/
CC.pm
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CC.pm
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# CC.pm
#
# Copyright (c) 1996, 1997, 1998 Malcolm Beattie
# Copyright (c) 2009 Reini Urban
#
# You may distribute under the terms of either the GNU General Public
# License or the Artistic License, as specified in the README file.
#
package B::CC;
our $VERSION = '1.00_03';
use Config;
use strict;
#use 5.008;
use B qw(main_start main_root class comppadlist peekop svref_2object
timing_info init_av sv_undef amagic_generation
OPf_WANT_LIST OPf_WANT OPf_MOD OPf_STACKED OPf_SPECIAL
OPpASSIGN_BACKWARDS OPpLVAL_INTRO OPpDEREF_AV OPpDEREF_HV
OPpDEREF OPpFLIP_LINENUM G_ARRAY G_SCALAR
);
use B::C qw(save_unused_subs objsym init_sections mark_unused
output_all output_boilerplate output_main);
use B::Bblock qw(find_leaders);
use B::Stackobj qw(:types :flags);
@B::OP::ISA = qw(B::NULLOP B); # support -Do
@B::LISTOP::ISA = qw(B::BINOP B); # support -Do
# These should probably be elsewhere
# Flags for $op->flags
my $module; # module name (when compiled with -m)
my %done; # hash keyed by $$op of leaders of basic blocks
# which have already been done.
my $leaders; # ref to hash of basic block leaders. Keys are $$op
# addresses, values are the $op objects themselves.
my @bblock_todo; # list of leaders of basic blocks that need visiting
# sometime.
my @cc_todo; # list of tuples defining what PP code needs to be
# saved (e.g. CV, main or PMOP repl code). Each tuple
# is [$name, $root, $start, @padlist]. PMOP repl code
# tuples inherit padlist.
my @stack; # shadows perl's stack when contents are known.
# Values are objects derived from class B::Stackobj
my @pad; # Lexicals in current pad as Stackobj-derived objects
my @padlist; # Copy of current padlist so PMOP repl code can find it
my @cxstack; # Shadows the (compile-time) cxstack for next,last,redo
my $jmpbuf_ix = 0; # Next free index for dynamically allocated jmpbufs
my %constobj; # OP_CONST constants as Stackobj-derived objects
# keyed by $$sv.
my $need_freetmps = 0; # We may postpone FREETMPS to the end of each basic
# block or even to the end of each loop of blocks,
# depending on optimisation options.
my $know_op = 0; # Set when C variable op already holds the right op
# (from an immediately preceding DOOP(ppname)).
my $errors = 0; # Number of errors encountered
my %skip_stack; # Hash of PP names which don't need write_back_stack
my %skip_lexicals; # Hash of PP names which don't need write_back_lexicals
my %skip_invalidate; # Hash of PP names which don't need invalidate_lexicals
my %ignore_op; # Hash of ops which do nothing except returning op_next
my %need_curcop; # Hash of ops which need PL_curcop
my %lexstate; #state of padsvs at the start of a bblock
my $verbose = 1;
BEGIN {
foreach (qw(pp_scalar pp_regcmaybe pp_lineseq pp_scope pp_null)) {
$ignore_op{$_} = 1;
}
}
my ( $module_name, %debug );
# 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 ( $freetmps_each_bblock, $freetmps_each_loop, $omit_taint );
my %optimise = (
freetmps_each_bblock => \$freetmps_each_bblock,
freetmps_each_loop => \$freetmps_each_loop,
omit_taint => \$omit_taint
);
# perl patchlevel to generate code for (defaults to current patchlevel)
my $patchlevel = int( 0.5 + 1000 * ( $] - 5 ) ); # unused?
