pike.git / src / peep.c

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pike.git/src/peep.c:1:   /*   || This file is part of Pike. For copyright information see COPYRIGHT.   || Pike is distributed under GPL, LGPL and MPL. See the file COPYING   || for more information. - || $Id: peep.c,v 1.92 2003/10/17 03:49:26 nilsson Exp $ + || $Id: peep.c,v 1.93 2003/11/19 17:19:29 grubba Exp $   */      #include "global.h"   #include "language.h"   #include "stralloc.h"   #include "dynamic_buffer.h"   #include "program.h"   #include "las.h"   #include "docode.h"   #include "main.h"
pike.git/src/peep.c:19:   #include "peep.h"   #include "dmalloc.h"   #include "stuff.h"   #include "bignum.h"   #include "opcodes.h"   #include "builtin_functions.h"   #include "constants.h"   #include "interpret.h"   #include "pikecode.h"    - RCSID("$Id: peep.c,v 1.92 2003/10/17 03:49:26 nilsson Exp $"); + RCSID("$Id: peep.c,v 1.93 2003/11/19 17:19:29 grubba Exp $");      static void asm_opt(void);      dynamic_buffer instrbuf;      #ifdef PIKE_DEBUG   static int hasarg(int opcode)   {    return instrs[opcode-F_OFFSET].flags & I_HASARG;   }
pike.git/src/peep.c:140:    p=(p_instr *)instrbuf.s.str;    p[instr].arg=arg;   }      #ifndef FLUSH_CODE_GENERATOR_STATE   #define FLUSH_CODE_GENERATOR_STATE()   #endif      /**** Bytecode Generator *****/    - void assemble(void) + INT32 assemble(int store_linenumbers)   { -  +  INT32 entry_point;    INT32 max_label=-1,tmp;    INT32 *labels, *jumps, *uses;    ptrdiff_t e, length;    p_instr *c;    int reoptimize=!(debug_options & NO_PEEP_OPTIMIZING); -  + #ifdef PIKE_PORTABLE_BYTECODE +  struct pike_tripple *tripples = NULL; + #endif /* PIKE_PORTABLE_BYTECODE */   #ifdef PIKE_DEBUG    INT32 max_pointer=-1;    int synch_depth = 0;    size_t fun_start = Pike_compiler->new_program->num_program;   #endif       c=(p_instr *)instrbuf.s.str;    length=instrbuf.s.len / sizeof(p_instr);      #ifdef PIKE_DEBUG
pike.git/src/peep.c:173: Inside #if defined(PIKE_DEBUG)
   dump_instr(c+e);    fprintf(stderr,"\n");    if (c[e].opcode == F_SYNCH_MARK) synch_depth++;    }    if (synch_depth) {    Pike_fatal("Unbalanced sync_mark/pop_sync_mark: %d\n", synch_depth);    }    }   #endif    + #ifdef PIKE_PORTABLE_BYTECODE +  /* No need to do this for constant evaluations. */ +  if (store_linenumbers) { +  struct pike_tripple *current_tripple; +  struct pike_string *previous_file = NULL; +  int previous_line = 0; +  ptrdiff_t num_linedirectives = 0; +  +  /* Count the number of F_FILE/F_LINE pseudo-ops we need to add. */ +  for (e=0; e < length; e++) { +  if (c[e].file != previous_file) { +  previous_file = c[e].file; +  num_linedirectives++; +  } +  if (c[e].line != previous_line) { +  previous_line = c[e].line; +  num_linedirectives++; +  } +  } +  +  fprintf(stderr, "length:%d directives:%d\n", length, num_linedirectives); +  +  if (!(tripples = malloc(sizeof(struct pike_tripple) * +  (length+num_linedirectives)))) { +  Pike_fatal("Failed to allocate %d tripples (%d + %d).