X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=op.c;h=b9b144083cbd990c793b03d9b2acab3ba23ccef5;hb=8659febc83cb1245132b6675e1276f70f4cf2801;hp=ac1311de7781ad5a3884084a6d6e9f24513ec847;hpb=9a957fbc017c803266bc4e3766dfcbfb58cfa99b;p=p5sagit%2Fp5-mst-13.2.git diff --git a/op.c b/op.c index ac1311d..b9b1440 100644 --- a/op.c +++ b/op.c @@ -1,7 +1,7 @@ /* op.c * * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, - * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others + * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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. @@ -128,7 +128,7 @@ Perl_Slab_Alloc(pTHX_ int m, size_t sz) void Perl_Slab_Free(pTHX_ void *op) { - I32 ** const ptr = (I32 **) op; + I32 * const * const ptr = (I32 **) op; I32 * const slab = ptr[-1]; assert( ptr-1 > (I32 **) slab ); assert( ptr < ( (I32 **) slab + PERL_SLAB_SIZE) ); @@ -211,11 +211,13 @@ Perl_allocmy(pTHX_ char *name) PADOFFSET off; /* complain about "my $" etc etc */ - if (!(PL_in_my == KEY_our || + if (*name && + !(PL_in_my == KEY_our || isALPHA(name[1]) || (USE_UTF8_IN_NAMES && UTF8_IS_START(name[1])) || - (name[1] == '_' && (*name == '$' || (int)strlen(name) > 2)))) + (name[1] == '_' && (*name == '$' || name[2])))) { + /* name[2] is true if strlen(name) > 2 */ if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) { /* 1999-02-27 mjd@plover.com */ char *p; @@ -257,7 +259,7 @@ Perl_allocmy(pTHX_ char *name) (PL_in_my == KEY_our /* $_ is always in main::, even with our */ ? (PL_curstash && !strEQ(name,"$_") ? PL_curstash : PL_defstash) - : Nullhv + : NULL ), 0 /* not fake */ ); @@ -404,9 +406,9 @@ Perl_op_clear(pTHX_ OP *o) case OP_QR: clear_pmop: { - HV *pmstash = PmopSTASH(cPMOPo); - if (pmstash && SvREFCNT(pmstash)) { - MAGIC *mg = mg_find((SV*)pmstash, PERL_MAGIC_symtab); + HV * const pmstash = PmopSTASH(cPMOPo); + if (pmstash && !SvIS_FREED(pmstash)) { + MAGIC * const mg = mg_find((SV*)pmstash, PERL_MAGIC_symtab); if (mg) { PMOP *pmop = (PMOP*) mg->mg_obj; PMOP *lastpmop = NULL; @@ -560,7 +562,7 @@ Perl_scalar(pTHX_ OP *o) OP *kid; /* assumes no premature commitment */ - if (!o || (o->op_flags & OPf_WANT) || PL_error_count + if (!o || PL_error_count || (o->op_flags & OPf_WANT) || o->op_type == OP_RETURN) { return o; @@ -629,7 +631,7 @@ Perl_scalarvoid(pTHX_ OP *o) { dVAR; OP *kid; - const char* useless = 0; + const char* useless = NULL; SV* sv; U8 want; @@ -804,10 +806,22 @@ Perl_scalarvoid(pTHX_ OP *o) o->op_ppaddr = PL_ppaddr[OP_PREDEC]; break; + case OP_I_POSTINC: + o->op_type = OP_I_PREINC; /* pre-increment is faster */ + o->op_ppaddr = PL_ppaddr[OP_I_PREINC]; + break; + + case OP_I_POSTDEC: + o->op_type = OP_I_PREDEC; /* pre-decrement is faster */ + o->op_ppaddr = PL_ppaddr[OP_I_PREDEC]; + break; + case OP_OR: case OP_AND: case OP_DOR: case OP_COND_EXPR: + case OP_ENTERGIVEN: + case OP_ENTERWHEN: for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) scalarvoid(kid); break; @@ -829,6 +843,8 @@ Perl_scalarvoid(pTHX_ OP *o) case OP_LEAVELOOP: case OP_LINESEQ: case OP_LIST: + case OP_LEAVEGIVEN: + case OP_LEAVEWHEN: for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) scalarvoid(kid); break; @@ -977,7 +993,7 @@ S_modkids(pTHX_ OP *o, I32 type) return o; } -/* Propagate lvalue ("modifiable") context to an op and it's children. +/* Propagate lvalue ("modifiable") context to an op and its children. * 'type' represents the context type, roughly based on the type of op that * would do the modifying, although local() is represented by OP_NULL. * It's responsible for detecting things that can't be modified, flag @@ -1034,6 +1050,10 @@ Perl_mod(pTHX_ OP *o, I32 type) if ((type == OP_UNDEF || type == OP_REFGEN) && !(o->op_flags & OPf_STACKED)) { o->op_type = OP_RV2CV; /* entersub => rv2cv */ + /* The default is to set op_private to the number of children, + which for a UNOP such as RV2CV is always 1. And w're using + the bit for a flag in RV2CV, so we need it clear. */ + o->op_private &= ~1; o->op_ppaddr = PL_ppaddr[OP_RV2CV]; assert(cUNOPo->op_first->op_type == OP_NULL); op_null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */ @@ -1079,6 +1099,7 @@ Perl_mod(pTHX_ OP *o, I32 type) newop->op_next = (OP*)newop; kid->op_sibling = (OP*)newop; newop->op_private |= OPpLVAL_INTRO; + newop->op_private &= ~1; break; } @@ -1113,6 +1134,7 @@ Perl_mod(pTHX_ OP *o, I32 type) okid->op_targ = 0; okid->op_ppaddr = PL_ppaddr[OP_RV2CV]; okid->op_private |= OPpLVAL_INTRO; + okid->op_private &= ~1; break; } @@ -1126,8 +1148,9 @@ Perl_mod(pTHX_ OP *o, I32 type) /* FALL THROUGH */ default: nomod: - /* grep, foreach, subcalls, refgen */ - if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) + /* grep, foreach, subcalls, refgen, m//g */ + if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN + || type == OP_MATCH) break; yyerror(Perl_form(aTHX_ "Can't modify %s in %s", (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL) @@ -1412,7 +1435,7 @@ Perl_refkids(pTHX_ OP *o, I32 type) } OP * -Perl_ref(pTHX_ OP *o, I32 type) +Perl_doref(pTHX_ OP *o, I32 type, bool set_op_ref) { dVAR; OP *kid; @@ -1429,17 +1452,18 @@ Perl_ref(pTHX_ OP *o, I32 type) assert(cUNOPo->op_first->op_type == OP_NULL); op_null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */ o->op_flags |= OPf_SPECIAL; + o->op_private &= ~1; } break; case OP_COND_EXPR: for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) - ref(kid, type); + doref(kid, type, set_op_ref); break; case OP_RV2SV: if (type == OP_DEFINED) o->op_flags |= OPf_SPECIAL; /* don't create GV */ - ref(cUNOPo->op_first, o->op_type); + doref(cUNOPo->op_first, o->op_type, set_op_ref); /* FALL THROUGH */ case OP_PADSV: if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) { @@ -1456,28 +1480,30 @@ Perl_ref(pTHX_ OP *o, I32 type) case OP_RV2AV: case OP_RV2HV: - o->op_flags |= OPf_REF; + if (set_op_ref) + o->op_flags |= OPf_REF; /* FALL THROUGH */ case OP_RV2GV: if (type == OP_DEFINED) o->op_flags |= OPf_SPECIAL; /* don't create GV */ - ref(cUNOPo->op_first, o->op_type); + doref(cUNOPo->op_first, o->op_type, set_op_ref); break; case OP_PADAV: case OP_PADHV: - o->op_flags |= OPf_REF; + if (set_op_ref) + o->op_flags |= OPf_REF; break; case OP_SCALAR: case OP_NULL: if (!(o->op_flags & OPf_KIDS)) break; - ref(cBINOPo->op_first, type); + doref(cBINOPo->op_first, type, set_op_ref); break; case OP_AELEM: case OP_HELEM: - ref(cBINOPo->op_first, o->op_type); + doref(cBINOPo->op_first, o->op_type, set_op_ref); if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) { o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV : type == OP_RV2HV ? OPpDEREF_HV @@ -1488,11 +1514,13 @@ Perl_ref(pTHX_ OP *o, I32 type) case OP_SCOPE: case OP_LEAVE: + set_op_ref = FALSE; + /* FALL THROUGH */ case OP_ENTER: case OP_LIST: if (!