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/* Print RTL for GCC.

   Copyright (C) 1987, 1988, 1992, 1997, 1998, 1999, 2000, 2002, 2003,

   2004, 2005, 2007, 2008, 2009, 2010

   Free Software Foundation, Inc.

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/>.  */

/* This file is compiled twice: once for the generator programs,

   once for the compiler.  */

#ifdef GENERATOR_FILE

#include "bconfig.h"

#else

#include "config.h"

#endif

#include "system.h"

#include "coretypes.h"

#include "tm.h"

#include "rtl.h"

/* These headers all define things which are not available in

   generator programs.  */

#ifndef GENERATOR_FILE

#include "tree.h"

#include "real.h"

#include "flags.h"

#include "hard-reg-set.h"

#include "basic-block.h"

#include "diagnostic.h"

#include "cselib.h"

#include "tree-pass.h"

#endif

static FILE *outfile;

static int sawclose = 0;

static int indent;

static void print_rtx (const_rtx);

/* String printed at beginning of each RTL when it is dumped.

   This string is set to ASM_COMMENT_START when the RTL is dumped in

   the assembly output file.  */

const char *print_rtx_head = "";

/* Nonzero means suppress output of instruction numbers

   in debugging dumps.

   This must be defined here so that programs like gencodes can be linked.  */

int flag_dump_unnumbered = 0;

/* Nonzero means suppress output of instruction numbers for previous

   and next insns in debugging dumps.

   This must be defined here so that programs like gencodes can be linked.  */

int flag_dump_unnumbered_links = 0;

/* Nonzero means use simplified format without flags, modes, etc.  */

int flag_simple = 0;

/* Nonzero if we are dumping graphical description.  */

int dump_for_graph;

#ifndef GENERATOR_FILE

void

print_mem_expr (FILE *outfile, const_tree expr)

{

  fputc (' ', outfile);

  print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);

}

#endif

/* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */

static void

print_rtx (const_rtx in_rtx)

{

  int i = 0;

  int j;

  const char *format_ptr;

  int is_insn;

  if (sawclose)

    {

      if (flag_simple)

        fputc (' ', outfile);

      else

        fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");

      sawclose = 0;

    }

  if (in_rtx == 0)

    {

      fputs ("(nil)", outfile);

      sawclose = 1;

      return;

    }

  else if (GET_CODE (in_rtx) > NUM_RTX_CODE)

    {

       fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),

                print_rtx_head, indent * 2, "");

       sawclose = 1;

       return;

    }

  is_insn = INSN_P (in_rtx);

  /* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER

     in separate nodes and therefore have to handle them special here.  */

  if (dump_for_graph

      && (is_insn || NOTE_P (in_rtx)

          || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))

    {

      i = 3;

      indent = 0;

    }

  else

    {

      /* Print name of expression code.  */

      if (flag_simple && CONST_INT_P (in_rtx))

        fputc ('(', outfile);

      else

        fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));

      if (! flag_simple)

        {

          if (RTX_FLAG (in_rtx, in_struct))

            fputs ("/s", outfile);

          if (RTX_FLAG (in_rtx, volatil))

            fputs ("/v", outfile);

          if (RTX_FLAG (in_rtx, unchanging))

            fputs ("/u", outfile);

          if (RTX_FLAG (in_rtx, frame_related))

            fputs ("/f", outfile);

          if (RTX_FLAG (in_rtx, jump))

            fputs ("/j", outfile);

          if (RTX_FLAG (in_rtx, call))

            fputs ("/c", outfile);

          if (RTX_FLAG (in_rtx, return_val))

            fputs ("/i", outfile);

          /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */

          if ((GET_CODE (in_rtx) == EXPR_LIST

               || GET_CODE (in_rtx) == INSN_LIST)

              && (int)GET_MODE (in_rtx) < REG_NOTE_MAX)

            fprintf (outfile, ":%s",

                     GET_REG_NOTE_NAME (GET_MODE (in_rtx)));

          /* For other rtl, print the mode if it's not VOID.  */

          else if (GET_MODE (in_rtx) != VOIDmode)

            fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));

#ifndef GENERATOR_FILE

          if (GET_CODE (in_rtx) == VAR_LOCATION)

            {

              if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)

                fputs (" <debug string placeholder>", outfile);

              else

                print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));

              fputc (' ', outfile);

              print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));

              if (PAT_VAR_LOCATION_STATUS (in_rtx)

