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_arm64_apple;
  25 extern Target T_rv64;
  26
  27 static Target *tlist[] = {
  28         &T_amd64_sysv,
  29         &T_amd64_apple,
  30         &T_arm64,
  31         &T_arm64_apple,
  32         &T_rv64,
  33         0
  34 };
  35 static FILE *outf;
  36 static int dbg;
  37
  38 static void
  39 data(Dat *d)
  40 {
  41         if (dbg)
  42                 return;
  43         emitdat(d, outf);
  44         if (d->type == DEnd) {
  45                 fputs("/* end data */\n\n", outf);
  46                 freeall();
  47         }
  48 }
  49
  50 static void
  51 func(Fn *fn)
  52 {
  53         uint n;
  54
  55         if (dbg)
  56                 fprintf(stderr, "**** Function %s ****", fn->name);
  57         if (debug['P']) {
  58                 fprintf(stderr, "\n> After parsing:\n");
  59                 printfn(fn, stderr);
  60         }
  61         T.abi0(fn);
  62         fillrpo(fn);
  63         fillpreds(fn);
  64         filluse(fn);
  65         promote(fn);
  66         filluse(fn);
  67         ssa(fn);
  68         filluse(fn);
  69         ssacheck(fn);
  70         fillalias(fn);
  71         loadopt(fn);
  72         filluse(fn);
  73         fillalias(fn);
  74         coalesce(fn);
  75         filluse(fn);
  76         ssacheck(fn);
  77         copy(fn);
  78         filluse(fn);
  79         fold(fn);
  80         T.abi1(fn);
  81         fillpreds(fn);
  82         filluse(fn);
  83         T.isel(fn);
  84         fillrpo(fn);
  85         filllive(fn);
  86         fillloop(fn);
  87         fillcost(fn);
  88         spill(fn);
  89         rega(fn);
  90         fillrpo(fn);
  91         simpljmp(fn);
  92         fillpreds(fn);
  93         fillrpo(fn);
  94         assert(fn->rpo[0] == fn->start);
  95         for (n=0;; n++)
  96                 if (n == fn->nblk-1) {
  97                         fn->rpo[n]->link = 0;
  98                         break;
  99                 } else
 100                         fn->rpo[n]->link = fn->rpo[n+1];
 101         if (!dbg) {
 102                 T.emitfn(fn, outf);
 103                 fprintf(outf, "/* end function %s */\n\n", fn->name);
 104         } else
 105                 fprintf(stderr, "\n");
 106         freeall();
 107 }
 108
 109 int
 110 main(int ac, char *av[])
 111 {
 112         Target **t;
 113         FILE *inf, *hf;
 114         char *f, *sep;
 115         int c;
 116
 117         T = Deftgt;
 118         outf = stdout;
 119         while ((c = getopt(ac, av, "hd:o:t:")) != -1)
 120                 switch (c) {
 121                 case 'd':
 122                         for (; *optarg; optarg++)
 123                                 if (isalpha(*optarg)) {
 124                                         debug[toupper(*optarg)] = 1;
 125                                         dbg = 1;
 126                                 }
 127                         break;
 128                 case 'o':
 129                         if (strcmp(optarg, "-") != 0) {
 130                                 outf = fopen(optarg, "w");
 131                                 if (!outf) {
 132                                         fprintf(stderr, "cannot open '%s'\n", optarg);
 133                                         exit(1);
 134                                 }
 135                         }
 136                         break;
 137                 case 't':
 138                         if (strcmp(optarg, "?") == 0) {
 139                                 puts(T.name);
 140                                 exit(0);
 141                         }
 142                         for (t=tlist;; t++) {
 143                                 if (!*t) {
 144                                         fprintf(stderr, "unknown target '%s'\n", optarg);
 145                                         exit(1);
 146                                 }
 147                                 if (strcmp(optarg, (*t)->name) == 0) {
 148                                         T = **t;
 149                                         break;
 150                                 }
 151                         }
 152                         break;
 153                 case 'h':
 154                 default:
 155                         hf = c != 'h' ? stderr : stdout;
 156                         fprintf(hf, "%s [OPTIONS] {file.ssa, -}\n", av[0]);
 157                         fprintf(hf, "\t%-11s prints this help\n", "-h");
 158                         fprintf(hf, "\t%-11s output to file\n", "-o file");
 159                         fprintf(hf, "\t%-11s generate for a target among:\n", "-t <target>");
 160                         fprintf(hf, "\t%-11s ", "");
 161                         for (t=tlist, sep=""; *t; t++, sep=", ") {
 162                                 fprintf(hf, "%s%s", sep, (*t)->name);
 163                                 if (*t == &Deftgt)
 164                                         fputs(" (default)", hf);
 165                         }
 166                         fprintf(hf, "\n");
 167                         fprintf(hf, "\t%-11s dump debug information\n", "-d <flags>");
 168                         exit(c != 'h');
 169                 }
 170
 171         do {
 172                 f = av[optind];
 173                 if (!f || strcmp(f, "-") == 0) {
 174                         inf = stdin;
 175                         f = "-";
 176                 } else {
 177                         inf = fopen(f, "r");
 178                         if (!inf) {
 179                                 fprintf(stderr, "cannot open '%s'\n", f);
 180                                 exit(1);
 181                         }
 182                 }
 183                 parse(inf, f, data, func);
 184                 fclose(inf);
 185         } while (++optind < ac);
 186
 187         if (!dbg)
 188                 T.emitfin(outf);
 189
 190         exit(0);
 191 }