(o->op_flags & OPf_KIDS)) break; - ref(cLISTOPo->op_last, type); + doref(cLISTOPo->op_last, type, set_op_ref); break; default: break; @@ -1504,7 +1532,7 @@ Perl_ref(pTHX_ OP *o, I32 type) STATIC OP * S_dup_attrlist(pTHX_ OP *o) { - OP *rop = Nullop; + OP *rop; /* 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 @@ -1514,6 +1542,7 @@ S_dup_attrlist(pTHX_ OP *o) rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv)); else { assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS)); + rop = Nullop; for (o = cLISTOPo->op_first; o; o=o->op_sibling) { if (o->op_type == OP_CONST) rop = append_elem(OP_LIST, rop, @@ -1540,7 +1569,7 @@ S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs, bool for_my) if (for_my) { /* Don't force the C if we don't need it. */ - SV **svp = hv_fetch(GvHVn(PL_incgv), ATTRSMODULE_PM, + SV * const * const svp = hv_fetch(GvHVn(PL_incgv), ATTRSMODULE_PM, sizeof(ATTRSMODULE_PM)-1, 0); if (svp && *svp != &PL_sv_undef) ; /* already in %INC */ @@ -1595,7 +1624,7 @@ S_apply_attrs_my(pTHX_ HV *stash, OP *target, OP *attrs, OP **imopsp) dup_attrlist(attrs))); /* Fake up a method call to import */ - meth = newSVpvn_share("import", 6, 0); + meth = newSVpvs_share("import"); imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL|OPf_WANT_VOID, append_elem(OP_LIST, prepend_elem(OP_LIST, pack, list(arg)), @@ -1676,9 +1705,9 @@ S_my_kid(pTHX_ OP *o, OP *attrs, OP **imopsp) yyerror(Perl_form(aTHX_ "Can't declare %s in %s", OP_DESC(o), PL_in_my == KEY_our ? "our" : "my")); } else if (attrs) { - GV *gv = cGVOPx_gv(cUNOPo->op_first); + GV * const gv = cGVOPx_gv(cUNOPo->op_first); PL_in_my = FALSE; - PL_in_my_stash = Nullhv; + PL_in_my_stash = NULL; apply_attrs(GvSTASH(gv), (type == OP_RV2SV ? GvSV(gv) : type == OP_RV2AV ? (SV*)GvAV(gv) : @@ -1702,7 +1731,7 @@ S_my_kid(pTHX_ OP *o, OP *attrs, OP **imopsp) HV *stash; PL_in_my = FALSE; - PL_in_my_stash = Nullhv; + PL_in_my_stash = NULL; /* check for C when deciding package */ stash = PAD_COMPNAME_TYPE(o->op_targ); @@ -1718,7 +1747,7 @@ S_my_kid(pTHX_ OP *o, OP *attrs, OP **imopsp) OP * Perl_my_attrs(pTHX_ OP *o, OP *attrs) { - OP *rops = Nullop; + OP *rops; int maybe_scalar = 0; /* [perl #17376]: this appears to be premature, and results in code such as @@ -1733,6 +1762,7 @@ Perl_my_attrs(pTHX_ OP *o, OP *attrs) #endif if (attrs) SAVEFREEOP(attrs); + rops = Nullop; o = my_kid(o, attrs, &rops); if (rops) { if (maybe_scalar && o->op_type == OP_PADSV) { @@ -1743,7 +1773,7 @@ Perl_my_attrs(pTHX_ OP *o, OP *attrs) o = append_list(OP_LIST, (LISTOP*)o, (LISTOP*)rops); } PL_in_my = FALSE; - PL_in_my_stash = Nullhv; + PL_in_my_stash = NULL; return o; } @@ -1773,10 +1803,10 @@ Perl_bind_match(pTHX_ I32 type, OP *left, OP *right) left->op_type == OP_PADHV) && ckWARN(WARN_MISC)) { - const char *desc = PL_op_desc[(right->op_type == OP_SUBST || + const char * const desc = PL_op_desc[(right->op_type == OP_SUBST || right->op_type == OP_TRANS) ? right->op_type : OP_MATCH]; - const char *sample = ((left->op_type == OP_RV2AV || + const char * const sample = ((left->op_type == OP_RV2AV || left->op_type == OP_PADAV) ? "@array" : "%hash"); Perl_warner(aTHX_ packWARN(WARN_MISC), @@ -1800,9 +1830,14 @@ Perl_bind_match(pTHX_ I32 type, OP *left, OP *right) } if (!(right->op_flags & OPf_STACKED) && ismatchop) { right->op_flags |= OPf_STACKED; - if (right->op_type != OP_MATCH && - ! (right->op_type == OP_TRANS && - right->op_private & OPpTRANS_IDENTICAL)) + /* s/// and tr/// modify their arg. + * m//g also indirectly modifies the arg by setting pos magic on it */ + if ( (right->op_type == OP_MATCH && + (cPMOPx(right)->op_pmflags & PMf_GLOBAL)) + || (right->op_type == OP_SUBST) + || (right->op_type == OP_TRANS && + ! (right->op_private & OPpTRANS_IDENTICAL)) + ) left = mod(left, right->op_type); if (right->op_type == OP_TRANS) o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right); @@ -1841,8 +1876,15 @@ 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_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) { op_null(kid); + + /* The following deals with things like 'do {1 for 1}' */ + kid = kid->op_sibling; + if (kid && + (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)) + op_null(kid); + } } else o = newLISTOP(OP_SCOPE, 0, o, Nullop); @@ -1850,13 +1892,6 @@ Perl_scope(pTHX_ OP *o) return o; } -/* XXX kept for BINCOMPAT only */ -void -Perl_save_hints(pTHX) -{ - Perl_croak(aTHX_ "internal error: obsolete function save_hints() called"); -} - int Perl_block_start(pTHX_ int full) { @@ -1881,7 +1916,7 @@ OP* Perl_block_end(pTHX_ I32 floor, OP *seq) { const int needblockscope = PL_hints & HINT_BLOCK_SCOPE; - OP* retval = scalarseq(seq); + OP* const retval = scalarseq(seq); LEAVE_SCOPE(floor); PL_compiling.op_private = (U8)(PL_hints & HINT_PRIVATE_MASK); if (needblockscope) @@ -1898,7 +1933,7 @@ S_newDEFSVOP(pTHX) return newSVREF(newGVOP(OP_GV, 0, PL_defgv)); } else { - OP *o = newOP(OP_PADSV, 0); + OP * const o = newOP(OP_PADSV, 0); o->op_targ = offset; return o; } @@ -1937,7 +1972,7 @@ Perl_newPROG(pTHX_ OP *o) /* Register with debugger */ if (PERLDB_INTER) { - CV *cv = get_cv("DB::postponed", FALSE); + CV * const cv = get_cv("DB::postponed", FALSE); if (cv) { dSP; PUSHMARK(SP); @@ -1997,7 +2032,7 @@ Perl_localize(pTHX_ OP *o, I32 lex) else o = mod(o, OP_NULL); /* a bit kludgey */ PL_in_my = FALSE; - PL_in_my_stash = Nullhv; + PL_in_my_stash = NULL; return o; } @@ -2006,7 +2041,7 @@ Perl_jmaybe(pTHX_ OP *o) { if (o->op_type == OP_LIST) { OP *o2; - o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))), + o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", GV_ADD, SVt_PV))), o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o)); } return o; @@ -2042,7 +2077,6 @@ Perl_fold_constants(pTHX_ register OP *o) /* XXX might want a ck_negate() for this */ cUNOPo->op_first->op_private &= ~OPpCONST_STRICT; break; - case OP_SPRINTF: case OP_UCFIRST: case OP_LCFIRST: case OP_UC: @@ -2269,8 +2303,7 @@ Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last) listop->op_first = first; listop->op_last = last; if (type == OP_LIST) { - OP* pushop; - pushop = newOP(OP_PUSHMARK, 0); + OP* const pushop = newOP(OP_PUSHMARK, 0); pushop->op_sibling = first; listop->op_first = pushop; listop->op_flags |= OPf_KIDS; @@ -2315,7 +2348,7 @@ Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first) unop->op_type = (OPCODE)type; unop->op_ppaddr = PL_ppaddr[type]; unop->op_first = first; - unop->op_flags = flags | OPf_KIDS; + unop->op_flags = (U8)(flags | OPf_KIDS); unop->op_private = (U8)(1 | (flags >> 8)); unop = (UNOP*) CHECKOP(type, unop); if (unop->op_next) @@ -2337,7 +2370,7 @@ Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last) binop->op_type = (OPCODE)type; binop->op_ppaddr = PL_ppaddr[type]; binop->op_first = first; - binop->op_flags = flags | OPf_KIDS; + binop->op_flags = (U8)(flags | OPf_KIDS); if (!last) { last = first; binop->op_private = (U8)(1 | (flags >> 8)); @@ -2373,24 +2406,21 @@ static