[rfc]: Use trad_frame_alloc_saved_regs in alpha-tdep

[Markus Deuling]

Hi,

this is a follow-up from http://sourceware.org/ml/gdb-patches/2007-11/msg00301.html.

There are still some places where frame_obstack_zalloc is used instead of trad_frame_alloc_saved_regs. 

This patch makes alpha-tdep use trad_frame_alloc_saved_regs. I'd appreciate it very much if someone with access to an alpha machine could run the testsuite.

Tested by building with enable-targets=all. Ok ?

ChangeLog:

	* alpha-tdep.c (alpha_heuristic_unwind_cache): Replace saved_regs by
	trad_frame_saved_reg. Remove return_reg.
	(trad-frame.h): New include. 
	(alpha_heuristic_frame_unwind_cache): Use trad_frame_alloc_saved_regs
	instead of frame_obstack_zalloc. 
	(alpha_heuristic_frame_prev_register): Use trad_frame_get_prev_register.

	* Makefile.in (alpha-tdep.o): Add dependency to trad_frame_h. 



-- 
  Markus Deuling
  GNU Toolchain for Linux on Cell BE
  deuling@de.ibm.com

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