2007-07-10  Sandra Loosemore  <sandra@codesourcery.com>
	    David Ung  <davidu@mips.com>
            Nigel Stephens <nigel@mips.com>

	gcc/
	Add target hooks invoked when starting RTL code generation for
	each function.

	* target-def.h (TARGET_PREPARE_FUNCTION_START): Define.
	(TARGET_END_OF_FILE_CLEANUP): Define
	(TARGET_INITIALIZER):  Add entries for above symbols.
	* target.h (struct gcc_target):  Add prepare_function_start
	and end_of_file_cleanup slots.
	* doc/tm.texi (TARGET_PREPARE_FUNCTION_START): Document.
	(TARGET_END_OF_FILE_CLEANUP): Likewise.
	* function.c (prepare_function_start): Invoke prepare_function_start
	target hook.
	* toplev.c (compile_file): Invoke end_of_file_cleanup target hook.