# License or the Artistic License, as specified in the README file.
#
package B::Bytecode;
+
use strict;
use Carp;
-use IO::File;
-
-use B qw(minus_c main_cv main_root main_start comppadlist
+use B qw(main_cv main_root main_start comppadlist
class peekop walkoptree svref_2object cstring walksymtable
- SVf_POK SVp_POK SVf_IOK SVp_IOK
+ init_av begin_av end_av
+ SVf_POK SVp_POK SVf_IOK SVp_IOK SVf_NOK SVp_NOK
+ SVf_READONLY GVf_IMPORTED_AV GVf_IMPORTED_CV GVf_IMPORTED_HV
+ GVf_IMPORTED_SV SVTYPEMASK
);
use B::Asmdata qw(@optype @specialsv_name);
-use B::Assembler qw(assemble_fh);
+use B::Assembler qw(newasm endasm assemble);
my %optype_enum;
my $i;
# XXX Shouldn't be hardwired
sub IOK () { SVf_IOK|SVp_IOK }
-my ($verbose, $module_only, $no_assemble, $debug_bc, $debug_cv);
-my $assembler_pid;
+# Following is SVf_NOK|SVp_NOK
+# XXX Shouldn't be hardwired
+sub NOK () { SVf_NOK|SVp_NOK }
+
+# nonexistant flags (see B::GV::bytecode for usage)
+sub GVf_IMPORTED_IO () { 0; }
+sub GVf_IMPORTED_FORM () { 0; }
+
+my ($verbose, $no_assemble, $debug_bc, $debug_cv);
+my @packages; # list of packages to compile
+
+sub asm (@) { # print replacement that knows about assembling
+ if ($no_assemble) {
+ print @_;
+ } else {
+ my $buf = join '', @_;
+ assemble($_) for (split /\n/, $buf);
+ }
+}
+
+sub asmf (@) { # printf replacement that knows about assembling
+ if ($no_assemble) {
+ printf shift(), @_;
+ } else {
+ my $format = shift;
+ my $buf = sprintf $format, @_;
+ assemble($_) for (split /\n/, $buf);
+ }
+}
# Optimisation options. On the command line, use hyphens instead of
# underscores for compatibility with gcc-style options. We use
# underscores here because they are OK in (strict) barewords.
-my ($strip_syntree, $compress_nullops, $omit_seq, $bypass_nullops);
-my %optimise = (strip_syntax_tree => \$strip_syntree,
- compress_nullops => \$compress_nullops,
+my ($compress_nullops, $omit_seq, $bypass_nullops);
+my %optimise = (compress_nullops => \$compress_nullops,
omit_sequence_numbers => \$omit_seq,
bypass_nullops => \$bypass_nullops);
+my $strip_syntree; # this is left here in case stripping the
+ # syntree ever becomes safe again
+ # -- BKS, June 2000
+
my $nextix = 0;
my %symtable; # maps object addresses to object indices.
# Filled in at allocation (newsv/newop) time.
+
my %saved; # maps object addresses (for SVish classes) to "saved yet?"
# flag. Set at FOO::bytecode time usually by SV::bytecode.
# Manipulated via saved(), mark_saved(), unmark_saved().
+my %strtable; # maps shared strings to object indices
+ # Filled in at allocation (pvix) time
+
my $svix = -1; # we keep track of when the sv register contains an element
# of the object table to avoid unnecessary repeated
# consecutive ldsv instructions.
+
my $opix = -1; # Ditto for the op register.
