Eliminate (SV *) casts from the rest of *.c, picking up one (further)
[p5sagit/p5-mst-13.2.git] / scope.c
diff --git a/scope.c b/scope.c
index b5925f7..6e74978 100644 (file)
--- a/scope.c
+++ b/scope.c
@@ -1,7 +1,7 @@
 /*    scope.c
  *
- *    Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- *    2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
+ *    Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ *    2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -28,6 +28,9 @@ SV**
 Perl_stack_grow(pTHX_ SV **sp, SV **p, int n)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_STACK_GROW;
+
     PL_stack_sp = sp;
 #ifndef STRESS_REALLOC
     av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
@@ -165,6 +168,8 @@ S_save_scalar_at(pTHX_ SV **sptr)
     SV * const osv = *sptr;
     register SV * const sv = *sptr = newSV(0);
 
+    PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
+
     if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
        if (SvGMAGICAL(osv)) {
            const bool oldtainted = PL_tainted;
@@ -182,6 +187,9 @@ Perl_save_scalar(pTHX_ GV *gv)
 {
     dVAR;
     SV ** const sptr = &GvSVn(gv);
+
+    PERL_ARGS_ASSERT_SAVE_SCALAR;
+
     PL_localizing = 1;
     SvGETMAGIC(*sptr);
     PL_localizing = 0;
@@ -198,6 +206,9 @@ void
 Perl_save_generic_svref(pTHX_ SV **sptr)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
+
     SSCHECK(3);
     SSPUSHPTR(sptr);
     SSPUSHPTR(SvREFCNT_inc(*sptr));
@@ -211,6 +222,9 @@ void
 Perl_save_generic_pvref(pTHX_ char **str)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
+
     SSCHECK(3);
     SSPUSHPTR(*str);
     SSPUSHPTR(str);
@@ -224,6 +238,9 @@ void
 Perl_save_shared_pvref(pTHX_ char **str)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
+
     SSCHECK(3);
     SSPUSHPTR(str);
     SSPUSHPTR(*str);
@@ -236,6 +253,9 @@ void
 Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
+
     SSCHECK(4);
     SSPUSHPTR(sv);
     SSPUSHINT(mask);
@@ -247,6 +267,9 @@ void
 Perl_save_gp(pTHX_ GV *gv, I32 empty)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_GP;
+
     SSGROW(3);
     SSPUSHPTR(SvREFCNT_inc(gv));
     SSPUSHPTR(GvGP(gv));
@@ -284,6 +307,8 @@ Perl_save_ary(pTHX_ GV *gv)
     AV * const oav = GvAVn(gv);
     AV *av;
 
+    PERL_ARGS_ASSERT_SAVE_ARY;
+
     if (!AvREAL(oav) && AvREIFY(oav))
        av_reify(oav);
     SSCHECK(3);
@@ -294,7 +319,7 @@ Perl_save_ary(pTHX_ GV *gv)
     GvAV(gv) = NULL;
     av = GvAVn(gv);
     if (SvMAGIC(oav))
-       mg_localize((SV*)oav, (SV*)av);
+       mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av));
     return av;
 }
 
@@ -304,6 +329,8 @@ Perl_save_hash(pTHX_ GV *gv)
     dVAR;
     HV *ohv, *hv;
 
+    PERL_ARGS_ASSERT_SAVE_HASH;
+
     SSCHECK(3);
     SSPUSHPTR(gv);
     SSPUSHPTR(ohv = GvHVn(gv));
@@ -312,7 +339,7 @@ Perl_save_hash(pTHX_ GV *gv)
     GvHV(gv) = NULL;
     hv = GvHVn(gv);
     if (SvMAGIC(ohv))
-       mg_localize((SV*)ohv, (SV*)hv);
+       mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv));
     return hv;
 }
 
@@ -322,6 +349,8 @@ Perl_save_item(pTHX_ register SV *item)
     dVAR;
     register SV * const sv = newSVsv(item);
 
+    PERL_ARGS_ASSERT_SAVE_ITEM;
+
     SSCHECK(3);
     SSPUSHPTR(item);           /* remember the pointer */
     SSPUSHPTR(sv);             /* remember the value */
@@ -332,6 +361,9 @@ void
 Perl_save_int(pTHX_ int *intp)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_INT;
+
     SSCHECK(3);
     SSPUSHINT(*intp);
     SSPUSHPTR(intp);
@@ -342,6 +374,9 @@ void
 Perl_save_bool(pTHX_ bool *boolp)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_BOOL;
+
     SSCHECK(3);
     SSPUSHBOOL(*boolp);
     SSPUSHPTR(boolp);
@@ -352,6 +387,9 @@ void
