egcs/gcc ChangeLog c-common.c c-decl.c explow. ...

[geoffk at gcc dot gnu dot org]

CVSROOT:	/cvs/gcc
Module name:	egcs
Changes by:	geoffk@sourceware.cygnus.com	99/12/03 19:00:04

Modified files:
	gcc            : ChangeLog c-common.c c-decl.c explow.c flags.h 
	                 function.c function.h invoke.texi md.texi 
	                 optabs.c rtl.h toplev.c tree.h 
	gcc/config/i960: i960.c i960.md 
	gcc/config/m68k: m68k.c m68k.md 
	gcc/config/rs6000: rs6000.c rs6000.md 
	gcc/cp         : ChangeLog decl.c 

Log message:
	* c-common.c (enum attrs): Add A_NO_LIMIT_STACK.
	(init_attributes): Add A_NO_LIMIT_STACK.
	(decl_attributes): Handle A_NO_LIMIT_STACK.
	* c-decl.c (duplicate_decls): Handle DECL_NO_LIMIT_STACK.
	* explow.c (allocate_dynamic_stack_space) [!HAVE_allocate_stack]:
	Handle stack bounds checking.
	* flags.h (flag_stack_check): Use the word 'probe' rather than
	'check', because the flag doesn't actually cause any checking to
	be done.
	* function.c (expand_function_start): Set
	current_function_limit_stack.
	* function.h (struct function): Add limit_stack.
	(current_function_limit_stack): Define.
	* invoke.texi (Code Gen Options): Document new options.
	* rtl.h: Declare stack_limit_rtx.
	* toplev.c (stack_limit_rtx): New variable.
	(decode_f_option): Handle new options -fstack-limit-register=REG,
	-fstack-limit-symbol=IDENT, -fno-stack-limit.
	(main): Add stack_limit_rtx as GC root.
	* tree.h (DECL_NO_LIMIT_STACK): New macro.
	(struct tree_decl): New member no_limit_stack.
	
	* config/rs6000/rs6000.c (rs6000_allocate_stack_space): Handle
	stack_limit_rtx.
	* config/rs6000/rs6000.md (allocate_stack): Handle stack_limit_rtx.
	(conditional_trap+1): Get new mnemonic correct.
	(conditional_trap+2): New pattern for DImode traps.
	
	* config/m68k/m68k.c (output_function_prologue): Handle
	stack_limit_rtx.
	* config/m68k/m68k.md (trap): New insn.
	(conditional_trap): New insn.
	* md.texi (Standard Names): Document `trap' and
	`conditional_trap'.
	* optabs.c (gen_cond_trap): Use start_sequence()/end_sequence()
	so a cc0 setter doesn't get emitted at some random place in the
	function.
	
	* config/i960/i960.md (trap): New insn.
	(conditional_trap): New expander.
	(conditional_trap+1, conditional_trap+2): New insns for signed
	and unsigned cases.
	* config/i960/i960.c (i960_function_prologue): Use
	STARTING_FRAME_OFFSET.  Handle stack_limit_rtx.