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- /* Copyright (c) 1988,1989 by Sozobon, Limited. Author: Tony Andrews
- *
- * Permission is granted to anyone to use this software for any purpose
- * on any computer system, and to redistribute it freely, with the
- * following restrictions:
- * 1) No charge may be made other than reasonable charges for reproduction.
- * 2) Modified versions must be clearly marked as such.
- * 3) The authors are not responsible for any harmful consequences
- * of using this software, even if they result from defects in it.
- */
- #include "top.h"
-
- FILE *ifp, *ofp; /* input/output file pointers */
-
- #ifndef MINIX
- long _STKSIZ = 32768L; /* need mucho stack for recursion */
- #endif
-
- /*
- * Options
- */
- bool debug = FALSE;
- bool do_brev = TRUE; /* branch reversals enabled */
- bool do_peep = TRUE; /* peephole optimizations enabled */
- bool do_regs = TRUE; /* do "registerizing" */
- bool do_lrot = TRUE; /* do loop rotations */
- bool verbose = FALSE;
-
- /*
- * Optimization statistics (use -v to print)
- */
- int s_bdel = 0; /* branches deleted */
- int s_badd = 0; /* branches added */
- int s_brev = 0; /* branch reversals */
- int s_lrot = 0; /* loop rotations */
- int s_peep1 = 0; /* 1 instruction peephole changes */
- int s_peep2 = 0; /* 2 instruction peephole changes */
- int s_peep3 = 0; /* 3 instruction peephole changes */
- int s_idel = 0; /* instructions deleted */
- int s_reg = 0; /* variables "registerized" */
-
- #define TMPFILE "top_tmp.$$$" /* temporary file name */
- int use_temp = FALSE; /* using temporary file */
-
- char *Version =
- "top Version 1.20 Copyright (c) 1988,1989 by Sozobon, Limited.";
-
- usage()
- {
- fprintf(stderr, "usage: top [-dvblpr] infile [outfile]\n");
- exit(1);
- }
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- FILE *fopen();
- register char *s;
-
- while (argc > 1 && argv[1][0] == '-') {
- for (s = &argv[1][1]; *s ;s++) {
- switch (*s) {
- case 'd':
- debug = TRUE;
- break;
- case 'b':
- do_brev = FALSE;
- break;
- case 'p':
- do_peep = FALSE;
- break;
- case 'r':
- do_regs = FALSE;
- break;
- case 'l':
- do_lrot = FALSE;
- break;
- case 'v':
- fprintf(stderr, "%s\n", Version);
- verbose = TRUE;
- break;
- case 'O':
- /*
- * When options are received from 'cc' they
- * look like "-Oxxx", so just ignore the 'O'.
- */
- break;
- default:
- usage();
- break;
- }
- }
- argv++;
- argc--;
- }
-
- if (argc > 3)
- usage();
-
- if (argc > 1) {
- if (strcmp(argv[1], "-") == 0)
- ifp = stdin;
- else if ((ifp = fopen(argv[1], "r")) == NULL) {
- fprintf(stderr, "top: can't open input file '%s'\n",
- argv[1]);
- exit(1);
- }
- if (argc > 2) {
- if (strcmp(argv[2], "-") == 0)
- ofp = stdout;
- else if ((ofp = fopen(argv[2], "w")) == NULL) {
- fprintf(stderr, "top: can't open output file '%s'\n",
- argv[2]);
- exit(1);
- }
- } else {
- if ((ofp = fopen(TMPFILE, "w")) == NULL) {
- fprintf(stderr, "top: can't create temp file\n");
- exit(1);
- }
- use_temp = TRUE;
- }
- } else
- usage();
-
- dofile();
-
- if (verbose) {
- if (do_peep) {
- fprintf(stderr, "Peephole changes (1): %4d\n", s_peep1);
- fprintf(stderr, "Peephole changes (2): %4d\n", s_peep2);
- fprintf(stderr, "Peephole changes (3): %4d\n", s_peep3);
- fprintf(stderr, "Instructions deleted: %4d\n", s_idel);
- }
- if (do_regs)
- fprintf(stderr, "Variables registered: %4d\n", s_reg);
- if (do_lrot)
- fprintf(stderr, "Loop rotations : %4d\n", s_lrot);
- if (do_brev)
- fprintf(stderr, "Branch reversals : %4d\n", s_brev);
- fprintf(stderr, "Branches removed : %4d\n", s_bdel - s_badd);
- }
-
- /*
- * If we're overwriting the original file, remove the old
- * version, and rename the temp file to the old name.
- */
- if (use_temp) {
- remove(argv[1]);
- rename(TMPFILE, argv[1]);
- }
-
- exit(0);
- }
-
- dofile()
- {
- if (!readline())
- return;
-
- while (dofunc())
- ;
- }
-