remove VIRTUAL tag, PERL_OBJECT doesn't need it anymore
[p5sagit/p5-mst-13.2.git] / op.c
diff --git a/op.c b/op.c
index 21df282..cb868a4 100644 (file)
--- a/op.c
+++ b/op.c
 #include "EXTERN.h"
 #define PERL_IN_OP_C
 #include "perl.h"
-
-#ifdef PERL_OBJECT
-#define CHECKCALL this->*PL_check
-#else
-#define CHECKCALL *PL_check
-#endif              
+#include "keywords.h"
 
 /* #define PL_OP_SLAB_ALLOC */
-                                                            
+
+/* XXXXXX testing */
+#define OP_REFCNT_LOCK         NOOP
+#define OP_REFCNT_UNLOCK       NOOP
+#define OpREFCNT_set(o,n)      NOOP
+#define OpREFCNT_dec(o)                0
+
 #ifdef PL_OP_SLAB_ALLOC 
 #define SLAB_SIZE 8192
 static char    *PL_OpPtr  = NULL;
@@ -57,7 +58,7 @@ S_Slab_Alloc(pTHX_ int m, size_t sz)
      ? ( op_free((OP*)o),                                      \
         Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]),    \
         Nullop )                                               \
-     : (CHECKCALL[type])(aTHX_ (OP*)o))
+     : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
 
 #define PAD_MAX 999999999
 
@@ -102,30 +103,9 @@ S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
 STATIC void
 S_no_bareword_allowed(pTHX_ OP *o)
 {
-    Perl_warn(aTHX_ "Bareword \"%s\" not allowed while \"strict subs\" in use",
-         SvPV_nolen(cSVOPo->op_sv));
-    ++PL_error_count;
-}
-
-void
-Perl_assertref(pTHX_ OP *o)
-{
-    int type = o->op_type;
-    if (type != OP_AELEM && type != OP_HELEM && type != OP_GELEM) {
-       yyerror(Perl_form(aTHX_ "Can't use subscript on %s", PL_op_desc[type]));
-       if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV) {
-           dTHR;
-           SV *msg = sv_2mortal(
-                       Perl_newSVpvf(aTHX_ "(Did you mean $ or @ instead of %c?)\n",
-                                type == OP_ENTERSUB ? '&' : '%'));
-           if (PL_in_eval & EVAL_WARNONLY)
-               Perl_warn(aTHX_ "%_", msg);
-           else if (PL_in_eval)
-               sv_catsv(GvSV(PL_errgv), msg);
-           else
-               PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
-       }
-    }
+    qerror(Perl_mess(aTHX_
+                    "Bareword \"%s\" not allowed while \"strict subs\" in use",
+                    SvPV_nolen(cSVOPo->op_sv)));
 }
 
 /* "register" allocation */
@@ -138,9 +118,10 @@ Perl_pad_allocmy(pTHX_ char *name)
     SV *sv;
 
     if (!(
+       PL_in_my == KEY_our ||
        isALPHA(name[1]) ||
        (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
-       name[1] == '_' && (int)strlen(name) > 2))
+       name[1] == '_' && (int)strlen(name) > 2 ))
     {
        if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
            /* 1999-02-27 mjd@plover.com */
@@ -172,8 +153,10 @@ Perl_pad_allocmy(pTHX_ char *name)
                && strEQ(name, SvPVX(sv)))
            {
                Perl_warner(aTHX_ WARN_UNSAFE,
-                       "\"my\" variable %s masks earlier declaration in same %s", 
-                       name, (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
+                       "\"%s\" variable %s masks earlier declaration in same %s", 
+                       (PL_in_my == KEY_our ? "our" : "my"),
+                       name,
+                       (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
                break;
            }
        }
@@ -191,6 +174,8 @@ Perl_pad_allocmy(pTHX_ char *name)
        SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
        PL_sv_objcount++;
     }
+    if (PL_in_my == KEY_our)
+       SvFLAGS(sv) |= SVpad_OUR;
     av_store(PL_comppad_name, off, sv);
     SvNVX(sv) = (NV)PAD_MAX;
     SvIVX(sv) = 0;                     /* Not yet introduced--see newSTATEOP */
@@ -258,6 +243,8 @@ S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
                    SvNVX(namesv) = (NV)PL_curcop->cop_seq;
                    SvIVX(namesv) = PAD_MAX;    /* A ref, intro immediately */
                    SvFAKE_on(namesv);          /* A ref, not a real var */
+                   if (SvFLAGS(sv) & SVpad_OUR)/* An "our" variable */
+                       SvFLAGS(namesv) |= SVpad_OUR;
                    if (SvOBJECT(sv)) {         /* A typed var */
                        SvOBJECT_on(namesv);
                        (void)SvUPGRADE(namesv, SVt_PVMG);
@@ -382,7 +369,7 @@ Perl_pad_findmy(pTHX_ char *name)
              seq > I_32(SvNVX(sv)))) &&
            strEQ(SvPVX(sv), name))
        {
-           if (SvIVX(sv))
+           if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
                return (PADOFFSET)off;
            pendoff = off;      /* this pending def. will override import */
        }
@@ -469,12 +456,14 @@ Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
     SvFLAGS(sv) |= tmptype;
     PL_curpad = AvARRAY(PL_comppad);
 #ifdef USE_THREADS
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
-                         (unsigned long) thr, (unsigned long) PL_curpad,
+    DEBUG_X(PerlIO_printf(Perl_debug_log,
+                         "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
+                         PTR2UV(thr), PTR2UV(PL_curpad),
                          (long) retval, PL_op_name[optype]));
 #else
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
-                         (unsigned long) PL_curpad,
+    DEBUG_X(PerlIO_printf(Perl_debug_log,
+                         "Pad 0x%"UVxf" alloc %ld for %s\n",
+                         PTR2UV(PL_curpad),
                          (long) retval, PL_op_name[optype]));
 #endif /* USE_THREADS */
     return (PADOFFSET)retval;
@@ -485,13 +474,14 @@ Perl_pad_sv(pTHX_ PADOFFSET po)
 {
     dTHR;
 #ifdef USE_THREADS
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
-                         (unsigned long) thr, (unsigned long) PL_curpad, po));
+    DEBUG_X(PerlIO_printf(Perl_debug_log,
+                         "0x%"UVxf" Pad 0x%"UVxf" sv %d\n",
+                         PTR2UV(thr), PTR2UV(PL_curpad), po));
 #else
     if (!po)
        Perl_croak(aTHX_ "panic: pad_sv po");
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
-                         (unsigned long) PL_curpad, po));
+    DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %d\n",
+                         PTR2UV(PL_curpad), po));
 #endif /* USE_THREADS */
     return PL_curpad[po];              /* eventually we'll turn this into a macro */
 }
@@ -507,11 +497,12 @@ Perl_pad_free(pTHX_ PADOFFSET po)
     if (!po)
        Perl_croak(aTHX_ "panic: pad_free po");
 #ifdef USE_THREADS
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
-                         (unsigned long) thr, (unsigned long) PL_curpad, po));
+    DEBUG_X(PerlIO_printf(Perl_debug_log,
+                         "0x%"UVxf" Pad 0x%"UVxf" free %d\n",
+                         PTR2UV(thr), PTR2UV(PL_curpad), po));
 #else
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
-                         (unsigned long) PL_curpad, po));
+    DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %d\n",
+                         PTR2UV(PL_curpad), po));
 #endif /* USE_THREADS */
     if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
        SvPADTMP_off(PL_curpad[po]);
@@ -528,11 +519,12 @@ Perl_pad_swipe(pTHX_ PADOFFSET po)
     if (!po)
        Perl_croak(aTHX_ "panic: pad_swipe po");
 #ifdef USE_THREADS
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
-                         (unsigned long) thr, (unsigned long) PL_curpad, po));
+    DEBUG_X(PerlIO_printf(Perl_debug_log,
+                         "0x%"UVxf" Pad 0x%"UVxf" swipe %d\n",
+                         PTR2UV(thr), PTR2UV(PL_curpad), po));
 #else
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
-                         (unsigned long) PL_curpad, po));
+    DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %d\n",
+                         PTR2UV(PL_curpad), po));
 #endif /* USE_THREADS */
     SvPADTMP_off(PL_curpad[po]);
     PL_curpad[po] = NEWSV(1107,0);
@@ -557,11 +549,12 @@ Perl_pad_reset(pTHX)
     if (AvARRAY(PL_comppad) != PL_curpad)
        Perl_croak(aTHX_ "panic: pad_reset curpad");
 #ifdef USE_THREADS
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
-                         (unsigned long) thr, (unsigned long) PL_curpad));
+    DEBUG_X(PerlIO_printf(Perl_debug_log,
+                         "0x%"UVxf" Pad 0x%"UVxf" reset\n",
+                         PTR2UV(thr), PTR2UV(PL_curpad)));
 #else
-    DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
-                         (unsigned long) PL_curpad));
+    DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
+                         PTR2UV(PL_curpad)));
 #endif /* USE_THREADS */
     if (!PL_tainting) {        /* Can't mix tainted and non-tainted temporaries. */
        for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
@@ -633,7 +626,7 @@ Perl_find_threadsv(pTHX_ const char *name)
        default:
            sv_magic(sv, 0, 0, name, 1); 
        }
-       DEBUG_S(PerlIO_printf(PerlIO_stderr(),
+       DEBUG_S(PerlIO_printf(Perl_error_log,
                              "find_threadsv: new SV %p for $%s%c\n",
                              sv, (*name < 32) ? "^" : "",
                              (*name < 32) ? toCTRL(*name) : *name));
@@ -648,32 +641,73 @@ void
 Perl_op_free(pTHX_ OP *o)
 {
     register OP *kid, *nextkid;
+    OPCODE type;
 
