/
QASTRegexCompilerMAST.nqp
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QASTRegexCompilerMAST.nqp
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use QASTNode;
use NQPHLL;
use MASTNodes;
use MASTOps;
use QRegex;
my $MVM_reg_void := 0; # not really a register; just a result/return kind marker
my $MVM_reg_int8 := 1;
my $MVM_reg_int16 := 2;
my $MVM_reg_int32 := 3;
my $MVM_reg_int64 := 4;
my $MVM_reg_num32 := 5;
my $MVM_reg_num64 := 6;
my $MVM_reg_str := 7;
my $MVM_reg_obj := 8;
class QAST::MASTRegexCompiler {
method new() {
my $obj := nqp::create(self);
$obj.BUILD();
$obj
}
method BUILD() {
}
method unique($str?) {
$*QASTCOMPILER.unique($str)
}
method as_mast($node, :$want) {
# Prefix for the regexes code pieces.
my $prefix := $*QASTCOMPILER.unique('rx') ~ '_';
my $*RXPREFIX := $prefix;
# Build the list of (unique) registers we need
my $tgt := fresh_s();
my $pos := fresh_i();
my $off := fresh_i();
my $eos := fresh_i();
my $rep := fresh_i();
my $cur := fresh_o();
my $curclass := fresh_o();
my $bstack := fresh_o();
my $cstack := fresh_o();
my $negone := fresh_i();
my $zero := fresh_i();
my $one := fresh_i();
my $two := fresh_i();
my $three := fresh_i();
my $four := fresh_i();
my $P11 := fresh_o();
my $method := fresh_o();
my $tmp := fresh_o();
# cclass_const
my $cclass_word := fresh_i();
my $cclass_newline := fresh_i();
# create our labels
my $startlabel := label($prefix ~ 'start');
my $donelabel := label($prefix ~ 'done');
my $restartlabel := label($prefix ~ 'restart');
my $faillabel := label($prefix ~ 'fail');
my $jumplabel := label($prefix ~ 'jump');
my $cutlabel := label($prefix ~ 'cut');
my $cstacklabel := label($prefix ~ 'cstack_done');
my $self := $*BLOCK.local('self');
my %*REG := nqp::hash(
'tgt', $tgt,
'pos', $pos,
'off', $off,
'eos', $eos,
'rep', $rep,
'cur', $cur,
'curclass', $curclass,
'bstack', $bstack,
'cstack', $cstack,
'negone', $negone,
'zero', $zero,
'one', $one,
'two', $two,
'three', $three,
'four', $four,
'P11', $P11,
'fail', $faillabel,
'jump', $jumplabel,
'method', $method,
'self', $self,
'cclass_word' , $cclass_word,
'cclass_newline', $cclass_newline
);
my @*RXJUMPS := nqp::list($donelabel);
my $shared := fresh_o();
my $sharedclass := fresh_o();
my $i19 := fresh_i(); # yes, I know, inheriting the name from ancestor method
my $i0 := fresh_i();
my @ins := [
op('const_i64', $negone, ival(-1)),
op('const_i64', $zero, ival(0)),
op('const_i64', $one, ival(1)),
op('const_i64', $two, ival(2)),
op('const_i64', $three, ival(3)),
op('const_i64', $four, ival(4)),
op('const_i64', $cclass_word, ival(nqp::const::CCLASS_WORD)),
op('const_i64', $cclass_newline, ival(nqp::const::CCLASS_NEWLINE)),
op('findmeth', $method, $self, sval('!cursor_start')),
call($method, [ $Arg::obj ], :result($cur), $self )
];
my int $has_cursor_type := $node.has_cursor_type();
my $*cursor_type;
if $has_cursor_type {
$*cursor_type := $node.cursor_type();
my $wval := $*QASTCOMPILER.as_mast(QAST::WVal.new( :value($*cursor_type) ));
merge_ins(@ins, $wval.instructions);
merge_ins(@ins, [
op('set', $curclass, $wval.result_reg),
op('getattr_o', $shared, $self, $curclass, sval('$!shared'),
ival(nqp::hintfor($*cursor_type, '$!shared')))
]);
release($wval.result_reg, $MVM_reg_obj);
}
else {
merge_ins(@ins, [
op('findmeth', $shared, $self, sval('!shared')),
call($shared, [ $Arg::obj ], :result($shared), $self ),
op('getwhat', $sharedclass, $shared),
op('getattr_o', $curclass, $shared, $sharedclass, sval('$!CUR_CLASS'), ival(-1))
]);
}
merge_ins(@ins, [
op('getattr_s', $tgt, $shared, $sharedclass, sval('$!target'),
ival(nqp::hintfor(ParseShared, '$!target'))),
op('flattenropes', $tgt),
op('getattr_i', $pos, $cur, $curclass, sval('$!from'),
