https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77308
--- Comment #31 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Sure, combine cant help, especially because it runs before split1.
But I wondered why this peephole2 is not enabled:
(define_peephole2 ; ldrd
[(set (match_operand:SI 0 "arm_general_register_operand" "")
(match_operand:SI 2 "memory_operand" ""))
(set (match_operand:SI 1 "arm_general_register_operand" "")
(match_operand:SI 3 "memory_operand" ""))]
"TARGET_LDRD
&& current_tune->prefer_ldrd_strd
&& !optimize_function_for_size_p (cfun)"
[(const_int 0)]
I have -march=armv7-a / -mcpu=cortex-a9 and thus for me
current_tune-> prefer_ldrd_strd is FALSE.
Furthermore, if I want to do -Os the third condition is FALSE too.
But one ldrd must be shorter than two ldr ?
That seems wrong...
