* basic-block.h (basic_block_computed_jump_target): Declare.
	* flags.h: (current_function_has_computed_jump): Declare.
	* flow.c: (basic_block_computed_jump_target): Define.
	(flow_analysis): Allocate it. Set current_function_has_computed_jump
	to 0.
	(find_basic_blocks): Set current_function_has_computed_jump and
	elements of basic_block_computed_jump_target to 1 as appropriate.
	* function.c: (current_function_has_computed_jump): Define.
	* global.c (global_conflicts): Don't allocate pseudos into stack regs
	at the start of a block that is reachable by a computed jump.
	* reg-stack.c (stack_reg_life_analysis): If must restart, do so
	immediately.
	(subst_stack_regs): Undo change from Sep 4 1997.
	(uses_reg_or_mem): Now unused, deleted.
	* stupid.c (stupid_life_analysis): Compute
	current_function_has_computed_jump.
	(stupid_find_reg): Don't allocate stack regs if the function has a
	computed goto.
        * haifa-sched.c (is_cfg_nonregular): Delete code to determine if
        the current function has a computed jump.  Use the global value
        instead.

Co-Authored-By: Jeffrey A Law <law@cygnus.com>

From-SVN: r18860