sub ldsv {
my $ix = shift;
if ($ix != $svix) {
- print "ldsv $ix\n";
+ asm "ldsv $ix\n";
$svix = $ix;
}
}
sub stsv {
my $ix = shift;
- print "stsv $ix\n";
+ asm "stsv $ix\n";
$svix = $ix;
}
sub ldop {
my $ix = shift;
if ($ix != $opix) {
- print "ldop $ix\n";
+ asm "ldop $ix\n";
$opix = $ix;
}
}
sub stop {
my $ix = shift;
- print "stop $ix\n";
+ asm "stop $ix\n";
$opix = $ix;
}
}
}
+sub nv {
+ # print full precision
+ my $str = sprintf "%.40f", $_[0];
+ $str =~ s/0+$//; # remove trailing zeros
+ $str =~ s/\.$/.0/;
+ return $str;
+}
+
sub saved { $saved{${$_[0]}} }
sub mark_saved { $saved{${$_[0]}} = 1 }
sub unmark_saved { $saved{${$_[0]}} = 0 }
sub debug { $debug_bc = shift }
+sub pvix { # save a shared PV (mainly for COPs)
+ return $strtable{$_[0]} if defined($strtable{$_[0]});
+ asmf "newpv %s\n", pvstring($_[0]);
+ my $ix = $nextix++;
+ $strtable{$_[0]} = $ix;
+ asmf "stpv %d\n", $ix;
+ return $ix;
+}
+
sub B::OBJECT::nyi {
my $obj = shift;
warn sprintf("bytecode save method for %s (0x%x) not yet implemented\n",
sub B::SV::newix {
my ($sv, $ix) = @_;
- printf "newsv %d\t# %s\n", $sv->FLAGS & 0xf, class($sv);
+ asmf "newsv %d\t# %s\n", $sv->FLAGS & SVTYPEMASK, class($sv);
stsv($ix);
}
my ($gv, $ix) = @_;
my $gvname = $gv->NAME;
my $name = cstring($gv->STASH->NAME . "::" . $gvname);
- print "gv_fetchpv $name\n";
+ asm "gv_fetchpv $name\n";
stsv($ix);
}
my $name = $hv->NAME;
if ($name) {
# It's a stash
- printf "gv_stashpv %s\n", cstring($name);
+ asmf "gv_stashpv %s\n", cstring($name);
stsv($ix);
} else {
# It's an ordinary HV. Fall back to ordinary newix method
my ($sv, $ix) = @_;
# Special case. $$sv is not the address of the SV but an
# index into svspecialsv_list.
- printf "ldspecsv $$sv\t# %s\n", $specialsv_name[$$sv];
+ asmf "ldspecsv $$sv\t# %s\n", $specialsv_name[$$sv];
stsv($ix);
}
my ($op, $ix) = @_;
my $class = class($op);
my $typenum = $optype_enum{$class};
- croak "OP::newix: can't understand class $class" unless defined($typenum);
- print "newop $typenum\t# $class\n";
+ croak("OP::newix: can't understand class $class") unless defined($typenum);
+ asm "newop $typenum\t# $class\n";
stop($ix);
}
my $op = shift;
my $next = $op->next;
my $nextix;
- my $sibix = $op->sibling->objix;
+ my $sibix = $op->sibling->objix unless $strip_syntree;
my $ix = $op->objix;
my $type = $op->type;
}
$nextix = $next->objix;
- printf "# %s\n", peekop($op) if $debug_bc;
+ asmf "# %s\n", peekop($op) if $debug_bc;
ldop($ix);
- print "op_next $nextix\n";
- print "op_sibling $sibix\n" unless $strip_syntree;
- printf "op_type %s\t# %d\n", "pp_" . $op->name, $type;
- printf("op_seq %d\n", $op->seq) unless $omit_seq;
+ asm "op_next $nextix\n";
+ asm "op_sibling $sibix\n" unless $strip_syntree;
+ asmf "op_type %s\t# %d\n", "pp_" . $op->name, $type;
+ asmf("op_seq %d\n", $op->seq) unless $omit_seq;
if ($type || !$compress_nullops) {
