* todo_flags_finish */ 0 /* letter */ }; -/* Pass: fixup_cfg - IPA passes or compilation of earlier functions might've - changed some properties - such as marked functions nothrow. Remove now - redundant edges and basic blocks. */ + +/* Return true if BB has at least one abnormal outgoing edge. */ + +static inline bool +has_abnormal_outgoing_edge_p (basic_block bb) +{ + edge e; + edge_iterator ei; + + FOR_EACH_EDGE (e, ei, bb->succs) + if (e->flags & EDGE_ABNORMAL) + return true; + + return false; +} + +/* Pass: fixup_cfg. IPA passes, compilation of earlier functions or inlining + might have changed some properties, such as marked functions nothrow or + added calls that can potentially go to non-local labels. Remove redundant + edges and basic blocks, and create new ones if necessary. */ static unsigned int execute_fixup_cfg (void) @@ -262,8 +279,37 @@ execute_fixup_cfg (void) } tree_purge_dead_eh_edges (bb); } - + + if (current_function_has_nonlocal_label) + FOR_EACH_BB (bb) + { + for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi)) + { + tree stmt = bsi_stmt (bsi); + if (tree_can_make_abnormal_goto (stmt)) + { + if (stmt == bsi_stmt (bsi_last (bb))) + { + if (!has_abnormal_outgoing_edge_p (bb)) + make_abnormal_goto_edges (bb, true); + } + else + { + edge e = split_block (bb, stmt); + bb = e->src; + make_abnormal_goto_edges (bb, true); + } + break; + } + } + } + cleanup_tree_cfg (); + + /* Dump a textual representation of the flowgraph. */ + if (dump_file) + dump_tree_cfg (dump_file, dump_flags); + return 0; } @@ -280,7 +326,7 @@ struct tree_opt_pass pass_fixup_cfg = 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ - TODO_dump_func, /* todo_flags_finish */ + 0, /* todo_flags_finish */ 0 /* letter */ }; |