     if (!o || o->op_seq == (U16)-1)
        return;
 
+    if (o->op_private & OPpREFCOUNTED) {
+       switch (o->op_type) {
+       case OP_LEAVESUB:
+       case OP_LEAVESUBLV:
+       case OP_LEAVEEVAL:
+       case OP_LEAVE:
+       case OP_SCOPE:
+       case OP_LEAVEWRITE:
+           OP_REFCNT_LOCK;
+           if (OpREFCNT_dec(o)) {
+               OP_REFCNT_UNLOCK;
+               return;
+           }
+           OP_REFCNT_UNLOCK;
+           break;
+       default:
+           break;
+       }
+    }
+
     if (o->op_flags & OPf_KIDS) {
        for (kid = cUNOPo->op_first; kid; kid = nextkid) {
            nextkid = kid->op_sibling; /* Get before next freeing kid */
            op_free(kid);
        }
     }
+    type = o->op_type;
+    if (type == OP_NULL)
+       type = o->op_targ;
+
+    /* COP* is not cleared by op_clear() so that we may track line
+     * numbers etc even after null() */
+    if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
+       cop_free((COP*)o);
+
+    op_clear(o);
 
+#ifdef PL_OP_SLAB_ALLOC
+    if ((char *) o == PL_OpPtr)
+     {
+     }
+#else
+    Safefree(o);
+#endif
+}
+
+STATIC void
+S_op_clear(pTHX_ OP *o)
+{
     switch (o->op_type) {
-    case OP_NULL:
-       o->op_targ = 0; /* Was holding old type, if any. */
-       break;
-    case OP_ENTEREVAL:
-       o->op_targ = 0; /* Was holding hints. */
+    case OP_NULL:      /* Was holding old type, if any. */
+    case OP_ENTEREVAL: /* Was holding hints. */
+#ifdef USE_THREADS
+    case OP_THREADSV:  /* Was holding index into thr->threadsv AV. */
+#endif
+       o->op_targ = 0;
        break;
 #ifdef USE_THREADS
     case OP_ENTERITER:
        if (!(o->op_flags & OPf_SPECIAL))
            break;
        /* FALL THROUGH */
-    case OP_THREADSV:
-       o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
-       break;
 #endif /* USE_THREADS */
     default:
        if (!(o->op_flags & OPf_REF)
@@ -683,17 +717,12 @@ Perl_op_free(pTHX_ OP *o)
     case OP_GVSV:
     case OP_GV:
     case OP_AELEMFAST:
-       SvREFCNT_dec(cGVOPo->op_gv);
-       break;
-    case OP_SETSTATE:
-       o->op_targ = 0; /* Was holding old type. */
-       /* FALL THROUGH */
-    case OP_NEXTSTATE:
-    case OP_DBSTATE:
-       cop_free((COP*)o);
+       SvREFCNT_dec(cSVOPo->op_sv);
+       cSVOPo->op_sv = Nullsv;
        break;
     case OP_CONST:
        SvREFCNT_dec(cSVOPo->op_sv);
+       cSVOPo->op_sv = Nullsv;
        break;
     case OP_GOTO:
     case OP_NEXT:
@@ -703,38 +732,36 @@ Perl_op_free(pTHX_ OP *o)
            break;
        /* FALL THROUGH */
     case OP_TRANS:
-       if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
+       if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
            SvREFCNT_dec(cSVOPo->op_sv);
-       else
+           cSVOPo->op_sv = Nullsv;
+       }
+       else {
            Safefree(cPVOPo->op_pv);
+           cPVOPo->op_pv = Nullch;
+       }
        break;
     case OP_SUBST:
        op_free(cPMOPo->op_pmreplroot);
+       cPMOPo->op_pmreplroot = Nullop;
        /* FALL THROUGH */
     case OP_PUSHRE:
     case OP_MATCH:
     case OP_QR:
        ReREFCNT_dec(cPMOPo->op_pmregexp);
+       cPMOPo->op_pmregexp = (REGEXP*)NULL;
        break;
     }
 
     if (o->op_targ > 0)
        pad_free(o->op_targ);
-
-#ifdef PL_OP_SLAB_ALLOC
-    if ((char *) o == PL_OpPtr)
-     {
-     }
-#else
-    Safefree(o);
-#endif
 }
 
