Thanks! Committed!
Jose E. Marchesi writes:
> Hi Cuper.
>
> Sorry, I missed this patch last week.
> This is OK.
>
> Thanks!
>
>> This patch forces __builtin_memcmp calls upto data sizes of 1024 to
>> become inline in caller.
>> This is a requirement by BPF and it mimics the default behaviour of the
>> clang BPF implementation.
>>
>> gcc/ChangeLog:
>> * config/bpf/bpf.cc (bpf_use_by_pieces_infrastructure_p): Added
>> function to bypass default behaviour.
>> * config/bpf/bpf.h (COMPARE_MAX_PIECES): Defined to 1024 bytes.
>> ---
>> gcc/config/bpf/bpf.cc | 16 ++++++++++++++++
>> gcc/config/bpf/bpf.h | 5 +++++
>> 2 files changed, 21 insertions(+)
>>
>> diff --git a/gcc/config/bpf/bpf.cc b/gcc/config/bpf/bpf.cc
>> index a0956a069729..764a3e487cb6 100644
>> --- a/gcc/config/bpf/bpf.cc
>> +++ b/gcc/config/bpf/bpf.cc
>> @@ -1115,6 +1115,22 @@ bpf_small_register_classes_for_mode_p (machine_mode
>> mode)
>> #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P \
>> bpf_small_register_classes_for_mode_p
>>
>> +static bool
>> +bpf_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size,
>> + unsigned int align ATTRIBUTE_UNUSED,
>> + enum by_pieces_operation op,
>> + bool speed_p)
>> +{
>> + if (op != COMPARE_BY_PIECES)
>> + return default_use_by_pieces_infrastructure_p (size, align, op,
>> speed_p);
>> +
>> + return size <= COMPARE_MAX_PIECES;
>> +}
>> +
>> +#undef TARGET_USE_BY_PIECES_INFRASTRUCTURE_P
>> +#define TARGET_USE_BY_PIECES_INFRASTRUCTURE_P \
>> + bpf_use_by_pieces_infrastructure_p
>> +
>> /* Finally, build the GCC target. */
>>
>> struct gcc_target targetm = TARGET_INITIALIZER;
>> diff --git a/gcc/config/bpf/bpf.h b/gcc/config/bpf/bpf.h
>> index 82702aa7b6ba..1f177ec4c4ef 100644
>> --- a/gcc/config/bpf/bpf.h
>> +++ b/gcc/config/bpf/bpf.h
>> @@ -489,6 +489,11 @@ enum reg_class
>> locations. */
>> #define MOVE_MAX 8
>>
>> +/* Allow upto 1024 bytes moves to occur using by_pieces
>> + infrastructure. This mimics clang behaviour when using
>> + __builtin_memcmp. */
>> +#define COMPARE_MAX_PIECES 1024
>> +
>> /* An alias for the machine mode for pointers. */
>> #define Pmode DImode
