X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbenode_t.h;h=f550185a2952755f1a52a9ad8aec5add9f925303;hb=b9d45e08e23bcf058fa8f2d9e18dd78e8cccd044;hp=850ea141706d87a493132097492930f3fddc321e;hpb=88036a81928ac4e2246c29dcf41eeddf508e8429;p=libfirm

diff --git a/ir/be/benode_t.h b/ir/be/benode_t.h
index 850ea1417..f550185a2 100644
--- a/ir/be/benode_t.h
+++ b/ir/be/benode_t.h
@@ -39,6 +39,7 @@ extern ir_op *op_be_Call;
 extern ir_op *op_be_Return;
 extern ir_op *op_be_IncSP;
 extern ir_op *op_be_AddSP;
+extern ir_op *op_be_SubSP;
 extern ir_op *op_be_SetSP;
 extern ir_op *op_be_RegParams;
 extern ir_op *op_be_StackParam;
@@ -59,6 +60,7 @@ typedef enum {
 	beo_Call,
 	beo_Return,
 	beo_AddSP,
+	beo_SubSP,
 	beo_IncSP,
 	beo_SetSP,
 	beo_RegParams,
@@ -181,6 +183,35 @@ enum {
  */
 ir_node *be_new_AddSP(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *old_sp, ir_node *sz);
 
+/**
+ * Position numbers for the be_SubSP inputs
+ */
+enum {
+	be_pos_SubSP_old_sp = 0,
+	be_pos_SubSP_size   = 1,
+	be_pos_SubSP_last   = 2
+};
+
+enum {
+	pn_be_SubSP_res  = 0,
+	pn_be_SubSP_M    = 1,
+	pn_be_SubSP_last = 2
+};
+
+/**
+ * Make a new SubSP node.
+ * A SubSP node expresses a decrease of the stack pointer in the direction the stack
+ * grows. In contrast to IncSP, the amount of bytes the stack pointer is grown, is not
+ * given by a constant but an ordinary Firm node.
+ * @param sp     The stack pointer register.
+ * @param irg    The graph.
+ * @param bl     The block.
+ * @param old_sp The node representing the old stack pointer value.
+ * @param sz     The node expressing the size by which the stack pointer shall be grown.
+ * @return       A new DecSP node.
+ */
+ir_node *be_new_SubSP(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *old_sp, ir_node *sz);
+
 ir_node *be_new_SetSP(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *old_sp, ir_node *operand, ir_node *mem);
 
 /**