From b38f3813f7ba380b33607e114a7efa9901191924 Mon Sep 17 00:00:00 2001 From: Eric Botcazou Date: Sat, 16 Aug 2008 18:40:57 +0000 Subject: re PR middle-end/20548 (ACATS c52103x c52104x c52104y segfault) PR ada/20548 * common.opt (-fstack-check): Do not declare the variable here. (-fstack-check=): New option variant. * doc/invoke.texi (Code Gen Options): Document it. * expr.h (STACK_OLD_CHECK_PROTECT): New macro. (STACK_CHECK_PROTECT): Bump to 3 pages if DWARF-2 EH is used. (STACK_CHECK_STATIC_BUILTIN): New macro. * doc/tm.texi (Stack Checking): Document STACK_CHECK_STATIC_BUILTIN. * opts.c: Include expr.h. (common_handle_option) : New case. : Likewise. * calls.c (initialize_argument_information): Use TYPE_SIZE_UNIT consistently in the test for variable-sized types. Adjust for new behaviour of flag_stack_check. * explow.c: Include except.h. (allocate_dynamic_stack_space): Do not take into account STACK_CHECK_MAX_FRAME_SIZE for static builtin stack checking. * function.c (gimplify_parameters): Use DECL_SIZE_UNIT in the test for variable-sized parameters. Treat all parameters whose size is greater than STACK_CHECK_MAX_VAR_SIZE as variable-sized if generic stack checking is enabled. * gimplify.c (gimplify_decl_expr): Treat non-static objects whose size is greater than STACK_CHECK_MAX_VAR_SIZE as variable-sized if generic stack checking is enabled. (expand_function_end): Adjust for new behaviour of flag_stack_check. * reload1.c (reload): Likewise. * stmt.c (expand_decl): Assert that all automatic variables have fixed size at this point and remove dead code. * flags.h (stack_check_type): New enumeration type. (flag_stack_check): Declare. * toplev.c (flag_stack_check): New global variable. * Makefile.in (opts.o): Add dependency on EXPR_H. (explow.o): Add dependency on except.h. ada/ * gcc-interface/decl.c (gnat_to_gnu_entity): Use DECL_SIZE_UNIT in the setjmp test consistently. Adjust for new behaviour of flag_stack_check. * gcc-interface/utils2.c (build_call_alloc_dealloc): Remove redundant test of flag_stack_check. Adjust for new behaviour of flag_stack_check. From-SVN: r139159 --- gcc/flags.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'gcc/flags.h') diff --git a/gcc/flags.h b/gcc/flags.h index cfd278f..1de81f8 100644 --- a/gcc/flags.h +++ b/gcc/flags.h @@ -254,6 +254,27 @@ extern int flag_var_tracking; warning message in case flag was set by -fprofile-{generate,use}. */ extern bool flag_speculative_prefetching_set; +/* Type of stack check. */ +enum stack_check_type +{ + /* Do not check the stack. */ + NO_STACK_CHECK = 0, + + /* Check the stack generically, i.e. assume no specific support + from the target configuration files. */ + GENERIC_STACK_CHECK, + + /* Check the stack and rely on the target configuration files to + check the static frame of functions, i.e. use the generic + mechanism only for dynamic stack allocations. */ + STATIC_BUILTIN_STACK_CHECK, + + /* Check the stack and entirely rely on the target configuration + files, i.e. do not use the generic mechanism at all. */ + FULL_BUILTIN_STACK_CHECK +}; +extern enum stack_check_type flag_stack_check; + /* Returns TRUE if generated code should match ABI version N or greater is in use. */ -- cgit v1.1