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main.c

/*    $Id: main.c,v 1.108 2011/04/08 02:15:02 ragge Exp $   */

/*
 * Copyright (c) 2002 Anders Magnusson. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <signal.h>
#include <string.h>
#include <stdlib.h>

#include "pass1.h"
#include "pass2.h"

int sflag, nflag, oflag, kflag, pflag;
int lflag, odebug, rdebug, s2debug, udebug, x2debug;
#if !defined(MULTIPASS) || defined(PASST)
int iTflag, oTflag;
#endif
int xdebug, sdebug, gflag, c2debug, pdebug, g2debug;
#ifdef CHAR_UNSIGNED
int funsigned_char = 1;
#else
int funsigned_char = 0;
#endif
int sspflag;
int xssaflag, xtailcallflag, xtemps, xdeljumps, xdce, xinline, xccp;

int e2debug, t2debug, f2debug, b2debug;
char *prgname;

static void prtstats(void);

static void
usage(void)
{
      (void)fprintf(stderr, "usage: %s [option] [infile] [outfile]...\n",
          prgname);
      exit(1);
}

static void
segvcatch(int a)
{
      char buf[1024];
      int dummy;

      snprintf(buf, sizeof buf, "%sinternal compiler error: %s, line %d\n",
          nerrors ? "" : "major ", ftitle, lineno);
      dummy = write(STDERR_FILENO, buf, strlen(buf));
      _exit(1);
}

static void
fflags(char *str)
{
      int flagval = 1;

      if (strncmp("no-", str, 3) == 0) {
            str += 3;
            flagval = 0;
      }

      if (strcmp(str, "signed-char") == 0)
            funsigned_char = !flagval;
      else if (strcmp(str, "unsigned-char") == 0)
            funsigned_char = flagval;
      else if (strcmp(str, "stack-protector") == 0)
            sspflag = flagval;
      else if (strcmp(str, "stack-protector-all") == 0)
            sspflag = flagval;
      else if (strncmp(str, "pack-struct", 11) == 0)
            pragma_allpacked = (strlen(str) > 12 ? atoi(str+12) : 1);
      else {
            fprintf(stderr, "unrecognised option '%s'\n", str);
            usage();
      }
}

/* control multiple files */
int
main(int argc, char *argv[])
{

      int ch;

#ifdef TIMING
      struct timeval t1, t2;

      (void)gettimeofday(&t1, NULL);
#endif

      prgname = argv[0];

      while ((ch = getopt(argc, argv, "OT:VW:X:Z:f:gklm:psvwx:")) != -1)
            switch (ch) {
#if !defined(MULTIPASS) || defined(PASS1)
            case 'X':
                  while (*optarg)
                        switch (*optarg++) {
                        case 'd': ++ddebug; break; /* declarations */
                        case 'i': ++idebug; break; /* initializations */
                        case 'b': ++bdebug; break; /* buildtree */
                        case 't': ++tdebug; break; /* type match */
                        case 'e': ++edebug; break; /* pass1 exit */
                        case 'x': ++xdebug; break; /* MD code */
                        case 's': ++sdebug; break; /* inline */
                        case 'n': ++nflag; break;  /* node alloc */
                        case 'o': ++oflag; break;  /* optim */
                        case 'p': ++pdebug; break; /* prototype */
                        default:
                              fprintf(stderr, "unknown X flag '%c'\n",
                                  optarg[-1]);
                              exit(1);
                        }
#endif
                  break;
#if !defined(MULTIPASS) || defined(PASST)
            case 'T':
                  while (*optarg)
                        switch (*optarg++) {
                        case 'i': ++iTflag; break;
                        case 'o': ++oTflag; break;
                        case 'n': ++nflag; break;
                        default:
                              fprintf(stderr, "unknown T flag '%c'\n",
                                  optarg[-1]);
                              exit(1);
                        }
#endif
                  break;
#if !defined(MULTIPASS) || defined(PASS2)
            case 'Z':
                  while (*optarg)
                        switch (*optarg++) {
                        case 'f': /* instruction matching */
                              ++f2debug;
                              break;
                        case 'e': /* print tree upon pass2 enter */
                              ++e2debug;
                              break;
                        case 'o': ++odebug; break;
                        case 'r': /* register alloc/graph coloring */
                              ++rdebug;
                              break;
                        case 'b': /* basic block and SSA building */
                              ++b2debug;
                              break;
                        case 'c': /* code printout */
                              ++c2debug;
                              break;
                        case 't': ++t2debug; break;
                        case 's': /* shape matching */
                              ++s2debug;
                              break;
                        case 'u': /* Sethi-Ullman debugging */
                              ++udebug;
                              break;
                        case 'x': ++x2debug; break;
                        case 'g':  /* print flow graphs */
                              ++g2debug;
                              break;
                        case 'n': ++nflag; break;
                        default:
                              fprintf(stderr, "unknown Z flag '%c'\n",
                                  optarg[-1]);
                              exit(1);
                        }
#endif
                  break;