 STATIC void
 S_cop_free(pTHX_ COP* cop)
 {
     Safefree(cop->cop_label);
-    SvREFCNT_dec(cop->cop_filegv);
+    SvREFCNT_dec(CopFILEGV(cop));
     if (! specialWARN(cop->cop_warnings))
        SvREFCNT_dec(cop->cop_warnings);
 }
@@ -742,10 +769,9 @@ S_cop_free(pTHX_ COP* cop)
 STATIC void
 S_null(pTHX_ OP *o)
 {
-    if (o->op_type == OP_NEXTSTATE || o->op_type == OP_DBSTATE)
-       cop_free((COP*)o);
-    if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
-       pad_free(o->op_targ);
+    if (o->op_type == OP_NULL)
+       return;
+    op_clear(o);
     o->op_targ = o->op_type;
     o->op_type = OP_NULL;
     o->op_ppaddr = PL_ppaddr[OP_NULL];
@@ -886,9 +912,12 @@ Perl_scalarvoid(pTHX_ OP *o)
     SV* sv;
     U8 want;
 
-    if (o->op_type == OP_NEXTSTATE || o->op_type == OP_DBSTATE ||
-       (o->op_type == OP_NULL &&
-        (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)))
+    if (o->op_type == OP_NEXTSTATE
+       || o->op_type == OP_SETSTATE
+       || o->op_type == OP_DBSTATE
+       || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
+                                     || o->op_targ == OP_SETSTATE
+                                     || o->op_targ == OP_DBSTATE)))
     {
        dTHR;
        PL_curcop = (COP*)o;            /* for warning below */
@@ -1018,8 +1047,7 @@ Perl_scalarvoid(pTHX_ OP *o)
                }
            }
        }
-       null(o);                /* don't execute a constant */
-       SvREFCNT_dec(sv);       /* don't even remember it */
+       null(o);                /* don't execute or even remember it */
        break;
 
     case OP_POSTINC:
@@ -1251,6 +1279,91 @@ Perl_mod(pTHX_ OP *o, I32 type)
            null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
            break;
        }
+       else {                          /* lvalue subroutine call */
+           o->op_private |= OPpLVAL_INTRO;
+           if (type == OP_GREPSTART || type == OP_ENTERSUB) {
+               /* Backward compatibility mode: */
+               o->op_private |= OPpENTERSUB_INARGS;
+               break;
+           }
+           else {                      /* Compile-time error message: */
+               OP *kid = cUNOPo->op_first;
+               CV *cv;
+               OP *okid;
+
+               if (kid->op_type == OP_PUSHMARK)
+                   goto skip_kids;
+               if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
+                   Perl_croak(aTHX_
+                              "panic: unexpected lvalue entersub "
+                              "args: type/targ %ld:%ld",
+                              (long)kid->op_type,kid->op_targ);
+               kid = kLISTOP->op_first;
+             skip_kids:
+               while (kid->op_sibling)
+                   kid = kid->op_sibling;
+               if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
+                   /* Indirect call */
+                   if (kid->op_type == OP_METHOD_NAMED
+                       || kid->op_type == OP_METHOD)
+                   {
+                       OP *newop;
+
+                       if (kid->op_sibling || kid->op_next != kid) {
+                           yyerror("panic: unexpected optree near method call");
+                           break;
+                       }
+                       
+                       NewOp(1101, newop, 1, OP);
+                       newop->op_type = OP_RV2CV;
+                       newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
+                       newop->op_next = newop;
+                       kid->op_sibling = newop;
+                       newop->op_private |= OPpLVAL_INTRO;
+                       break;
+                   }
+                   
+                   if (kid->op_type != OP_RV2CV)
+                       Perl_croak(aTHX_
+                                  "panic: unexpected lvalue entersub "
+                                  "entry via type/targ %ld:%ld",
+                                  (long)kid->op_type,kid->op_targ);
+                   kid->op_private |= OPpLVAL_INTRO;
+                   break;      /* Postpone until runtime */
+               }
+               
+               okid = kid;             
+               kid = kUNOP->op_first;
+               if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
+                   kid = kUNOP->op_first;
+               if (kid->op_type == OP_NULL)            
+                   Perl_croak(aTHX_
+                              "Unexpected constant lvalue entersub "
+                              "entry via type/targ %ld:%ld",
+                              (long)kid->op_type,kid->op_targ);
+               if (kid->op_type != OP_GV) {
+                   /* Restore RV2CV to check lvalueness */
+                 restore_2cv:
+                   if (kid->op_next && kid->op_next != kid) { /* Happens? */
+                       okid->op_next = kid->op_next;
+                       kid->op_next = okid;
+                   }
+                   else
+                       okid->op_next = Nullop;
+                   okid->op_type = OP_RV2CV;
+                   okid->op_targ = 0;
+                   okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
+                   okid->op_private |= OPpLVAL_INTRO;
+                   break;
+               }
+               
+               cv = GvCV((GV*)kSVOP->op_sv);
+               if (!cv) 
+                   goto restore_2cv;
+               if (CvLVALUE(cv))
+                   break;
+           }
+       }
        /* FALL THROUGH */
     default:
       nomod:
@@ -1259,7 +1372,10 @@ Perl_mod(pTHX_ OP *o, I32 type)
            break;
        yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
                     (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
-                     ? "do block" : PL_op_desc[o->op_type]),
+                     ? "do block"
+                     : (o->op_type == OP_ENTERSUB
+                       ? "non-lvalue subroutine call"
+                       : PL_op_desc[o->op_type])),
                     type ? PL_op_desc[type] : "local"));
        return o;
 
@@ -1588,8 +1704,60 @@ Perl_ref(pTHX_ OP *o, I32 type)
 