 Perl_save_I8(pTHX_ I8 *bytep)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_I8;
+
     SSCHECK(3);
     SSPUSHINT(*bytep);
     SSPUSHPTR(bytep);
@@ -362,6 +400,9 @@ void
 Perl_save_I16(pTHX_ I16 *intp)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_I16;
+
     SSCHECK(3);
     SSPUSHINT(*intp);
     SSPUSHPTR(intp);
@@ -372,6 +413,9 @@ void
 Perl_save_I32(pTHX_ I32 *intp)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_I32;
+
     SSCHECK(3);
     SSPUSHINT(*intp);
     SSPUSHPTR(intp);
@@ -385,6 +429,9 @@ void
 Perl_save_pptr(pTHX_ char **pptr)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_PPTR;
+
     SSCHECK(3);
     SSPUSHPTR(*pptr);
     SSPUSHPTR(pptr);
@@ -395,6 +442,9 @@ void
 Perl_save_vptr(pTHX_ void *ptr)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_VPTR;
+
     SSCHECK(3);
     SSPUSHPTR(*(char**)ptr);
     SSPUSHPTR(ptr);
@@ -405,6 +455,9 @@ void
 Perl_save_sptr(pTHX_ SV **sptr)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_SPTR;
+
     SSCHECK(3);
     SSPUSHPTR(*sptr);
     SSPUSHPTR(sptr);
@@ -412,21 +465,24 @@ Perl_save_sptr(pTHX_ SV **sptr)
 }
 
 void
-Perl_save_padsv(pTHX_ PADOFFSET off)
+Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
 {
     dVAR;
     SSCHECK(4);
     ASSERT_CURPAD_ACTIVE("save_padsv");
-    SSPUSHPTR(PL_curpad[off]);
+    SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
     SSPUSHPTR(PL_comppad);
     SSPUSHLONG((long)off);
-    SSPUSHINT(SAVEt_PADSV);
+    SSPUSHINT(SAVEt_PADSV_AND_MORTALIZE);
 }
 
 void
 Perl_save_hptr(pTHX_ HV **hptr)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_HPTR;
+
     SSCHECK(3);
     SSPUSHPTR(*hptr);
     SSPUSHPTR(hptr);
@@ -437,6 +493,9 @@ void
 Perl_save_aptr(pTHX_ AV **aptr)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_APTR;
+
     SSCHECK(3);
     SSPUSHPTR(*aptr);
     SSPUSHPTR(aptr);
@@ -456,6 +515,9 @@ void
 Perl_save_mortalizesv(pTHX_ SV *sv)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_MORTALIZESV;
+
     SSCHECK(2);
     SSPUSHPTR(sv);
     SSPUSHINT(SAVEt_MORTALIZESV);
@@ -483,6 +545,9 @@ void
 Perl_save_clearsv(pTHX_ SV **svp)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_CLEARSV;
+
     ASSERT_CURPAD_ACTIVE("save_clearsv");
     SSCHECK(2);
     SSPUSHLONG((long)(svp-PL_curpad));
@@ -494,6 +559,9 @@ void
 Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_DELETE;
+
     SSCHECK(4);
     SSPUSHINT(klen);
     SSPUSHPTR(key);
@@ -505,6 +573,9 @@ void
 Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
+
     SSCHECK(3);
     SSPUSHDPTR(f);
     SSPUSHPTR(p);
@@ -526,6 +597,9 @@ Perl_save_aelem(pTHX_ AV *av, I32 idx, SV **sptr)
 {
     dVAR;
     SV *sv;
+
+    PERL_ARGS_ASSERT_SAVE_AELEM;
+
     SvGETMAGIC(*sptr);
     SSCHECK(4);
     SSPUSHPTR(SvREFCNT_inc_simple(av));
@@ -550,6 +624,9 @@ Perl_save_helem(pTHX_ HV *hv, SV *key, SV **sptr)
 {
     dVAR;
     SV *sv;
+
+    PERL_ARGS_ASSERT_SAVE_HELEM;
+
     SvGETMAGIC(*sptr);
     SSCHECK(4);
     SSPUSHPTR(SvREFCNT_inc_simple(hv));
@@ -570,6 +647,9 @@ SV*
 Perl_save_svref(pTHX_ SV **sptr)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_SAVE_SVREF;
+
     SvGETMAGIC(*sptr);
     SSCHECK(3);
     SSPUSHPTR(sptr);
@@ -621,24 +701,20 @@ Perl_leave_scope(pTHX_ I32 base)
     while (PL_savestack_ix > base) {
        switch (SSPOPINT) {
        case SAVEt_ITEM:                        /* normal string */
-           value = (SV*)SSPOPPTR;
-           sv = (SV*)SSPOPPTR;
+           value = MUTABLE_SV(SSPOPPTR);
+           sv = MUTABLE_SV(SSPOPPTR);
            sv_replace(sv,value);
            PL_localizing = 2;
            SvSETMAGIC(sv);
            PL_localizing = 0;
            break;
        case SAVEt_SV:                          /* scalar reference */
-           value = (SV*)SSPOPPTR;
+           value = MUTABLE_SV(SSPOPPTR);