- printf "op_targ %d\nop_flags 0x%x\nop_private 0x%x\n",
+ asmf "op_targ %d\nop_flags 0x%x\nop_private 0x%x\n",
$op->targ, $op->flags, $op->private;
}
}
sub B::UNOP::bytecode {
my $op = shift;
- my $firstix = $op->first->objix;
+ my $firstix = $op->first->objix unless $strip_syntree;
$op->B::OP::bytecode;
if (($op->type || !$compress_nullops) && !$strip_syntree) {
- print "op_first $firstix\n";
+ asm "op_first $firstix\n";
}
}
my $op = shift;
my $otherix = $op->other->objix;
$op->B::UNOP::bytecode;
- print "op_other $otherix\n";
+ asm "op_other $otherix\n";
}
sub B::SVOP::bytecode {
my $sv = $op->sv;
my $svix = $sv->objix;
$op->B::OP::bytecode;
- print "op_sv $svix\n";
+ asm "op_sv $svix\n";
$sv->bytecode;
}
my $op = shift;
my $padix = $op->padix;
$op->B::OP::bytecode;
- print "op_padix $padix\n";
+ asm "op_padix $padix\n";
}
sub B::PVOP::bytecode {
#
if ($op->name eq "trans") {
my @shorts = unpack("s256", $pv); # assembler handles endianness
- print "op_pv_tr ", join(",", @shorts), "\n";
+ asm "op_pv_tr ", join(",", @shorts), "\n";
} else {
- printf "newpv %s\nop_pv\n", pvstring($pv);
+ asmf "newpv %s\nop_pv\n", pvstring($pv);
}
}
sub B::BINOP::bytecode {
my $op = shift;
- my $lastix = $op->last->objix;
+ my $lastix = $op->last->objix unless $strip_syntree;
$op->B::UNOP::bytecode;
if (($op->type || !$compress_nullops) && !$strip_syntree) {
- print "op_last $lastix\n";
+ asm "op_last $lastix\n";
}
}
sub B::LISTOP::bytecode {
my $op = shift;
- my $children = $op->children;
+ my $children = $op->children unless $strip_syntree;
$op->B::BINOP::bytecode;
if (($op->type || !$compress_nullops) && !$strip_syntree) {
- print "op_children $children\n";
+ asm "op_children $children\n";
}
}
my $nextopix = $op->nextop->objix;
my $lastopix = $op->lastop->objix;
$op->B::LISTOP::bytecode;
- print "op_redoop $redoopix\nop_nextop $nextopix\nop_lastop $lastopix\n";
+ asm "op_redoop $redoopix\nop_nextop $nextopix\nop_lastop $lastopix\n";
}
sub B::COP::bytecode {
my $op = shift;
- my $stashpv = $op->stashpv;
my $file = $op->file;
my $line = $op->line;
+ if ($debug_bc) { # do this early to aid debugging
+ asmf "# line %s:%d\n", $file, $line;
+ }
+ my $stashpv = $op->stashpv;
my $warnings = $op->warnings;
my $warningsix = $warnings->objix;
- if ($debug_bc) {
- printf "# line %s:%d\n", $file, $line;
- }
+ my $labelix = pvix($op->label);
+ my $stashix = pvix($stashpv);
+ my $fileix = pvix($file);
+ $warnings->bytecode;
$op->B::OP::bytecode;
- printf <<"EOT", pvstring($op->label), pvstring($stashpv), $op->cop_seq, pvstring($file), $op->arybase;
-newpv %s
-cop_label
-newpv %s
-cop_stashpv
+ asmf <<"EOT", $labelix, $stashix, $op->cop_seq, $fileix, $op->arybase;
+cop_label %d
+cop_stashpv %d
cop_seq %d
-newpv %s
-cop_file
+cop_file %d
cop_arybase %d
cop_line $line
cop_warnings $warningsix
}
$op->B::LISTOP::bytecode;
if ($opname eq "pushre") {
- printf "op_pmreplrootgv $replrootix\n";