my $ITHREADS = $Config{useithreads};
my $PERL510 = ( $] >= 5.009005 );
my $PERL511 = ( $] >= 5.010 );
if ($PERL511) {
sub CXt_NULL { 0 }
sub CXt_SUB { 8 }
sub CXt_EVAL { 10 }
sub CXt_SUBST { 11 }
sub CXt_BLOCK { 2 }
sub CXt_LOOP_FOR { 4 }
sub CXt_LOOP_PLAIN { 5 }
sub CXt_LOOP_LAZYSV { 6 }
sub CXt_LOOP_LAZYIV { 7 }
sub CxTYPE_no_LOOP { ( $_[0]->{type} < 4 or $_[0]->{type} > 7 ) }
}
else {
sub CXt_NULL { 0 }
sub CXt_SUB { 1 }
sub CXt_EVAL { 2 }
sub CXt_LOOP { 3 }
sub CXt_SUBST { 4 }
sub CXt_BLOCK { 5 }
sub CxTYPE_no_LOOP { $_[0]->{type} != 3 }
}
# Could rewrite push_runtime() and output_runtime() to use a
# temporary file if memory is at a premium.
my $ppname; # name of current fake PP function
my $runtime_list_ref;
my $declare_ref; # Hash ref keyed by C variable type of declarations.
my @pp_list; # list of [$ppname, $runtime_list_ref, $declare_ref]
# tuples to be written out.
my ( $init, $decl );
sub init_hash {
map { $_ => 1 } @_;
}
#
# Initialise the hashes for the default PP functions where we can avoid
# either write_back_stack, write_back_lexicals or invalidate_lexicals.
#
%skip_lexicals = init_hash qw(pp_enter pp_enterloop);
%skip_invalidate = init_hash qw(pp_enter pp_enterloop);
%need_curcop = init_hash qw(pp_rv2gv pp_bless pp_repeat pp_sort pp_caller
pp_reset pp_rv2cv pp_entereval pp_require pp_dofile
pp_entertry pp_enterloop pp_enteriter pp_entersub
pp_enter pp_method);
sub debug {
if ( $debug{runtime} ) {
warn(@_);
}
else {
my @tmp = @_;
runtime( map { chomp; "/* $_ */" } @tmp );
}
}
sub declare {
my ( $type, $var ) = @_;
push( @{ $declare_ref->{$type} }, $var );
}
sub push_runtime {
push( @$runtime_list_ref, @_ );
warn join( "\n", @_ ) . "\n" if $debug{runtime};
}
sub save_runtime {
push( @pp_list, [ $ppname, $runtime_list_ref, $declare_ref ] );
}
sub output_runtime {
my $ppdata;
print qq(#include "cc_runtime.h"\n);
if ($ITHREADS) {
# Threads error Bug#55302: too few arguments to function
# CALLRUNOPS()=>CALLRUNOPS(aTHX)
print '
#undef PP_EVAL
#define PP_EVAL(ppaddr, nxt) do { \
dJMPENV; \
int ret; \
PUTBACK; \
JMPENV_PUSH(ret); \
switch (ret) { \
case 0: \
PL_op = ppaddr(aTHX); \
';
print 'PL_retstack[PL_retstack_ix - 1] = Nullop; \
' if $] < 5.009005;
print ' if (PL_op != nxt) CALLRUNOPS(aTHX); \
JMPENV_POP; \
break; \
case 1: JMPENV_POP; JMPENV_JUMP(1); \
case 2: JMPENV_POP; JMPENV_JUMP(2); \
case 3: \
JMPENV_POP; \
if (PL_restartop != nxt) \
JMPENV_JUMP(3); \
} \
PL_op = nxt; \
SPAGAIN; \
} while (0)
';
}
foreach $ppdata (@pp_list) {
my ( $name, $runtime, $declare ) = @$ppdata;
print "\nstatic\nCCPP($name)\n{\n";
my ( $type, $varlist, $line );
while ( ( $type, $varlist ) = each %$declare ) {
print "\t$type ", join( ", ", @$varlist ), ";\n";
}
foreach $line (@$runtime) {
print $line, "\n";
}
print "}\n";
}
}
sub runtime {
my $line;
foreach $line (@_) {
push_runtime("\t$line");
}
}
sub init_pp {
$ppname = shift;
$runtime_list_ref = [];
$declare_ref = {};
runtime("dSP;");
declare( "I32", "oldsave" );
declare( "SV", "**svp" );
map { declare( "SV", "*$_" ) } qw(sv src dst left right);
declare( "MAGIC", "*mg" );
$decl->add("static OP * $ppname (pTHX);");
debug "init_pp: $ppname\n" if $debug{queue};
