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Diffstat (limited to 'contrib/gcc/flags.h')
| -rw-r--r-- | contrib/gcc/flags.h | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/contrib/gcc/flags.h b/contrib/gcc/flags.h new file mode 100644 index 0000000..226fb60 --- /dev/null +++ b/contrib/gcc/flags.h @@ -0,0 +1,345 @@ +/* Compilation switch flag definitions for GCC. + Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, + 2003, 2004, 2005, 2006, 2007 + Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 2, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ + +#ifndef GCC_FLAGS_H +#define GCC_FLAGS_H + +#include "options.h" + +enum debug_info_type +{ + NO_DEBUG, /* Write no debug info. */ + DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */ + SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */ + DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */ + XCOFF_DEBUG, /* Write IBM/Xcoff debug info (using dbxout.c). */ + VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */ + VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c). + and DWARF v2 debug info (using dwarf2out.c). */ +}; + +/* Specify which kind of debugging info to generate. */ +extern enum debug_info_type write_symbols; + +/* Names of debug_info_type, for error messages. */ +extern const char *const debug_type_names[]; + +enum debug_info_level +{ + DINFO_LEVEL_NONE, /* Write no debugging info. */ + DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */ + DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */ + DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */ +}; + +/* Specify how much debugging info to generate. */ +extern enum debug_info_level debug_info_level; + +/* Nonzero means use GNU-only extensions in the generated symbolic + debugging information. */ +extern bool use_gnu_debug_info_extensions; + +/* Enumerate visibility settings. This is deliberately ordered from most + to least visibility. */ +#ifndef SYMBOL_VISIBILITY_DEFINED +#define SYMBOL_VISIBILITY_DEFINED +enum symbol_visibility +{ + VISIBILITY_DEFAULT, + VISIBILITY_PROTECTED, + VISIBILITY_HIDDEN, + VISIBILITY_INTERNAL +}; +#endif + +/* The default visibility for all symbols (unless overridden). */ +extern enum symbol_visibility default_visibility; + +struct visibility_flags +{ + unsigned inpragma : 1; /* True when in #pragma GCC visibility. */ + unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */ +}; + +/* Global visibility options. */ +extern struct visibility_flags visibility_options; + +/* Nonzero means do optimizations. -opt. */ + +extern int optimize; + +/* Nonzero means optimize for size. -Os. */ + +extern int optimize_size; + +/* Do print extra warnings (such as for uninitialized variables). + -W/-Wextra. */ + +extern bool extra_warnings; + +/* Nonzero to warn about unused variables, functions et.al. Use + set_Wunused() to update the -Wunused-* flags that correspond to the + -Wunused option. */ + +extern void set_Wunused (int setting); + +/* Nonzero means warn about any objects definitions whose size is larger + than N bytes. Also want about function definitions whose returned + values are larger than N bytes. The value N is in `larger_than_size'. */ + +extern bool warn_larger_than; +extern HOST_WIDE_INT larger_than_size; + +/* Nonzero means warn about constructs which might not be strict + aliasing safe. */ + +extern int warn_strict_aliasing; + +/* Nonzero means warn about optimizations which rely on undefined + signed overflow. */ + +extern int warn_strict_overflow; + +/* Temporarily suppress certain warnings. + This is set while reading code from a system header file. */ + +extern int in_system_header; + +/* Nonzero for -dp: annotate the assembly with a comment describing the + pattern and alternative used. */ + +extern int flag_print_asm_name; + +/* Now the symbols that are set with `-f' switches. */ + +/* Nonzero means `char' should be signed. */ + +extern int flag_signed_char; + +/* Nonzero means give an enum type only as many bytes as it needs. A value + of 2 means it has not yet been initialized. */ + +extern int flag_short_enums; + +/* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ + +extern int flag_pcc_struct_return; + +/* 0 means straightforward implementation of complex divide acceptable. + 1 means wide ranges of inputs must work for complex divide. + 2 means C99-like requirements for complex multiply and divide. */ + +extern int flag_complex_method; + +/* Nonzero means that we don't want inlining by virtue of -fno-inline, + not just because the tree inliner turned us off. */ + +extern int flag_really_no_inline; + +/* Nonzero if we are only using compiler to check syntax errors. */ + +extern int rtl_dump_and_exit; + +/* Nonzero means we should save auxiliary info into a .X file. */ + +extern int flag_gen_aux_info; + +/* Nonzero means suppress output of instruction numbers and line number + notes in debugging dumps. */ + +extern int flag_dump_unnumbered; + +/* Nonzero means change certain warnings into errors. + Usually these are warnings about failure to conform to some standard. */ + +extern int flag_pedantic_errors; + +/* Nonzero if we are compiling code for a shared library, zero for + executable. */ + +extern int flag_shlib; + +/* -dA causes debug information to be produced in + the generated assembly code (to make it more readable). This option + is generally only of use to those who actually need to read the + generated assembly code (perhaps while debugging the compiler itself). + Currently, this switch is only used by dwarfout.c; however, it is intended + to be a catchall for printing debug information in the assembler file. */ + +extern int flag_debug_asm; + +/* Generate code for GNU or NeXT Objective-C runtime environment. */ + +extern int flag_next_runtime; + +extern int flag_dump_rtl_in_asm; + +/* If one, renumber instruction UIDs to reduce the number