Gentle ping:
https://gcc.gnu.org/pipermail/gcc-patches/2021-December/587449.html
BR,
Kewen
> on 2021/12/29 下午5:36, Kewen.Lin via Gcc-patches wrote:
>> Hi,
>>
>> When TARGET_AVOID_XFORM is set, we turn off VSX. But at least from
>> ISA3.0 (Power9), we support DQ form vector load/store. This patch
>> is to make it not clear VSX when P9 VECTOR supported, it also checks
>> some flags which P9 VECTOR relies on, otherwise those flags could
>> disable P9 VECTOR later.
>>
>> Bootstrapped and regtested on powerpc64le-linux-gnu P9 and
>> powerpc64-linux-gnu P8.
>>
>> Is it ok for trunk?
>>
>> BR,
>> Kewen
>> -----
>> gcc/ChangeLog:
>>
>> * config/rs6000/rs6000.c (rs6000_option_override_internal): Consider
>> P9 VECTOR when determining to disable VSX for TARGET_AVOID_XFORM.
>> ---
>> gcc/config/rs6000/rs6000.c | 5 ++++-
>> 1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
>> index 66b01e589b0..c020947abc8 100644
>> --- a/gcc/config/rs6000/rs6000.c
>> +++ b/gcc/config/rs6000/rs6000.c
>> @@ -3865,7 +3865,10 @@ rs6000_option_override_internal (bool global_init_p)
>> rs6000_isa_flags_explicit |= OPTION_MASK_VSX;
>> }
>> }
>> - else if (TARGET_AVOID_XFORM > 0)
>> + else if (TARGET_AVOID_XFORM > 0
>> + /* Exclude P9 VECTOR which supports DQ form, but need to check
>> + some flags which are able to disable it as well. */
>> + && !(TARGET_ALTIVEC && TARGET_P8_VECTOR && TARGET_P9_VECTOR))
>> msg = N_("%<-mvsx%> needs indexed addressing");
>> else if (!TARGET_ALTIVEC && (rs6000_isa_flags_explicit
>> & OPTION_MASK_ALTIVEC))
>> --
>> 2.27.0
>>
>
