gcc/config/avr/avr-log.c

   1 /* Subroutines for log output for Atmel AVR back end.
   2    Copyright (C) 2011-2016 Free Software Foundation, Inc.
   3    Contributed by Georg-Johann Lay (avr@gjlay.de)
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    GCC is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GCC; see the file COPYING3.  If not see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25 #include "function.h"
  26 #include "rtl.h"
  27 #include "tree.h"
  28 #include "tree-pass.h"  /* for current_pass */
  29 #include "memmodel.h"
  30 #include "tm_p.h"
  31 #include "print-tree.h"
  32
  33 /* This file supplies some functions for AVR back-end developers
  34    with a printf-like interface.  The functions are called through
  35    macros `avr_dump', `avr_edump' or `avr_fdump' from avr-protos.h:
  36
  37    avr_fdump (FILE *stream, const char *fmt, ...);
  38    avr_edump (fmt, ...) is a shortcut for avr_fdump (stderr, fmt, ...)
  39    avr_dump (fmt, ...)  is a shortcut for avr_fdump (dump_file, fmt, ...)
  40
  41   == known %-codes ==
  42
  43   b: bool
  44   r: rtx
  45   t: tree
  46   T: tree (brief)
  47   C: enum rtx_code
  48   m: machine_mode
  49   R: enum reg_class
  50   L: insn list
  51   H: location_t
  52
  53   == no arguments ==
  54
  55   A: call abort()
  56   f: current_function_name()
  57   F: caller (via __FUNCTION__)
  58   P: Pass name and number
  59   ?: Print caller, current function and pass info
  60   !: Ditto, but only print if in a pass with static pass number,
  61      else return.
  62
  63   == same as printf ==
  64
  65   %: %
  66   c: char
  67   s: string
  68   d: int (decimal)
  69   x: int (hex)
  70 */
  71
  72 /* Set according to -mlog= option.  */
  73 avr_log_t avr_log;
  74
  75 /* The worker function implementing the %-codes */
  76 static void avr_log_vadump (FILE*, const char*, va_list);
  77
  78 /* Wrapper for avr_log_vadump.  If STREAM is NULL we are called by avr_dump,
  79    i.e. output to dump_file if available.  The 2nd argument is __FUNCTION__.
  80    The 3rd argument is the format string. */
  81
  82 int
  83 avr_vdump (FILE *stream, const char *caller, ...)
  84 {
  85   va_list ap;
  86
  87   if (NULL == stream && dump_file)
  88     stream = dump_file;
  89
  90   va_start (ap, caller);
  91   if (stream)
  92     avr_log_vadump (stream, caller, ap);
  93   va_end (ap);
  94
  95   return 1;
  96 }
  97
  98
  99 /* Worker function implementing the %-codes and forwarding to
 100    respective print/dump function.  */
 101
 102 static void
 103 avr_log_vadump (FILE *file, const char *caller, va_list ap)
 104 {
 105   char bs[3] = {'\\', '?', '\0'};
 106
 107   /* 3rd proper argument is always the format string.  */
 108   const char *fmt = va_arg (ap, const char*);
 109
 110   while (*fmt)
 111     {
 112       switch (*fmt++)
 113         {
 114         default:
 115           fputc (*(fmt-1), file);
 116           break;
 117
 118         case '\\':
 119           bs[1] = *fmt++;
 120           fputs (bs, file);
 121           break;
 122
 123         case '%':
 124           switch (*fmt++)
 125             {
 126             case '%':
 127               fputc ('%', file);
 128               break;
 129
 130             case 't':
 131               {
 132                 tree t = va_arg (ap, tree);
 133                 if (NULL_TREE == t)
 134                   fprintf (file, "<NULL-TREE>");
 135                 else
 136                   {
 137                     if (stderr == file)
 138                       debug_tree (t);
 139                     else
 140                       {
 141                         print_node (file, "", t, 0);
 142                         putc ('\n', file);
 143                       }
 144                   }
 145                 break;
 146               }
 147
 148             case 'T':
 149               print_node_brief (file, "", va_arg (ap, tree), 3);
 150               break;
 151
 152             case 'd':
 153               fprintf (file, "%d", va_arg (ap, int));
 154               break;
 155
 156             case 'x':
 157               fprintf (file, "%x", va_arg (ap, int));
 158               break;
 159
 160             case 'b':
 161               fprintf (file, "%s", va_arg (ap, int) ? "true" : "false");
 162               break;
 163
 164             case 'c':
 165               fputc (va_arg (ap, int), file);
 166               break;
 167
 168             case 'r':
 169               print_inline_rtx (file, va_arg (ap, rtx), 0);