ival(nqp::hintfor($*cursor_type, '$!from'))),
op('getattr_o', $bstack, $cur, $curclass, sval('$!bstack'),
ival(nqp::hintfor($*cursor_type, '$!bstack'))),
op('getattr_o', $tmp, $self, $curclass, sval('$!restart'),
ival(nqp::hintfor($*cursor_type, '$!restart'))),
op('isconcrete', $i19, $tmp),
op('bindlex', $*BLOCK.resolve_lexical('$¢'), $cur),
op('graphs_s', $eos, $tgt),
op('eq_i', $i0, $one, $i19),
op('if_i', $i0, $restartlabel),
op('gt_i', $i0, $pos, $eos),
op('if_i', $i0, $faillabel)
]);
release($i0, $MVM_reg_int64);
release($i19, $MVM_reg_int64);
merge_ins(@ins, self.regex_mast($node));
$i0 := fresh_i();
$i19 := fresh_i();
my $i18 := fresh_i();
merge_ins(@ins, [
$restartlabel,
op('getattr_o', $cstack, $cur, $curclass, sval('$!cstack'),
ival(nqp::hintfor($*cursor_type, '$!cstack'))),
$faillabel,
op('isnull', $i0, $bstack),
op('if_i', $i0, $donelabel),
op('elems', $i0, $bstack),
op('gt_i', $i0, $i0, $zero),
op('unless_i', $i0, $donelabel),
op('pop_i', $i19, $bstack),
op('islist', $i0, $cstack),
op('unless_i', $i0, $cstacklabel),
op('elems', $i0, $cstack),
op('gt_i', $i0, $i0, $zero),
op('unless_i', $i0, $cstacklabel),
op('dec_i', $i19),
op('atpos_o', $P11, $cstack, $i19),
$cstacklabel,
op('pop_i', $rep, $bstack),
op('pop_i', $pos, $bstack),
op('pop_i', $i19, $bstack),
op('lt_i', $i0, $pos, $negone),
op('if_i', $i0, $donelabel),
op('lt_i', $i0, $pos, $zero),
op('if_i', $i0, $faillabel),
op('eq_i', $i0, $i19, $zero),
op('if_i', $i0, $faillabel),
# backtrack the cursor stack
op('isnull', $i0, $cstack),
op('if_i', $i0, $jumplabel),
op('unless_o', $cstack, $jumplabel),
op('elems', $i18, $bstack),
op('le_i', $i0, $i18, $zero),
op('if_i', $i0, $cutlabel),
op('dec_i', $i18),
op('atpos_i', $i18, $bstack, $i18),
$cutlabel,
op('setelemspos', $cstack, $i18),
$jumplabel,
op('jumplist', ival(+@*RXJUMPS), $i19)
]);
nqp::push(@ins, op('goto', $_)) for @*RXJUMPS;
merge_ins(@ins, [
$donelabel,
op('findmeth', $method, $cur, sval('!cursor_fail')),
call($method, [ $Arg::obj ], $cur), # don't pass a :result so it's void
]);
MAST::InstructionList.new(@ins, $cur, $MVM_reg_obj)
}
method children($node) {
my @masts := nqp::list();
my @results := nqp::list();
my @result_kinds := nqp::list();
for @($node) {
my $mast := $*QASTCOMPILER.as_mast($_);
merge_ins(@masts, $mast.instructions);
nqp::push(@results, $mast.result_reg);
nqp::push(@result_kinds, $mast.result_kind);
}
[@masts, @results, @result_kinds]
}
method alt($node) {
unless $node.name {
return self.altseq($node);
}
# Calculate all the branches to try, which populates the bstack
# with the options. Then immediately fail to start iterating it.
my $prefix := $*QASTCOMPILER.unique($*RXPREFIX ~ '_alt');
my $endlabel_index := rxjump($prefix ~ '_end');
my $endlabel := @*RXJUMPS[$endlabel_index];
my @ins := nqp::list();
my @label_ins := nqp::list();
nqp::push(@label_ins, op('bootintarray', %*REG<P11>));
nqp::push(@label_ins, op('create', %*REG<P11>, %*REG<P11>));
self.regex_mark(@ins, $endlabel_index, %*REG<negone>, %*REG<zero>);
nqp::push(@ins, op('findmeth', %*REG<method>, %*REG<cur>, sval('!alt')));
my $name := fresh_s();
nqp::push(@ins, op('const_s', $name, sval($node.name)));
nqp::push(@ins, call(%*REG<method>, [ $Arg::obj, $Arg::int, $Arg::str, $Arg::obj ],
%*REG<cur>, %*REG<pos>, $name, %*REG<P11>));
release($name, $MVM_reg_str);
nqp::push(@ins, op('goto', %*REG<fail>));
# Emit all the possible alternatives
my $altcount := 0;
my $iter := nqp::iterator($node.list);
my $itmp := fresh_i();
while $iter {
my $altlabel_index := rxjump($prefix ~ $altcount);
my $altlabel := @*RXJUMPS[$altlabel_index];
my @amast := self.regex_mast(nqp::shift($iter));