+ asmf "op_pmreplrootgv $replrootix\n";
} else {
- print "op_pmreplroot $replrootix\nop_pmreplstart $replstartix\n";
+ asm "op_pmreplroot $replrootix\nop_pmreplstart $replstartix\n";
}
my $re = pvstring($op->precomp);
# op_pmnext omitted since a perl bug means it's sometime corrupt
- printf <<"EOT", $op->pmflags, $op->pmpermflags;
+ asmf <<"EOT", $op->pmflags, $op->pmpermflags;
op_pmflags 0x%x
op_pmpermflags 0x%x
newpv $re
my $refcnt = $sv->REFCNT;
my $flags = sprintf("0x%x", $sv->FLAGS);
ldsv($ix);
- print "sv_refcnt $refcnt\nsv_flags $flags\n";
+ asm "sv_refcnt $refcnt\nsv_flags $flags\n";
mark_saved($sv);
}
my $sv = shift;
return if saved($sv);
$sv->B::SV::bytecode;
- printf("newpv %s\nxpv\n", pvstring($sv->PV)) if $sv->FLAGS & POK;
+ asmf("newpv %s\nxpv\n", pvstring($sv->PV)) if $sv->FLAGS & POK;
}
sub B::IV::bytecode {
return if saved($sv);
my $iv = $sv->IVX;
$sv->B::SV::bytecode;
- printf "%s $iv\n", $sv->needs64bits ? "xiv64" : "xiv32";
+ asmf "%s $iv\n", $sv->needs64bits ? "xiv64" : "xiv32" if $sv->FLAGS & IOK; # could be PVNV
}
sub B::NV::bytecode {
my $sv = shift;
return if saved($sv);
$sv->B::SV::bytecode;
- printf "xnv %s\n", $sv->NVX;
+ asmf "xnv %s\n", nv($sv->NVX);
}
sub B::RV::bytecode {
my $rvix = $rv->objix;
$rv->bytecode;
$sv->B::SV::bytecode;
- print "xrv $rvix\n";
+ asm "xrv $rvix\n";
}
sub B::PVIV::bytecode {
return if saved($sv);
my $iv = $sv->IVX;
$sv->B::PV::bytecode;
- printf "%s $iv\n", $sv->needs64bits ? "xiv64" : "xiv32";
+ asmf "%s $iv\n", $sv->needs64bits ? "xiv64" : "xiv32";
}
sub B::PVNV::bytecode {
} else {
my $pv = $sv->PV;
$sv->B::IV::bytecode;
- printf "xnv %s\n", $sv->NVX;
+ asmf "xnv %s\n", nv($sv->NVX);
if ($flag == 1) {
$pv .= "\0" . $sv->TABLE;
- printf "newpv %s\npv_cur %d\nxpv\n", pvstring($pv),length($pv)-257;
+ asmf "newpv %s\npv_cur %d\nxpv\n", pvstring($pv),length($pv)-257;
} else {
- printf("newpv %s\nxpv\n", pvstring($pv)) if $sv->FLAGS & POK;
+ asmf("newpv %s\nxpv\n", pvstring($pv)) if $sv->FLAGS & POK;
}
}
}
#
@mgobjix = map($_->OBJ->objix, @mgchain);
$sv->B::PVNV::bytecode($flag);
- print "xmg_stash $stashix\n";
+ asm "xmg_stash $stashix\n";
foreach $mg (@mgchain) {
- printf "sv_magic %s\nmg_obj %d\nnewpv %s\nmg_pv\n",
+ asmf "sv_magic %s\nmg_obj %d\nnewpv %s\nmg_pv\n",
cstring($mg->TYPE), shift(@mgobjix), pvstring($mg->PTR);
}
}
my $sv = shift;
return if saved($sv);
$sv->B::PVMG::bytecode;
- printf <<'EOT', $sv->TARGOFF, $sv->TARGLEN, cstring($sv->TYPE);
+ asmf <<'EOT', $sv->TARGOFF, $sv->TARGLEN, cstring($sv->TYPE);
xlv_targoff %d
xlv_targlen %d
xlv_type %s
return if saved($sv);
# See PVNV::bytecode for an explanation of what the argument does
$sv->B::PVMG::bytecode(1);
- printf "xbm_useful %d\nxbm_previous %d\nxbm_rare %d\n",
+ asmf "xbm_useful %d\nxbm_previous %d\nxbm_rare %d\n",
$sv->USEFUL, $sv->PREVIOUS, $sv->RARE;
}
+sub empty_gv { # is a GV empty except for imported stuff?