            case 'f': /* Language */
                  fflags(optarg);
                  break;

            case 'g': /* Debugging */
                  gflag = 1;
                  break;

            case 'k': /* PIC code */
                  ++kflag;
                  break;

            case 'l': /* Linenos */
                  ++lflag;
                  break;

            case 'm': /* Target-specific */
                  mflags(optarg);
                  break;

            case 'p': /* Profiling */
                  pflag = 1;
                  break;

            case 's': /* Statistics */
                  ++sflag;
                  break;

            case 'W': /* Enable different warnings */
                  Wflags(optarg);
                  break;

            case 'x': /* Different optimizations */
                  if (strcmp(optarg, "ssa") == 0)
                        xssaflag++;
                  else if (strcmp(optarg, "tailcall") == 0)
                        xtailcallflag++;
                  else if (strcmp(optarg, "temps") == 0)
                        xtemps++;
                  else if (strcmp(optarg, "deljumps") == 0)
                        xdeljumps++;
                  else if (strcmp(optarg, "dce") == 0)
                        xdce++;
                  else if (strcmp(optarg, "inline") == 0)
                        xinline++;
                  else if (strcmp(optarg, "ccp") == 0)
                        xccp++;
                  else
                        usage();
                  break;
            case 'v':
                  printf("ccom: %s\n", VERSSTR);
                  break;

            case '?':
            default:
                  usage();
            }
            argc -= optind;
            argv += optind;

            if (argc > 0 && strcmp(argv[0], "-") != 0) {
                  if (freopen(argv[0], "r", stdin) == NULL) {
                        fprintf(stderr, "open input file '%s':",
                            argv[0]);
                        perror(NULL);
                        exit(1);
                  }
            }
            if (argc > 1 && strcmp(argv[1], "-") != 0) {
                  if (freopen(argv[1], "w", stdout) == NULL) {
                        fprintf(stderr, "open output file '%s':",
                            argv[1]);
                        perror(NULL);
                        exit(1);
                  }
            }

      mkdope();
      signal(SIGSEGV, segvcatch);
#ifdef SIGBUS
      signal(SIGBUS, segvcatch);
#endif
      fregs = FREGS;    /* number of free registers */
      lineno = 1;
#ifdef GCC_COMPAT
      gcc_init();
#endif

      /* starts past any of the above */
      reached = 1;

      bjobcode();
#ifndef TARGET_VALIST
      {
            NODE *p = block(NAME, NIL, NIL, PTR|CHAR, NULL, 0);
            struct symtab *sp = lookup(addname("__builtin_va_list"), 0);
            p->n_sp = sp;
            defid(p, TYPEDEF);
            nfree(p);
      }
#endif
      complinit();

#ifdef STABS
      if (gflag) {
            stabs_file(argc ? argv[0] : "");
            stabs_init();
      }
#endif

      if (sspflag)
            sspinit();

      (void) yyparse();
      yyaccpt();

      if (!nerrors)
            lcommprint();

#ifdef STABS
      if (gflag)
            stabs_efile(argc ? argv[0] : "");
#endif

      ejobcode( nerrors ? 1 : 0 );

#ifdef TIMING
      (void)gettimeofday(&t2, NULL);
      t2.tv_sec -= t1.tv_sec;
      t2.tv_usec -= t1.tv_usec;
      if (t2.tv_usec < 0) {
            t2.tv_usec += 1000000;
            t2.tv_sec -= 1;
      }
      fprintf(stderr, "ccom total time: %ld s %ld us\n",
          t2.tv_sec, t2.tv_usec);
#endif

      if (sflag)
            prtstats();
      return(nerrors?1:0);

}

void
prtstats(void)
{
      extern int nametabs, namestrlen, tmpallocsize, permallocsize;
      extern int lostmem, arglistcnt, dimfuncnt, inlnodecnt, inlstatcnt;
      extern int symtabcnt, suedefcnt;

      fprintf(stderr, "Name table entries:            %d pcs\n", nametabs);
      fprintf(stderr, "Name string size:        %d B\n", namestrlen);
      fprintf(stderr, "Permanent allocated memory:    %d B\n", permallocsize);
      fprintf(stderr, "Temporary allocated memory:    %d B\n", tmpallocsize);
      fprintf(stderr, "Lost memory:             %d B\n", lostmem);
      fprintf(stderr, "Argument list unions:          %d pcs\n", arglistcnt);
      fprintf(stderr, "Dimension/function unions:     %d pcs\n", dimfuncnt);
      fprintf(stderr, "Struct/union/enum blocks:      %d pcs\n", suedefcnt);
      fprintf(stderr, "Inline node count:       %d pcs\n", inlnodecnt);
      fprintf(stderr, "Inline control blocks:         %d pcs\n", inlstatcnt);
      fprintf(stderr, "Permanent symtab entries:      %d pcs\n", symtabcnt);
}

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