we can't guarantee that there won't be dead blocks, so remove them

[r24175]

diff --git a/ir/be/ia32/bearch_ia32.c b/ir/be/ia32/bearch_ia32.c
index 7bdbf26..9cf6a01 100644 (file)
--- a/ir/be/ia32/bearch_ia32.c
+++ b/ir/be/ia32/bearch_ia32.c
@@ -867,11 +867,18 @@ static void ia32_before_abi(void *self) {
  * Transforms the standard firm graph into
  * an ia32 firm graph
  */
-static void ia32_prepare_graph(void *self) {
-       ia32_code_gen_t *cg = self;
+static void ia32_prepare_graph(void *self)
+{
+       ia32_code_gen_t *cg  = self;
+       ir_graph        *irg = cg->irg;
 
        /* do local optimizations */
-       optimize_graph_df(cg->irg);
+       optimize_graph_df(irg);
+
+       /* we have to do cfopt+remove_critical_edges as we can't have Bad-blocks
+        * or critical edges in the backend */
+       optimize_cf(irg);
+       remove_critical_cf_edges(irg);
 
        /* TODO: we often have dead code reachable through out-edges here. So for
         * now we rebuild edges (as we need correct user count for code selection)