            gv = (GV*)SSPOPPTR;
            ptr = &GvSV(gv);
-           av = (AV*)gv; /* what to refcnt_dec */
+           av = MUTABLE_AV(gv); /* what to refcnt_dec */
        restore_sv:
            sv = *(SV**)ptr;
-           DEBUG_S(PerlIO_printf(Perl_debug_log,
-                                 "restore svref: %p %p:%s -> %p:%s\n",
-                                 (void*)ptr, (void*)sv, SvPEEK(sv),
-                                 (void*)value, SvPEEK(value)));
            *(SV**)ptr = value;
            SvREFCNT_dec(sv);
            PL_localizing = 2;
@@ -669,7 +745,7 @@ Perl_leave_scope(pTHX_ I32 base)
            }
            break;
        case SAVEt_GENERIC_SVREF:               /* generic sv */
-           value = (SV*)SSPOPPTR;
+           value = MUTABLE_SV(SSPOPPTR);
            ptr = SSPOPPTR;
            sv = *(SV**)ptr;
            *(SV**)ptr = value;
@@ -677,7 +753,7 @@ Perl_leave_scope(pTHX_ I32 base)
            SvREFCNT_dec(value);
            break;
        case SAVEt_AV:                          /* array reference */
-           av = (AV*)SSPOPPTR;
+           av = MUTABLE_AV(SSPOPPTR);
            gv = (GV*)SSPOPPTR;
            if (GvAV(gv)) {
                SvREFCNT_dec(GvAV(gv));
@@ -685,12 +761,12 @@ Perl_leave_scope(pTHX_ I32 base)
            GvAV(gv) = av;
            if (SvMAGICAL(av)) {
                PL_localizing = 2;
-               SvSETMAGIC((SV*)av);
+               SvSETMAGIC(MUTABLE_SV(av));
                PL_localizing = 0;
            }
            break;
        case SAVEt_HV:                          /* hash reference */
-           hv = (HV*)SSPOPPTR;
+           hv = MUTABLE_HV(SSPOPPTR);
            gv = (GV*)SSPOPPTR;
            if (GvHV(gv)) {
                SvREFCNT_dec(GvHV(gv));
@@ -698,7 +774,7 @@ Perl_leave_scope(pTHX_ I32 base)
            GvHV(gv) = hv;
            if (SvMAGICAL(hv)) {
                PL_localizing = 2;
-               SvSETMAGIC((SV*)hv);
+               SvSETMAGIC(MUTABLE_SV(hv));
                PL_localizing = 0;
            }
            break;
@@ -724,7 +800,7 @@ Perl_leave_scope(pTHX_ I32 base)
            break;
        case SAVEt_SPTR:                        /* SV* reference */
            ptr = SSPOPPTR;
-           *(SV**)ptr = (SV*)SSPOPPTR;
+           *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
            break;
        case SAVEt_VPTR:                        /* random* reference */
        case SAVEt_PPTR:                        /* char* reference */
@@ -733,11 +809,11 @@ Perl_leave_scope(pTHX_ I32 base)
            break;
        case SAVEt_HPTR:                        /* HV* reference */
            ptr = SSPOPPTR;
-           *(HV**)ptr = (HV*)SSPOPPTR;
+           *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
            break;
        case SAVEt_APTR:                        /* AV* reference */
            ptr = SSPOPPTR;
-           *(AV**)ptr = (AV*)SSPOPPTR;
+           *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
            break;
        case SAVEt_GP:                          /* scalar reference */
            ptr = SSPOPPTR;
@@ -751,11 +827,11 @@ Perl_leave_scope(pTHX_ I32 base)
            break;
        case SAVEt_FREESV:
            ptr = SSPOPPTR;
-           SvREFCNT_dec((SV*)ptr);
+           SvREFCNT_dec(MUTABLE_SV(ptr));
            break;
        case SAVEt_MORTALIZESV:
            ptr = SSPOPPTR;
-           sv_2mortal((SV*)ptr);
+           sv_2mortal(MUTABLE_SV(ptr));
            break;
        case SAVEt_FREEOP:
            ptr = SSPOPPTR;
@@ -796,10 +872,10 @@ Perl_leave_scope(pTHX_ I32 base)
                case SVt_NULL:
                    break;
                case SVt_PVAV:
-                   av_clear((AV*)sv);