}
# Initialise runtime_callback function for Stackobj class
BEGIN { B::Stackobj::set_callback( \&runtime ) }
# Initialise saveoptree_callback for B::C class
sub cc_queue {
my ( $name, $root, $start, @pl ) = @_;
debug "cc_queue: name $name, root $root, start $start, padlist (@pl)\n"
if $debug{queue};
if ( $name eq "*ignore*" ) {
$name = 0;
}
else {
push( @cc_todo, [ $name, $root, $start, ( @pl ? @pl : @padlist ) ] );
}
my $fakeop = new B::FAKEOP( "next" => 0, sibling => 0, ppaddr => $name );
$start = $fakeop->save;
debug "cc_queue: name $name returns $start\n" if $debug{queue};
return $start;
}
BEGIN { B::C::set_callback( \&cc_queue ) }
sub valid_int { $_[0]->{flags} & VALID_INT }
sub valid_double { $_[0]->{flags} & VALID_DOUBLE }
sub valid_numeric { $_[0]->{flags} & ( VALID_INT | VALID_DOUBLE ) }
sub valid_sv { $_[0]->{flags} & VALID_SV }
sub top_int { @stack ? $stack[-1]->as_int : "TOPi" }
sub top_double { @stack ? $stack[-1]->as_double : "TOPn" }
sub top_numeric { @stack ? $stack[-1]->as_numeric : "TOPn" }
sub top_sv { @stack ? $stack[-1]->as_sv : "TOPs" }
sub top_bool { @stack ? $stack[-1]->as_bool : "SvTRUE(TOPs)" }
sub pop_int { @stack ? ( pop @stack )->as_int : "POPi" }
sub pop_double { @stack ? ( pop @stack )->as_double : "POPn" }
sub pop_numeric { @stack ? ( pop @stack )->as_numeric : "POPn" }
sub pop_sv { @stack ? ( pop @stack )->as_sv : "POPs" }
sub pop_bool {
if (@stack) {
return ( ( pop @stack )->as_bool );
}
else {
# Careful: POPs has an auto-decrement and SvTRUE evaluates
# its argument more than once.
runtime("sv = POPs;");
return "SvTRUE(sv)";
}
}
sub write_back_lexicals {
my $avoid = shift || 0;
debug "write_back_lexicals($avoid) called from @{[(caller(1))[3]]}\n"
if $debug{shadow};
my $lex;
foreach $lex (@pad) {
next unless ref($lex);
$lex->write_back unless $lex->{flags} & $avoid;
}
}
sub save_or_restore_lexical_state {
my $bblock = shift;
unless ( exists $lexstate{$bblock} ) {
foreach my $lex (@pad) {
next unless ref($lex);
${ $lexstate{$bblock} }{ $lex->{iv} } = $lex->{flags};
}
}
else {
foreach my $lex (@pad) {
next unless ref($lex);
my $old_flags = ${ $lexstate{$bblock} }{ $lex->{iv} };
next if ( $old_flags eq $lex->{flags} );
if ( ( $old_flags & VALID_SV ) && !( $lex->{flags} & VALID_SV ) ) {
$lex->write_back;
}
if ( ( $old_flags & VALID_DOUBLE ) && !( $lex->{flags} & VALID_DOUBLE ) )
{
$lex->load_double;
}
if ( ( $old_flags & VALID_INT ) && !( $lex->{flags} & VALID_INT ) ) {
$lex->load_int;
}
}
}
}
sub write_back_stack {
my $obj;
return unless @stack;
runtime( sprintf( "EXTEND(sp, %d);", scalar(@stack) ) );
foreach $obj (@stack) {
runtime( sprintf( "PUSHs((SV*)%s);", $obj->as_sv ) );
}
@stack = ();
}
sub invalidate_lexicals {
my $avoid = shift || 0;
debug "invalidate_lexicals($avoid) called from @{[(caller(1))[3]]}\n"
if $debug{shadow};
my $lex;
foreach $lex (@pad) {
next unless ref($lex);
$lex->invalidate unless $lex->{flags} & $avoid;
}
}
sub reload_lexicals {
my $lex;
foreach $lex (@pad) {
next unless ref($lex);
my $type = $lex->{type};
if ( $type == T_INT ) {
$lex->as_int;
}
elsif ( $type == T_DOUBLE ) {
$lex->as_double;
}
else {
$lex->as_sv;
}
}
}
{
package B::Pseudoreg;
