X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbenode_t.h;h=db9259f1b52f815f2f24c50f1056c34ed790248f;hb=7b71c0bebe3c21ae2bfe11ebaa0ade64e3e39cdb;hp=72289c34ddbab3903c676a60b165bfb86dff1156;hpb=8b5f5ff3484444ec7f2143e19e9b0029892cf1af;p=libfirm

diff --git a/ir/be/benode_t.h b/ir/be/benode_t.h
index 72289c34d..db9259f1b 100644
--- a/ir/be/benode_t.h
+++ b/ir/be/benode_t.h
@@ -157,6 +157,20 @@ void be_set_Copy_op(ir_node *cpy, ir_node *op);
  * Make a new Perm node.
  */
 ir_node *be_new_Perm(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, int arity, ir_node *in[]);
+
+/**
+ * Reduce a Perm.
+ * Basically, we provide a map to remap the Perm's arguments. If an entry in the
+ * map is -1, the argument gets deleted.
+ * This function takes care, that the register data and the input array reflects
+ * the changes described by the map.
+ * This is needed by the Perm optimization/movement in belower.c, see push_through_perm().
+ * @param perm     The perm node.
+ * @param new_size The new number of arguments (must be smaller or equal to the current one).
+ * @param map      A map assigning each operand a new index (or -1 to indicate deletion).
+ */
+void be_Perm_reduce(ir_node *perm, int new_size, int *map);
+
 /**
  * Create a new MemPerm node.
  */
@@ -211,9 +225,10 @@ enum {
 };
 
 enum {
-	pn_be_AddSP_res  = 0,
-	pn_be_AddSP_M    = 1,
-	pn_be_AddSP_last = 2
+	pn_be_AddSP_sp   = 0,
+	pn_be_AddSP_res  = 1,
+	pn_be_AddSP_M    = 2,
+	pn_be_AddSP_last = 3
 };
 
 /**
@@ -240,7 +255,7 @@ enum {
 };
 
 enum {
-	pn_be_SubSP_res  = 0,
+	pn_be_SubSP_sp   = 0,
 	pn_be_SubSP_M    = 1,
 	pn_be_SubSP_last = 2
 };