workaround for dead CF: restart the optimization

[r20076]

diff --git a/ir/opt/cfopt.c b/ir/opt/cfopt.c
index be03bfa..ddb8e53 100644 (file)
--- a/ir/opt/cfopt.c
+++ b/ir/opt/cfopt.c
@@ -707,6 +707,7 @@ void optimize_cf(ir_graph *irg) {
        /* FIXME: is this still needed? */
        edges_deactivate(irg);
 
+restart:
        env.changed    = 0;
        env.phis_moved = 0;
 
@@ -762,11 +763,11 @@ void optimize_cf(ir_graph *irg) {
                set_irg_doms_inconsistent(irg);
                set_irg_extblk_inconsistent(irg);
                set_irg_loopinfo_inconsistent(irg);
+               goto restart;
        }
 
        /* Optimize the standard code. */
        env.changed = 0;
-       assure_doms(irg);
        irg_block_walk(get_irg_end_block(irg), optimize_blocks, remove_simple_blocks, &env);
 
        /* Walk all keep alives, optimize them if block, add to new in-array