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