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/* Subroutines for log output for Atmel AVR back end.

   Copyright (C) 2011 Free Software Foundation, Inc.

   Contributed by Georg-Johann Lay (avr@gjlay.de)

   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 3, 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 COPYING3.  If not see

   <http://www.gnu.org/licenses/>.  */

#include "config.h"

#include "system.h"

#include "coretypes.h"

#include "tm.h"

#include "rtl.h"

#include "tree.h"

#include "output.h"

#include "input.h"

#include "function.h"

#include "tm_p.h"

#include "tree-pass.h"

/* This file supplies some functions for AVR back-end developers

   with a printf-like interface.  The functions are called through

   macros avr_edump or avr_fdump from avr-protos.h:

      avr_edump (const char * fmt, ...);

      avr_fdump (FILE * stream, const char * fmt, ...);

   avr_edump (fmt, ...) is a shortcut for avr_fdump (stderr, fmt, ...)

  == known %-codes ==

  b: bool

  r: rtx

  t: tree

  T: tree (brief)

  C: enum rtx_code

  m: enum machine_mode

  R: enum reg_class

  D: double_int (signed decimal)

  X: double_int (unsigned hex)

  L: insn list

  H: location_t

  == no arguments ==

  A: call abort()

  f: current_function_name()

  F: caller (via __FUNCTION__)

  P: Pass name and number

  ?: Print caller, current function and pass info

  !: Ditto, but only print if in a pass with static pass number,

     else return.

  == same as printf ==

  %: %

  c: char

  s: string

  d: int (decimal)

  x: int (hex)

*/

/* Set according to -mlog= option.  */

avr_log_t avr_log;

/* The caller as of __FUNCTION__ */

static const char *avr_log_caller = "?";

/* The worker function implementing the %-codes */

static void avr_log_vadump (FILE*, const char*, va_list);

/* As we have no variadic macros, avr_edump maps to a call to

   avr_log_set_caller_e which saves __FUNCTION__ to avr_log_caller and

   returns a function pointer to avr_log_fdump_e.  avr_log_fdump_e

   gets the printf-like arguments and calls avr_log_vadump, the

   worker function.  avr_fdump works the same way.  */

/* Provide avr_log_fdump_e/f so that avr_log_set_caller_e/_f can return

   their address.  */

static int

avr_log_fdump_e (const char *fmt, ...)

{

  va_list ap;

  va_start (ap, fmt);

  avr_log_vadump (stderr, fmt, ap);

  va_end (ap);

  return 1;

}

static int

avr_log_fdump_f (FILE *stream, const char *fmt, ...)

{

  va_list ap;

  va_start (ap, fmt);

  if (stream)

    avr_log_vadump (stream, fmt, ap);

  va_end (ap);

  return 1;

}

/* Macros avr_edump/avr_fdump map to calls of the following two functions,

   respectively.  You don't need to call them directly.  */

int (*

avr_log_set_caller_e (const char *caller)

     )(const char*, ...)

{

  avr_log_caller = caller;

  return avr_log_fdump_e;

}

int (*

avr_log_set_caller_f (const char *caller)

     )(FILE*, const char*, ...)

{

  avr_log_caller = caller;

  return avr_log_fdump_f;

}

/* Copy-paste from double-int.c:double_int_split_digit (it's static there).

   Splits last digit of *CST (taken as unsigned) in BASE and returns it.  */

static unsigned

avr_double_int_pop_digit (double_int *cst, unsigned base)

{

  unsigned HOST_WIDE_INT resl, reml;

  HOST_WIDE_INT resh, remh;

  div_and_round_double (FLOOR_DIV_EXPR, true, cst->low, cst->high, base, 0,

                        &resl, &resh, &reml, &remh);

  cst->high = resh;

  cst->low = resl;

  return reml;

}

/* Dump VAL as hex value to FILE.  */

static void

avr_dump_double_int_hex (FILE *file, double_int val)

{

  unsigned digit[4];

  digit[0] = avr_double_int_pop_digit (&val, 1 << 16);

  digit[1] = avr_double_int_pop_digit (&val, 1 << 16);

  digit[2] = avr_double_int_pop_digit (&val, 1 << 16);

  digit[3] = avr_double_int_pop_digit (&val, 1 << 16);

  fprintf (file, "0x");

  if (digit[3] | digit[2])

    fprintf (file, "%04x%04x", digit[3], digit[2]);

  if (digit[3] | digit[2] | digit[1] | digit[0])

    fprintf (file, "%04x%04x", digit[1], digit[0]);

  else

    fprintf (file, "0");

}

/* Worker function implementing the %-codes and forwarding to

   respective print/dump function.  */

static void

avr_log_vadump (FILE *file, const char *fmt, va_list ap)

{

  char bs[3] = {'\\', '?', '\0'};

  while (*fmt)

    {

      switch (*fmt++)