+                   av_clear(MUTABLE_AV(sv));
                    break;
                case SVt_PVHV:
-                   hv_clear((HV*)sv);
+                   hv_clear(MUTABLE_HV(sv));
                    break;
                case SVt_PVCV:
                    Perl_croak(aTHX_ "panic: leave_scope pad code");
@@ -812,8 +888,8 @@ Perl_leave_scope(pTHX_ I32 base)
            else {      /* Someone has a claim on this, so abandon it. */
                const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
                switch (SvTYPE(sv)) {   /* Console ourselves with a new value */
-               case SVt_PVAV:  *(SV**)ptr = (SV*)newAV();      break;
-               case SVt_PVHV:  *(SV**)ptr = (SV*)newHV();      break;
+               case SVt_PVAV:  *(SV**)ptr = MUTABLE_SV(newAV());       break;
+               case SVt_PVHV:  *(SV**)ptr = MUTABLE_SV(newHV());       break;
                default:        *(SV**)ptr = newSV(0);          break;
                }
                SvREFCNT_dec(sv);       /* Cast current value to the winds. */
@@ -824,7 +900,7 @@ Perl_leave_scope(pTHX_ I32 base)
            break;
        case SAVEt_DELETE:
            ptr = SSPOPPTR;
-           hv = (HV*)ptr;
+           hv = MUTABLE_HV(ptr);
            ptr = SSPOPPTR;
            (void)hv_delete(hv, (char*)ptr, (I32)SSPOPINT, G_DISCARD);
            SvREFCNT_dec(hv);
@@ -848,16 +924,16 @@ Perl_leave_scope(pTHX_ I32 base)
            cxstack[i].blk_oldsp = SSPOPINT;
            break;
        case SAVEt_AELEM:               /* array element */
-           value = (SV*)SSPOPPTR;
+           value = MUTABLE_SV(SSPOPPTR);
            i = SSPOPINT;
-           av = (AV*)SSPOPPTR;
+           av = MUTABLE_AV(SSPOPPTR);
            ptr = av_fetch(av,i,1);
            if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
                SvREFCNT_dec(value);
            if (ptr) {
                sv = *(SV**)ptr;
                if (sv && sv != &PL_sv_undef) {
-                   if (SvTIED_mg((SV*)av, PERL_MAGIC_tied))
+                   if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
                        SvREFCNT_inc_void_NN(sv);
                    goto restore_sv;
                }
@@ -866,18 +942,18 @@ Perl_leave_scope(pTHX_ I32 base)
            SvREFCNT_dec(value);
            break;
        case SAVEt_HELEM:               /* hash element */
-           value = (SV*)SSPOPPTR;
-           sv = (SV*)SSPOPPTR;
-           hv = (HV*)SSPOPPTR;
+           value = MUTABLE_SV(SSPOPPTR);
+           sv = MUTABLE_SV(SSPOPPTR);
+           hv = MUTABLE_HV(SSPOPPTR);
            ptr = hv_fetch_ent(hv, sv, 1, 0);
            if (ptr) {
                const SV * const oval = HeVAL((HE*)ptr);
                if (oval && oval != &PL_sv_undef) {
                    ptr = &HeVAL((HE*)ptr);
-                   if (SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
+                   if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
                        SvREFCNT_inc_void(*(SV**)ptr);
                    SvREFCNT_dec(sv);
-                   av = (AV*)hv; /* what to refcnt_dec */
+                   av = MUTABLE_AV(hv); /* what to refcnt_dec */
                    goto restore_sv;
                }
            }
@@ -890,15 +966,15 @@ Perl_leave_scope(pTHX_ I32 base)
            break;
        case SAVEt_HINTS:
            if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
-               SvREFCNT_dec((SV*)GvHV(PL_hintgv));
+               SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
                GvHV(PL_hintgv) = NULL;
            }
            *(I32*)&PL_hints = (I32)SSPOPINT;
            Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
            PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