int uvcompare(const void *a, const void *b) OP * Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl) { - SV *tstr = ((SVOP*)expr)->op_sv; - SV *rstr = ((SVOP*)repl)->op_sv; + SV * const tstr = ((SVOP*)expr)->op_sv; + SV * const rstr = ((SVOP*)repl)->op_sv; STRLEN tlen; STRLEN rlen; const U8 *t = (U8*)SvPV_const(tstr, tlen); const U8 *r = (U8*)SvPV_const(rstr, rlen); register I32 i; register I32 j; - I32 del; - I32 complement; - I32 squash; I32 grows = 0; register short *tbl; + const I32 complement = o->op_private & OPpTRANS_COMPLEMENT; + const I32 squash = o->op_private & OPpTRANS_SQUASH; + I32 del = o->op_private & OPpTRANS_DELETE; PL_hints |= HINT_BLOCK_SCOPE; - complement = o->op_private & OPpTRANS_COMPLEMENT; - del = o->op_private & OPpTRANS_DELETE; - squash = o->op_private & OPpTRANS_SQUASH; if (SvUTF8(tstr)) o->op_private |= OPpTRANS_FROM_UTF; @@ -2399,8 +2429,8 @@ Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl) o->op_private |= OPpTRANS_TO_UTF; if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) { - SV* listsv = newSVpvn("# comment\n",10); - SV* transv = 0; + SV* const listsv = newSVpvs("# comment\n"); + SV* transv = NULL; const U8* tend = t + tlen; const U8* rend = r + rlen; STRLEN ulen; @@ -2416,8 +2446,8 @@ Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl) I32 bits; I32 havefinal = 0; U32 final = 0; - I32 from_utf = o->op_private & OPpTRANS_FROM_UTF; - I32 to_utf = o->op_private & OPpTRANS_TO_UTF; + const I32 from_utf = o->op_private & OPpTRANS_FROM_UTF; + const I32 to_utf = o->op_private & OPpTRANS_TO_UTF; U8* tsave = NULL; U8* rsave = NULL; @@ -2444,7 +2474,7 @@ Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl) UV nextmin = 0; Newx(cp, 2*tlen, UV); i = 0; - transv = newSVpvn("",0); + transv = newSVpvs(""); while (t < tend) { cp[2*i] = utf8n_to_uvuni(t, tend-t, &ulen, 0); t += ulen; @@ -2637,7 +2667,7 @@ Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl) j = rlen - 1; else cPVOPo->op_pv = (char*)Renew(tbl, 0x101+rlen-j, short); - tbl[0x100] = rlen - j; + tbl[0x100] = (short)(rlen - j); for (i=0; i < (I32)rlen - j; i++) tbl[0x101+i] = r[j+i]; } @@ -2696,19 +2726,16 @@ Perl_newPMOP(pTHX_ I32 type, I32 flags) pmop->op_pmflags = pmop->op_pmpermflags; #ifdef USE_ITHREADS - { - SV* repointer; - if(av_len((AV*) PL_regex_pad[0]) > -1) { - repointer = av_pop((AV*)PL_regex_pad[0]); - pmop->op_pmoffset = SvIV(repointer); - SvREPADTMP_off(repointer); - sv_setiv(repointer,0); - } else { - repointer = newSViv(0); - av_push(PL_regex_padav,SvREFCNT_inc(repointer)); - pmop->op_pmoffset = av_len(PL_regex_padav); - PL_regex_pad = AvARRAY(PL_regex_padav); - } + if (av_len((AV*) PL_regex_pad[0]) > -1) { + SV * const repointer = av_pop((AV*)PL_regex_pad[0]); + pmop->op_pmoffset = SvIV(repointer); + SvREPADTMP_off(repointer); + sv_setiv(repointer,0); + } else { + SV * const repointer = newSViv(0); + av_push(PL_regex_padav,SvREFCNT_inc(repointer)); + pmop->op_pmoffset = av_len(PL_regex_padav); + PL_regex_pad = AvARRAY(PL_regex_padav); } #endif @@ -2764,7 +2791,7 @@ Perl_pmruntime(pTHX_ OP *o, OP *expr, bool isreg) cLISTOPx(expr)->op_first->op_sibling == cLISTOPx(expr)->op_last) { /* convert single element list to element */ - OP* oe = expr; + OP* const oe = expr; expr = cLISTOPx(oe)->op_first->op_sibling; cLISTOPx(oe)->op_first->op_sibling = Nullop; cLISTOPx(oe)->op_last = Nullop; @@ -2859,7 +2886,7 @@ Perl_pmruntime(pTHX_ OP *o, OP *expr, bool isreg) else if (repl->op_type == OP_CONST) curop = repl; else { - OP *lastop = 0; + OP *lastop = NULL; for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) { if (PL_opargs[curop->op_type] & OA_DANGEROUS) { if (curop->op_type == OP_GV) { @@ -3028,7 +3055,7 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *idop, OP *arg) veop = Nullop; if (version) { - SV *vesv = ((SVOP*)version)->op_sv; + SV * const vesv = ((SVOP*)version)->op_sv; if (!arg && !SvNIOKp(vesv)) { arg = version; @@ -3044,7 +3071,7 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *idop, OP *arg) pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)idop)->op_sv)); /* Fake up a method call to VERSION */ - meth = newSVpvn_share("VERSION", 7, 0); + meth = newSVpvs_share("VERSION"); veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL, append_elem(OP_LIST, prepend_elem(OP_LIST, pack, list(version)), @@ -3057,6 +3084,8 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *idop, OP *arg) imop = arg; /* no import on explicit () */ else if (SvNIOKp(((SVOP*)idop)->op_sv)) { imop = Nullop; /* use 5.0; */ + if (!aver) + idop->op_private |= OPpCONST_NOVER; } else { SV *meth; @@ -3066,7 +3095,7 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *idop, OP *arg) /* Fake up a method call to import/unimport */ meth = aver - ? newSVpvn_share("import",6, 0) : newSVpvn_share("unimport", 8, 0); + ? newSVpvs_share("import") : newSVpvs_share("unimport"); imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL, append_elem(OP_LIST, prepend_elem(OP_LIST, pack, list(arg)), @@ -3075,7 +3104,7 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *idop, OP *arg) /* Fake up the BEGIN {}, which does its thing immediately. */ newATTRSUB(floor, - newSVOP(OP_CONST, 0, newSVpvn_share("BEGIN", 5, 0)), + newSVOP(OP_CONST, 0, newSVpvs_share("BEGIN")), Nullop, Nullop, append_elem(OP_LINESEQ, @@ -3147,9 +3176,9 @@ Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...) void Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args) { - OP *modname, *veop, *imop; + OP *veop, *imop; - modname = newSVOP(OP_CONST, 0, name); + OP * const modname = newSVOP(OP_CONST, 0, name); modname->op_private |= OPpCONST_BARE; if (ver) { veop = newSVOP(OP_CONST, 0, ver); @@ -3185,14 +3214,18 @@ Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args) } OP * -Perl_dofile(pTHX_ OP *term) +Perl_dofile(pTHX_ OP *term, I32 force_builtin) { OP *doop; - GV *gv; + GV *gv = Nullgv; - gv = gv_fetchpv("do", FALSE, SVt_PVCV); - if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv))) - gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV); + if (!force_builtin) { + gv = gv_fetchpv("do", 0, SVt_PVCV); + if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv))) { + GV * const * const gvp = (GV**)hv_fetch(PL_globalstash, "do", 2, FALSE); + gv = gvp ? *gvp : Nullgv; + } + } if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) { doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED, @@ -3285,15 +3318,6 @@ Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right) /* Result of assignment is always 1 (or we'd be dead already) */ return newSVOP(OP_CONST, 0, newSViv(1)); } - /* optimise C to C, and likewise for hashes */ - if ((left->op_type == OP_PADAV || left->op_type == OP_PADHV) - && right->op_type == OP_STUB - && (left->op_private & OPpLVAL_INTRO)) - { - op_free(right); - left->op_flags &= ~(OPf_REF|OPf_SPECIAL); - return left; - } curop = list(force_list(left)); o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop); o->op_private = (U8)(0 | (flags >> 8)); @@ -3369,7 +3393,7 @@ Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right) if ((tmpop = ((LISTOP*)right)->op_first) && tmpop->op_type == OP_PUSHRE) { - PMOP *pm = (PMOP*)tmpop; + PMOP * const pm = (PMOP*)tmpop; if (left->op_type == OP_RV2AV && !