emit-rtl.c (gen_rtx_REG): Always return the same rtx for PIC_OFFSET_TABLE_REGNUM.

emit-rtl.c (gen_rtx_REG): Always return the same rtx for PIC_OFFSET_TABLE_REGNUM.

        * emit-rtl.c (gen_rtx_REG): Always return the same rtx
        for PIC_OFFSET_TABLE_REGNUM.
        (init_emit_once): Use gen_raw_REG to initialize pic_offset_table_rtx.

From-SVN: r49234