+ my $gv = shift;
+
+ return 0 if ($gv->SV->FLAGS & SVTYPEMASK); # sv not SVt_NULL
+ my @subfield_names = qw(AV HV CV FORM IO);
+ @subfield_names = grep {;
+ no strict 'refs';
+ !($gv->GvFLAGS & ${\"GVf_IMPORTED_$_"}->()) && ${$gv->$_()};
+ } @subfield_names;
+ return scalar @subfield_names;
+}
+
sub B::GV::bytecode {
my $gv = shift;
return if saved($gv);
+ return unless grep { $_ eq $gv->STASH->NAME; } @packages;
+ return if $gv->NAME =~ m/^\(/; # ignore overloads - they'll be rebuilt
my $ix = $gv->objix;
mark_saved($gv);
ldsv($ix);
- printf <<"EOT", $gv->FLAGS, $gv->GvFLAGS;
+ asmf <<"EOT", $gv->FLAGS, $gv->GvFLAGS;
sv_flags 0x%x
xgv_flags 0x%x
EOT
my $refcnt = $gv->REFCNT;
- printf("sv_refcnt_add %d\n", $refcnt - 1) if $refcnt > 1;
+ asmf("sv_refcnt_add %d\n", $refcnt - 1) if $refcnt > 1;
return if $gv->is_empty;
- printf <<"EOT", $gv->LINE, pvstring($gv->FILE);
+ asmf <<"EOT", $gv->LINE, pvix($gv->FILE);
gp_line %d
-newpv %s
-gp_file
+gp_file %d
EOT
my $gvname = $gv->NAME;
my $name = cstring($gv->STASH->NAME . "::" . $gvname);
my $egv = $gv->EGV;
my $egvix = $egv->objix;
my $gvrefcnt = $gv->GvREFCNT;
- printf("gp_refcnt_add %d\n", $gvrefcnt - 1) if $gvrefcnt > 1;
+ asmf("gp_refcnt_add %d\n", $gvrefcnt - 1) if $gvrefcnt > 1;
if ($gvrefcnt > 1 && $ix != $egvix) {
- print "gp_share $egvix\n";
+ asm "gp_share $egvix\n";
} else {
if ($gvname !~ /^([^A-Za-z]|STDIN|STDOUT|STDERR|ARGV|SIG|ENV)$/) {
my $i;
my @subfield_names = qw(SV AV HV CV FORM IO);
+ @subfield_names = grep {;
+ no strict 'refs';
+ !($gv->GvFLAGS & ${\"GVf_IMPORTED_$_"}->());
+ } @subfield_names;
my @subfields = map($gv->$_(), @subfield_names);
my @ixes = map($_->objix, @subfields);
# Reset sv register for $gv
ldsv($ix);
for ($i = 0; $i < @ixes; $i++) {
- printf "gp_%s %d\n", lc($subfield_names[$i]), $ixes[$i];
+ asmf "gp_%s %d\n", lc($subfield_names[$i]), $ixes[$i];
}
# Now save all the subfields
my $sv;
}
ldsv($ix);
for ($i = 0; $i < @contents; $i += 2) {
- printf("newpv %s\nhv_store %d\n",
+ asmf("newpv %s\nhv_store %d\n",
pvstring($contents[$i]), $ixes[$i / 2]);
}
- printf "sv_refcnt %d\nsv_flags 0x%x\n", $hv->REFCNT, $hv->FLAGS;
+ asmf "sv_refcnt %d\nsv_flags 0x%x\n", $hv->REFCNT, $hv->FLAGS;
