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[lra] patch to fix arm bootstrap.

After a few recent changes, I found that arm bootstrap broken again. I found a latent bug whose occurrence is triggered by recent changes. The following patch mostly fixes the bug.

The patch was successfully bootstrapped on x86/x86-64 (arm bootstrap result will be available only this night).

Committed as rev. 184637.

2012-02-28 Vladimir Makarov <vmakarov@redhat.com>

        * lra-constraints.c (get_op_mode): Use mode from the machine
        description first.
        (match_reload, process_addr_reg, simplify_operand_subreg)
        (curr_insn_transform): Put after-reloads before already existing
        ones.
        (process_address): Use find_regno_note instead find_reg_note.

Attachment: arm-bootstrap.patch
Description: Text document

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