-static bool load_kills_store (rtx, rtx, int);
-static bool find_loads (rtx, rtx, int);
-static bool store_killed_in_insn (rtx, rtx, rtx, int);
-static bool store_killed_after (rtx, rtx, rtx, basic_block, int *, rtx *);
-static bool store_killed_before (rtx, rtx, rtx, basic_block, int *);
+static bool load_kills_store (const_rtx, const_rtx, int);
+static bool find_loads (const_rtx, const_rtx, int);
+static bool store_killed_in_insn (const_rtx, const_rtx, const_rtx, int);
+static bool store_killed_after (const_rtx, const_rtx, const_rtx, const_basic_block, int *, rtx *);
+static bool store_killed_before (const_rtx, const_rtx, const_rtx, const_basic_block, int *);