of + unused UIDs if there are a lot of instructions. If greater than + one, unconditionally renumber instruction UIDs. */ +extern int flag_renumber_insns; + +/* Other basic status info about current function. */ + +/* Nonzero means current function must be given a frame pointer. + Set in stmt.c if anything is allocated on the stack there. + Set in reload1.c if anything is allocated on the stack there. */ + +extern int frame_pointer_needed; + +/* Nonzero if subexpressions must be evaluated from left-to-right. */ +extern int flag_evaluation_order; + +/* Value of the -G xx switch, and whether it was passed or not. */ +extern unsigned HOST_WIDE_INT g_switch_value; +extern bool g_switch_set; + +/* Values of the -falign-* flags: how much to align labels in code. + 0 means `use default', 1 means `don't align'. + For each variable, there is an _log variant which is the power + of two not less than the variable, for .align output. */ + +extern int align_loops_log; +extern int align_loops_max_skip; +extern int align_jumps_log; +extern int align_jumps_max_skip; +extern int align_labels_log; +extern int align_labels_max_skip; +extern int align_functions_log; + +/* Like align_functions_log above, but used by front-ends to force the + minimum function alignment. Zero means no alignment is forced. */ +extern int force_align_functions_log; + +/* Nonzero if we dump in VCG format, not plain text. */ +extern int dump_for_graph; + +/* Selection of the graph form. */ +enum graph_dump_types +{ + no_graph = 0, + vcg +}; +extern enum graph_dump_types graph_dump_format; + +/* Nonzero means to collect statistics which might be expensive + and to print them when we are done. */ +extern int flag_detailed_statistics; + +/* Nonzero means that we defer emitting functions until they are actually + used. */ +extern int flag_remove_unreachable_functions; + +/* Nonzero if we should track variables. */ +extern int flag_var_tracking; + +/* True if flag_speculative_prefetching was set by user. Used to suppress + warning message in case flag was set by -fprofile-{generate,use}. */ +extern bool flag_speculative_prefetching_set; + +/* A string that's used when a random name is required. NULL means + to make it really random. */ + +extern const char *flag_random_seed; + +/* Returns TRUE if generated code should match ABI version N or + greater is in use. */ + +#define abi_version_at_least(N) \ + (flag_abi_version == 0 || flag_abi_version >= (N)) + +/* True if the given mode has a NaN representation and the treatment of + NaN operands is important. Certain optimizations, such as folding + x * 0 into 0, are not correct for NaN operands, and are normally + disabled for modes with NaNs. The user can ask for them to be + done anyway using the -funsafe-math-optimizations switch. */ +#define HONOR_NANS(MODE) \ + (MODE_HAS_NANS (MODE) && !flag_finite_math_only) + +/* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */ +#define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE)) + +/* As for HONOR_NANS, but true if the mode can represent infinity and + the treatment of infinite values is important. */ +#define HONOR_INFINITIES(MODE) \ + (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only) + +/* Like HONOR_NANS, but true if the given mode distinguishes between + positive and negative zero, and the sign of zero is important. */ +#define HONOR_SIGNED_ZEROS(MODE) \ + (MODE_HAS_SIGNED_ZEROS (MODE) && !flag_unsafe_math_optimizations) + +/* Like HONOR_NANS, but true if given mode supports sign-dependent rounding, + and the rounding mode is important. */ +#define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \ + (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math) + +/* True if overflow wraps around for the given integral type. That + is, TYPE_MAX + 1 == TYPE_MIN. */ +#define TYPE_OVERFLOW_WRAPS(TYPE) \ + (TYPE_UNSIGNED (TYPE) || flag_wrapv) + +/* True if overflow is undefined for the given integral type. We may + optimize on the assumption that values in the type never overflow. + + IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED + must issue a warning based on warn_strict_overflow. In some cases + it will be appropriate to issue the warning immediately, and in + other cases it will be appropriate to simply set a flag and let the + caller decide whether a warning is appropriate or not. */ +#define TYPE_OVERFLOW_UNDEFINED(TYPE) \ + (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow) + +/* True if overflow for the given integral type should issue a + trap. */ +#define TYPE_OVERFLOW_TRAPS(TYPE) \ + (!TYPE_UNSIGNED (TYPE) && flag_trapv) + +/* Names for the different levels of -Wstrict-overflow=N. The numeric + values here correspond to N. */ + +enum warn_strict_overflow_code +{ + /* Overflow warning that should be issued with -Wall: a questionable + construct that is easy to avoid even when using macros. Example: + folding (x + CONSTANT > x) to 1. */ + WARN_STRICT_OVERFLOW_ALL = 1, + /* Overflow warning about folding a comparison to a constant because + of undefined signed overflow, other than cases covered by + WARN_STRICT_OVERFLOW_ALL. Example: folding (abs (x) >= 0) to 1 + (this is false when x == INT_MIN). */ + WARN_STRICT_OVERFLOW_CONDITIONAL = 2, + /* Overflow warning about changes to comparisons other than folding + them to a constant. Example: folding (x + 1 > 1) to (x > 0). */ + WARN_STRICT_OVERFLOW_COMPARISON = 3, + /* Overflow warnings not covered by the above cases. Example: + folding ((x * 10) / 5) to (x * 2). */ + WARN_STRICT_OVERFLOW_MISC = 4, + /* Overflow warnings about reducing magnitude of constants in + comparison. Example: folding (x + 2 > y) to (x + 1 >= y). */ + WARN_STRICT_OVERFLOW_MAGNITUDE = 5 +}; + +/* Whether to emit an overflow warning whose code is C. */ +#define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c)) + +#endif /* ! GCC_FLAGS_H */ |