(left->op_private & OPpLVAL_INTRO) && !(o->op_private & OPpASSIGN_COMMON) ) @@ -3480,9 +3504,9 @@ Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o) CopSTASH_set(cop, PL_curstash); if (PERLDB_LINE && PL_curstash != PL_debstash) { - SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE); - if (svp && *svp != &PL_sv_undef ) { - (void)SvIOK_on(*svp); + SV * const * const svp = av_fetch(CopFILEAVx(PL_curcop), (I32)CopLINE(cop), FALSE); + if (svp && *svp != &PL_sv_undef ) { + (void)SvIOK_on(*svp); SvIV_set(*svp, PTR2IV(cop)); } } @@ -3505,7 +3529,7 @@ S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp) LOGOP *logop; OP *o; OP *first = *firstp; - OP *other = *otherp; + OP * const other = *otherp; if (type == OP_XOR) /* Not short circuit, but here by precedence. */ return newBINOP(type, flags, scalar(first), scalar(other)); @@ -3568,8 +3592,8 @@ S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp) else if ((first->op_flags & OPf_KIDS) && type != OP_DOR && ckWARN(WARN_MISC)) /* [#24076] Don't warn for err FOO. */ { - const OP *k1 = ((UNOP*)first)->op_first; - const OP *k2 = k1->op_sibling; + const OP * const k1 = ((UNOP*)first)->op_first; + const OP * const k2 = k1->op_sibling; OPCODE warnop = 0; switch (first->op_type) { @@ -3616,7 +3640,7 @@ S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp) logop->op_type = (OPCODE)type; logop->op_ppaddr = PL_ppaddr[type]; logop->op_first = first; - logop->op_flags = flags | OPf_KIDS; + logop->op_flags = (U8)(flags | OPf_KIDS); logop->op_other = LINKLIST(other); logop->op_private = (U8)(1 | (flags >> 8)); @@ -3649,9 +3673,9 @@ Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop) scalarboolean(first); if (first->op_type == OP_CONST) { if (first->op_private & OPpCONST_BARE && - first->op_private & OPpCONST_STRICT) { - no_bareword_allowed(first); - } + first->op_private & OPpCONST_STRICT) { + no_bareword_allowed(first); + } if (SvTRUE(((SVOP*)first)->op_sv)) { op_free(first); op_free(falseop); @@ -3667,7 +3691,7 @@ Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop) logop->op_type = OP_COND_EXPR; logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR]; logop->op_first = first; - logop->op_flags = flags | OPf_KIDS; + logop->op_flags = (U8)(flags | OPf_KIDS); logop->op_private = (U8)(1 | (flags >> 8)); logop->op_other = LINKLIST(trueop); logop->op_next = LINKLIST(falseop); @@ -3803,35 +3827,37 @@ whileline, OP *expr, OP *block, OP *cont, I32 has_my) { dVAR; OP *redo; - OP *next = 0; + OP *next = NULL; OP *listop; OP *o; U8 loopflags = 0; PERL_UNUSED_ARG(debuggable); - if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB - || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) { - expr = newUNOP(OP_DEFINED, 0, - newASSIGNOP(0, newDEFSVOP(), 0, expr) ); - } else if (expr && (expr->op_flags & OPf_KIDS)) { - const OP * const k1 = ((UNOP*)expr)->op_first; - const OP * const k2 = (k1) ? k1->op_sibling : NULL; - switch (expr->op_type) { - case OP_NULL: - if (k2 && k2->op_type == OP_READLINE - && (k2->op_flags & OPf_STACKED) - && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR)) - expr = newUNOP(OP_DEFINED, 0, expr); - break; + if (expr) { + if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB + || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) { + expr = newUNOP(OP_DEFINED, 0, + newASSIGNOP(0, newDEFSVOP(), 0, expr) ); + } else if (expr->op_flags & OPf_KIDS) { + const OP * const k1 = ((UNOP*)expr)->op_first; + const OP * const k2 = (k1) ? k1->op_sibling : NULL; + switch (expr->op_type) { + case OP_NULL: + if (k2 && k2->op_type == OP_READLINE + && (k2->op_flags & OPf_STACKED) + && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR)) + expr = newUNOP(OP_DEFINED, 0, expr); + 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) - expr = newUNOP(OP_DEFINED, 0, expr); - 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) + expr = newUNOP(OP_DEFINED, 0, expr); + break; + } } } @@ -3845,7 +3871,7 @@ whileline, OP *expr, OP *block, OP *cont, I32 has_my) next = LINKLIST(cont); } if (expr) { - OP *unstack = newOP(OP_UNSTACK, 0); + OP * const unstack = newOP(OP_UNSTACK, 0); if (!next) next = unstack; cont = append_elem(OP_LINESEQ, cont, unstack); @@ -3909,6 +3935,8 @@ Perl_newFOROP(pTHX_ I32 flags, char *label, line_t forline, OP *sv, OP *expr, OP iterpflags = sv->op_private & OPpOUR_INTRO; /* for our $x () */ sv->op_type = OP_RV2GV; sv->op_ppaddr = PL_ppaddr[OP_RV2GV]; + if (cGVOPx_gv(cUNOPx(sv)->op_first) == PL_defgv) + iterpflags |= OPpITER_DEF; } else if (sv->op_type == OP_PADSV) { /* private variable */ iterpflags = sv->op_private & OPpLVAL_INTRO; /* for my $x () */ @@ -3926,6 +3954,8 @@ Perl_newFOROP(pTHX_ I32 flags, char *label, line_t forline, OP *sv, OP *expr, OP } else Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]); + if (padoff && strEQ(PAD_COMPNAME_PV(padoff), "$_")) + iterpflags |= OPpITER_DEF; } else { const I32 offset = pad_findmy("$_"); @@ -3935,6 +3965,7 @@ Perl_newFOROP(pTHX_ I32 flags, char *label, line_t forline, OP *sv, OP *expr, OP else { padoff = offset; } + iterpflags |= OPpITER_DEF; } if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) { expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART); @@ -3948,8 +3979,8 @@ Perl_newFOROP(pTHX_ I32 flags, char *label, line_t forline, OP *sv, OP *expr, OP * set the STACKED flag to indicate that these values are to be * treated as min/max values by 'pp_iterinit'. */ - UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first; - LOGOP* range = (LOGOP*) flip->op_first; + UNOP* const flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first; + LOGOP* const range = (LOGOP*) flip->op_first; OP* const left = range->op_first; OP* const right = left->op_sibling; LISTOP* listop; @@ -4022,6 +4053,177 @@ Perl_newLOOPEX(pTHX_ I32 type, OP *label) return o; } +/* if the condition is a literal array or hash + (or @{ ... } etc), make a reference to it. + */ +STATIC OP * +S_ref_array_or_hash(pTHX_ OP *cond) +{ + if (cond + && (cond->op_type == OP_RV2AV + || cond->op_type == OP_PADAV + || cond->op_type == OP_RV2HV + || cond->op_type == OP_PADHV)) + + return newUNOP(OP_REFGEN, + 0, mod(cond, OP_REFGEN)); + + else + return cond; +} + +/* These construct the optree fragments representing given() + and when() blocks. + + entergiven and enterwhen are LOGOPs; the op_other pointer + points up to the associated leave op. We need this so we + can put it in the context and make break/continue work. + (Also, of course, pp_enterwhen will jump straight to + op_other if the match fails.) + */ + +STATIC +OP * +S_newGIVWHENOP(pTHX_ OP *cond, OP *block, + I32 enter_opcode, I32 leave_opcode, + PADOFFSET entertarg) +{ + LOGOP *enterop; + OP *o; + + NewOp(1101, enterop, 1, LOGOP); + enterop->op_type = enter_opcode; + enterop->op_ppaddr = PL_ppaddr[enter_opcode]; + enterop->op_flags = (U8) OPf_KIDS; + enterop->op_targ = ((entertarg == NOT_IN_PAD) ? 