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  1. 2012-01-22  Christian Svensson  <blue@cmd.nu>
  2.  
  3.         * common/config/or1k/or1k-common.c: use DWARF2 unwind info as default
  4.          but support SJLJ if forced with --enable-sjlj-exceptions.
  5.         * config/or1k/or1k-protos.h:
  6.         (or1k_expand_pic_symbol_ref) removed unneeded ATTRIBUTE_UNUSED.
  7.         (or1k_eh_return_handler_rtx) defined prototype (body in or1k.c).
  8.         (or1k_return_addr_rtx) defined prototype (body in or1k.c).
  9.         * config/or1k/or1k.c:
  10.         (or1k_save_reg_p) save stack pointer when frame pointer is not saved.
  11.         (or1k_save_reg_p) save registers used with eh_return.
  12.         (or1k_expand_epilogue) do not restore link register if we are
  13.         returning from eh_return.
  14.         (or1k_expand_epilogue) apply EH stack adjustment to stack pointer.
  15.         (or1k_eh_return_handler_rtx) eh_return should write to the link register.
  16.         (or1k_return_addr_rtx) in the case of GOT the link register cannot be read
  17.         after the prologue. in this case, use the stored link register from the
  18.         stack frame.
  19.         (or1k_frame_pointer_required) require FP in eh_return and
  20.         when alloca is used.
  21.         (TARGET_FRAME_POINTER_REQUIRED) define.
  22.         * config/or1k/or1k.h:
  23.         (INITIAL_FRAME_POINTER_OFFSET) not used, removed.
  24.         (RETURN_ADDR_RTX) define.
  25.         (EH_RETURN_REGNUM) define. use reg 23.
  26.         (EH_RETURN_DATA_REGNO) define. use reg 25, 27, 29 and 31.
  27.         (EH_RETURN_STACKADJ_RTX) define.
  28.         (EH_RETURN_HANDLER_RTX) define.
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