#
# This class allocates pseudo-registers (OK, so they're C variables).
#
my %alloc; # Keyed by variable name. A value of 1 means the
# variable has been declared. A value of 2 means
# it's in use.
sub new_scope { %alloc = () }
sub new ($$$) {
my ( $class, $type, $prefix ) = @_;
my ( $ptr, $i, $varname, $status, $obj );
$prefix =~ s/^(\**)//;
$ptr = $1;
$i = 0;
do {
$varname = "$prefix$i";
$status = $alloc{$varname};
} while $status == 2;
if ( $status != 1 ) {
# Not declared yet
B::CC::declare( $type, "$ptr$varname" );
$alloc{$varname} = 2; # declared and in use
}
$obj = bless \$varname, $class;
return $obj;
}
sub DESTROY {
my $obj = shift;
$alloc{$$obj} = 1; # no longer in use but still declared
}
}
{
package B::Shadow;
#
# This class gives a standard API for a perl object to shadow a
# C variable and only generate reloads/write-backs when necessary.
#
# Use $obj->load($foo) instead of runtime("shadowed_c_var = foo").
# Use $obj->write_back whenever shadowed_c_var needs to be up to date.
# Use $obj->invalidate whenever an unknown function may have
# set shadow itself.
sub new {
my ( $class, $write_back ) = @_;
# Object fields are perl shadow variable, validity flag
# (for *C* variable) and callback sub for write_back
# (passed perl shadow variable as argument).
bless [ undef, 1, $write_back ], $class;
}
sub load {
my ( $obj, $newval ) = @_;
$obj->[1] = 0; # C variable no longer valid
$obj->[0] = $newval;
}
sub write_back {
my $obj = shift;
if ( !( $obj->[1] ) ) {
$obj->[1] = 1; # C variable will now be valid
&{ $obj->[2] }( $obj->[0] );
}
}
sub invalidate { $_[0]->[1] = 0 } # force C variable to be invalid
}
my $curcop = new B::Shadow(
sub {
my $opsym = shift->save;
runtime("PL_curcop = (COP*)$opsym;");
}
);
#
# Context stack shadowing. Mimics stuff in pp_ctl.c, cop.h and so on.
#
sub dopoptoloop {
my $cxix = $#cxstack;
while ( $cxix >= 0 && CxTYPE_no_LOOP( $cxstack[$cxix] ) ) {
$cxix--;
}
debug "dopoptoloop: returning $cxix" if $debug{cxstack};
return $cxix;
}
sub dopoptolabel {
my $label = shift;
my $cxix = $#cxstack;
while (
$cxix >= 0
&& ( CxTYPE_no_LOOP( $cxstack[$cxix] )
|| $cxstack[$cxix]->{label} ne $label )
)
{
$cxix--;
}
debug "dopoptolabel: returning $cxix" if $debug{cxstack};
return $cxix;
}
sub error {
my $format = shift;
my $file = $curcop->[0]->file;
my $line = $curcop->[0]->line;
$errors++;
if (@_) {
warn sprintf( "%s:%d: $format\n", $file, $line, @_ );
}
else {
warn sprintf( "%s:%d: %s\n", $file, $line, $format );