 170               break;
 171
 172             case 'L':
 173               {
 174                 rtx_insn *insn = safe_as_a <rtx_insn *> (va_arg (ap, rtx));
 175
 176                 while (insn)
 177                   {
 178                     print_inline_rtx (file, insn, 0);
 179                     fprintf (file, "\n");
 180                     insn = NEXT_INSN (insn);
 181                   }
 182                 break;
 183               }
 184
 185             case 'f':
 186               if (cfun && cfun->decl)
 187                 fputs (current_function_name(), file);
 188               break;
 189
 190             case 's':
 191               {
 192                 const char *str = va_arg (ap, char*);
 193                 fputs (str ? str : "(null)", file);
 194               }
 195               break;
 196
 197             case 'm':
 198               fputs (GET_MODE_NAME ((machine_mode) va_arg (ap, int)),
 199                      file);
 200               break;
 201
 202             case 'C':
 203               fputs (rtx_name[va_arg (ap, int)], file);
 204               break;
 205
 206             case 'R':
 207               fputs (reg_class_names[va_arg (ap, int)], file);
 208               break;
 209
 210             case 'F':
 211               fputs (caller, file);
 212               break;
 213
 214             case 'H':
 215               {
 216                 location_t loc = va_arg (ap, location_t);
 217
 218                 if (BUILTINS_LOCATION == loc)
 219                   fprintf (file, "<BUILTIN-LOCATION>");
 220                 else if (UNKNOWN_LOCATION == loc)
 221                   fprintf (file, "<UNKNOWN-LOCATION>");
 222                 else
 223                   fprintf (file, "%s:%d",
 224                            LOCATION_FILE (loc), LOCATION_LINE (loc));
 225
 226                 break;
 227               }
 228
 229             case '!':
 230               if (!current_pass)
 231                 return;
 232               /* FALLTHRU */
 233
 234             case '?':
 235               avr_vdump (file, caller, "%F[%f:%P]");
 236               break;
 237
 238             case 'P':
 239               if (current_pass)
 240                 fprintf (file, "%s(%d)",
 241                          current_pass->name,
 242                          current_pass->static_pass_number);
 243               else
 244                 fprintf (file, "pass=?");
 245
 246               break;
 247
 248             case 'A':
 249               fflush (file);
 250               abort();
 251
 252             default:
 253               /* Unknown %-code: Stop printing */
 254
 255               fprintf (file, "??? %%%c ???%s\n", *(fmt-1), fmt);
 256               fmt = "";
 257
 258               break;
 259             }
 260           break; /* % */
 261         }
 262     }
 263
 264   fflush (file);
 265 }
 266
 267
 268 /* Called from avr.c:avr_option_override().
 269    Parse argument of -mlog= and set respective fields in avr_log.  */
 270
 271 void
 272 avr_log_set_avr_log (void)
 273 {
 274   bool all = TARGET_ALL_DEBUG != 0;
 275
 276   if (all)
 277     avr_log_details = "all";
 278
 279   if (all || avr_log_details)
 280     {
 281       /* Adding , at beginning and end of string makes searching easier.  */
 282
 283       char *str = (char*) alloca (3 + strlen (avr_log_details));
 284       bool info;
 285
 286       str[0] = ',';
 287       strcat (stpcpy (str+1, avr_log_details), ",");
 288
 289       all |= NULL != strstr (str, ",all,");
 290       info = NULL != strstr (str, ",?,");
 291
 292       if (info)
 293         fprintf (stderr, "\n-mlog=");
 294
 295 #define SET_DUMP_DETAIL(S)                                       \
 296       do {                                                       \
 297         avr_log.S = (all || NULL != strstr (str, "," #S ","));   \
 298         if (info)                                                \
 299           fprintf (stderr, #S ",");                              \
 300       } while (0)
 301
 302       SET_DUMP_DETAIL (address_cost);
 303       SET_DUMP_DETAIL (builtin);
 304       SET_DUMP_DETAIL (constraints);
 305       SET_DUMP_DETAIL (legitimate_address_p);
 306       SET_DUMP_DETAIL (legitimize_address);
 307       SET_DUMP_DETAIL (legitimize_reload_address);
 308       SET_DUMP_DETAIL (progmem);
 309       SET_DUMP_DETAIL (rtx_costs);
 310
 311 #undef SET_DUMP_DETAIL
 312
 313       if (info)
 314         fprintf (stderr, "?\n\n");
 315     }
 316 }