                  == VAR_INIT_STATUS_UNINITIALIZED)

                fprintf (outfile, " [uninit]");

              sawclose = 1;

              i = GET_RTX_LENGTH (VAR_LOCATION);

            }

#endif

        }

    }

#ifndef GENERATOR_FILE

  if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))

    i = 5;

#endif

  /* Get the format string and skip the first elements if we have handled

     them already.  */

  format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;

  for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)

    switch (*format_ptr++)

      {

        const char *str;

      case 'T':

        str = XTMPL (in_rtx, i);

        goto string;

      case 'S':

      case 's':

        str = XSTR (in_rtx, i);

      string:

        if (str == 0)

          fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);

        else

          {

            if (dump_for_graph)

              fprintf (outfile, " (\\\"%s\\\")", str);

            else

              fprintf (outfile, " (\"%s\")", str);

          }

        sawclose = 1;

        break;

        /* 0 indicates a field for internal use that should not be printed.

           An exception is the third field of a NOTE, where it indicates

           that the field has several different valid contents.  */

      case '0':

        if (i == 1 && REG_P (in_rtx))

          {

            if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))

              fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));

          }

#ifndef GENERATOR_FILE

        else if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)

          {

            int flags = SYMBOL_REF_FLAGS (in_rtx);

            if (flags)

              fprintf (outfile, " [flags 0x%x]", flags);

          }

        else if (i == 2 && GET_CODE (in_rtx) == SYMBOL_REF)

          {

            tree decl = SYMBOL_REF_DECL (in_rtx);

            if (decl)

              print_node_brief (outfile, "", decl, dump_flags);

          }

#endif

        else if (i == 4 && NOTE_P (in_rtx))

          {

            switch (NOTE_KIND (in_rtx))

              {

              case NOTE_INSN_EH_REGION_BEG:

              case NOTE_INSN_EH_REGION_END:

                if (flag_dump_unnumbered)

                  fprintf (outfile, " #");

                else

                  fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));

                sawclose = 1;

                break;

              case NOTE_INSN_BLOCK_BEG:

              case NOTE_INSN_BLOCK_END:

#ifndef GENERATOR_FILE

                dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));

#endif

                sawclose = 1;

                break;

              case NOTE_INSN_BASIC_BLOCK:

                {

#ifndef GENERATOR_FILE

                  basic_block bb = NOTE_BASIC_BLOCK (in_rtx);

                  if (bb != 0)

                    fprintf (outfile, " [bb %d]", bb->index);

#endif

                  break;

                }

              case NOTE_INSN_DELETED_LABEL:

                {

                  const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);

                  if (label)

                    fprintf (outfile, " (\"%s\")", label);

                  else

                    fprintf (outfile, " \"\"");

                }

                break;

              case NOTE_INSN_SWITCH_TEXT_SECTIONS:

                {

#ifndef GENERATOR_FILE

                  basic_block bb = NOTE_BASIC_BLOCK (in_rtx);

                  if (bb != 0)

                    fprintf (outfile, " [bb %d]", bb->index);

#endif

                  break;

                }

              case NOTE_INSN_VAR_LOCATION:

#ifndef GENERATOR_FILE

                fputc (' ', outfile);

                print_rtx (NOTE_VAR_LOCATION (in_rtx));

#endif

                break;

              default:

                break;

              }

          }

        else if (i == 8 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)

          /* Output the JUMP_LABEL reference.  */

          fprintf (outfile, "\n%s%*s -> %d", print_rtx_head, indent * 2, "",

                   INSN_UID (JUMP_LABEL (in_rtx)));

        else if (i == 0 && GET_CODE (in_rtx) == VALUE)

          {

#ifndef GENERATOR_FILE

            cselib_val *val = CSELIB_VAL_PTR (in_rtx);

            fprintf (outfile, " %u:%u", val->uid, val->hash);

            dump_addr (outfile, " @", in_rtx);

            dump_addr (outfile, "/", (void*)val);

#endif

          }

        else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)

          {

#ifndef GENERATOR_FILE

            fprintf (outfile, " D#%i",

                     DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));