0 : entertarg); + enterop->op_private = 0; + + o = newUNOP(leave_opcode, 0, (OP *) enterop); + + if (cond) { + enterop->op_first = scalar(cond); + cond->op_sibling = block; + + o->op_next = LINKLIST(cond); + cond->op_next = (OP *) enterop; + } + else { + /* This is a default {} block */ + enterop->op_first = block; + enterop->op_flags |= OPf_SPECIAL; + + o->op_next = (OP *) enterop; + } + + CHECKOP(enter_opcode, enterop); /* Currently does nothing, since + entergiven and enterwhen both + use ck_null() */ + + enterop->op_next = LINKLIST(block); + block->op_next = enterop->op_other = o; + + return o; +} + +/* Does this look like a boolean operation? For these purposes + a boolean operation is: + - a subroutine call [*] + - a logical connective + - a comparison operator + - a filetest operator, with the exception of -s -M -A -C + - defined(), exists() or eof() + - /$re/ or $foo =~ /$re/ + + [*] possibly surprising + */ +STATIC +bool +S_looks_like_bool(pTHX_ OP *o) +{ + switch(o->op_type) { + case OP_OR: + return looks_like_bool(cLOGOPo->op_first); + + case OP_AND: + return ( + looks_like_bool(cLOGOPo->op_first) + && looks_like_bool(cLOGOPo->op_first->op_sibling)); + + case OP_ENTERSUB: + + case OP_NOT: case OP_XOR: + /* Note that OP_DOR is not here */ + + case OP_EQ: case OP_NE: case OP_LT: + case OP_GT: case OP_LE: case OP_GE: + + case OP_I_EQ: case OP_I_NE: case OP_I_LT: + case OP_I_GT: case OP_I_LE: case OP_I_GE: + + case OP_SEQ: case OP_SNE: case OP_SLT: + case OP_SGT: case OP_SLE: case OP_SGE: + + case OP_SMARTMATCH: + + case OP_FTRREAD: case OP_FTRWRITE: case OP_FTREXEC: + case OP_FTEREAD: case OP_FTEWRITE: case OP_FTEEXEC: + case OP_FTIS: case OP_FTEOWNED: case OP_FTROWNED: + case OP_FTZERO: case OP_FTSOCK: case OP_FTCHR: + case OP_FTBLK: case OP_FTFILE: case OP_FTDIR: + case OP_FTPIPE: case OP_FTLINK: case OP_FTSUID: + case OP_FTSGID: case OP_FTSVTX: case OP_FTTTY: + case OP_FTTEXT: case OP_FTBINARY: + + case OP_DEFINED: case OP_EXISTS: + case OP_MATCH: case OP_EOF: + + return TRUE; + + case OP_CONST: + /* Detect comparisons that have been optimized away */ + if (cSVOPo->op_sv == &PL_sv_yes + || cSVOPo->op_sv == &PL_sv_no) + + return TRUE; + + /* FALL THROUGH */ + default: + return FALSE; + } +} + +OP * +Perl_newGIVENOP(pTHX_ OP *cond, OP *block, PADOFFSET defsv_off) +{ + assert( cond ); + return newGIVWHENOP( + ref_array_or_hash(cond), + block, + OP_ENTERGIVEN, OP_LEAVEGIVEN, + defsv_off); +} + +/* If cond is null, this is a default {} block */ +OP * +Perl_newWHENOP(pTHX_ OP *cond, OP *block) +{ + bool cond_llb = (!cond || looks_like_bool(cond)); + OP *cond_op; + + if (cond_llb) + cond_op = cond; + else { + cond_op = newBINOP(OP_SMARTMATCH, OPf_SPECIAL, + newDEFSVOP(), + scalar(ref_array_or_hash(cond))); + } + + return newGIVWHENOP( + cond_op, + append_elem(block->op_type, block, newOP(OP_BREAK, OPf_SPECIAL)), + OP_ENTERWHEN, OP_LEAVEWHEN, 0); +} + /* =for apidoc cv_undef @@ -4083,7 +4285,7 @@ void Perl_cv_ckproto(pTHX_ const CV *cv, const GV *gv, const char *p) { if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX_const(cv)))) && ckWARN_d(WARN_PROTOTYPE)) { - SV* msg = sv_newmortal(); + SV* const msg = sv_newmortal(); SV* name = Nullsv; if (gv) @@ -4094,12 +4296,12 @@ Perl_cv_ckproto(pTHX_ const CV *cv, const GV *gv, const char *p) if (SvPOK(cv)) Perl_sv_catpvf(aTHX_ msg, " (%"SVf")", (const SV *)cv); else - Perl_sv_catpv(aTHX_ msg, ": none"); - sv_catpv(msg, " vs "); + sv_catpvs(msg, ": none"); + sv_catpvs(msg, " vs "); if (p) Perl_sv_catpvf(aTHX_ msg, "(%s)", p); else - sv_catpv(msg, "none"); + sv_catpvs(msg, "none"); Perl_warner(aTHX_ packWARN(WARN_PROTOTYPE), "%"SVf, msg); } } @@ -4123,9 +4325,11 @@ L. SV * Perl_cv_const_sv(pTHX_ CV *cv) { - if (!cv || !CvCONST(cv)) - return Nullsv; - return (SV*)CvXSUBANY(cv).any_ptr; + if (!cv) + return NULL; + if (!(SvTYPE(cv) == SVt_PVCV || SvTYPE(cv) == SVt_PVFM)) + return NULL; + return CvCONST(cv) ? (SV*)CvXSUBANY(cv).any_ptr : NULL; } /* op_const_sv: examine an optree to determine whether it's in-lineable. @@ -4234,10 +4438,16 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block) GV *gv; const char *ps; STRLEN ps_len; - register CV *cv=0; + register CV *cv = NULL; SV *const_sv; - I32 gv_fetch_flags; - + /* If the subroutine has no body, no attributes, and no builtin attributes + then it's just a sub declaration, and we may be able to get away with + storing with a placeholder scalar in the symbol table, rather than a + full GV and CV. If anything is present then it will take a full CV to + store it. */ + const I32 gv_fetch_flags + = (block || attrs || (CvFLAGS(PL_compcv) & CVf_BUILTIN_ATTRS)) + ? GV_ADDMULTI : GV_ADDMULTI | GV_NOINIT; const char * const name = o ? SvPVx_nolen_const(cSVOPo->op_sv) : Nullch; if (proto) { @@ -4257,8 +4467,6 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block) else aname = Nullch; - gv_fetch_flags = (block || attrs || (CvFLAGS(PL_compcv) & CVf_BUILTIN_ATTRS)) - ? GV_ADDMULTI : GV_ADDMULTI | GV_NOINIT; gv = name ? gv_fetchsv(cSVOPo->op_sv, gv_fetch_flags, SVt_PVCV) : gv_fetchpv(aname ? aname : (PL_curstash ? "__ANON__" : "__ANON__::__ANON__"), @@ -4330,9 +4538,6 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block) SAVEFREESV(PL_compcv); goto done; } - /* 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) { if (ckWARN(WARN_REDEFINE) || (CvCONST(cv) @@ -4489,13 +4694,12 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block) if (name || aname) { const char *s; - const char *tname = (name ? name : aname); + const char * const tname = (name ? name : aname); if (PERLDB_SUBLINE && PL_curstash != PL_debstash) { - SV *sv = NEWSV(0,0); - SV *tmpstr = sv_newmortal(); - GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV); - CV *pcv; + SV * const sv = NEWSV(0,0); + SV * const tmpstr = sv_newmortal(); + GV * const db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV); HV *hv; Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld", @@ -4504,14 +4708,15 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block) gv_efullname3(tmpstr, gv, Nullch); hv_store(GvHV(PL_DBsub), SvPVX_const(tmpstr), SvCUR(tmpstr), sv, 0); hv = GvHVn(db_postponed); - if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX_const(tmpstr), SvCUR(tmpstr)) - && (pcv = GvCV(db_postponed))) - { - dSP; - PUSHMARK(SP); - XPUSHs(tmpstr); - PUTBACK; - call_sv((SV*)pcv, G_DISCARD); + if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX_const(tmpstr), SvCUR(tmpstr))) { + CV * const