-/** Returns the memory input of the IncSP. */
-ir_node *be_get_IncSP_mem(ir_node *irn);
-
-/** Sets a new offset to a IncSP node. */
-void be_set_IncSP_offset(ir_node *irn, unsigned offset);
+/**
+ * Sets a new offset to a IncSP node.
+ * A positive offset means expanding the stack, a negative offset shrinking
+ * an offset is == BE_STACK_FRAME_SIZE will be replaced by the real size of the
+ * stackframe in the fix_stack_offsets phase.
+ */
+void be_set_IncSP_offset(ir_node *irn, int offset);