* asan.c (handle_builtin_alloca): Deal with all alloca variants.
	(get_mem_refs_of_builtin_call): Likewise.
	* builtins.c (expand_builtin_apply): Adjust call to
	allocate_dynamic_stack_space.
	(expand_builtin_alloca): For __builtin_alloca_with_align_and_max, pass
	the third argument to allocate_dynamic_stack_space, otherwise -1.
	(expand_builtin): Deal with all alloca variants.
	(is_inexpensive_builtin): Likewise.
	* builtins.def (BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX): New.
	* calls.c (special_function_p): Deal with all alloca variants.
	(initialize_argument_information): Adjust call to
	allocate_dynamic_stack_space.
	(expand_call): Likewise.
	* cfgexpand.c (expand_call_stmt): Deal with all alloca variants.
	* doc/extend.texi (Built-ins): Add __builtin_alloca_with_align_and_max
	* explow.c (allocate_dynamic_stack_space): Add MAX_SIZE parameter and
	use it for the stack usage computation.
	* explow.h (allocate_dynamic_stack_space): Adjust prototype.
	* function.c (gimplify_parameters): Turn BUILT_IN_ALLOCA_WITH_ALIGN
	into BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX and pass maximum size.
	* gimple-ssa-warn-alloca.c (alloca_call_type): Simplify control flow.
	Take into account 3rd argument of __builtin_alloca_with_align_and_max.
	(in_loop_p): Remove first argument and useless check.
	(pass_walloca::execute): Remove useless test and adjust call to above.
	* gimple.c (gimple_build_call_from_tree): Deal with all alloc variants
	* gimplify.c (gimplify_vla_decl): Turn BUILT_IN_ALLOCA_WITH_ALIGN into
	BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX and pass maximum size.
	(gimplify_call_expr): Deal with all alloca variants.
	* hsa-gen.c (gen_hsa_alloca): Likewise.
	(gen_hsa_insns_for_call): Likewise.
	* ipa-pure-const.c (special_builtin_state): Likewise.
	* tree-chkp.c (chkp_build_returned_bound): Likewise.
	* tree-object-size.c (alloc_object_size): Likewise.
	* tree-ssa-alias.c (ref_maybe_used_by_call_p_1): Likewise.
	(call_may_clobber_ref_p_1): Likewise.
	* tree-ssa-ccp.c (evaluate_stmt): Likewise.
	(ccp_fold_stmt): Likewise.
	(optimize_stack_restore): Likewise.
	* tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Likewise.
	(mark_all_reaching_defs_necessary_1): Likewise.
	(propagate_necessity): Likewise.
	(eliminate_unnecessary_stmts): Likewise.
	* tree.c (build_common_builtin_nodes): Build
	BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX.
	* tree.h (ALLOCA_FUNCTION_CODE_P): New macro.
	(CASE_BUILT_IN_ALLOCA): Likewise.
	* varasm.c (incorporeal_function_p): Deal with all alloca variants.
c-family/
	* c-common.c (check_builtin_function_arguments): Also check arguments
	of __builtin_alloca_with_align_and_max.

From-SVN: r253901