* alpha.c (alpha_initialize_trampoline): Take arguments describing
        the layout.  Use ptr_mode.  Disable hint generation.  Use gen_imb.
        * alpha.h (INITIALIZE_TRAMPOLINE): Pass extra args to the init func.
        (TRANSFER_FROM_TRAMPOLINE): Move ...
        * alpha/osf.h: ... here.
        * alpha/vms.h (INITIALIZE_TRAMPOLINE): Use alpha_initialize_trampoline.
        (TRANSFER_FROM_TRAMPOLINE): Remove undef.
        * alpha/win-nt.h: Likewise.
        * alpha/vxworks.h: Likewise.
        * alpha/linux.h: Revert gcc2 merge lossage.

From-SVN: r20864