#endif

          }

        break;

      case 'e':

      do_e:

        indent += 2;

        if (!sawclose)

          fprintf (outfile, " ");

        print_rtx (XEXP (in_rtx, i));

        indent -= 2;

        break;

      case 'E':

      case 'V':

        indent += 2;

        if (sawclose)

          {

            fprintf (outfile, "\n%s%*s",

                     print_rtx_head, indent * 2, "");

            sawclose = 0;

          }

        fputs (" [", outfile);

        if (NULL != XVEC (in_rtx, i))

          {

            indent += 2;

            if (XVECLEN (in_rtx, i))

              sawclose = 1;

            for (j = 0; j < XVECLEN (in_rtx, i); j++)

              print_rtx (XVECEXP (in_rtx, i, j));

            indent -= 2;

          }

        if (sawclose)

          fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");

        fputs ("]", outfile);

        sawclose = 1;

        indent -= 2;

        break;

      case 'w':

        if (! flag_simple)

          fprintf (outfile, " ");

        fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));

        if (! flag_simple)

          fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",

                   (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));

        break;

      case 'i':

        if (i == 4 && INSN_P (in_rtx))

          {

#ifndef GENERATOR_FILE

            /*  Pretty-print insn locators.  Ignore scoping as it is mostly

                redundant with line number information and do not print anything

                when there is no location information available.  */

            if (INSN_LOCATOR (in_rtx) && insn_file (in_rtx))

              fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));

#endif

          }

        else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)

          {

#ifndef GENERATOR_FILE

            fprintf (outfile, " %s:%i",

                     locator_file (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),

                     locator_line (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));

#endif

          }

        else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)

          {

#ifndef GENERATOR_FILE

            fprintf (outfile, " %s:%i",

                     locator_file (ASM_INPUT_SOURCE_LOCATION (in_rtx)),

                     locator_line (ASM_INPUT_SOURCE_LOCATION (in_rtx)));

#endif

          }

        else if (i == 6 && NOTE_P (in_rtx))

          {

            /* This field is only used for NOTE_INSN_DELETED_LABEL, and

               other times often contains garbage from INSN->NOTE death.  */

            if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL)

              fprintf (outfile, " %d",  XINT (in_rtx, i));

          }

        else

          {

            int value = XINT (in_rtx, i);

            const char *name;

#ifndef GENERATOR_FILE

            if (REG_P (in_rtx) && value < FIRST_PSEUDO_REGISTER)

              fprintf (outfile, " %d %s", REGNO (in_rtx),

                       reg_names[REGNO (in_rtx)]);

            else if (REG_P (in_rtx)

                     && value <= LAST_VIRTUAL_REGISTER)

              {

                if (value == VIRTUAL_INCOMING_ARGS_REGNUM)

                  fprintf (outfile, " %d virtual-incoming-args", value);

                else if (value == VIRTUAL_STACK_VARS_REGNUM)

                  fprintf (outfile, " %d virtual-stack-vars", value);

                else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)

                  fprintf (outfile, " %d virtual-stack-dynamic", value);

                else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)

                  fprintf (outfile, " %d virtual-outgoing-args", value);

                else if (value == VIRTUAL_CFA_REGNUM)

                  fprintf (outfile, " %d virtual-cfa", value);

                else

                  fprintf (outfile, " %d virtual-reg-%d", value,

                           value-FIRST_VIRTUAL_REGISTER);

              }

            else

#endif

              if (flag_dump_unnumbered

                     && (is_insn || NOTE_P (in_rtx)))

              fputc ('#', outfile);

            else

              fprintf (outfile, " %d", value);

#ifndef GENERATOR_FILE

            if (REG_P (in_rtx) && REG_ATTRS (in_rtx))

              {

                fputs (" [", outfile);

                if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))

                  fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));

                if (REG_EXPR (in_rtx))

                  print_mem_expr (outfile, REG_EXPR (in_rtx));

                if (REG_OFFSET (in_rtx))

                  fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,

                           REG_OFFSET (in_rtx));

                fputs (" ]", outfile);

              }

#endif

            if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)

                && XINT (in_rtx, i) >= 0

                && (name = get_insn_name (XINT (in_rtx, i))) != NULL)

              fprintf (outfile, " {%s}", name);

            sawclose = 0;

          }

        break;

      /* Print NOTE_INSN names rather than integer codes.  */

      case 'n':

        fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));

        sawclose = 0;

        break;

      case 'u':

        if (XEXP (in_rtx, i) != NULL)