 }
 
-OP *
-Perl_my(pTHX_ OP *o)
+STATIC OP *
+S_dup_attrlist(pTHX_ OP *o)
+{
+    OP *rop = Nullop;
+
+    /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
+     * where the first kid is OP_PUSHMARK and the remaining ones
+     * are OP_CONST.  We need to push the OP_CONST values.
+     */
+    if (o->op_type == OP_CONST)
+       rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
+    else {
+       assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
+       for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
+           if (o->op_type == OP_CONST)
+               rop = append_elem(OP_LIST, rop,
+                                 newSVOP(OP_CONST, o->op_flags,
+                                         SvREFCNT_inc(cSVOPo->op_sv)));
+       }
+    }
+    return rop;
+}
+
+STATIC void
+S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
+{
+    OP *modname;       /* for 'use' */
+    SV *stashsv;
+
+    /* fake up C<use attributes $pkg,$rv,@attrs> */
+    ENTER;             /* need to protect against side-effects of 'use' */
+    SAVEINT(PL_expect);
+    if (stash && HvNAME(stash))
+       stashsv = newSVpv(HvNAME(stash), 0);
+    else
+       stashsv = &PL_sv_no;
+#define ATTRSMODULE "attributes"
+    modname = newSVOP(OP_CONST, 0,
+                     newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1));
+    modname->op_private |= OPpCONST_BARE;
+    /* that flag is required to make 'use' work right */
+    utilize(1, start_subparse(FALSE, 0),
+           Nullop, /* version */
+           modname,
+           prepend_elem(OP_LIST,
+                        newSVOP(OP_CONST, 0, stashsv),
+                        prepend_elem(OP_LIST,
+                                     newSVOP(OP_CONST, 0, newRV(target)),
+                                     dup_attrlist(attrs))));
+    LEAVE;
+}
+
+STATIC OP *
+S_my_kid(pTHX_ OP *o, OP *attrs)
 {
     OP *kid;
     I32 type;
@@ -1600,9 +1768,13 @@ Perl_my(pTHX_ OP *o)
     type = o->op_type;
     if (type == OP_LIST) {
        for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
-           my(kid);
+           my_kid(kid, attrs);
     } else if (type == OP_UNDEF) {
        return o;
+    } else if (type == OP_RV2SV ||     /* "our" declaration */
+              type == OP_RV2AV ||
+              type == OP_RV2HV) { /* XXX does this let anything illegal in? */
+       return o;
     } else if (type != OP_PADSV &&
             type != OP_PADAV &&
             type != OP_PADHV &&
@@ -1611,12 +1783,44 @@ Perl_my(pTHX_ OP *o)
        yyerror(Perl_form(aTHX_ "Can't declare %s in my", PL_op_desc[o->op_type]));
        return o;
     }
+    else if (attrs && type != OP_PUSHMARK) {
+       HV *stash;
+       SV *padsv;
+       SV **namesvp;
+
+       /* check for C<my Dog $spot> when deciding package */
+       namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
+       if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
+           stash = SvSTASH(*namesvp);
+       else
+           stash = PL_curstash;
+       padsv = PAD_SV(o->op_targ);
+       apply_attrs(stash, padsv, attrs);
+    }
     o->op_flags |= OPf_MOD;
     o->op_private |= OPpLVAL_INTRO;
     return o;
 }
 
 OP *
+Perl_my_attrs(pTHX_ OP *o, OP *attrs)
+{
+    if (o->op_flags & OPf_PARENS)
+       list(o);
+    PL_in_my = FALSE;
+    PL_in_my_stash = Nullhv;
+    if (attrs)
+       SAVEFREEOP(attrs);
+    return my_kid(o, attrs);
+}
+
+OP *
+Perl_my(pTHX_ OP *o)
+{
+    return my_kid(o, Nullop);
+}
+
+OP *
 Perl_sawparens(pTHX_ OP *o)
 {
     if (o)
@@ -1638,9 +1842,9 @@ Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
       char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
                             right->op_type == OP_TRANS)
                            ? right->op_type : OP_MATCH];
-      char *sample = ((left->op_type == OP_RV2AV ||
-                       left->op_type == OP_PADAV)
-                      ? "@array" : "%hash");
+      const char *sample = ((left->op_type == OP_RV2AV ||
+                            left->op_type == OP_PADAV)
+                           ? "@array" : "%hash");
       Perl_warner(aTHX_ WARN_UNSAFE,
              "Applying %s to %s will act on scalar(%s)", 
              desc, sample, sample);
@@ -1689,13 +1893,8 @@ Perl_scope(pTHX_ OP *o)
                o->op_type = OP_SCOPE;
                o->op_ppaddr = PL_ppaddr[OP_SCOPE];
                kid = ((LISTOP*)o)->op_first;
-               if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
-                   if (kid->op_targ > 0)
-                       pad_free(kid->op_targ);
-                   kid->op_targ = kid->op_type;
-                   kid->op_type = OP_SETSTATE;
-                   kid->op_ppaddr = PL_ppaddr[OP_SETSTATE];
-               }
+               if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
+                   null(kid);
            }
            else
                o = newLISTOP(OP_SCOPE, 0, o, Nullop);
@@ -1784,6 +1983,8 @@ Perl_newPROG(pTHX_ OP *o)
                               ((PL_in_eval & EVAL_KEEPERR)
                                ? OPf_SPECIAL : 0), o);
        PL_eval_start = linklist(PL_eval_root);
+       PL_eval_root->op_private |= OPpREFCOUNTED;
+       OpREFCNT_set(PL_eval_root, 1);
        PL_eval_root->op_next = 0;
        peep(PL_eval_start);
     }
@@ -1793,6 +1994,8 @@ Perl_newPROG(pTHX_ OP *o)
        PL_main_root = scope(sawparens(scalarvoid(o)));
        PL_curcop = &PL_compiling;
        PL_main_start = LINKLIST(PL_main_root);
+       PL_main_root->op_private |= OPpREFCOUNTED;
+       OpREFCNT_set(PL_main_root, 1);
        PL_main_root->op_next = 0;
        peep(PL_main_start);
        PL_compcv = 0;
@@ -1803,7 +2006,7 @@ Perl_newPROG(pTHX_ OP *o)
            if (cv) {
                dSP;
                PUSHMARK(SP);
-               XPUSHs((SV*)PL_compiling.cop_filegv);
+               XPUSHs((SV*)CopFILEGV(&PL_compiling));
                PUTBACK;
                call_sv((SV*)cv, G_DISCARD);
            }
@@ -1899,7 +2102,8 @@ Perl_fold_constants(pTHX_ register OP *o)
        goto nope;              /* Don't try to run w/ errors */
 
     for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
-       if (curop->op_type != OP_CONST &&
+       if ((curop->op_type != OP_CONST ||
+            (curop->op_private & OPpCONST_BARE)) &&
            curop->op_type != OP_LIST &&
            curop->op_type != OP_SCALAR &&
            curop->op_type != OP_NULL &&
@@ -1944,8 +2148,12 @@ Perl_fold_constants(pTHX_ register OP *o)
        return o;
 
     if (!(PL_hints & HINT_INTEGER)) {
-       if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
+       if (type == OP_MODULO
+           || type == OP_DIVIDE
+           || !(o->op_flags & OPf_KIDS))
+       {
            return o;
+       }
 
        for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
            if (curop->op_type == OP_CONST) {
@@ -2607,7 +2815,7 @@ Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
                    }
 #else
                    if (curop->op_type == OP_GV) {
-                       GV *gv = ((GVOP*)curop)->op_gv;
+                       GV *gv = (GV*)((SVOP*)curop)->op_sv;
                        repl_has_vars = 1;
                        if (strchr("&`'123456789+", *GvENAME(gv)))
                            break;
@@ -2691,18 +2899,7 @@ OP *
 Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
 {
     dTHR;
-    GVOP *gvop;
-    NewOp(1101, gvop, 1, GVOP);
-    gvop->op_type = type;
-    gvop->op_ppaddr = PL_ppaddr[type];
-    gvop->op_gv = (GV*)SvREFCNT_inc(gv);
-    gvop->op_next = (OP*)gvop;
-    gvop->op_flags = flags;
-    if (PL_opargs[type] & OA_RETSCALAR)
-       scalar((OP*)gvop);
-    if (PL_opargs[type] & OA_TARGET)
-       gvop->op_targ = pad_alloc(type, SVs_PADTMP);
-    return CHECKOP(type, gvop);
+    return newSVOP(type, flags, SvREFCNT_inc(gv));
 }
 
