diff options
Diffstat (limited to 'gcc/tree-cfgcleanup.c')
| -rw-r--r-- | gcc/tree-cfgcleanup.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/gcc/tree-cfgcleanup.c b/gcc/tree-cfgcleanup.c index 0f8bfc5..7e719c1 100644 --- a/gcc/tree-cfgcleanup.c +++ b/gcc/tree-cfgcleanup.c @@ -523,17 +523,24 @@ cleanup_tree_cfg_1 (void) } -/* Remove unreachable blocks and other miscellaneous clean up work. */ +/* Remove unreachable blocks and other miscellaneous clean up work. + Return true if the flowgraph was modified, false otherwise. */ bool cleanup_tree_cfg (void) { - bool retval; + bool retval, changed; timevar_push (TV_TREE_CLEANUP_CFG); + /* Iterate until there are no more cleanups left to do. If any + iteration changed the flowgraph, set CHANGED to true. */ + changed = false; do - retval = cleanup_tree_cfg_1 (); + { + retval = cleanup_tree_cfg_1 (); + changed |= retval; + } while (retval); compact_blocks (); @@ -544,7 +551,7 @@ cleanup_tree_cfg (void) timevar_pop (TV_TREE_CLEANUP_CFG); - return retval; + return changed; } /* Cleanup cfg and repair loop structures. */ |