set the right macro block header for to upper part of an splitted block

[r17514]

diff --git a/ir/ir/irgmod.c b/ir/ir/irgmod.c
index 3d83477..dfd05b8 100644 (file)
--- a/ir/ir/irgmod.c
+++ b/ir/ir/irgmod.c
@@ -220,7 +220,14 @@ void part_block(ir_node *node) {
        mbh       = get_Block_MacroBlock(old_block);
        new_block = new_Block(get_Block_n_cfgpreds(old_block),
                              get_Block_cfgpred_arr(old_block));
-       set_irn_n(new_block, -1, mbh);
+
+       if (mbh != old_block) {
+               /* we splitting a partBlock */
+               set_irn_n(new_block, -1, mbh);
+       } else {
+               /* we are splitting a header: this creates a new header */
+               set_irn_n(new_block, -1, new_block);
+       }
        set_irg_current_block(current_ir_graph, new_block);
        {
                ir_node *jmp = new_Jmp();
@@ -253,6 +260,7 @@ void part_block(ir_node *node) {
                        assert(is_Block(curr));
 
                        next = get_irn_link(block);
+                       assert(get_Block_MacroBlock(curr) == mbh);
 
                        for (;;) {
                                if (curr == old_block) {