[PATCH/AARCH64] Accept vulcan as a cpu name for the AArch64 port of GCC

[Virendra Pathak <virendra dot pathak at broadcom dot com>]

Hi,

Please find the patch for introducing vulcan as a cpu name for the
AArch64 port of GCC.
Broadcom's vulcan is an armv8.1-a aarch64 server processor.

Since vulcan is the first armv8.1-a processor to be introduced in
aarch64-cores.def,
I have created a new section in the file for the armv8.1 based processors.
Kindly let me know if that is okay.

Tested the patch with cross aarch64-linux-gnu, bootstrapped native
aarch64-unknown-linux-gnu
and make check (gcc, ld, gas, binutils, gdb).
No new regression failure is added by this patch.

In addition, tested -mcpu=vulcan -mtune=vulcan flags by passing them
via command line.
Also verified that above flags passes armv8.1-a option to assembler(as).

At present we are using schedule & cost model of cortex-a57 but
soon we will be submitting one for vulcan.

Please review the patch.
Ok for trunk?


gcc/ChangeLog:

Virendra Pathak <virendra.pathak@broadcom.com>

        * config/aarch64/aarch64-cores.def (vulcan): New core.
        * config/aarch64/aarch64-tune.md: Regenerate.
        * doc/invoke.texi: Document vulcan as an available option.




with regards,
Virendra Pathak

Attachment: 0001-AArch64-Accept-vulcan-as-a-cpu-name-for-the-AArch64-.patch.txt
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