\n", +  length+num_linedirectives, length, num_linedirectives); +  } +  previous_file = NULL; +  previous_line = 0; +  current_tripple = tripples; +  for (e = 0; e < length; e++) { +  if (c[e].file != previous_file) { +  current_tripple->opcode = F_FILENAME; +  current_tripple->arg = store_prog_string(c[e].file); +  current_tripple->arg2 = 0; +  current_tripple++; +  previous_file = c[e].file; +  } +  if (c[e].line != previous_line) { +  current_tripple->opcode = F_LINE; +  current_tripple->arg = c[e].line; +  current_tripple->arg2 = 0; +  current_tripple++; +  previous_line = c[e].line; +  } +  current_tripple->opcode = c[e].opcode; +  current_tripple->arg = c[e].arg; +  current_tripple->arg2 = c[e].arg2; +  current_tripple++; +  } + #ifdef PIKE_DEBUG +  if (current_tripple != tripples + length + num_linedirectives) { +  Pike_fatal("Tripple length mismatch %d != %d (%d + %d)\n", +  current_tripple - tripples, +  length + num_linedirectives, +  length, num_linedirectives); +  } + #endif /* PIKE_DEBUG */ +  } +  + #endif /* PIKE_PORTABLE_BYTECODE */ +     for(e=0;e<length;e++,c++) {    if(c->opcode == F_LABEL) {    if(c->arg > max_label)    max_label = c->arg;    }   #ifdef PIKE_DEBUG    else if (instrs[c->opcode - F_OFFSET].flags & I_POINTER) {    if (c->arg > max_pointer)    max_pointer = c->arg;    }
pike.git/src/peep.c:314: Inside #if 1 and #if defined(PIKE_DEBUG)
  #if 1   #ifdef PIKE_DEBUG    if (a_flag > 3)    fprintf(stderr, "Rerunning optimizer.\n");   #endif   #else /* !1 */    reoptimize=0;   #endif /* 1 */    }    +  /* Time to create the actual bytecode. */ +     c=(p_instr *)instrbuf.s.str;    length=instrbuf.s.len / sizeof(p_instr);       for(e=0;e<=max_label;e++) labels[e]=jumps[e]=-1;    -  + #ifdef ALIGN_PIKE_FUNCTION_BEGINNINGS +  while( ( (((INT32) PIKE_PC)+2) & (ALIGN_PIKE_JUMPS-1))) +  ins_byte(0); + #endif +  + #ifdef PIKE_PORTABLE_BYTECODE +  if (store_linenumbers) { +  ins_pointer(tripples); +  } else { +  ins_pointer(NULL); +  } + #endif /* PIKE_PORTABLE_BYTECODE */ +  +  entry_point = PIKE_PC; +    #ifdef PIKE_DEBUG    synch_depth = 0;   #endif    FLUSH_CODE_GENERATOR_STATE();    for(e=0;e<length;e++)    {   #ifdef PIKE_DEBUG    if (c != (((p_instr *)instrbuf.s.str)+e)) {    Pike_fatal("Instruction loop deviates. 0x%04x != 0x%04x\n",    e, DO_NOT_WARN((INT32)(c - ((p_instr *)instrbuf.s.str))));
pike.git/src/peep.c:341: Inside #if defined(PIKE_DEBUG)
   {    if (c->opcode == F_POP_SYNCH_MARK) synch_depth--;    fprintf(stderr, "===%4d %4lx %*s", c->line,    DO_NOT_WARN((unsigned long)PIKE_PC), synch_depth, "");    dump_instr(c);    fprintf(stderr,"\n");    if (c->opcode == F_SYNCH_MARK) synch_depth++;    }   #endif    -  if(store_linenumbers) +  if(store_linenumbers) {    store_linenumber(c->line, c->file); -  + #ifdef PIKE_DEBUG +  if (c->opcode < F_MAX_OPCODE) +  ADD_COMPILED(c->opcode); + #endif /* PIKE_DEBUG */ +  }       switch(c->opcode)    {    case F_NOP:    case F_NOTREACHED:    case F_START_FUNCTION:    break;    case F_ALIGN:    ins_align(c->arg);    break;
pike.git/src/peep.c:611: Inside #if defined(PIKE_DEBUG)
   DISASSEMBLE_CODE(Pike_compiler->new_program->program + fun_start, len);   #else /* !DISASSEMBLE_CODE */    {    /* FIXME: Hexdump here. */    }   #endif /* DISASSEMBLE_CODE */    }   #endif /* PIKE_DEBUG */       exit_bytecode(); +  +  return entry_point;   }      /**** Peephole optimizer ****/      int remove_clear_locals=0x7fffffff;   static int fifo_len;   static ptrdiff_t eye, len;   static p_instr *instructions;      static INLINE ptrdiff_t insopt2(int f, INT32 a, INT32 b,