--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -5777,6 +5777,41 @@
         (const_string "none")))
    (set_attr "mode" "QI")])

+;; Split non destructive adds if we cannot use lea.
+(define_split
+  [(set (match_operand:SWI48 0 "register_operand" "")
+	(plus:SWI48 (match_operand:SWI48 1 "register_operand" "")
+              (match_operand:SWI48 2 "nonmemory_operand" "")))
+   (clobber (reg:CC FLAGS_REG))]
+  "reload_completed && ix86_avoid_lea_for_add (insn, operands)"
+  [(set (match_dup 0) (match_dup 1))
+   (parallel [(set (match_dup 0) (plus:<MODE> (match_dup 0) (match_dup 2)))
+	      (clobber (reg:CC FLAGS_REG))])
+  ]
+)

Put all closing braces on one line:

	      (clobber (reg:CC FLAGS_REG))])])

+;; Split lea into one or more ALU instructions if profitable.
+(define_split
+  [(set (match_operand:SI 0 "register_operand" "")
+	(subreg:SI (match_operand:DI 1 "lea_address_operand" "") 0))]
+  "reload_completed && ix86_avoid_lea_for_addr (insn, operands)"
+  [(const_int 0)]
+{
+  ix86_split_lea_for_addr (operands, SImode);
+  DONE;
+})

This is valid only for TARGET_64BIT.

Please note that x32 adds quite some different LEA patterns (see
i386.md, line 5466+). I suggest you merge your splitters with these
define_insn patterns into define_insn_and_split, adding "&&
reload_completed && ix86_avoid_lea_for_addr (insn, operands)" as a
split condition.

Uros.