main.c

   1 #include "all.h"
   2 #include "config.h"
   3 #include <ctype.h>
   4 #include <getopt.h>
   5
   6 Target T;
   7
   8 char debug['Z'+1] = {
   9         ['P'] = 0, /* parsing */
  10         ['M'] = 0, /* memory optimization */
  11         ['N'] = 0, /* ssa construction */
  12         ['C'] = 0, /* copy elimination */
  13         ['F'] = 0, /* constant folding */
  14         ['A'] = 0, /* abi lowering */
  15         ['I'] = 0, /* instruction selection */
  16         ['L'] = 0, /* liveness */
  17         ['S'] = 0, /* spilling */
  18         ['R'] = 0, /* reg. allocation */
  19 };
  20
  21 extern Target T_amd64_sysv;
  22 extern Target T_amd64_apple;
  23 extern Target T_arm64;
  24 extern Target T_rv64;
  25
  26 static Target *tlist[] = {
  27         &T_amd64_sysv,
  28         &T_amd64_apple,
  29         &T_arm64,
  30         &T_rv64,
  31         0
  32 };
  33 static FILE *outf;
  34 static int dbg;
  35
  36 static void
  37 data(Dat *d)
  38 {
  39         if (dbg)
  40                 return;
  41         if (d->type == DEnd) {
  42                 fputs("/* end data */\n\n", outf);
  43                 freeall();
  44         }
  45         emitdat(d, outf);
  46 }
  47
  48 static void
  49 func(Fn *fn)
  50 {
  51         uint n;
  52
  53         if (dbg)
  54                 fprintf(stderr, "**** Function %s ****", fn->name);
  55         if (debug['P']) {
  56                 fprintf(stderr, "\n> After parsing:\n");
  57                 printfn(fn, stderr);
  58         }
  59         fillrpo(fn);
  60         fillpreds(fn);
  61         filluse(fn);
  62         memopt(fn);
  63         filluse(fn);
  64         ssa(fn);
  65         filluse(fn);
  66         ssacheck(fn);
  67         fillalias(fn);
  68         loadopt(fn);
  69         filluse(fn);
  70         ssacheck(fn);
  71         copy(fn);
  72         filluse(fn);
  73         fold(fn);
  74         T.abi(fn);
  75         fillpreds(fn);
  76         filluse(fn);
  77         T.isel(fn);
  78         fillrpo(fn);
  79         filllive(fn);
  80         fillloop(fn);
  81         fillcost(fn);
  82         spill(fn);
  83         rega(fn);
  84         fillrpo(fn);
  85         simpljmp(fn);
  86         fillpreds(fn);
  87         fillrpo(fn);
  88         assert(fn->rpo[0] == fn->start);
  89         for (n=0;; n++)
  90                 if (n == fn->nblk-1) {
  91                         fn->rpo[n]->link = 0;
  92                         break;
  93                 } else
  94                         fn->rpo[n]->link = fn->rpo[n+1];
  95         if (!dbg) {
  96                 T.emitfn(fn, outf);
  97                 fprintf(outf, "/* end function %s */\n\n", fn->name);
  98         } else
  99                 fprintf(stderr, "\n");
 100         freeall();
 101 }
 102
 103 int
 104 main(int ac, char *av[])
 105 {
 106         Target **t;
 107         FILE *inf, *hf;
 108         char *f, *sep;
 109         int c;
 110
 111         T = Deftgt;
 112         outf = stdout;
 113         while ((c = getopt(ac, av, "hd:o:t:")) != -1)
 114                 switch (c) {
 115                 case 'd':
 116                         for (; *optarg; optarg++)
 117                                 if (isalpha(*optarg)) {
 118                                         debug[toupper(*optarg)] = 1;
 119                                         dbg = 1;
 120                                 }
 121                         break;
 122                 case 'o':
 123                         if (strcmp(optarg, "-") != 0) {
 124                                 outf = fopen(optarg, "w");
 125                                 if (!outf) {
 126                                         fprintf(stderr, "cannot open '%s'\n", optarg);
 127                                         exit(1);
 128                                 }
 129                         }
 130                         break;
 131                 case 't':
 132                         if (strcmp(optarg, "?") == 0) {
 133                                 puts(T.name);
 134                                 exit(0);
 135                         }
 136                         for (t=tlist;; t++) {
 137                                 if (!*t) {
 138                                         fprintf(stderr, "unknown target '%s'\n", optarg);
 139                                         exit(1);
 140                                 }
 141                                 if (strcmp(optarg, (*t)->name) == 0) {
 142                                         T = **t;
 143                                         break;
 144                                 }
 145                         }
 146                         break;
 147                 case 'h':
 148                 default:
 149                         hf = c != 'h' ? stderr : stdout;
 150                         fprintf(hf, "%s [OPTIONS] {file.ssa, -}\n", av[0]);
 151                         fprintf(hf, "\t%-11s prints this help\n", "-h");
 152                         fprintf(hf, "\t%-11s output to file\n", "-o file");
 153                         fprintf(hf, "\t%-11s generate for a target among:\n", "-t <target>");
 154                         fprintf(hf, "\t%-11s ", "");
 155                         for (t=tlist, sep=""; *t; t++, sep=", ") {
 156                                 fprintf(hf, "%s%s", sep, (*t)->name);
 157                                 if (*t == &Deftgt)
 158                                         fputs(" (default)", hf);
 159                         }
 160                         fprintf(hf, "\n");
 161                         fprintf(hf, "\t%-11s dump debug information\n", "-d <flags>");
 162                         exit(c != 'h');
 163                 }
 164
 165         do {
 166                 f = av[optind];
 167                 if (!f || strcmp(f, "-") == 0) {
 168                         inf = stdin;
 169                         f = "-";
 170                 } else {
 171                         inf = fopen(f, "r");
 172                         if (!inf) {
 173                                 fprintf(stderr, "cannot open '%s'\n", f);
 174                                 exit(1);
 175                         }
 176                 }
 177                 parse(inf, f, data, func);
 178                 fclose(inf);
 179         } while (++optind < ac);
 180
 181         if (!dbg)
 182                 T.emitfin(outf);
 183
 184         exit(0);
 185 }