 OP *
@@ -2771,7 +2968,6 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
        }
        else {
            OP *pack;
-           OP *meth;
 
            if (version->op_type != OP_CONST || !SvNIOK(vesv))
                Perl_croak(aTHX_ "Version number must be constant number");
@@ -2780,11 +2976,11 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
            pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
 
            /* Fake up a method call to VERSION */
-           meth = newSVOP(OP_CONST, 0, newSVpvn("VERSION", 7));
            veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
                            append_elem(OP_LIST,
                            prepend_elem(OP_LIST, pack, list(version)),
-                           newUNOP(OP_METHOD, 0, meth)));
+                           newSVOP(OP_METHOD_NAMED, 0,
+                                   newSVpvn("VERSION", 7))));
        }
     }
 
@@ -2797,15 +2993,12 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
     else {
        /* Make copy of id so we don't free it twice */
        pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
-       meth = newSVOP(OP_CONST, 0,
-           aver
-               ? newSVpvn("import", 6)
-               : newSVpvn("unimport", 8)
-           );
        imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
                    append_elem(OP_LIST,
                        prepend_elem(OP_LIST, pack, list(arg)),
-                       newUNOP(OP_METHOD, 0, meth)));
+                       newSVOP(OP_METHOD_NAMED, 0,
+                               aver ? newSVpvn("import", 6)
+                                    : newSVpvn("unimport", 8))));
     }
 
     /* Fake up a require, handle override, if any */
@@ -2825,15 +3018,17 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
     }
 
     /* Fake up the BEGIN {}, which does its thing immediately. */
-    newSUB(floor,
+    newATTRSUB(floor,
        newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
        Nullop,
+       Nullop,
        append_elem(OP_LINESEQ,
            append_elem(OP_LINESEQ,
                newSTATEOP(0, Nullch, rqop),
                newSTATEOP(0, Nullch, veop)),
            newSTATEOP(0, Nullch, imop) ));
 
+    PL_hints |= HINT_BLOCK_SCOPE;
     PL_copline = NOLINE;
     PL_expect = XSTATE;
 }
@@ -2943,7 +3138,7 @@ Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
            for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
                if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
                    if (curop->op_type == OP_GV) {
-                       GV *gv = ((GVOP*)curop)->op_gv;
+                       GV *gv = (GV*)((SVOP*)curop)->op_sv;
                        if (gv == PL_defgv || SvCUR(gv) == PL_generation)
                            break;
                        SvCUR(gv) = PL_generation;
@@ -2995,7 +3190,7 @@ Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
                {
                    tmpop = ((UNOP*)left)->op_first;
                    if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
-                       pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
+                       pm->op_pmreplroot = (OP*)((SVOP*)tmpop)->op_sv;
                        pm->op_pmflags |= PMf_ONCE;
                        tmpop = cUNOPo->op_first;       /* to list (nulled) */
                        tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
@@ -3079,14 +3274,14 @@ Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
     if (PL_copline == NOLINE)
         cop->cop_line = PL_curcop->cop_line;
     else {
-        cop->cop_line = PL_copline;
+       cop->cop_line = PL_copline;
         PL_copline = NOLINE;
     }
-    cop->cop_filegv = (GV*)SvREFCNT_inc(PL_curcop->cop_filegv);
+    CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
     cop->cop_stash = PL_curstash;
 
     if (PERLDB_LINE && PL_curstash != PL_debstash) {
-       SV **svp = av_fetch(GvAV(PL_curcop->cop_filegv),(I32)cop->cop_line, FALSE);
+       SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
        if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
            (void)SvIOK_on(*svp);
            SvIVX(*svp) = 1;
@@ -3185,14 +3380,20 @@ S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
            if (k2 && k2->op_type == OP_READLINE
                  && (k2->op_flags & OPf_STACKED)
                  && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR)) 
+           {
                warnop = k2->op_type;
+           }
            break;
 
        case OP_SASSIGN:
            if (k1->op_type == OP_READDIR
                  || k1->op_type == OP_GLOB
+                 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
                  || k1->op_type == OP_EACH)
-               warnop = k1->op_type;
+           {
+               warnop = ((k1->op_type == OP_NULL)
+                         ? k1->op_targ : k1->op_type);
+           }
            break;
        }
        if (warnop) {
@@ -3364,6 +3565,7 @@ Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
              case OP_SASSIGN:
                if (k1->op_type == OP_READDIR
                      || k1->op_type == OP_GLOB
+                     || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
                      || k1->op_type == OP_EACH)
                    expr = newUNOP(OP_DEFINED, 0, expr);
                break;
@@ -3417,6 +3619,7 @@ Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *
          case OP_SASSIGN:
            if (k1->op_type == OP_READDIR
                  || k1->op_type == OP_GLOB
+                 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
                  || k1->op_type == OP_EACH)
                expr = newUNOP(OP_DEFINED, 0, expr);
            break;
@@ -3668,13 +3871,14 @@ cv_dump(CV *cv)
     SV** ppad;
     I32 ix;
 
-    PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
-                 cv,
+    PerlIO_printf(Perl_debug_log,
+                 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
+                 PTR2UV(cv),
                  (CvANON(cv) ? "ANON"
                   : (cv == PL_main_cv) ? "MAIN"
                   : CvUNIQUE(cv) ? "UNIQUE"
                   : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
-                 outside,
+                 PTR2UV(outside),
                  (!outside ? "null"
                   : CvANON(outside) ? "ANON"
                   : (outside == PL_main_cv) ? "MAIN"
@@ -3691,12 +3895,13 @@ cv_dump(CV *cv)
 
     for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
        if (SvPOK(pname[ix]))
-           PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
-                         ix, ppad[ix],
+           PerlIO_printf(Perl_debug_log,
+                         "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
+                         ix, PTR2UV(ppad[ix]),
                          SvFAKE(pname[ix]) ? "FAKE " : "",
                          SvPVX(pname[ix]),
-                         (long)I_32(SvNVX(pname[ix])),
-                         (long)SvIVX(pname[ix]));
+                         (IV)I_32(SvNVX(pname[ix])),
+                         SvIVX(pname[ix]));
     }
 }
 #endif /* DEBUG_CLOSURES */
@@ -3736,7 +3941,6 @@ S_cv_clone2(pTHX_ CV *proto, CV *outside)
     MUTEX_INIT(CvMUTEXP(cv));
     CvOWNER(cv)                = 0;
 #endif /* USE_THREADS */
-    CvFILEGV(cv)       = CvFILEGV(proto);
     CvGV(cv)           = (GV*)SvREFCNT_inc(CvGV(proto));
     CvSTASH(cv)                = CvSTASH(proto);
     CvROOT(cv)         = CvROOT(proto);
@@ -3890,7 +4094,7 @@ Perl_op_const_sv(pTHX_ OP *o, CV *cv)
     for (; o; o = o->op_next) {
        OPCODE type = o->op_type;
 
