diff options
Diffstat (limited to 'gcc/tree-ssa-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index 056b7b512bb..8669cdfa852 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -4,19 +4,19 @@ Contributed by Ben Elliston <bje@redhat.com> and Andrew MacLeod <amacleod@redhat.com> Adapted to use control dependence by Steven Bosscher, SUSE Labs. - + This file is part of GCC. - + GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. - + GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - + You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ @@ -618,7 +618,7 @@ degenerate_phi_p (gimple phi) /* Propagate necessity using the operands of necessary statements. Process the uses on each statement in the worklist, and add all feeding statements which contribute to the calculation of this - value to the worklist. + value to the worklist. In conservative mode, EL is NULL. */ @@ -626,7 +626,7 @@ static void propagate_necessity (struct edge_list *el) { gimple stmt; - bool aggressive = (el ? true : false); + bool aggressive = (el ? true : false); if (dump_file && (dump_flags & TDF_DETAILS)) fprintf (dump_file, "\nProcessing worklist:\n"); @@ -694,7 +694,7 @@ propagate_necessity (struct edge_list *el) else { /* Propagate through the operands. Examine all the USE, VUSE and - VDEF operands in this statement. Mark all the statements + VDEF operands in this statement. Mark all the statements which feed this statement's uses as necessary. */ ssa_op_iter iter; tree use; @@ -1071,8 +1071,8 @@ remove_dead_stmt (gimple_stmt_iterator *i, basic_block bb) } unlink_stmt_vdef (stmt); - gsi_remove (i, true); - release_defs (stmt); + gsi_remove (i, true); + release_defs (stmt); } /* Eliminate unnecessary statements. Any instruction not marked as necessary @@ -1159,7 +1159,7 @@ eliminate_unnecessary_stmts (void) print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM); fprintf (dump_file, "\n"); } - + gimple_call_set_lhs (stmt, NULL_TREE); maybe_clean_or_replace_eh_stmt (stmt, stmt); update_stmt (stmt); @@ -1404,7 +1404,7 @@ perform_tree_ssa_dce (bool aggressive) free_edge_list (el); if (something_changed) - return (TODO_update_ssa | TODO_cleanup_cfg | TODO_ggc_collect + return (TODO_update_ssa | TODO_cleanup_cfg | TODO_ggc_collect | TODO_remove_unused_locals); else return 0; |