gcc/flags.h

   1 /* Compilation switch flag definitions for GCC.
   2    Copyright (C) 1987-2018 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_FLAGS_H
  21 #define GCC_FLAGS_H
  22
  23 #if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)
  24
  25 /* Names of debug_info_type, for error messages.  */
  26 extern const char *const debug_type_names[];
  27
  28 extern void strip_off_ending (char *, int);
  29 extern int base_of_path (const char *path, const char **base_out);
  30
  31 /* Return true iff flags are set as if -ffast-math.  */
  32 extern bool fast_math_flags_set_p (const struct gcc_options *);
  33 extern bool fast_math_flags_struct_set_p (struct cl_optimization *);
  34
  35 \f
  36 /* Now the symbols that are set with `-f' switches.  */
  37
  38 /* True if printing into -fdump-final-insns= dump.  */
  39
  40 extern bool final_insns_dump_p;
  41
  42 \f
  43 /* Other basic status info about current function.  */
  44
  45 /* Align flags tuple with alignment in log form and with a maximum skip.  */
  46
  47 struct align_flags_tuple
  48 {
  49   /* Values of the -falign-* flags: how much to align labels in code.
  50      log is "align to 2^log" (so 0 means no alignment).
  51      maxskip is the maximum allowed amount of padding to insert.  */
  52   int log;
  53   int maxskip;
  54 };
  55
  56 /* Target-dependent global state.  */
  57
  58 struct align_flags
  59 {
  60   align_flags_tuple levels[2];
  61 };
  62
  63 struct target_flag_state
  64 {
  65   /* Each falign-foo can generate up to two levels of alignment:
  66      -falign-foo=N:M[:N2:M2] */
  67   align_flags x_align_loops;
  68   align_flags x_align_jumps;
  69   align_flags x_align_labels;
  70   align_flags x_align_functions;
  71
  72   /* The excess precision currently in effect.  */
  73   enum excess_precision x_flag_excess_precision;
  74 };
  75
  76 extern struct target_flag_state default_target_flag_state;
  77 #if SWITCHABLE_TARGET
  78 extern struct target_flag_state *this_target_flag_state;
  79 #else
  80 #define this_target_flag_state (&default_target_flag_state)
  81 #endif
  82
  83 #define state_align_loops        (this_target_flag_state->x_align_loops)
  84 #define state_align_jumps        (this_target_flag_state->x_align_jumps)
  85 #define state_align_labels       (this_target_flag_state->x_align_labels)
  86 #define state_align_functions    (this_target_flag_state->x_align_functions)
  87 #define align_loops_log          (state_align_loops.levels[0].log)
  88 #define align_jumps_log          (state_align_jumps.levels[0].log)
  89 #define align_labels_log         (state_align_labels.levels[0].log)
  90 #define align_functions_log      (state_align_functions.levels[0].log)
  91 #define align_loops_max_skip     (state_align_loops.levels[0].maxskip)
  92 #define align_jumps_max_skip     (state_align_jumps.levels[0].maxskip)
  93 #define align_labels_max_skip    (state_align_labels.levels[0].maxskip)
  94 #define align_functions_max_skip (state_align_functions.levels[0].maxskip)
  95 #define align_loops_value        (align_loops_max_skip + 1)
  96 #define align_jumps_value        (align_jumps_max_skip + 1)
  97 #define align_labels_value       (align_labels_max_skip + 1)
  98 #define align_functions_value    (align_functions_max_skip + 1)
  99
 100 /* String representaions of the above options are available in
 101    const char *str_align_foo.  NULL if not set.  */
 102
 103 #define flag_excess_precision \
 104   (this_target_flag_state->x_flag_excess_precision)
 105
 106 /* Returns TRUE if generated code should match ABI version N or
 107    greater is in use.  */
 108
 109 #define abi_version_at_least(N) \
 110   (flag_abi_version == 0 || flag_abi_version >= (N))
 111
 112 /* Whether to emit an overflow warning whose code is C.  */
 113 #define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))
 114
 115 #endif
 116
 117 #endif /* ! GCC_FLAGS_H */