pcv = GvCV(db_postponed); + if (pcv) { + dSP; + PUSHMARK(SP); + XPUSHs(tmpstr); + PUTBACK; + call_sv((SV*)pcv, G_DISCARD); + } } } @@ -4611,9 +4816,10 @@ Perl_newCONSTSUB(pTHX_ HV *stash, const char *name, SV *sv) CvCONST_on(cv); sv_setpvn((SV*)cv, "", 0); /* prototype is "" */ +#ifdef USE_ITHREADS if (stash) CopSTASH_free(PL_curcop); - +#endif LEAVE; return cv; @@ -4740,13 +4946,11 @@ void Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block) { register CV *cv; - GV *gv; - if (o) - gv = gv_fetchsv(cSVOPo->op_sv, TRUE, SVt_PVFM); - else - gv = gv_fetchpv("STDOUT", TRUE, SVt_PVFM); - + GV * const gv = o + ? gv_fetchsv(cSVOPo->op_sv, GV_ADD, SVt_PVFM) + : gv_fetchpv("STDOUT", GV_ADD, SVt_PVFM); + #ifdef GV_UNIQUE_CHECK if (GvUNIQUE(gv)) { Perl_croak(aTHX_ "Bad symbol for form (GV is unique)"); @@ -4904,15 +5108,6 @@ Perl_newHVREF(pTHX_ OP *o) } OP * -Perl_oopsCV(pTHX_ OP *o) -{ - Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__); - /* STUB */ - PERL_UNUSED_ARG(o); - NORETURN_FUNCTION_END; -} - -OP * Perl_newCVREF(pTHX_ I32 flags, OP *o) { return newUNOP(OP_RV2CV, flags, scalar(o)); @@ -4981,7 +5176,7 @@ Perl_ck_bitop(pTHX_ OP *o) OP * Perl_ck_concat(pTHX_ OP *o) { - const OP *kid = cUNOPo->op_first; + const OP * const kid = cUNOPo->op_first; if (kid->op_type == OP_CONCAT && !(kid->op_private & OPpTARGET_MY) && !(kUNOP->op_first->op_flags & OPf_MOD)) o->op_flags |= OPf_STACKED; @@ -5020,7 +5215,7 @@ Perl_ck_delete(pTHX_ OP *o) o = ck_fun(o); o->op_private = 0; if (o->op_flags & OPf_KIDS) { - OP *kid = cUNOPo->op_first; + OP * const kid = cUNOPo->op_first; switch (kid->op_type) { case OP_ASLICE: o->op_flags |= OPf_SPECIAL; @@ -5108,6 +5303,12 @@ Perl_ck_eval(pTHX_ OP *o) o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP()); } o->op_targ = (PADOFFSET)PL_hints; + if ((PL_hints & HINT_LOCALIZE_HH) != 0 && GvHV(PL_hintgv)) { + /* Store a copy of %^H that pp_entereval can pick up */ + OP *hhop = newSVOP(OP_CONST, 0, (SV*)newHVhv(GvHV(PL_hintgv))); + cUNOPo->op_first->op_sibling = hhop; + o->op_private |= OPpEVAL_HAS_HH; + } return o; } @@ -5115,9 +5316,9 @@ OP * Perl_ck_exit(pTHX_ OP *o) { #ifdef VMS - HV *table = GvHV(PL_hintgv); + HV * const table = GvHV(PL_hintgv); if (table) { - SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE); + SV * const * const svp = hv_fetch(table, "vmsish_exit", 11, FALSE); if (svp && *svp && SvTRUE(*svp)) o->op_private |= OPpEXIT_VMSISH; } @@ -5168,9 +5369,12 @@ OP * Perl_ck_rvconst(pTHX_ register OP *o) { dVAR; - SVOP *kid = (SVOP*)cUNOPo->op_first; + SVOP * const kid = (SVOP*)cUNOPo->op_first; o->op_private |= (PL_hints & HINT_STRICT_REFS); + if (o->op_type == OP_RV2CV) + o->op_private &= ~1; + if (kid->op_type == OP_CONST) { int iscv; GV *gv; @@ -5178,7 +5382,7 @@ Perl_ck_rvconst(pTHX_ register OP *o) /* Is it a constant from cv_const_sv()? */ if (SvROK(kidsv) && SvREADONLY(kidsv)) { - SV *rsv = SvRV(kidsv); + SV * const rsv = SvRV(kidsv); const int svtype = SvTYPE(rsv); const char *badtype = Nullch; @@ -5204,7 +5408,18 @@ Perl_ck_rvconst(pTHX_ register OP *o) Perl_croak(aTHX_ "Constant is not %s reference", badtype); return o; } - if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) { + else if ((o->op_type == OP_RV2HV || o->op_type == OP_RV2SV) && + (PL_hints & HINT_STRICT_REFS) && SvPOK(kidsv)) { + /* If this is an access to a stash, disable "strict refs", because + * stashes aren't auto-vivified at compile-time (unless we store + * symbols in them), and we don't want to produce a run-time + * stricture error when auto-vivifying the stash. */ + const char *s = SvPV_nolen(kidsv); + const STRLEN l = SvCUR(kidsv); + if (l > 1 && s[l-1] == ':' && s[l-2] == ':') + o->op_private &= ~HINT_STRICT_REFS; + } + if ((o->op_private & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) { const char *badthing = Nullch; switch (o->op_type) { case OP_RV2SV: @@ -5273,11 +5488,11 @@ Perl_ck_ftst(pTHX_ OP *o) /* nothing */ } else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) { - SVOP *kid = (SVOP*)cUNOPo->op_first; + SVOP * const kid = (SVOP*)cUNOPo->op_first; if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) { - OP *newop = newGVOP(type, OPf_REF, - gv_fetchsv(kid->op_sv, TRUE, SVt_PVIO)); + OP * const newop = newGVOP(type, OPf_REF, + gv_fetchsv(kid->op_sv, GV_ADD, SVt_PVIO)); op_free(o); o = newop; return o; @@ -5360,8 +5575,8 @@ Perl_ck_fun(pTHX_ OP *o) if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) { - OP *newop = newAVREF(newGVOP(OP_GV, 0, - gv_fetchsv(((SVOP*)kid)->op_sv, TRUE, SVt_PVAV) )); + OP * const newop = newAVREF(newGVOP(OP_GV, 0, + gv_fetchsv(((SVOP*)kid)->op_sv, GV_ADD, SVt_PVAV) )); if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), "Array @%"SVf" missing the @ in argument %"IVdf" of %s()", @@ -5379,8 +5594,8 @@ Perl_ck_fun(pTHX_ OP *o) if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) { - OP *newop = newHVREF(newGVOP(OP_GV, 0, - gv_fetchsv(((SVOP*)kid)->op_sv, TRUE, SVt_PVHV) )); + OP * const newop = newHVREF(newGVOP(OP_GV, 0, + gv_fetchsv(((SVOP*)kid)->op_sv, GV_ADD, SVt_PVHV) )); if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), "Hash %%%"SVf" missing the %% in argument %"IVdf" of %s()", @@ -5396,7 +5611,7 @@ Perl_ck_fun(pTHX_ OP *o) break; case OA_CVREF: { - OP *newop = newUNOP(OP_NULL, 0, kid); + OP * const newop = newUNOP(OP_NULL, 0, kid); kid->op_sibling = 0; linklist(kid); newop->op_next = newop; @@ -5410,8 +5625,8 @@ Perl_ck_fun(pTHX_ OP *o) if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) { - OP *newop = newGVOP(OP_GV, 0, - gv_fetchsv(((SVOP*)kid)->op_sv, TRUE, SVt_PVIO) ); + OP * const newop = newGVOP(OP_GV, 0, + gv_fetchsv(((SVOP*)kid)->op_sv, GV_ADD, SVt_PVIO)); if (!(o->op_private & 1) && /* if not unop */ kid == cLISTOPo->op_last) cLISTOPo->op_last = newop; @@ -5450,19 +5665,18 @@ Perl_ck_fun(pTHX_ OP *o) else if (kid->op_type == OP_RV2SV && kUNOP->op_first->op_type == OP_GV) { - GV *gv = cGVOPx_gv(kUNOP->op_first); + GV * const gv = cGVOPx_gv(kUNOP->op_first); name = GvNAME(gv); len = GvNAMELEN(gv); } else if (kid->op_type == OP_AELEM || kid->op_type == OP_HELEM) { - OP *op; - + OP *op = ((BINOP*)kid)->op_first; name = 0; - if ((op = ((BINOP*)kid)->op_first)) { + if (op) { SV *tmpstr = Nullsv; - const char *a = + const char * const a = kid->op_type == OP_AELEM ? "[]" : "{}"; if (((op->op_type == OP_RV2AV) || @@ -5470,7 +5684,7 @@ Perl_ck_fun(pTHX_ OP *o) (op = ((UNOP*)op)->op_first) && (op->op_type == OP_GV)) { /* packagevar $a[] or $h{} */ - GV *gv = cGVOPx_gv(op); + GV * const gv = cGVOPx_gv(op); if (gv) tmpstr = Perl_newSVpvf(aTHX_ @@ -5481,7 +5695,7 @@ Perl_ck_fun(pTHX_ OP *o) else if (op->op_type == OP_PADAV || op->op_type == OP_PADHV) { /* lexicalvar $a[] or $h{} */ - const char *padname = + const char * const padname = PAD_COMPNAME_PV(op->op_targ); if (padname) tmpstr = @@ -5489,7 +5703,6 @@ Perl_ck_fun(pTHX_ OP *o) "%s%c...