        {

        default:

          fputc (*(fmt-1), file);

          break;

        case '\\':

          bs[1] = *fmt++;

          fputs (bs, file);

          break;

        case '%':

          switch (*fmt++)

            {

            case '%':

              fputc ('%', file);

              break;

            case 't':

              {

                tree t = va_arg (ap, tree);

                if (NULL_TREE == t)

                  fprintf (file, "<NULL-TREE>");

                else

                  {

                    if (stderr == file)

                      debug_tree (t);

                    else

                      {

                        print_node (file, "", t, 0);

                        putc ('\n', file);

                      }

                  }

                break;

              }

            case 'T':

              print_node_brief (file, "", va_arg (ap, tree), 3);

              break;

            case 'd':

              fprintf (file, "%d", va_arg (ap, int));

              break;

            case 'D':

              dump_double_int (file, va_arg (ap, double_int), false);

              break;

            case 'X':

              avr_dump_double_int_hex (file, va_arg (ap, double_int));

              break;

            case 'x':

              fprintf (file, "%x", va_arg (ap, int));

              break;

            case 'b':

              fprintf (file, "%s", va_arg (ap, int) ? "true" : "false");

              break;

            case 'c':

              fputc (va_arg (ap, int), file);

              break;

            case 'r':

              print_inline_rtx (file, va_arg (ap, rtx), 0);

              break;

            case 'L':

              {

                rtx insn = va_arg (ap, rtx);

                while (insn)

                  {

                    print_inline_rtx (file, insn, 0);

                    fprintf (file, "\n");

                    insn = NEXT_INSN (insn);

                  }

                break;

              }

            case 'f':

              if (cfun && cfun->decl)

                fputs (current_function_name(), file);

              break;

            case 's':

              {

                const char *str = va_arg (ap, char*);

                fputs (str ? str : "(null)", file);

              }

              break;

            case 'm':

              fputs (GET_MODE_NAME (va_arg (ap, enum machine_mode)), file);

              break;

            case 'C':

              fputs (rtx_name[va_arg (ap, enum rtx_code)], file);

              break;

            case 'R':

              fputs (reg_class_names[va_arg (ap, enum reg_class)], file);

              break;

            case 'F':

              fputs (avr_log_caller, file);

              break;

            case 'H':

              {

                location_t loc = va_arg (ap, location_t);

                if (BUILTINS_LOCATION == loc)

                  fprintf (file, "<BUILTIN-LOCATION>");

                else if (UNKNOWN_LOCATION == loc)

                  fprintf (file, "<UNKNOWN-LOCATION>");

                else

                  fprintf (file, "%s:%d",

                           LOCATION_FILE (loc), LOCATION_LINE (loc));

                break;

              }

            case '!':

              if (!current_pass)

                return;

              /* FALLTHRU */

            case '?':

              avr_log_fdump_f (file, "%F[%f:%P]");

              break;

            case 'P':

              if (current_pass)

                fprintf (file, "%s(%d)",

                         current_pass->name,

                         current_pass->static_pass_number);

              else

                fprintf (file, "pass=?");

              break;

            case 'A':

              fflush (file);

              abort();

            default:

              /* Unknown %-code: Stop printing */

              fprintf (file, "??? %%%c ???%s\n", *(fmt-1), fmt);

              fmt = "";

              break;

            }

          break; /* % */

        }

    }

  fflush (file);

}

/* Called from avr.c:avr_option_override().

   Parse argument of -mlog= and set respective fields in avr_log.  */

void

avr_log_set_avr_log (void)

{

  bool all = TARGET_ALL_DEBUG != 0;

  if (all || avr_log_details)

    {

      /* Adding , at beginning and end of string makes searching easier.  */

      char *str = (char*) alloca (3 + strlen (avr_log_details));

      bool info;

      str[0] = ',';

      strcat (stpcpy (str+1, avr_log_details), ",");

      all |= NULL != strstr (str, ",all,");

      info = NULL != strstr (str, ",?,");

      if (info)

        fprintf (stderr, "\n-mlog=");

#define SET_DUMP_DETAIL(S)                                       \

      do {                                                       \

        avr_log.S = (all || NULL != strstr (str, "," #S ","));   \

        if (info)                                                \

          fprintf (stderr, #S ",");                              \

      } while (0)

      SET_DUMP_DETAIL (address_cost);

      SET_DUMP_DETAIL (builtin);

      SET_DUMP_DETAIL (constraints);

      SET_DUMP_DETAIL (legitimate_address_p);

      SET_DUMP_DETAIL (legitimize_address);

      SET_DUMP_DETAIL (legitimize_reload_address);

      SET_DUMP_DETAIL (progmem);

      SET_DUMP_DETAIL (rtx_costs);

#undef SET_DUMP_DETAIL

      if (info)

        fprintf (stderr, "?\n\n");

    }

}