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_arm64;
  23 extern Target T_rv64;
  24
  25 static Target *tlist[] = {
  26         &T_amd64_sysv,
  27         &T_arm64,
  28         &T_rv64,
  29         0
  30 };
  31 static FILE *outf;
  32 static int dbg;
  33
  34 static void
  35 data(Dat *d)
  36 {
  37         if (dbg)
  38                 return;
  39         if (d->type == DEnd) {
  40                 fputs("/* end data */\n\n", outf);
  41                 freeall();
  42         }
  43         gasemitdat(d, outf);
  44 }
  45
  46 static void
  47 func(Fn *fn)
  48 {
  49         uint n;
  50
  51         if (dbg)
  52                 fprintf(stderr, "**** Function %s ****", fn->name);
  53         if (debug['P']) {
  54                 fprintf(stderr, "\n> After parsing:\n");
  55                 printfn(fn, stderr);
  56         }
  57         fillrpo(fn);
  58         fillpreds(fn);
  59         filluse(fn);
  60         memopt(fn);
  61         filluse(fn);
  62         ssa(fn);
  63         filluse(fn);
  64         ssacheck(fn);
  65         fillalias(fn);
  66         loadopt(fn);
  67         filluse(fn);
  68         ssacheck(fn);
  69         copy(fn);
  70         filluse(fn);
  71         fold(fn);
  72         T.abi(fn);
  73         fillpreds(fn);
  74         filluse(fn);
  75         T.isel(fn);
  76         fillrpo(fn);
  77         filllive(fn);
  78         fillloop(fn);
  79         fillcost(fn);
  80         spill(fn);
  81         rega(fn);
  82         fillrpo(fn);
  83         simpljmp(fn);
  84         fillpreds(fn);
  85         fillrpo(fn);
  86         assert(fn->rpo[0] == fn->start);
  87         for (n=0;; n++)
  88                 if (n == fn->nblk-1) {
  89                         fn->rpo[n]->link = 0;
  90                         break;
  91                 } else
  92                         fn->rpo[n]->link = fn->rpo[n+1];
  93         if (!dbg) {
  94                 T.emitfn(fn, outf);
  95                 gasemitfntail(fn->name, outf);
  96                 fprintf(outf, "/* end function %s */\n\n", fn->name);
  97         } else
  98                 fprintf(stderr, "\n");
  99         freeall();
 100 }
 101
 102 int
 103 main(int ac, char *av[])
 104 {
 105         Target **t;
 106         FILE *inf, *hf;
 107         char *f, *sep;
 108         int c, asmmode;
 109
 110         asmmode = Defasm;
 111         T = Deftgt;
 112         outf = stdout;
 113         while ((c = getopt(ac, av, "hd:o:G: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 'G':
 148                         if (strcmp(optarg, "e") == 0)
 149                                 asmmode = Gaself;
 150                         else if (strcmp(optarg, "m") == 0)
 151                                 asmmode = Gasmacho;
 152                         else {
 153                                 fprintf(stderr, "unknown gas flavor '%s'\n", optarg);
 154                                 exit(1);
 155                         }
 156                         break;
 157                 case 'h':
 158                 default:
 159                         hf = c != 'h' ? stderr : stdout;
 160                         fprintf(hf, "%s [OPTIONS] {file.ssa, -}\n", av[0]);
 161                         fprintf(hf, "\t%-11s prints this help\n", "-h");
 162                         fprintf(hf, "\t%-11s output to file\n", "-o file");
 163                         fprintf(hf, "\t%-11s generate for a target among:\n", "-t <target>");
 164                         fprintf(hf, "\t%-11s ", "");
 165                         for (t=tlist, sep=""; *t; t++, sep=", ")
 166                                 fprintf(hf, "%s%s", sep, (*t)->name);
 167                         fprintf(hf, "\n");
 168                         fprintf(hf, "\t%-11s generate gas (e) or osx (m) asm\n", "-G {e,m}");
 169                         fprintf(hf, "\t%-11s dump debug information\n", "-d <flags>");
 170                         exit(c != 'h');
 171                 }
 172
 173         gasinit(asmmode);
 174
 175         do {
 176                 f = av[optind];
 177                 if (!f || strcmp(f, "-") == 0) {
 178                         inf = stdin;
 179                         f = "-";
 180                 } else {
 181                         inf = fopen(f, "r");
 182                         if (!inf) {
 183                                 fprintf(stderr, "cannot open '%s'\n", f);
 184                                 exit(1);
 185                         }
 186                 }
 187                 parse(inf, f, data, func);
 188                 fclose(inf);
 189         } while (++optind < ac);
 190
 191         if (!dbg)
 192                 gasemitfin(outf);
 193
 194         exit(0);
 195 }