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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [flags.h] - Blame information for rev 841

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/* 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 3, 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 COPYING3.  If not see
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<http://www.gnu.org/licenses/>.  */
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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;
151
 
152
/* 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;
160
 
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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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187
extern int flag_debug_asm;
188
 
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/* Generate code for GNU or NeXT Objective-C runtime environment.  */
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191
extern int flag_next_runtime;
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193
extern int flag_dump_rtl_in_asm;
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195
/* 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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200
/* 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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   For each variable, there is an _log variant which is the power
218
   of two not less than the variable, for .align output.  */
219
 
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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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235
/* 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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258
/* A string that's used when a random name is required.  NULL means
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   to make it really random.  */
260
 
261
extern const char *flag_random_seed;
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263
/* Returns TRUE if generated code should match ABI version N or
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   greater is in use.  */
265
 
266
#define abi_version_at_least(N) \
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  (flag_abi_version == 0 || flag_abi_version >= (N))
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269
/* 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) \
275
  (MODE_HAS_NANS (MODE) && !flag_finite_math_only)
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277
/* 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.  */
292
#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.
302
 
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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.  */
313
#define TYPE_OVERFLOW_TRAPS(TYPE) \
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  (!TYPE_UNSIGNED (TYPE) && flag_trapv)
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316
/* Names for the different levels of -Wstrict-overflow=N.  The numeric
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   values here correspond to N.  */
318
 
319
enum warn_strict_overflow_code
320
{
321
  /* 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).  */
332
  WARN_STRICT_OVERFLOW_COMPARISON = 3,
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  /* Overflow warnings not covered by the above cases.  Example:
334
     folding ((x * 10) / 5) to (x * 2).  */
335
  WARN_STRICT_OVERFLOW_MISC = 4,
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  /* Overflow warnings about reducing magnitude of constants in
337
     comparison.  Example: folding (x + 2 > y) to (x + 1 >= y).  */
338
  WARN_STRICT_OVERFLOW_MAGNITUDE = 5
339
};
340
 
341
/* Whether to emit an overflow warning whose code is C.  */
342
#define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))
343
 
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#endif /* ! GCC_FLAGS_H */

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