X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbeutil.c;h=935612ef57ffa9e68ec9a5a08abfc693073ff2dc;hb=4d7a9507baf1737297cd4f7fc91eab209fd5d398;hp=97e12684b0982701ba1ad1e6a9f72c10815e526c;hpb=4c66ebcce62ceffb68a891142dd309429e03351a;p=libfirm

diff --git a/ir/be/beutil.c b/ir/be/beutil.c
index 97e12684b..935612ef5 100644
--- a/ir/be/beutil.c
+++ b/ir/be/beutil.c
@@ -4,9 +4,12 @@
 
 #include <stdio.h>
 
+#include "pset.h"
+
 #include "irgraph.h"
 #include "irgwalk.h"
 #include "irdump_t.h"
+#include "irdom_t.h"
 #include "ircons.h"
 #include "iropt.h"
 #include "irgopt.h"
@@ -16,6 +19,16 @@
 #include "besched_t.h"
 #include "bearch.h"
 
+pset *be_empty_set(void)
+{
+	static pset *empty_set = NULL;
+
+	if(!empty_set)
+		empty_set = pset_new_ptr_default();
+
+	return empty_set;
+}
+
 struct dump_env {
   FILE *f;
   arch_env_t *env;
@@ -131,7 +144,7 @@ static int sched_edge_hook(FILE *F, ir_node *irn)
 void dump_ir_block_graph_sched(ir_graph *irg, const char *suffix) {
     DUMP_NODE_EDGE_FUNC old = get_dump_node_edge_hook();
 
-		dump_consts_local(0);
+	dump_consts_local(0);
     set_dump_node_edge_hook(sched_edge_hook);
     dump_ir_block_graph(irg, suffix);
     set_dump_node_edge_hook(old);
@@ -160,3 +173,20 @@ void be_collect_phis(ir_graph *irg)
 {
 	irg_walk_graph(irg, collect_phis, NULL, NULL);
 }
+
+
+ir_node *dom_up_search(pset *accept, ir_node *start_point_exclusive) {
+	ir_node *irn, *idom;
+
+	/* search the current block */
+	for (irn=sched_prev(start_point_exclusive); irn; irn=sched_prev(irn))
+		if (pset_find_ptr(accept, irn))
+			return irn;
+
+	idom = get_Block_idom(get_nodes_block(start_point_exclusive));
+
+	if (idom)
+		return dom_up_search(accept, idom); /* continue search in idom-block */
+	else
+		return NULL; /* this was the start block and we did not find an acceptable irn */
+}