-       if(sv && o->op_next == o) 
+       if (sv && o->op_next == o) 
            return sv;
        if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
            continue;
@@ -3914,14 +4118,35 @@ Perl_op_const_sv(pTHX_ OP *o, CV *cv)
     return sv;
 }
 
+void
+Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
+{
+    if (o)
+       SAVEFREEOP(o);
+    if (proto)
+       SAVEFREEOP(proto);
+    if (attrs)
+       SAVEFREEOP(attrs);
+    if (block)
+       SAVEFREEOP(block);
+    Perl_croak(aTHX_ "\"my sub\" not yet implemented");
+}
+
 CV *
 Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
 {
+    return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
+}
+
+CV *
+Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
+{
     dTHR;
     STRLEN n_a;
     char *name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
     GV *gv = gv_fetchpv(name ? name : "__ANON__",
-                       GV_ADDMULTI | (block ? 0 : GV_NOINIT), SVt_PVCV);
+                       GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
+                       SVt_PVCV);
     char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
     register CV *cv=0;
     I32 ix;
@@ -3930,8 +4155,10 @@ Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
        SAVEFREEOP(o);
     if (proto)
        SAVEFREEOP(proto);
+    if (attrs)
+       SAVEFREEOP(attrs);
 
-    if (SvTYPE(gv) != SVt_PVGV) {      /* Prototype now, and had
+    if (SvTYPE(gv) != SVt_PVGV) {      /* Maybe prototype now, and had at
                                           maximum a prototype before. */
        if (SvTYPE(gv) > SVt_NULL) {
            if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
@@ -3959,7 +4186,7 @@ Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
        if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
            SV* const_sv;
            bool const_changed = TRUE;
-           if (!block) {
+           if (!block && !attrs) {
                /* just a "sub foo;" when &foo is already defined */
                SAVEFREESV(PL_compcv);
                goto done;
@@ -3967,6 +4194,8 @@ Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
            /* ahem, death to those who redefine active sort subs */
            if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
                Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
+           if (!block)
+               goto withattrs;
            if(const_sv = cv_const_sv(cv))
                const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
            if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE) 
@@ -3978,14 +4207,46 @@ Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
                PL_curcop->cop_line = PL_copline;
                Perl_warner(aTHX_ WARN_REDEFINE,
                        const_sv ? "Constant subroutine %s redefined"
-                                : "Subroutine %s redefined", name);
+                                : "Subroutine %s redefined", name);
                PL_curcop->cop_line = oldline;
            }
            SvREFCNT_dec(cv);
            cv = Nullcv;
        }
     }
+  withattrs:
+    if (attrs) {
+       HV *stash;
+       SV *rcv;
+
+       /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
+        * before we clobber PL_compcv.
+        */
+       if (cv && !block) {
+           rcv = (SV*)cv;
+           if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
+               stash = GvSTASH(CvGV(cv));
+           else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
+               stash = CvSTASH(cv);
+           else
+               stash = PL_curstash;
+       }
+       else {
+           /* possibly about to re-define existing subr -- ignore old cv */
+           rcv = (SV*)PL_compcv;
+           if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
+               stash = GvSTASH(gv);
+           else
+               stash = PL_curstash;
+       }
+       apply_attrs(stash, rcv, attrs);
+    }
     if (cv) {                          /* must reuse cv if autoloaded */
+       if (!block) {
+           /* got here with just attrs -- work done, so bug out */
+           SAVEFREESV(PL_compcv);
+           goto done;
+       }
        cv_undef(cv);
        CvFLAGS(cv) = CvFLAGS(PL_compcv);
        CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
@@ -4005,7 +4266,6 @@ Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
        }
     }
     CvGV(cv) = (GV*)SvREFCNT_inc(gv);
-    CvFILEGV(cv) = PL_curcop->cop_filegv;
     CvSTASH(cv) = PL_curstash;
 #ifdef USE_THREADS
     CvOWNER(cv) = 0;
@@ -4083,7 +4343,14 @@ Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
        }
     }
 
-    CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
+    if (CvLVALUE(cv)) {
+       CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
+    }
+    else {
+       CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
+    }
+    CvROOT(cv)->op_private |= OPpREFCOUNTED;
+    OpREFCNT_set(CvROOT(cv), 1);
     CvSTART(cv) = LINKLIST(CvROOT(cv));
     CvROOT(cv)->op_next = 0;
     peep(CvSTART(cv));
@@ -4099,8 +4366,8 @@ Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
            HV *hv;
 
            Perl_sv_setpvf(aTHX_ sv, "%_:%ld-%ld",
-                   GvSV(PL_curcop->cop_filegv),
-                   (long)PL_subline, (long)PL_curcop->cop_line);
+                          CopFILESV(PL_curcop),
+                          (long)PL_subline, (long)CopLINE(PL_curcop));
            gv_efullname3(tmpstr, gv, Nullch);
            hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
            hv = GvHVn(db_postponed);
@@ -4121,7 +4388,7 @@ Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
        if (strEQ(s, "BEGIN")) {
            I32 oldscope = PL_scopestack_ix;
            ENTER;
-           SAVESPTR(PL_compiling.cop_filegv);
+           SAVESPTR(CopFILEGV(&PL_compiling));
            SAVEI16(PL_compiling.cop_line);
            save_svref(&PL_rs);
            sv_setsv(PL_rs, PL_nrs);
@@ -4173,10 +4440,11 @@ Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
     if(stash)
        PL_curstash = PL_curcop->cop_stash = stash;
 
-    newSUB(
+    newATTRSUB(
        start_subparse(FALSE, 0),
        newSVOP(OP_CONST, 0, newSVpv(name,0)),
        newSVOP(OP_CONST, 0, &PL_sv_no),        /* SvPV(&PL_sv_no) == "" -- GMB */
+       Nullop,
        newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
     );
 
@@ -4232,7 +4500,7 @@ Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
     MUTEX_INIT(CvMUTEXP(cv));
     CvOWNER(cv) = 0;
 #endif /* USE_THREADS */
-    CvFILEGV(cv) = gv_fetchfile(filename);
+    (void)gv_fetchfile(filename);
     CvXSUB(cv) = subaddr;
 
     if (name) {
@@ -4296,7 +4564,6 @@ Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
     cv = PL_compcv;
     GvFORM(gv) = cv;
     CvGV(cv) = (GV*)SvREFCNT_inc(gv);
-    CvFILEGV(cv) = PL_curcop->cop_filegv;
 
     for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
        if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
@@ -4304,6 +4571,8 @@ Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
     }
 
     CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
+    CvROOT(cv)->op_private |= OPpREFCOUNTED;
+    OpREFCNT_set(CvROOT(cv), 1);
     CvSTART(cv) = LINKLIST(CvROOT(cv));
     CvROOT(cv)->op_next = 0;
     peep(CvSTART(cv));
@@ -4329,8 +4598,15 @@ Perl_newANONHASH(pTHX_ OP *o)
 OP *
 Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
 {
+    return newANONATTRSUB(floor, proto, Nullop, block);
+}
+
+OP *
+Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
+{
     return newUNOP(OP_REFGEN, 0,
-       newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
+       newSVOP(OP_ANONCODE, 0,
+               (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
 }
 