%c", padname + 1, a[0], a[1]); - } if (tmpstr) { name = SvPV_const(tmpstr, len); @@ -5559,10 +5772,10 @@ Perl_ck_glob(pTHX_ OP *o) if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling) append_elem(OP_GLOB, o, newDEFSVOP()); - if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) + if (!((gv = gv_fetchpv("glob", 0, SVt_PVCV)) && GvCVu(gv) && GvIMPORTED_CV(gv))) { - gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV); + gv = gv_fetchpv("CORE::GLOBAL::glob", 0, SVt_PVCV); } #if !defined(PERL_EXTERNAL_GLOB) @@ -5571,9 +5784,9 @@ Perl_ck_glob(pTHX_ OP *o) GV *glob_gv; ENTER; Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, - newSVpvn("File::Glob", 10), Nullsv, Nullsv, Nullsv); - gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV); - glob_gv = gv_fetchpv("File::Glob::csh_glob", FALSE, SVt_PVCV); + newSVpvs("File::Glob"), Nullsv, Nullsv, Nullsv); + gv = gv_fetchpv("CORE::GLOBAL::glob", 0, SVt_PVCV); + glob_gv = gv_fetchpv("File::Glob::csh_glob", 0, SVt_PVCV); GvCV(gv) = GvCV(glob_gv); (void)SvREFCNT_inc((SV*)GvCV(gv)); GvIMPORTED_CV_on(gv); @@ -5769,6 +5982,43 @@ Perl_ck_listiob(pTHX_ OP *o) } OP * +Perl_ck_say(pTHX_ OP *o) +{ + o = ck_listiob(o); + o->op_type = OP_PRINT; + cLISTOPo->op_last = cLISTOPo->op_last->op_sibling + = newSVOP(OP_CONST, 0, newSVpvs("\n")); + return o; +} + +OP * +Perl_ck_smartmatch(pTHX_ OP *o) +{ + if (0 == (o->op_flags & OPf_SPECIAL)) { + OP *first = cBINOPo->op_first; + OP *second = first->op_sibling; + + /* Implicitly take a reference to an array or hash */ + first->op_sibling = Nullop; + first = cBINOPo->op_first = ref_array_or_hash(first); + second = first->op_sibling = ref_array_or_hash(second); + + /* Implicitly take a reference to a regular expression */ + if (first->op_type == OP_MATCH) { + first->op_type = OP_QR; + first->op_ppaddr = PL_ppaddr[OP_QR]; + } + if (second->op_type == OP_MATCH) { + second->op_type = OP_QR; + second->op_ppaddr = PL_ppaddr[OP_QR]; + } + } + + return o; +} + + +OP * Perl_ck_sassign(pTHX_ OP *o) { OP *kid = cLISTOPo->op_first; @@ -5778,7 +6028,7 @@ Perl_ck_sassign(pTHX_ OP *o) /* Cannot steal the second time! */ && !(kid->op_private & OPpTARGET_MY)) { - OP *kkid = kid->op_sibling; + OP * const kkid = kid->op_sibling; /* Can just relocate the target. */ if (kkid && kkid->op_type == OP_PADSV @@ -5795,26 +6045,13 @@ Perl_ck_sassign(pTHX_ OP *o) return kid; } } - /* optimise C to C */ - if (kid->op_type == OP_UNDEF) { - OP *kkid = kid->op_sibling; - if (kkid && kkid->op_type == OP_PADSV - && (kkid->op_private & OPpLVAL_INTRO)) - { - cLISTOPo->op_first = NULL; - kid->op_sibling = NULL; - op_free(o); - op_free(kid); - return kkid; - } - } return o; } OP * Perl_ck_match(pTHX_ OP *o) { - if (o->op_type != OP_QR) { + if (o->op_type != OP_QR && PL_compcv) { const I32 offset = pad_findmy("$_"); if (offset != NOT_IN_PAD && !(PAD_COMPNAME_FLAGS(offset) & SVpad_OUR)) { o->op_targ = offset; @@ -5829,7 +6066,7 @@ Perl_ck_match(pTHX_ OP *o) OP * Perl_ck_method(pTHX_ OP *o) { - OP *kid = cUNOPo->op_first; + OP * const kid = cUNOPo->op_first; if (kid->op_type == OP_CONST) { SV* sv = kSVOP->op_sv; if (!(strchr(SvPVX_const(sv), ':') || strchr(SvPVX_const(sv), '\''))) { @@ -5857,13 +6094,11 @@ Perl_ck_null(pTHX_ OP *o) OP * Perl_ck_open(pTHX_ OP *o) { - HV *table = GvHV(PL_hintgv); + HV * const table = GvHV(PL_hintgv); if (table) { - SV **svp; - I32 mode; - svp = hv_fetch(table, "open_IN", 7, FALSE); + SV **svp = hv_fetch(table, "open_IN", 7, FALSE); if (svp && *svp) { - mode = mode_from_discipline(*svp); + const I32 mode = mode_from_discipline(*svp); if (mode & O_BINARY) o->op_private |= OPpOPEN_IN_RAW; else if (mode & O_TEXT) @@ -5872,7 +6107,7 @@ Perl_ck_open(pTHX_ OP *o) svp = hv_fetch(table, "open_OUT", 8, FALSE); if (svp && *svp) { - mode = mode_from_discipline(*svp); + const I32 mode = mode_from_discipline(*svp); if (mode & O_BINARY) o->op_private |= OPpOPEN_OUT_RAW; else if (mode & O_TEXT) @@ -5884,8 +6119,8 @@ Perl_ck_open(pTHX_ OP *o) { /* In case of three-arg dup open remove strictness * from the last arg if it is a bareword. */ - OP *first = cLISTOPx(o)->op_first; /* The pushmark. */ - OP *last = cLISTOPx(o)->op_last; /* The bareword. */ + OP * const first = cLISTOPx(o)->op_first; /* The pushmark. */ + OP * const last = cLISTOPx(o)->op_last; /* The bareword. */ OP *oa; const char *mode; @@ -5894,6 +6129,7 @@ Perl_ck_open(pTHX_ OP *o) (last->op_private & OPpCONST_STRICT) && (oa = first->op_sibling) && /* The fh. */ (oa = oa->op_sibling) && /* The mode. */ + (oa->op_type == OP_CONST) && SvPOK(((SVOP*)oa)->op_sv) && (mode = SvPVX_const(((SVOP*)oa)->op_sv)) && mode[0] == '>' && mode[1] == '&' && /* A dup open. */ @@ -5918,13 +6154,13 @@ Perl_ck_repeat(pTHX_ OP *o) OP * Perl_ck_require(pTHX_ OP *o) { - GV* gv; + GV* gv = Nullgv; if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */ - SVOP *kid = (SVOP*)cUNOPo->op_first; + SVOP * const kid = (SVOP*)cUNOPo->op_first; if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) { - SV *sv = kid->op_sv; + SV * const sv = kid->op_sv; U32 was_readonly = SvREADONLY(sv); char *s; @@ -5940,23 +6176,28 @@ Perl_ck_require(pTHX_ OP *o) for (s = SvPVX(sv); *s; s++) { if (*s == ':' && s[1] == ':') { + const STRLEN len = strlen(s+2)+1; *s = '/'; - Move(s+2, s+1, strlen(s+2)+1, char); + Move(s+2, s+1, len, char); SvCUR_set(sv, SvCUR(sv) - 1); } } - sv_catpvn(sv, ".pm", 3); + sv_catpvs(sv, ".pm"); SvFLAGS(sv) |= was_readonly; } } - /* handle override, if any */ - gv = gv_fetchpv("require", FALSE, SVt_PVCV); - if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv))) - gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV); + if (!(o->op_flags & OPf_SPECIAL)) { /* Wasn't written as CORE::require */ + /* handle override, if any */ + gv = gv_fetchpv("require", 0, SVt_PVCV); + if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv))) { + GV * const * const gvp = (GV**)hv_fetch(PL_globalstash, "require", 7, FALSE); + gv = gvp ? *gvp : Nullgv; + } + } if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) { - OP *kid = cUNOPo->op_first; + OP * const kid = cUNOPo->op_first; cUNOPo->op_first = 0; op_free(o); return ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED, @@ -5980,16 +6221,6 @@ Perl_ck_return(pTHX_ OP *o) return o; } -#if 0 -OP * -Perl_ck_retarget(pTHX_ OP *o) -{ - Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__); - /* STUB */ - return o; -} -#endif - OP * Perl_ck_select(pTHX_ OP *o) { @@ -6032,6 +6263,21 @@ Perl_ck_sort(pTHX_ OP *o) { OP *firstkid; + if (o->op_type == OP_SORT && (PL_hints & HINT_LOCALIZE_HH) != 0) + { + HV *hinthv = GvHV(PL_hintgv); + if (hinthv) { + SV **svp = hv_fetch(hinthv, "sort", 4, 0); + if (svp) { + I32 sorthints = (I32)SvIV(*svp); + if ((sorthints & HINT_SORT_QUICKSORT) != 0) + o->op_private |= OPpSORT_QSORT; + if ((sorthints & HINT_SORT_STABLE) != 0) + o->op_private |= OPpSORT_STABLE; + } + } + } + if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED) simplify_sort(o); firstkid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ @@ -6100,8 +6346,8 @@ S_simplify_sort(pTHX_ OP *o) const char *gvname; if (!