            if (PL_hints & HINT_LOCALIZE_HH) {
-               SvREFCNT_dec((SV*)GvHV(PL_hintgv));
-               GvHV(PL_hintgv) = (HV*)SSPOPPTR;
+               SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
+               GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
                assert(GvHV(PL_hintgv));
            } else if (!GvHV(PL_hintgv)) {
                /* Need to add a new one manually, else gv_fetchpv() can
@@ -929,19 +1005,25 @@ Perl_leave_scope(pTHX_ I32 base)
            else
                PL_curpad = NULL;
            break;
-       case SAVEt_PADSV:
+       case SAVEt_PADSV_AND_MORTALIZE:
            {
                const PADOFFSET off = (PADOFFSET)SSPOPLONG;
+               SV **svp;
                ptr = SSPOPPTR;
-               if (ptr)
-                   AvARRAY((PAD*)ptr)[off] = (SV*)SSPOPPTR;
+               assert (ptr);
+               svp = AvARRAY((PAD*)ptr) + off;
+               /* This mortalizing used to be done by POPLOOP() via itersave.
+                  But as we have all the information here, we can do it here,
+                  save even having to have itersave in the struct.  */
+               sv_2mortal(*svp);
+               *svp = MUTABLE_SV(SSPOPPTR);
            }
            break;
        case SAVEt_SAVESWITCHSTACK:
            {
                dSP;
-               AV* const t = (AV*)SSPOPPTR;
-               AV* const f = (AV*)SSPOPPTR;
+               AV *const t = MUTABLE_AV(SSPOPPTR);
+               AV *const f = MUTABLE_AV(SSPOPPTR);
                SWITCHSTACK(t,f);
                PL_curstackinfo->si_stack = f;
            }
@@ -950,21 +1032,34 @@ Perl_leave_scope(pTHX_ I32 base)
            {
                const U32 val  = (U32)SSPOPINT;
                const U32 mask = (U32)SSPOPINT;
-               sv = (SV*)SSPOPPTR;
+               sv = MUTABLE_SV(SSPOPPTR);
                SvFLAGS(sv) &= ~mask;
                SvFLAGS(sv) |= val;
            }
            break;
-           /* These are only saved in mathoms.c */
+
+           /* This would be a mathom, but Perl_save_svref() calls a static
+              function, S_save_scalar_at(), so has to stay in this file.  */
        case SAVEt_SVREF:                       /* scalar reference */
-           value = (SV*)SSPOPPTR;
+           value = MUTABLE_SV(SSPOPPTR);
            ptr = SSPOPPTR;
            av = NULL; /* what to refcnt_dec */
            goto restore_sv;
+
+           /* These are only saved in mathoms.c */
+       case SAVEt_NSTAB:
+           gv = (GV*)SSPOPPTR;
+           (void)sv_clear(MUTABLE_SV(gv));
+           break;
        case SAVEt_LONG:                        /* long reference */
            ptr = SSPOPPTR;
            *(long*)ptr = (long)SSPOPLONG;
            break;
+       case SAVEt_IV:                          /* IV reference */
+           ptr = SSPOPPTR;
+           *(IV*)ptr = (IV)SSPOPIV;
+           break;
+
        case SAVEt_I16:                         /* I16 reference */
            ptr = SSPOPPTR;
            *(I16*)ptr = (I16)SSPOPINT;
@@ -973,14 +1068,6 @@ Perl_leave_scope(pTHX_ I32 base)
            ptr = SSPOPPTR;
            *(I8*)ptr = (I8)SSPOPINT;
            break;
-       case SAVEt_IV:                          /* IV reference */
-           ptr = SSPOPPTR;
-           *(IV*)ptr = (IV)SSPOPIV;
-           break;
-       case SAVEt_NSTAB:
-           gv = (GV*)SSPOPPTR;
-           (void)sv_clear((SV*)gv);
-           break;
        case SAVEt_DESTRUCTOR:
            ptr = SSPOPPTR;
            (*SSPOPDPTR)(ptr);
@@ -1029,6 +1116,9 @@ void
 Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
 {
     dVAR;
+
+    PERL_ARGS_ASSERT_CX_DUMP;
+
 #ifdef DEBUGGING
     PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
     if (CxTYPE(cx) != CXt_SUBST) {
@@ -1053,7 +1143,7 @@ Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
        PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
                PTR2UV(cx->blk_format.dfoutgv));
        PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
-               (int)cx->blk_format.hasargs);
+                     (int)CxHASARGS(cx));
        PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
                PTR2UV(cx->blk_format.retop));
        break;
@@ -1063,18 +1153,17 @@ Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
        PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
                (long)cx->blk_sub.olddepth);
        PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
-               (int)cx->blk_sub.hasargs);
-       PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n",
-               (int)cx->blk_sub.lval);
+               (int)CxHASARGS(cx));
+       PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
        PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
                PTR2UV(cx->blk_sub.retop));
        break;
     case CXt_EVAL:
        PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
-               (long)cx->blk_eval.old_in_eval);
+               (long)CxOLD_IN_EVAL(cx));
        PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
-               PL_op_name[cx->blk_eval.old_op_type],
-               PL_op_desc[cx->blk_eval.old_op_type]);
+               PL_op_name[CxOLD_OP_TYPE(cx)],
+               PL_op_desc[CxOLD_OP_TYPE(cx)]);
        if (cx->blk_eval.old_namesv)
            PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
                          SvPVX_const(cx->blk_eval.old_namesv));
@@ -1084,7 +1173,10 @@ Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
                PTR2UV(cx->blk_eval.retop));
        break;
 
-    case CXt_LOOP:
+    case CXt_LOOP_LAZYIV:
+    case CXt_LOOP_LAZYSV:
+    case CXt_LOOP_FOR:
+    case CXt_LOOP_PLAIN:
        PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
        PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
                (long)cx->blk_loop.resetsp);
@@ -1092,17 +1184,13 @@ Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
                PTR2UV(cx->blk_loop.my_op));
        PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
                PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
-       PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
-               (long)cx->blk_loop.iterix);
+       /* XXX: not accurate for LAZYSV/IV */
        PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
-               PTR2UV(cx->blk_loop.iterary));
+               PTR2UV(cx->blk_loop.state_u.ary.ary));
+       PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
+               (long)cx->blk_loop.state_u.ary.ix);
        PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
                PTR2UV(CxITERVAR(cx)));
-       if (CxITERVAR(cx))
-           PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%"UVxf"\n",
-               PTR2UV(cx->blk_loop.itersave));
-       PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%"UVxf"\n",
-               PTR2UV(cx->blk_loop.iterlval));
        break;
 
     case CXt_SUBST:
@@ -1113,7 +1201,7 @@ Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
        PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
                (long)cx->sb_rflags);
        PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
-               (long)cx->sb_once);
+               (long)CxONCE(cx));
        PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
                cx->sb_orig);
        PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",