}
}
# create an AV with NEWSV and SvUPGRADE rather than doing newAV
# which is what sets AvMAX and AvFILL.
ldsv($ix);
- printf "xav_flags 0x%x\nxav_max -1\nxav_fill -1\n", $av->AvFLAGS;
+ asmf "sv_flags 0x%x\n", $av->FLAGS & ~SVf_READONLY; # SvREADONLY_off($av) in case PADCONST
+ asmf "xav_flags 0x%x\nxav_max -1\nxav_fill -1\n", $av->AvFLAGS;
if ($fill > -1) {
my $elix;
foreach $elix (@ixes) {
- print "av_push $elix\n";
+ asm "av_push $elix\n";
}
} else {
if ($max > -1) {
- print "av_extend $max\n";
+ asm "av_extend $max\n";
}
}
+ asmf "sv_flags 0x%x\n", $av->FLAGS; # restore flags from above
}
sub B::CV::bytecode {
my $cv = shift;
return if saved($cv);
+ return if ${$cv->GV} && ($cv->GV->GvFLAGS & GVf_IMPORTED_CV);
+ my $fileix = pvix($cv->FILE);
my $ix = $cv->objix;
$cv->B::PVMG::bytecode;
my $i;
# Reset sv register for $cv (since above ->objix calls stomped on it)
ldsv($ix);
for ($i = 0; $i < @ixes; $i++) {
- printf "xcv_%s %d\n", lc($subfield_names[$i]), $ixes[$i];
+ asmf "xcv_%s %d\n", lc($subfield_names[$i]), $ixes[$i];
}
- printf "xcv_depth %d\nxcv_flags 0x%x\n", $cv->DEPTH, $cv->CvFLAGS;
- printf "newpv %s\nxcv_file\n", pvstring($cv->FILE);
+ asmf "xcv_depth %d\nxcv_flags 0x%x\n", $cv->DEPTH, $cv->CvFLAGS;
+ asmf "xcv_file %d\n", $fileix;
# Now save all the subfields (except for CvROOT which was handled
# above) and CvSTART (now the initial element of @subfields).
shift @subfields; # bye-bye CvSTART
$io->B::PVMG::bytecode;
ldsv($ix);
- print "xio_top_gv $top_gvix\n";
- print "xio_fmt_gv $fmt_gvix\n";
- print "xio_bottom_gv $bottom_gvix\n";
+ asm "xio_top_gv $top_gvix\n";
+ asm "xio_fmt_gv $fmt_gvix\n";
+ asm "xio_bottom_gv $bottom_gvix\n";
my $field;
foreach $field (qw(TOP_NAME FMT_NAME BOTTOM_NAME)) {
- printf "newpv %s\nxio_%s\n", pvstring($io->$field()), lc($field);
+ asmf "newpv %s\nxio_%s\n", pvstring($io->$field()), lc($field);
}
foreach $field (qw(LINES PAGE PAGE_LEN LINES_LEFT SUBPROCESS)) {
- printf "xio_%s %d\n", lc($field), $io->$field();
+ asmf "xio_%s %d\n", lc($field), $io->$field();
}
- printf "xio_type %s\nxio_flags 0x%x\n", cstring($io->IoTYPE), $io->IoFLAGS;
+ asmf "xio_type %s\nxio_flags 0x%x\n", cstring($io->IoTYPE), $io->IoFLAGS;
$top_gv->bytecode;
$fmt_gv->bytecode;
$bottom_gv->bytecode;
}
sub bytecompile_object {
- my $sv;
- foreach $sv (@_) {
+ for my $sv (@_) {
svref_2object($sv)->bytecode;
}
}
sub B::GV::bytecodecv {
my $gv = shift;
my $cv = $gv->CV;
- if ($$cv && !saved($cv)) {
+ if ($$cv && !saved($cv) && !($gv->FLAGS & GVf_IMPORTED_CV)) {
if ($debug_cv) {
warn sprintf("saving extra CV &%s::%s (0x%x) from GV 0x%x\n",
$gv->STASH->NAME, $gv->NAME, $$cv, $$gv);
}
}
-sub bytecompile_main {
- my $curpad = (comppadlist->ARRAY)[1];
