PR tree-optimization/16632

[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-ccp.c

diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c
index d3ad956..3e8fa7b 100644 (file)
--- a/gcc/tree-ssa-ccp.c
+++ b/gcc/tree-ssa-ccp.c
@@ -2143,6 +2143,7 @@ convert_to_gimple_builtin (block_stmt_iterator *si_p, tree expr)
 static void
 execute_fold_all_builtins (void)
 {
+  bool cfg_changed = false;
   basic_block bb;
   FOR_EACH_BB (bb)
     {
@@ -2187,6 +2188,9 @@ execute_fold_all_builtins (void)
                abort ();
            }
          modify_stmt (*stmtp);
+         if (maybe_clean_eh_stmt (*stmtp)
+             && tree_purge_dead_eh_edges (bb))
+           cfg_changed = true;
 
          if (dump_file && (dump_flags & TDF_DETAILS))
            {
@@ -2196,6 +2200,10 @@ execute_fold_all_builtins (void)
            }
        }
     }
+
+  /* Delete unreachable blocks.  */
+  if (cfg_changed)
+    cleanup_tree_cfg ();
 }