always compute doms in optimize_graph_df instead of hoping for them to be available

[libfirm] / ir / ir / irgraph.c

diff --git a/ir/ir/irgraph.c b/ir/ir/irgraph.c
index 6a96a4b..ba6e16e 100644 (file)
--- a/ir/ir/irgraph.c
+++ b/ir/ir/irgraph.c
@@ -494,7 +494,7 @@ long get_irg_graph_nr(const ir_graph *irg)
 }
 #endif
 
-int get_irg_idx(const ir_graph *irg)
+size_t get_irg_idx(const ir_graph *irg)
 {
        return irg->index;
 }