[COMMITTED] LRA enabling on ARM

[Yvan Roux]

Hi,

after the discussion in the thread below I've committed the enabling
of LRA on ARM through the new option -mlra. Notice that we still rely
on reload until the regression has been resolved.

http://gcc.gnu.org/ml/gcc-patches/2013-10/msg00908.html

Thanks,
Yvan

2013-10-16  Yvan Roux  <yvan.r...@linaro.org>

        * config/arm/arm.opt (mlra): New option.
        * config/arm/arm.c (arm_lra_p): New function.
        (TARGET_LRA_P): Define.

arm-lra.diff
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