(o->op_flags & OPf_STACKED)) return; - GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV)); - GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV)); + GvMULTI_on(gv_fetchpv("a", GV_ADD, SVt_PV)); + GvMULTI_on(gv_fetchpv("b", GV_ADD, SVt_PV)); kid = kUNOP->op_first; /* get past null */ if (kid->op_type != OP_SCOPE) return; @@ -6175,12 +6421,12 @@ Perl_ck_split(pTHX_ OP *o) op_free(cLISTOPo->op_first); cLISTOPo->op_first = kid; if (!kid) { - cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1)); + cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvs(" ")); cLISTOPo->op_last = kid; /* There was only one element previously */ } if (kid->op_type != OP_MATCH || kid->op_flags & OPf_STACKED) { - OP *sibl = kid->op_sibling; + OP * const sibl = kid->op_sibling; kid->op_sibling = 0; kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, 0); if (cLISTOPo->op_first == cLISTOPo->op_last) @@ -6218,7 +6464,7 @@ Perl_ck_split(pTHX_ OP *o) OP * Perl_ck_join(pTHX_ OP *o) { - const OP *kid = cLISTOPo->op_first->op_sibling; + const OP * const kid = cLISTOPo->op_first->op_sibling; if (kid && kid->op_type == OP_MATCH) { if (ckWARN(WARN_SYNTAX)) { const REGEXP *re = PM_GETRE(kPMOP); @@ -6238,13 +6484,13 @@ Perl_ck_subr(pTHX_ OP *o) ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first; OP *o2 = prev->op_sibling; OP *cvop; - char *proto = 0; - CV *cv = 0; - GV *namegv = 0; + char *proto = NULL; + CV *cv = NULL; + GV *namegv = NULL; int optional = 0; I32 arg = 0; I32 contextclass = 0; - char *e = 0; + char *e = NULL; bool delete_op = 0; o->op_private |= OPpENTERSUB_HASTARG; @@ -6284,7 +6530,7 @@ Perl_ck_subr(pTHX_ OP *o) if (o2->op_type == OP_CONST) o2->op_private &= ~OPpCONST_STRICT; else if (o2->op_type == OP_LIST) { - OP *o = ((UNOP*)o2)->op_first->op_sibling; + OP * const o = ((UNOP*)o2)->op_first->op_sibling; if (o && o->op_type == OP_CONST) o->op_private &= ~OPpCONST_STRICT; } @@ -6340,9 +6586,9 @@ Perl_ck_subr(pTHX_ OP *o) (gvop = ((UNOP*)gvop)->op_first) && gvop->op_type == OP_GV) { - GV *gv = cGVOPx_gv(gvop); - OP *sibling = o2->op_sibling; - SV *n = newSVpvn("",0); + GV * const gv = cGVOPx_gv(gvop); + OP * const sibling = o2->op_sibling; + SV * const n = newSVpvs(""); op_free(o2); gv_fullname4(n, gv, "", FALSE); o2 = newSVOP(OP_CONST, 0, n); @@ -6374,6 +6620,7 @@ Perl_ck_subr(pTHX_ OP *o) break; case ']': if (contextclass) { + /* XXX We shouldn't be modifying proto, so we can const proto */ char *p = proto; const char s = *p; contextclass = 0; @@ -6423,8 +6670,8 @@ Perl_ck_subr(pTHX_ OP *o) break; wrapref: { - OP* kid = o2; - OP* sib = kid->op_sibling; + OP* const kid = o2; + OP* const sib = kid->op_sibling; kid->op_sibling = 0; o2 = newUNOP(OP_REFGEN, 0, kid); o2->op_sibling = sib; @@ -6454,7 +6701,7 @@ Perl_ck_subr(pTHX_ OP *o) mod(o2, OP_ENTERSUB); prev = o2; o2 = o2->op_sibling; - } + } /* while */ if (proto && !optional && (*proto && *proto != '@' && *proto != '%' && *proto != ';')) return too_few_arguments(o, gv_ename(namegv)); @@ -6526,7 +6773,7 @@ void Perl_peep(pTHX_ register OP *o) { dVAR; - register OP* oldop = 0; + register OP* oldop = NULL; if (!o || o->op_opt) return; @@ -6562,6 +6809,18 @@ Perl_peep(pTHX_ register OP *o) SvREADONLY_on(PAD_SVl(ix)); SvREFCNT_dec(cSVOPo->op_sv); } + else if (o->op_type == OP_CONST + && cSVOPo->op_sv == &PL_sv_undef) { + /* PL_sv_undef is hack - it's unsafe to store it in the + AV that is the pad, because av_fetch treats values of + PL_sv_undef as a "free" AV entry and will merrily + replace them with a new SV, causing pad_alloc to think + that this pad slot is free. (When, clearly, it is not) + */ + SvOK_off(PAD_SVl(ix)); + SvPADTMP_on(PAD_SVl(ix)); + SvREADONLY_on(PAD_SVl(ix)); + } else { SvREFCNT_dec(PAD_SVl(ix)); SvPADTMP_on(cSVOPo->op_sv); @@ -6630,7 +6889,7 @@ Perl_peep(pTHX_ register OP *o) case OP_PADAV: case OP_GV: if (o->op_type == OP_PADAV || o->op_next->op_type == OP_RV2AV) { - OP* pop = (o->op_type == OP_PADAV) ? + OP* const pop = (o->op_type == OP_PADAV) ? o->op_next : o->op_next->op_next; IV i; if (pop && pop->op_type == OP_CONST && @@ -6676,10 +6935,10 @@ Perl_peep(pTHX_ register OP *o) } } else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) { - GV *gv = cGVOPo_gv; + GV * const gv = cGVOPo_gv; if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX_const(GvCV(gv))) { /* XXX could check prototype here instead of just carping */ - SV *sv = sv_newmortal(); + SV * const sv = sv_newmortal(); gv_efullname3(sv, gv, Nullch); Perl_warner(aTHX_ packWARN(WARN_PROTOTYPE), "%"SVf"() called too early to check prototype", @@ -6869,22 +7128,22 @@ Perl_peep(pTHX_ register OP *o) case OP_SORT: { /* will point to RV2AV or PADAV op on LHS/RHS of assign */ - OP *oleft, *oright; + OP *oleft; OP *o2; /* check that RHS of sort is a single plain array */ - oright = cUNOPo->op_first; + OP *oright = cUNOPo->op_first; if (!oright || oright->op_type != OP_PUSHMARK) break; /* reverse sort ... can be optimised. */ if (!cUNOPo->op_sibling) { /* Nothing follows us on the list. */ - OP *reverse = o->op_next; + OP * const reverse = o->op_next; if (reverse->op_type == OP_REVERSE && (reverse->op_flags & OPf_WANT) == OPf_WANT_LIST) { - OP *pushmark = cUNOPx(reverse)->op_first; + OP * const pushmark = cUNOPx(reverse)->op_first; if (pushmark && (pushmark->op_type == OP_PUSHMARK) && (cUNOPx(pushmark)->op_sibling == o)) { /* reverse -> pushmark -> sort */ @@ -7075,6 +7334,58 @@ Perl_peep(pTHX_ register OP *o) break; } + + case OP_SASSIGN: { + OP *rv2gv; + UNOP *refgen, *rv2cv; + LISTOP *exlist; + + /* I do not understand this, but if o->op_opt isn't set to 1, + various tests in ext/B/t/bytecode.t fail with no readily + apparent cause. */ + + o->op_opt = 1; + + + if ((o->op_flags && OPf_WANT) != OPf_WANT_VOID) + break; + + if ((o->op_private & ~OPpASSIGN_BACKWARDS) != 2) + break; + + rv2gv = ((BINOP *)o)->op_last; + if (!rv2gv || rv2gv->op_type != OP_RV2GV) + break; + + refgen = (UNOP *)((BINOP *)o)->op_first; + + if (!refgen || refgen->op_type != OP_REFGEN) + break; + + exlist = (LISTOP *)refgen->op_first; + if (!exlist || exlist->op_type != OP_NULL + || exlist->op_targ != OP_LIST) + break; + + if (exlist->op_first->op_type != OP_PUSHMARK) + break; + + rv2cv = (UNOP*)exlist->op_last; + + if (rv2cv->op_type != OP_RV2CV) + break; + + assert ((rv2gv->op_private & OPpDONT_INIT_GV) == 0); + assert ((o->op_private & OPpASSIGN_CV_TO_GV) == 0); + assert ((rv2cv->op_private & OPpMAY_RETURN_CONSTANT) == 0); + + o->op_private |= OPpASSIGN_CV_TO_GV; + rv2gv->op_private |= OPpDONT_INIT_GV; + rv2cv->op_private |= OPpMAY_RETURN_CONSTANT; + + break; + } + default: o->op_opt = 1;