 OP *
@@ -4813,8 +5089,8 @@ Perl_ck_fun(pTHX_ OP *o)
                        gv_fetchpv(name, TRUE, SVt_PVAV) ));
                    if (ckWARN(WARN_SYNTAX))
                        Perl_warner(aTHX_ WARN_SYNTAX,
-                           "Array @%s missing the @ in argument %ld of %s()",
-                           name, (long)numargs, PL_op_desc[type]);
+                           "Array @%s missing the @ in argument %"IVdf" of %s()",
+                           name, (IV)numargs, PL_op_desc[type]);
                    op_free(kid);
                    kid = newop;
                    kid->op_sibling = sibl;
@@ -4833,8 +5109,8 @@ Perl_ck_fun(pTHX_ OP *o)
                        gv_fetchpv(name, TRUE, SVt_PVHV) ));
                    if (ckWARN(WARN_SYNTAX))
                        Perl_warner(aTHX_ WARN_SYNTAX,
-                           "Hash %%%s missing the %% in argument %ld of %s()",
-                           name, (long)numargs, PL_op_desc[type]);
+                           "Hash %%%s missing the %% in argument %"IVdf" of %s()",
+                           name, (IV)numargs, PL_op_desc[type]);
                    op_free(kid);
                    kid = newop;
                    kid->op_sibling = sibl;
@@ -4937,6 +5213,19 @@ Perl_ck_glob(pTHX_ OP *o)
     if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
        gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
 
+#if defined(PERL_INTERNAL_GLOB) && !defined(MINIPERL_BUILD)
+    /* XXX this can be tightened up and made more failsafe. */
+    if (!gv) {
+       OP *modname = newSVOP(OP_CONST, 0, newSVpvn("File::Glob", 10));
+       modname->op_private |= OPpCONST_BARE;
+       ENTER;
+       utilize(1, start_subparse(FALSE, 0), Nullop, modname,
+               newSVOP(OP_CONST, 0, newSVpvn("globally", 8)));
+       gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
+       LEAVE;
+    }
+#endif /* PERL_INTERNAL_GLOB && !MINIPERL_BUILD */
+
     if (gv && GvIMPORTED_CV(gv)) {
        append_elem(OP_GLOB, o,
                    newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
@@ -5044,6 +5333,7 @@ Perl_ck_defined(pTHX_ OP *o)              /* 19990527 MJD */
     if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
        switch (cUNOPo->op_first->op_type) {
        case OP_RV2AV:
+           break;                      /* Globals via GV can be undef */ 
        case OP_PADAV:
        case OP_AASSIGN:                /* Is this a good idea? */
            Perl_warner(aTHX_ WARN_DEPRECATED,
@@ -5052,6 +5342,7 @@ Perl_ck_defined(pTHX_ OP *o)              /* 19990527 MJD */
                        "(Maybe you should just omit the defined()?)\n");
        break;
        case OP_RV2HV:
+           break;                      /* Globals via GV can be undef */ 
        case OP_PADHV:
            Perl_warner(aTHX_ WARN_DEPRECATED,
                        "defined(%hash) is deprecated");
@@ -5136,13 +5427,33 @@ Perl_ck_sassign(pTHX_ OP *o)
        OP *kkid = kid->op_sibling;
 
        /* Can just relocate the target. */
-       if (kkid && kkid->op_type == OP_PADSV) {
+       if (kkid && kkid->op_type == OP_PADSV
+           && !(kkid->op_private & OPpLVAL_INTRO))
+       {
            /* Concat has problems if target is equal to right arg. */
-           if (kid->op_type == OP_CONCAT
-               && kLISTOP->op_first->op_sibling->op_type == OP_PADSV
-               && kLISTOP->op_first->op_sibling->op_targ == kkid->op_targ)
-           {
-               return o;
+           if (kid->op_type == OP_CONCAT) {
+               if (kLISTOP->op_first->op_sibling->op_type == OP_PADSV
+                   && kLISTOP->op_first->op_sibling->op_targ == kkid->op_targ)
+                   return o;
+           }
+           else if (kid->op_type == OP_JOIN) {
+               /* do_join has problems if the arguments coincide with target.
+                  In fact the second argument *can* safely coincide,
+                  but ignore=pessimize this rare occasion. */
+               OP *arg = kLISTOP->op_first->op_sibling; /* Skip PUSHMARK */
+
+               while (arg) {
+                   if (arg->op_type == OP_PADSV
+                       && arg->op_targ == kkid->op_targ)
+                       return o;
+                   arg = arg->op_sibling;
+               }
+           }
+           else if (kid->op_type == OP_QUOTEMETA) {
+               /* quotemeta has problems if the argument coincides with target. */
+               if (kLISTOP->op_first->op_type == OP_PADSV
+                   && kLISTOP->op_first->op_targ == kkid->op_targ)
+                   return o;
            }
            kid->op_targ = kkid->op_targ;
            /* Now we do not need PADSV and SASSIGN. */
@@ -5177,6 +5488,26 @@ Perl_ck_match(pTHX_ OP *o)
 }
 
 OP *
+Perl_ck_method(pTHX_ OP *o)
+{
+    OP *kid = cUNOPo->op_first;
+    if (kid->op_type == OP_CONST) {
+       SV* sv = kSVOP->op_sv;
+       if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
+           OP *cmop;
+           sv_upgrade(sv, SVt_PVIV);
+           SvIOK_on(sv);
+           PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
+           cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
+           kSVOP->op_sv = Nullsv;
+           op_free(o);
+           return cmop;
+       }
+    }
+    return o;
+}
+
+OP *
 Perl_ck_null(pTHX_ OP *o)
 {
     return o;
@@ -5356,11 +5687,11 @@ S_simplify_sort(pTHX_ OP *o)
     if (kUNOP->op_first->op_type != OP_GV)
        return;
     kid = kUNOP->op_first;                             /* get past rv2sv */
-    if (GvSTASH(kGVOP->op_gv) != PL_curstash)
+    if (GvSTASH((GV*)kSVOP->op_sv) != PL_curstash)
        return;
-    if (strEQ(GvNAME(kGVOP->op_gv), "a"))
+    if (strEQ(GvNAME((GV*)kSVOP->op_sv), "a"))
        reversed = 0;
-    else if(strEQ(GvNAME(kGVOP->op_gv), "b"))
+    else if(strEQ(GvNAME((GV*)kSVOP->op_sv), "b"))
        reversed = 1;
     else
        return;
@@ -5371,10 +5702,10 @@ S_simplify_sort(pTHX_ OP *o)
     if (kUNOP->op_first->op_type != OP_GV)
        return;
     kid = kUNOP->op_first;                             /* get past rv2sv */
-    if (GvSTASH(kGVOP->op_gv) != PL_curstash
+    if (GvSTASH((GV*)kSVOP->op_sv) != PL_curstash
        || ( reversed
-           ? strNE(GvNAME(kGVOP->op_gv), "a")
-           : strNE(GvNAME(kGVOP->op_gv), "b")))
+           ? strNE(GvNAME((GV*)kSVOP->op_sv), "a")
+           : strNE(GvNAME((GV*)kSVOP->op_sv), "b")))
        return;
     o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
     if (reversed)
@@ -5383,9 +5714,10 @@ S_simplify_sort(pTHX_ OP *o)
        o->op_private |= OPpSORT_NUMERIC;
     if (k->op_type == OP_I_NCMP)
        o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
-    op_free(cLISTOPo->op_first->op_sibling);   /* delete comparison block */
-    cLISTOPo->op_first->op_sibling = cLISTOPo->op_last;
-    cLISTOPo->op_children = 1;
+    kid = cLISTOPo->op_first->op_sibling;
+    cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
+    op_free(kid);                                    /* then delete it */
+    cLISTOPo->op_children--;
 }
 