}
}
#
# Load pad takes (the elements of) a PADLIST as arguments and loads
# up @pad with Stackobj-derived objects which represent those lexicals.
# If/when perl itself can generate type information (my int $foo) then
# we'll take advantage of that here. Until then, we'll use various hacks
# to tell the compiler when we want a lexical to be a particular type
# or to be a register.
#
sub load_pad {
my ( $namelistav, $valuelistav ) = @_;
@padlist = @_;
my @namelist = $namelistav->ARRAY;
my @valuelist = $valuelistav->ARRAY;
my $ix;
@pad = ();
debug "load_pad: $#namelist names, $#valuelist values\n" if $debug{pad};
# Temporary lexicals don't get named so it's possible for @valuelist
# to be strictly longer than @namelist. We count $ix up to the end of
# @valuelist but index into @namelist for the name. Any temporaries which
# run off the end of @namelist will make $namesv undefined and we treat
# that the same as having an explicit SPECIAL sv_undef object in @namelist.
# [XXX If/when @_ becomes a lexical, we must start at 0 here.]
for ( $ix = 1 ; $ix < @valuelist ; $ix++ ) {
my $namesv = $namelist[$ix];
my $type = T_UNKNOWN;
my $flags = 0;
my $name = "tmp$ix";
my $class = class($namesv);
if ( !defined($namesv) || $class eq "SPECIAL" ) {
# temporaries have &PL_sv_undef instead of a PVNV for a name
$flags = VALID_SV | TEMPORARY | REGISTER;
}
else {
if ( $namesv->PV =~ /^\$(.*)_([di])(r?)$/ ) {
$name = $1;
if ( $2 eq "i" ) {
$type = T_INT;
$flags = VALID_SV | VALID_INT;
}
elsif ( $2 eq "d" ) {
$type = T_DOUBLE;
$flags = VALID_SV | VALID_DOUBLE;
}
$flags |= REGISTER if $3;
}
}
$pad[$ix] =
new B::Stackobj::Padsv( $type, $flags, $ix, "i_$name", "d_$name" );
debug sprintf( "PL_curpad[$ix] = %s\n", $pad[$ix]->peek ) if $debug{pad};
}
}
sub declare_pad {
my $ix;
for ( $ix = 1 ; $ix <= $#pad ; $ix++ ) {
my $type = $pad[$ix]->{type};
declare( "IV",
$type == T_INT ? sprintf( "%s=0", $pad[$ix]->{iv} ) : $pad[$ix]->{iv} )
if $pad[$ix]->save_int;
declare( "double",
$type == T_DOUBLE
? sprintf( "%s = 0", $pad[$ix]->{nv} )
: $pad[$ix]->{nv} )
if $pad[$ix]->save_double;
}
}
#
# Debugging stuff
#
sub peek_stack {
sprintf "stack = %s\n", join( " ", map( $_->minipeek, @stack ) );
}
#
# OP stuff
#
sub label {
my $op = shift;
# Preserve original label name for "real" labels
if ($op->can("label") and $op->label) {
return sprintf( "label_%s_%x", $op->label, $$op );
} else {
return sprintf( "lab_%x", $$op );
}
}
sub write_label {
my $op = shift;
push_runtime( sprintf( " %s:", label($op) ) );
}
sub loadop {
my $op = shift;
my $opsym = $op->save;
runtime("PL_op = $opsym;") unless $know_op;
return $opsym;
}
sub doop {
my $op = shift;
my $ppname = $op->ppaddr;
my $sym = loadop($op);
runtime("DOOP($ppname);");
$know_op = 1;
return $sym;
}
sub gimme {
my $op = shift;
my $flags = $op->flags;
return ( ( $flags & OPf_WANT )
? ( ( $flags & OPf_WANT ) == OPf_WANT_LIST ? G_ARRAY : G_SCALAR )
: "dowantarray()" );
}
#
# Code generation for PP code
#
sub pp_null {
my $op = shift;
return $op->next;
}
sub pp_stub {
my $op = shift;
my $gimme = gimme($op);
if ( $gimme != G_ARRAY ) {
my $obj = new B::Stackobj::Const(sv_undef);
push( @stack, $obj );