- my $curpadix = $curpad->objix;
- $curpad->bytecode;
- walkoptree(main_root, "bytecode");
- warn "done main program, now walking symbol table\n" if $debug_bc;
- my ($pack, %exclude);
- foreach $pack (qw(B O AutoLoader DynaLoader XSLoader Config DB VMS strict vars
- FileHandle Exporter Carp UNIVERSAL IO Fcntl Symbol warnings
- attributes File::Spec SelectSaver blib Cwd))
- {
- $exclude{$pack."::"} = 1;
+sub save_call_queues {
+ if (begin_av()->isa("B::AV")) { # this is just to save 'use Foo;' calls
+ for my $cv (begin_av()->ARRAY) {
+ next unless grep { $_ eq $cv->STASH->NAME; } @packages;
+ my $op = $cv->START;
+OPLOOP:
+ while ($$op) {
+ if ($op->name eq 'require') { # save any BEGIN that does a require
+ $cv->bytecode;
+ asmf "push_begin %d\n", $cv->objix;
+ last OPLOOP;
+ }
+ $op = $op->next;
+ }
+ }
}
- no strict qw(vars refs);
- walksymtable(\%{"main::"}, "bytecodecv", sub {
- warn "considering $_[0]\n" if $debug_bc;
- return !defined($exclude{$_[0]});
- });
- if (!$module_only) {
- printf "main_root %d\n", main_root->objix;
- printf "main_start %d\n", main_start->objix;
- printf "curpad $curpadix\n";
- # XXX Do min_intro_pending and max_intro_pending matter?
+ if (init_av()->isa("B::AV")) {
+ for my $cv (init_av()->ARRAY) {
+ next unless grep { $_ eq $cv->STASH->NAME; } @packages;
+ $cv->bytecode;
+ asmf "push_init %d\n", $cv->objix;
+ }
+ }
+ if (end_av()->isa("B::AV")) {
+ for my $cv (end_av()->ARRAY) {
+ next unless grep { $_ eq $cv->STASH->NAME; } @packages;
+ $cv->bytecode;
+ asmf "push_end %d\n", $cv->objix;
+ }
}
}
-sub prepare_assemble {
- my $newfh = IO::File->new_tmpfile;
- select($newfh);
- binmode $newfh;
- return $newfh;
+sub symwalk {
+ no strict 'refs';
+ my $ok = 1 if grep { (my $name = $_[0]) =~ s/::$//; $_ eq $name;} @packages;
+ if (grep { /^$_[0]/; } @packages) {
+ walksymtable(\%{"$_[0]"}, "bytecodecv", \&symwalk, $_[0]);
+ }
+ warn "considering $_[0] ... " . ($ok ? "accepted\n" : "rejected\n")
+ if $debug_bc;
+ $ok;
}
-sub do_assemble {
- my $fh = shift;
- seek($fh, 0, 0); # rewind the temporary file
- assemble_fh($fh, sub { print OUT @_ });
+sub bytecompile_main {
+ my $curpad = (comppadlist->ARRAY)[1];
+ my $curpadix = $curpad->objix;
+ $curpad->bytecode;
+ save_call_queues();
+ walkoptree(main_root, "bytecode") unless ref(main_root) eq "B::NULL";
+ warn "done main program, now walking symbol table\n" if $debug_bc;
+ if (@packages) {
+ no strict qw(refs);
+ walksymtable(\%{"main::"}, "bytecodecv", \&symwalk);
+ } else {
+ die "No packages requested for compilation!\n";
+ }
+ asmf "main_root %d\n", main_root->objix;
+ asmf "main_start %d\n", main_start->objix;
+ asmf "curpad $curpadix\n";
+ # XXX Do min_intro_pending and max_intro_pending matter?