 OP *
@@ -5440,6 +5772,23 @@ Perl_ck_split(pTHX_ OP *o)
 }
 
 OP *
+Perl_ck_join(pTHX_ OP *o) 
+{
+    if (ckWARN(WARN_SYNTAX)) {
+       OP *kid = cLISTOPo->op_first->op_sibling;
+       if (kid && kid->op_type == OP_MATCH) {
+           char *pmstr = "STRING";
+           if (kPMOP->op_pmregexp)
+               pmstr = kPMOP->op_pmregexp->precomp;
+           Perl_warner(aTHX_ WARN_SYNTAX,
+                       "/%s/ should probably be written as \"%s\"",
+                       pmstr, pmstr);
+       }
+    }
+    return ck_fun(o);
+}
+
+OP *
 Perl_ck_subr(pTHX_ OP *o)
 {
     dTHR;
@@ -5454,6 +5803,7 @@ Perl_ck_subr(pTHX_ OP *o)
     I32 arg = 0;
     STRLEN n_a;
 
+    o->op_private |= OPpENTERSUB_HASTARG;
     for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
     if (cvop->op_type == OP_RV2CV) {
        SVOP* tmpop;
@@ -5470,7 +5820,7 @@ Perl_ck_subr(pTHX_ OP *o)
            }
        }
     }
-    else if (cvop->op_type == OP_METHOD) {
+    else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
        if (o2->op_type == OP_CONST)
            o2->op_private &= ~OPpCONST_STRICT;
        else if (o2->op_type == OP_LIST) {
@@ -5640,6 +5990,7 @@ Perl_peep(pTHX_ register OP *o)
     dTHR;
     register OP* oldop = 0;
     STRLEN n_a;
+    OP *last_composite = Nullop;
 
     if (!o || o->op_seq)
        return;
@@ -5653,10 +6004,12 @@ Perl_peep(pTHX_ register OP *o)
            PL_op_seqmax++;
        PL_op = o;
        switch (o->op_type) {
+       case OP_SETSTATE:
        case OP_NEXTSTATE:
        case OP_DBSTATE:
            PL_curcop = ((COP*)o);              /* for warnings */
            o->op_seq = PL_op_seqmax++;
+           last_composite = Nullop;
            break;
 
        case OP_CONST:
@@ -5685,8 +6038,10 @@ Perl_peep(pTHX_ register OP *o)
                            && (((LISTOP*)o)->op_first->op_sibling->op_targ
                                == o->op_next->op_targ))) {
                        goto ignore_optimization;
-                   } else {
+                   }
+                   else {
                        o->op_targ = o->op_next->op_targ;
+                       o->op_private |= OPpTARGET_MY;
                    }
                }
                null(o->op_next);
@@ -5701,8 +6056,12 @@ Perl_peep(pTHX_ register OP *o)
            }
            goto nothin;
        case OP_NULL:
-           if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
+           if (o->op_targ == OP_NEXTSTATE
+               || o->op_targ == OP_DBSTATE
+               || o->op_targ == OP_SETSTATE)
+           {
                PL_curcop = ((COP*)o);
+           }
            goto nothin;
        case OP_SCALAR:
        case OP_LINESEQ:
@@ -5737,7 +6096,6 @@ Perl_peep(pTHX_ register OP *o)
                                <= 255 &&
                    i >= 0)
                {
-                   SvREFCNT_dec(((SVOP*)pop)->op_sv);
                    null(o->op_next);
                    null(pop->op_next);
                    null(pop);
@@ -5746,11 +6104,11 @@ Perl_peep(pTHX_ register OP *o)
                    o->op_type = OP_AELEMFAST;
                    o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
                    o->op_private = (U8)i;
-                   GvAVn(((GVOP*)o)->op_gv);
+                   GvAVn((GV*)((SVOP*)o)->op_sv);
                }
            }
            else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_UNSAFE)) {
-               GV *gv = cGVOPo->op_gv;
+               GV *gv = (GV*)cSVOPo->op_sv;
                if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
                    /* XXX could check prototype here instead of just carping */
                    SV *sv = sv_newmortal();
@@ -5768,6 +6126,8 @@ Perl_peep(pTHX_ register OP *o)
        case OP_GREPWHILE:
        case OP_AND:
        case OP_OR:
+       case OP_ANDASSIGN:
+       case OP_ORASSIGN:
        case OP_COND_EXPR:
        case OP_RANGE:
            o->op_seq = PL_op_seqmax++;
@@ -5833,7 +6193,7 @@ Perl_peep(pTHX_ register OP *o)
            key = SvPV(*svp, keylen);
            indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
            if (!indsvp) {
-               Perl_croak(aTHX_ "No such field \"%s\" in variable %s of type %s",
+               Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
                      key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
            }
            ind = SvIV(*indsvp);
@@ -5848,6 +6208,42 @@ Perl_peep(pTHX_ register OP *o)
            break;
        }
 
+       case OP_RV2AV:
+       case OP_RV2HV:
+           if (!(o->op_flags & OPf_WANT)
+               || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
+           {
+               last_composite = o;
+           }
+           o->op_seq = PL_op_seqmax++;
+           break;
+
+       case OP_RETURN:
+           if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
+               o->op_seq = PL_op_seqmax++;
+               break;
+           }
+           /* FALL THROUGH */
+
+       case OP_LEAVESUBLV:
+           if (last_composite) {
+               OP *r = last_composite;
+
+               while (r->op_sibling)
+                  r = r->op_sibling;
+               if (r->op_next == o 
+                   || (r->op_next->op_type == OP_LIST
+                       && r->op_next->op_next == o))
+               {
+                   if (last_composite->op_type == OP_RV2AV)
+                       yyerror("Lvalue subs returning arrays not implemented yet");
+                   else
+                       yyerror("Lvalue subs returning hashes not implemented yet");
+                       ;
+               }               
+           }
+           /* FALL THROUGH */
+
        default:
            o->op_seq = PL_op_seqmax++;
            break;