i386.md (adddi3_carry_rex64, [...]): Name pattern.
* i386.md (adddi3_carry_rex64, subdi3_carry_rex64): Name pattern.
(addhi3_carry, addqi3_carry, subhi3_carry, subqi3_carry): New patterns.
(add??cc): New expanders.
* i386.c (expand_int_addcc): New function.
* i386-protos.h (expand_int_addcc): Declare.
* alias.c (memory_modified_1): New static function.
(memory_modified): New static varaible.
(memory_modified_in_insn_p): New global function.
* rtl.h (memory_modified_in_insn_p): Declare.
* rtlanal.c (modified_between_p, modified_in_p): Be smart about memory
references.