# XXX Change to push a constant sv_undef Stackobj onto @stack
#write_back_stack();
#runtime("if ($gimme != G_ARRAY) XPUSHs(&PL_sv_undef);");
}
return $op->next;
}
sub pp_unstack {
my $op = shift;
@stack = ();
runtime("PP_UNSTACK;");
return $op->next;
}
sub pp_and {
my $op = shift;
my $next = $op->next;
reload_lexicals();
unshift( @bblock_todo, $next );
if ( @stack >= 1 ) {
my $bool = pop_bool();
write_back_stack();
save_or_restore_lexical_state($$next);
runtime(
sprintf( "if (!$bool) {XPUSHs(&PL_sv_no); goto %s;}", label($next) ) );
}
else {
save_or_restore_lexical_state($$next);
runtime( sprintf( "if (!%s) goto %s;", top_bool(), label($next) ),
"*sp--;" );
}
return $op->other;
}
sub pp_or {
my $op = shift;
my $next = $op->next;
reload_lexicals();
unshift( @bblock_todo, $next );
if ( @stack >= 1 ) {
my $bool = pop_bool @stack;
write_back_stack();
save_or_restore_lexical_state($$next);
runtime(
sprintf(
"if (%s) { XPUSHs(&PL_sv_yes); goto %s; }", $bool, label($next)
)
);
}
else {
save_or_restore_lexical_state($$next);
runtime( sprintf( "if (%s) goto %s;", top_bool(), label($next) ),
"*sp--;" );
}
return $op->other;
}
sub pp_cond_expr {
my $op = shift;
my $false = $op->next;
unshift( @bblock_todo, $false );
reload_lexicals();
my $bool = pop_bool();
write_back_stack();
save_or_restore_lexical_state($$false);
runtime( sprintf( "if (!$bool) goto %s;", label($false) ) );
return $op->other;
}
sub pp_padsv {
my $op = shift;
my $ix = $op->targ;
push( @stack, $pad[$ix] );
if ( $op->flags & OPf_MOD ) {
my $private = $op->private;
if ( $private & OPpLVAL_INTRO ) {
runtime("SAVECLEARSV(PL_curpad[$ix]);");
}
elsif ( ( $private & OPpDEREF ) and $] < 5.008 ) {
# FIXME!
runtime(
sprintf( "vivify_ref(PL_curpad[%d], %d);", $ix, $private & OPpDEREF ) );
$pad[$ix]->invalidate;
}
}
return $op->next;
}
sub pp_const {
my $op = shift;
my $sv = $op->sv;
my $obj;
# constant could be in the pad (under useithreads)
if ($$sv) {
$obj = $constobj{$$sv};
if ( !defined($obj) ) {
$obj = $constobj{$$sv} = new B::Stackobj::Const($sv);
}
}
else {
$obj = $pad[ $op->targ ];
}
push( @stack, $obj );
return $op->next;
}
sub pp_nextstate {
my $op = shift;
$curcop->load($op);
@stack = ();
debug( sprintf( "%s:%d\n", $op->file, $op->line ) ) if $debug{lineno};
debug( sprintf( "CopLABEL %s\n", $op->label ) ) if $op->label and $debug{cxstack};
runtime("TAINT_NOT;") unless $omit_taint;
runtime("sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;");
if ( $freetmps_each_bblock || $freetmps_each_loop ) {
$need_freetmps = 1;
}
else {
runtime("FREETMPS;");
}
return $op->next;
}
sub pp_dbstate {
my $op = shift;
$curcop->invalidate; # XXX?
return default_pp($op);
}
#default_pp will handle this:
#sub pp_bless { $curcop->write_back; default_pp(@_) }
#sub pp_repeat { $curcop->write_back; default_pp(@_) }
# The following subs need $curcop->write_back if we decide to support arybase:
# pp_pos, pp_substr, pp_index, pp_rindex, pp_aslice, pp_lslice, pp_splice
#sub pp_caller { $curcop->write_back; default_pp(@_) }
#sub pp_reset { $curcop->write_back; default_pp(@_) }
sub pp_rv2gv {
my $op = shift;
$curcop->write_back;
write_back_lexicals() unless $skip_lexicals{$ppname};
