[COMMITTED][AArch64] Improve TLS Descriptor pattern to release RTL loop IV opt

[Jiong Wang]

Andreas Schwab writes:

> Jiong Wang <jiong.wang@arm.com> writes:
>
>>   I Just finished several round of rebuild & testing on clean
>>   environment.
>
> How did you even manage to compile it?
>
> ../../gcc/ira.c: In function 'void print_translated_classes(FILE*, bool)':
> ../../gcc/ira.c:1415:49: error: iteration 8u invokes undefined behavior [-Werror=aggressive-loop-optimizations]
>      fprintf (f, " %s -> %s\n", reg_class_names[i],
>                                                  ^
> ../../gcc/ira.c:1414:17: note: containing loop
>    for (i = 0; i < N_REG_CLASSES; i++)

And, my new patch missed a ',' after "FIXED_REG0", sorry about
that.. that should be the problem for the bootstrap issue.


>
> Andreas.

-- 
Regards,
Jiong