[PATCH] Don't init ira_spilled_reg_stack_slots in ira if using lra.

[Kito Cheng]

Hi all:

This patch is clean up useless initialize for IRA with LRA.

2014-08-27  Kito Cheng  <kito@0xlab.org>

        * ira.c (ira): Don't initialize ira_spilled_reg_stack_slots and
        ira_spilled_reg_stack_slots_num if using lra.
        (do_reload): Remove release ira_spilled_reg_stack_slots part.
        * ira-color.c (ira_sort_regnos_for_alter_reg): Add assertion to
        make sure not using lra.
        (ira_reuse_stack_slot): Likewise.
        (ira_mark_new_stack_slot): Likewise.
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