write_back_stack() unless $skip_stack{$ppname};
my $sym = doop($op);
if ( $op->private & OPpDEREF ) {
$init->add( sprintf("((UNOP *)$sym)->op_first = $sym;") );
$init->add( sprintf( "((UNOP *)$sym)->op_type = %d;", $op->first->type ) );
}
return $op->next;
}
sub pp_sort {
my $op = shift;
my $ppname = $op->ppaddr;
if ( $op->flags & OPf_SPECIAL && $op->flags & OPf_STACKED ) {
# This indicates the sort BLOCK Array case
# Ugly surgery required. sort expects as block: pushmark rv2gv leave => enter
# pp_sort() OP *kid = cLISTOP->op_first->op_sibling;/* skip over pushmark 4 to null */
# kid = cUNOPx(kid)->op_first; /* pass rv2gv (null'ed) */
# kid = cUNOPx(kid)->op_first; /* pass leave */
#
#3 <0> pushmark s ->4
#8 <@> sort lKS* ->9
#4 <0> pushmark s ->5
#- <1> null sK/1 ->5
#- <1> ex-leave sKP ->-
#- <0> enter s ->-
# some code doing cmp or ncmp
# Example with 3 const args: print sort { bla; $b <=> $a } 1,4,3
#5 <$> const[IV 1] s ->6
#6 <$> const[IV 4] s ->7
#7 <$> const[IV 3] s ->8 => sort
#
my $root = $op->first->sibling->first; #leave or null
my $start = $root->first; #enter
warn "sort BLOCK Array: root=",$root->name,", start=",$start->name,"\n" if $debug{op};
my $pushmark = $op->first->save; #pushmark sibling to null
$op->first->sibling->save; #null->first to leave
$root->save; #ex-leave
my $sym = $start->save; #enter
my $fakeop = cc_queue( "pp_sort" . $$op, $root, $start );
$init->add( sprintf( "(%s)->op_next = %s;", $sym, $fakeop ) );
}
$curcop->write_back;
write_back_lexicals();
write_back_stack();
doop($op);
return $op->next;
}
sub pp_gv {
my $op = shift;
my $gvsym;
if ($ITHREADS) {
$gvsym = $pad[ $op->padix ]->as_sv;
}
else {
$gvsym = $op->gv->save;
}
write_back_stack();
runtime("XPUSHs((SV*)$gvsym);");
return $op->next;
}
sub pp_gvsv {
my $op = shift;
my $gvsym;
if ($ITHREADS) {
#debug(sprintf("OP name=%s, class=%s",$op->name,class($op))) if $debug{pad};
debug( sprintf( "GVSV->padix = %d", $op->padix ) ) if $debug{pad};
$gvsym = $pad[ $op->padix ]->as_sv;
debug( sprintf( "GVSV->private = 0x%x", $op->private ) ) if $debug{pad};
}
else {
$gvsym = $op->gv->save;
}
write_back_stack();
if ( $op->private & OPpLVAL_INTRO ) {
runtime("XPUSHs(save_scalar($gvsym));");
}
else {
$PERL510
? runtime("XPUSHs(GvSVn($gvsym));")
: runtime("XPUSHs(GvSV($gvsym));");
}
return $op->next;
}
sub pp_aelemfast {
my $op = shift;
my $gvsym;
if ($ITHREADS) {
$gvsym = $pad[ $op->padix ]->as_sv;
}
else {
$gvsym = $op->gv->save;
}
my $ix = $op->private;
my $flag = $op->flags & OPf_MOD;
write_back_stack();
runtime(
"svp = av_fetch(GvAV($gvsym), $ix, $flag);",
"PUSHs(svp ? *svp : &PL_sv_undef);"
);
return $op->next;
}
sub int_binop {
my ( $op, $operator ) = @_;
if ( $op->flags & OPf_STACKED ) {
my $right = pop_int();
if ( @stack >= 1 ) {
my $left = top_int();
$stack[-1]->set_int( &$operator( $left, $right ) );
}
else {
runtime( sprintf( "sv_setiv(TOPs, %s);", &$operator( "TOPi", $right ) ) );
}
}
else {
my $targ = $pad[ $op->targ ];
my $right = new B::Pseudoreg( "IV", "riv" );
my $left = new B::Pseudoreg( "IV", "liv" );
runtime( sprintf( "$$right = %s; $$left = %s;", pop_int(), pop_int ) );
$targ->set_int( &$operator( $$left, $$right ) );
