[PATCH][ARM] New rtx cost table for Cortex-A7

[Kyrill Tkachov]

Hi all,

This patch adds the new rtx costs for the Cortex-A7 core as well as a new tuning 
structure to contain it.

Tested arm-none-eabi on qemu and no benchmark regressions.

Ok for trunk?

Thanks,
Kyrill

[gcc/]
2013-10-29  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * config/arm/arm.c (cortexa7_extra_costs): New table.
     (arm_cortex_a7_tune): New.
     * config/arm/arm-cores.def: Use cortex_a7 tuning for cortex-a7.
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