add simple load-after-load and loaf-after-store optimization as localopt

[libfirm] / ir / be / bearch.h

diff --git a/ir/be/bearch.h b/ir/be/bearch.h
index 8218df0..6a68866 100644 (file)
--- a/ir/be/bearch.h
+++ b/ir/be/bearch.h
@@ -40,6 +40,13 @@
 #include "beirg.h"
 #include "error.h"
 
+/**
+ * this constant is returned by the get_sp_bias functions if the stack
+ * is reset (usually because the frame pointer is copied to the stack
+ * pointer
+ */
+#define SP_BIAS_RESET      INT_MIN
+
 typedef enum arch_register_class_flags_t {
        arch_register_class_flag_none      = 0,
        /** don't do automatic register allocation for this class */
@@ -611,8 +618,6 @@ struct arch_env_t {
        const arch_register_t *bp;               /**< The base pointer register. */
        const arch_register_class_t *link_class; /**< The static link pointer
                                                      register class. */
-       int                    stack_dir;        /**< -1 for decreasing, 1 for
-                                                     increasing. */
        int                    stack_alignment;  /**< power of 2 stack alignment */
        const be_main_env_t   *main_env;         /**< the be main environment */
        int                    spill_cost;       /**< cost for a be_Spill node */