push( @stack, $targ );
}
return $op->next;
}
sub INTS_CLOSED () { 0x1 }
sub INT_RESULT () { 0x2 }
sub NUMERIC_RESULT () { 0x4 }
sub numeric_binop {
my ( $op, $operator, $flags ) = @_;
my $force_int = 0;
$force_int ||= ( $flags & INT_RESULT );
$force_int ||=
( $flags & INTS_CLOSED
&& @stack >= 2
&& valid_int( $stack[-2] )
&& valid_int( $stack[-1] ) );
if ( $op->flags & OPf_STACKED ) {
my $right = pop_numeric();
if ( @stack >= 1 ) {
my $left = top_numeric();
if ($force_int) {
$stack[-1]->set_int( &$operator( $left, $right ) );
}
else {
$stack[-1]->set_numeric( &$operator( $left, $right ) );
}
}
else {
if ($force_int) {
my $rightruntime = new B::Pseudoreg( "IV", "riv" );
runtime( sprintf( "$$rightruntime = %s;", $right ) );
runtime(
sprintf(
"sv_setiv(TOPs, %s);", &$operator( "TOPi", $$rightruntime )
)
);
}
else {
my $rightruntime = new B::Pseudoreg( "double", "rnv" );
runtime( sprintf( "$$rightruntime = %s;", $right ) );
runtime(
sprintf(
"sv_setnv(TOPs, %s);", &$operator( "TOPn", $$rightruntime )
)
);
}
}
}
else {
my $targ = $pad[ $op->targ ];
$force_int ||= ( $targ->{type} == T_INT );
if ($force_int) {
my $right = new B::Pseudoreg( "IV", "riv" );
my $left = new B::Pseudoreg( "IV", "liv" );
runtime(
sprintf( "$$right = %s; $$left = %s;", pop_numeric(), pop_numeric ) );
$targ->set_int( &$operator( $$left, $$right ) );
}
else {
my $right = new B::Pseudoreg( "double", "rnv" );
my $left = new B::Pseudoreg( "double", "lnv" );
runtime(
sprintf( "$$right = %s; $$left = %s;", pop_numeric(), pop_numeric ) );
$targ->set_numeric( &$operator( $$left, $$right ) );
}
push( @stack, $targ );
}
return $op->next;
}
sub pp_ncmp {
my ($op) = @_;
if ( $op->flags & OPf_STACKED ) {
my $right = pop_numeric();
if ( @stack >= 1 ) {
my $left = top_numeric();
runtime sprintf( "if (%s > %s){", $left, $right );
$stack[-1]->set_int(1);
$stack[-1]->write_back();
runtime sprintf( "}else if (%s < %s ) {", $left, $right );
$stack[-1]->set_int(-1);
$stack[-1]->write_back();
runtime sprintf( "}else if (%s == %s) {", $left, $right );
$stack[-1]->set_int(0);
$stack[-1]->write_back();
runtime sprintf("}else {");
$stack[-1]->set_sv("&PL_sv_undef");
runtime "}";
}
else {
my $rightruntime = new B::Pseudoreg( "double", "rnv" );
runtime( sprintf( "$$rightruntime = %s;", $right ) );
runtime sprintf( qq/if ("TOPn" > %s){/, $rightruntime );
runtime sprintf("sv_setiv(TOPs,1);");
runtime sprintf( qq/}else if ( "TOPn" < %s ) {/, $$rightruntime );
runtime sprintf("sv_setiv(TOPs,-1);");
runtime sprintf( qq/} else if ("TOPn" == %s) {/, $$rightruntime );
runtime sprintf("sv_setiv(TOPs,0);");
runtime sprintf(qq/}else {/);
runtime sprintf("sv_setiv(TOPs,&PL_sv_undef;");
runtime "}";
}
}
else {
my $targ = $pad[ $op->targ ];
my $right = new B::Pseudoreg( "double", "rnv" );
my $left = new B::Pseudoreg( "double", "lnv" );
runtime(
sprintf( "$$right = %s; $$left = %s;", pop_numeric(), pop_numeric ) );
runtime sprintf( "if (%s > %s){ /*targ*/", $$left, $$right );
$targ->set_int(1);
$targ->write_back();
runtime sprintf( "}else if (%s < %s ) {", $$left, $$right );
$targ->set_int(-1);
$targ->write_back();
runtime sprintf( "}else if (%s == %s) {", $$left, $$right );
$targ->set_int(0);