          {

            rtx sub = XEXP (in_rtx, i);

            enum rtx_code subc = GET_CODE (sub);

            if (GET_CODE (in_rtx) == LABEL_REF)

              {

                if (subc == NOTE

                    && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)

                  {

                    if (flag_dump_unnumbered)

                      fprintf (outfile, " [# deleted]");

                    else

                      fprintf (outfile, " [%d deleted]", INSN_UID (sub));

                    sawclose = 0;

                    break;

                  }

                if (subc != CODE_LABEL)

                  goto do_e;

              }

            if (flag_dump_unnumbered

                || (flag_dump_unnumbered_links && (i == 1 || i == 2)

                    && (INSN_P (in_rtx) || NOTE_P (in_rtx)

                        || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))

              fputs (" #", outfile);

            else

              fprintf (outfile, " %d", INSN_UID (sub));

          }

        else

          fputs (" 0", outfile);

        sawclose = 0;

        break;

      case 'b':

#ifndef GENERATOR_FILE

        if (XBITMAP (in_rtx, i) == NULL)

          fputs (" {null}", outfile);

        else

          bitmap_print (outfile, XBITMAP (in_rtx, i), " {", "}");

#endif

        sawclose = 0;

        break;

      case 't':

#ifndef GENERATOR_FILE

        dump_addr (outfile, " ", XTREE (in_rtx, i));

#endif

        break;

      case '*':

        fputs (" Unknown", outfile);

        sawclose = 0;

        break;

      case 'B':

#ifndef GENERATOR_FILE

        if (XBBDEF (in_rtx, i))

          fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);

#endif

        break;

      default:

        gcc_unreachable ();

      }

  switch (GET_CODE (in_rtx))

    {

#ifndef GENERATOR_FILE

    case MEM:

      if (__builtin_expect (final_insns_dump_p, false))

        fprintf (outfile, " [");

      else

        fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,

                 (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));

      if (MEM_EXPR (in_rtx))

        print_mem_expr (outfile, MEM_EXPR (in_rtx));

      if (MEM_OFFSET (in_rtx))

        fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,

                 INTVAL (MEM_OFFSET (in_rtx)));

      if (MEM_SIZE (in_rtx))

        fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC,

                 INTVAL (MEM_SIZE (in_rtx)));

      if (MEM_ALIGN (in_rtx) != 1)

        fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));

      if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))

        fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));

      fputc (']', outfile);

      break;

    case CONST_DOUBLE:

      if (FLOAT_MODE_P (GET_MODE (in_rtx)))

        {

          char s[60];

          real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),

                           sizeof (s), 0, 1);

          fprintf (outfile, " %s", s);

          real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),

                               sizeof (s), 0, 1);

          fprintf (outfile, " [%s]", s);

        }

      break;

#endif

    case CODE_LABEL:

      fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));

      switch (LABEL_KIND (in_rtx))

        {

          case LABEL_NORMAL: break;

          case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;

          case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;

          case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;

          default: gcc_unreachable ();

        }

      break;

    default:

      break;

    }

  if (dump_for_graph

      && (is_insn || NOTE_P (in_rtx)

          || LABEL_P (in_rtx) || BARRIER_P (in_rtx)))

    sawclose = 0;

  else

    {

      fputc (')', outfile);

      sawclose = 1;

    }

}

/* Print an rtx on the current line of FILE.  Initially indent IND

   characters.  */

void

print_inline_rtx (FILE *outf, const_rtx x, int ind)

{

  int oldsaw = sawclose;

  int oldindent = indent;

  sawclose = 0;

  indent = ind;

  outfile = outf;

  print_rtx (x);

  sawclose = oldsaw;

  indent = oldindent;

}

/* Call this function from the debugger to see what X looks like.  */

void

debug_rtx (const_rtx x)

{

  outfile = stderr;

  sawclose = 0;

  print_rtx (x);

  fprintf (stderr, "\n");

}

/* Count of rtx's to print with debug_rtx_list.

   This global exists because gdb user defined commands have no arguments.  */

int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */

/* Call this function to print list from X on.

   N is a count of the rtx's to print. Positive values print from the specified

   rtx on.  Negative values print a window around the rtx.

   EG: -5 prints 2 rtx's on either side (in addition to the specified rtx).  */

void