diff options
Diffstat (limited to 'gcc/cfghooks.c')
| -rw-r--r-- | gcc/cfghooks.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/gcc/cfghooks.c b/gcc/cfghooks.c index 0f0c230fb80..12ffdc87263 100644 --- a/gcc/cfghooks.c +++ b/gcc/cfghooks.c @@ -320,6 +320,10 @@ edge split_block (basic_block bb, void *i) { basic_block new_bb; + /* APPLE LOCAL begin lno */ + bool irr = (bb->flags & BB_IRREDUCIBLE_LOOP) != 0; + int flags = EDGE_FALLTHRU; + /* APPLE LOCAL end lno */ if (!cfg_hooks->split_block) internal_error ("%s does not support split_block.", cfg_hooks->name); @@ -331,7 +335,14 @@ split_block (basic_block bb, void *i) new_bb->count = bb->count; new_bb->frequency = bb->frequency; new_bb->loop_depth = bb->loop_depth; - + /* APPLE LOCAL begin lno */ + if (irr) + { + new_bb->flags |= BB_IRREDUCIBLE_LOOP; + flags |= EDGE_IRREDUCIBLE_LOOP; + } + /* APPLE LOCAL end lno */ + if (dom_info_available_p (CDI_DOMINATORS)) { redirect_immediate_dominators (CDI_DOMINATORS, bb, new_bb); @@ -451,6 +462,15 @@ split_edge (edge e) } }; + /* APPLE LOCAL begin lno */ + if (irr) + { + ret->flags |= BB_IRREDUCIBLE_LOOP; + EDGE_PRED (ret, 0)->flags |= EDGE_IRREDUCIBLE_LOOP; + EDGE_SUCC (ret, 0)->flags |= EDGE_IRREDUCIBLE_LOOP; + } + /* APPLE LOCAL end lno */ + return ret; } @@ -570,6 +590,8 @@ make_forwarder_block (basic_block bb, bool (*redirect_edge_p) (edge), edge e, fallthru; edge_iterator ei; basic_block dummy, jump; + /* APPLE LOCAL lno */ + bool fst_irr = false; if (!cfg_hooks->make_forwarder_block) internal_error ("%s does not support make_forwarder_block.", @@ -584,6 +606,8 @@ make_forwarder_block (basic_block bb, bool (*redirect_edge_p) (edge), { if (redirect_edge_p (e)) { + /* APPLE LOCAL lno */ + fst_irr |= (e->flags & EDGE_IRREDUCIBLE_LOOP) != 0; ei_next (&ei); continue; } @@ -603,6 +627,14 @@ make_forwarder_block (basic_block bb, bool (*redirect_edge_p) (edge), new_bb_cbk (jump); } + /* APPLE LOCAL begin lno */ + if (!fst_irr) + { + dummy->flags &= ~BB_IRREDUCIBLE_LOOP; + fallthru->flags &= ~EDGE_IRREDUCIBLE_LOOP; + } + /* APPLE LOCAL end lno */ + if (dom_info_available_p (CDI_DOMINATORS)) { basic_block doms_to_fix[2]; |