}
sub compile {
my ($option, $opt, $arg);
open(OUT, ">&STDOUT");
binmode OUT;
- select(OUT);
+ select OUT;
OPTION:
while ($option = shift @options) {
if ($option =~ /^-(.)(.*)/) {
}
} elsif ($opt eq "v") {
$verbose = 1;
- } elsif ($opt eq "m") {
- $module_only = 1;
} elsif ($opt eq "S") {
$no_assemble = 1;
} elsif ($opt eq "f") {
foreach $ref (values %optimise) {
$$ref = 0;
}
- if ($arg >= 6) {
- $strip_syntree = 1;
- }
if ($arg >= 2) {
$bypass_nullops = 1;
}
$compress_nullops = 1;
$omit_seq = 1;
}
+ } elsif ($opt eq "u") {
+ $arg ||= shift @options;
+ push @packages, $arg;
+ } else {
+ warn qq(ignoring unknown option "$opt$arg"\n);
}
}
+ if (! @packages) {
+ warn "No package specified for compilation, assuming main::\n";
+ @packages = qw(main);
+ }
if (@options) {
- return sub {
- my $objname;
- my $newfh;
- $newfh = prepare_assemble() unless $no_assemble;
- foreach $objname (@options) {
- eval "bytecompile_object(\\$objname)";
- }
- do_assemble($newfh) unless $no_assemble;
- }
+ die "Extraneous options left on B::Bytecode commandline: @options\n";
} else {
- return sub {
- my $newfh;
- $newfh = prepare_assemble() unless $no_assemble;
+ return sub {
+ newasm(\&apr) unless $no_assemble;
bytecompile_main();
- do_assemble($newfh) unless $no_assemble;
- }
+ endasm() unless $no_assemble;
+ };
}
}
+sub apr { print @_; }
+
1;
__END__
If op->op_next ever points to a NULLOP, replaces the op_next field
with the first non-NULLOP in the path of execution.
-=item B<-fstrip-syntax-tree>
-
-Leaves out code to fill in the pointers which link the internal syntax
-tree together. They're not needed at run-time but leaving them out
-will make it impossible to recompile or disassemble the resulting
-program. It will also stop C<goto label> statements from working.
-
=item B<-On>
Optimisation level (n = 0, 1, 2, ...). B<-O> means B<-O1>.
B<-O1> sets B<-fcompress-nullops> B<-fomit-sequence numbers>.
-B<-O6> adds B<-fstrip-syntax-tree>.
+B<-O2> adds B<-fbypass-nullops>.
=item B<-D>
Output (bytecode) assembler source rather than piping it
through the assembler and outputting bytecode.
-=item B<-m>
-
-Compile as a module rather than a standalone program. Currently this
-just means that the bytecodes for initialising C<main_start>,
-C<main_root> and C<curpad> are omitted.
-
+=item B<-upackage>
+
+Stores package in the output.
+
=back
=head1 EXAMPLES
- perl -MO=Bytecode,-O6,-o,foo.plc foo.pl
+ perl -MO=Bytecode,-O6,-ofoo.plc,-umain foo.pl
- perl -MO=Bytecode,-S foo.pl > foo.S
+ perl -MO=Bytecode,-S,-umain foo.pl > foo.S
assemble foo.S > foo.plc
Note that C<assemble> lives in the C<B> subdirectory of your perl
library directory. The utility called perlcc may also be used to
help make use of this compiler.
- perl -MO=Bytecode,-m,-oFoo.pmc Foo.pm
+ perl -MO=Bytecode,-uFoo,-oFoo.pmc Foo.pm
=head1 BUGS
-Plenty. Current status: experimental.
+Output is still huge and there are still occasional crashes during
+either compilation or ByteLoading. Current status: experimental.
-=head1 AUTHOR
+=head1 AUTHORS
Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>
+Benjamin Stuhl, C<sho_pi@hotmail.com>
=cut
projects / p5sagit/p5-mst-13.2.git / blobdiff