nqp::push(@ins, $altlabel);
merge_ins(@ins, @amast);
nqp::push(@ins, op('goto', $endlabel));
nqp::push(@label_ins, op('const_i64', $itmp, ival($altlabel_index)));
nqp::push(@label_ins, op('push_i', %*REG<P11>, $itmp));
$altcount++;
}
release($itmp, $MVM_reg_int64);
nqp::push(@ins, $endlabel);
self.regex_commit(@ins, $endlabel_index) if $node.backtrack eq 'r';
merge_ins(@label_ins, @ins);
@label_ins # so the label array creation happens first
}
method altseq($node) {
my @ins := nqp::list();
my $prefix := $*QASTCOMPILER.unique($*RXPREFIX ~ '_altseq');
my $altcount := 0;
my $iter := nqp::iterator($node.list);
my $endlabel_index := rxjump($prefix ~ '_end');
my $endlabel := @*RXJUMPS[$endlabel_index];
my $altlabel_index := rxjump($prefix ~ $altcount);
my $altlabel := @*RXJUMPS[$altlabel_index];
my @amast := self.regex_mast(nqp::shift($iter));
while $iter {
nqp::push(@ins, $altlabel);
$altcount++;
$altlabel_index := rxjump($prefix ~ $altcount);
$altlabel := @*RXJUMPS[$altlabel_index];
self.regex_mark(@ins, $altlabel_index, %*REG<pos>, %*REG<zero>);
merge_ins(@ins, @amast);
nqp::push(@ins, op('goto', $endlabel));
@amast := self.regex_mast(nqp::shift($iter));
}
nqp::push(@ins, $altlabel);
merge_ins(@ins, @amast);
nqp::push(@ins, $endlabel);
@ins
}
method anchor($node) {
my @ins := nqp::list();
my $subtype := $node.subtype;
my $donelabel := label(self.unique($*RXPREFIX ~ '_rxanchor') ~ '_done');
my $i11 := fresh_i();
my $pos := %*REG<pos>;
my $fail := %*REG<fail>;
if $subtype eq 'bos' {
nqp::push(@ins, op('ne_i', $i11, $pos, %*REG<zero>));
nqp::push(@ins, op('if_i', $i11, $fail));
}
elsif $subtype eq 'eos' {
nqp::push(@ins, op('lt_i', $i11, $pos, %*REG<eos>));
nqp::push(@ins, op('if_i', $i11, $fail));
}
elsif $subtype eq 'lwb' {
merge_ins(@ins, [
op('ge_i', $i11, $pos, %*REG<eos>),
op('if_i', $i11, $fail),
op('iscclass', $i11, %*REG<cclass_word>, %*REG<tgt>, $pos),
op('unless_i', $i11, %*REG<fail>),
op('sub_i', $i11, %*REG<pos>, %*REG<one>),
op('iscclass', $i11, %*REG<cclass_word>, %*REG<tgt>, $i11),
op('if_i', $i11, $fail)
]);
}
elsif $subtype eq 'rwb' {
merge_ins(@ins, [
op('le_i', $i11, $pos, %*REG<zero>),
op('if_i', $i11, $fail),
op('iscclass', $i11, %*REG<cclass_word>, %*REG<tgt>, $pos),
op('if_i', $i11, %*REG<fail>),
op('sub_i', $i11, %*REG<pos>, %*REG<one>),
op('iscclass', $i11, %*REG<cclass_word>, %*REG<tgt>, $i11),
op('unless_i', $i11, $fail)
]);
}
elsif $subtype eq 'bol' {
merge_ins(@ins, [
op('eq_i', $i11, %*REG<pos>, %*REG<zero>),
op('if_i', $i11, $donelabel),
op('ge_i', $i11, $pos, %*REG<eos>),
op('if_i', $i11, $fail),
op('sub_i', $i11, %*REG<pos>, %*REG<one>),
op('iscclass', $i11, %*REG<cclass_newline>, %*REG<tgt>, $i11),
op('unless_i', $i11, $fail),
$donelabel
]);
}
elsif $subtype eq 'eol' {
merge_ins(@ins, [
op('iscclass', $i11, %*REG<cclass_newline>, %*REG<tgt>, %*REG<pos>),
op('if_i', $i11, $donelabel),
op('ne_i', $i11, %*REG<pos>, %*REG<eos>),
op('if_i', $i11, $fail),
op('eq_i', $i11, %*REG<pos>, %*REG<zero>),
op('if_i', $i11, $donelabel),
op('sub_i', $i11, %*REG<pos>, %*REG<one>),
op('iscclass', $i11, %*REG<cclass_newline>, %*REG<tgt>, $i11),
op('if_i', $i11, $fail),
$donelabel
]);
}
elsif $subtype eq 'fail' {
nqp::push(@ins, op('goto', $fail));
}
elsif $subtype eq 'pass' || $subtype eq '' {
# Nothing to do.
} elsif $subtype eq 'zerowidth' {
# Nothing to do either. This gets generated for <???>, for example
}
else {
nqp::die("Unknown anchor subtype $subtype");
}
release($i11, $MVM_reg_int64);
@ins
}
my %cclass_code;
INIT {
%cclass_code<.> := nqp::const::CCLASS_ANY;
%cclass_code<d> := nqp::const::CCLASS_NUMERIC;
%cclass_code<s> := nqp::const::CCLASS_WHITESPACE;
%cclass_code<w> := nqp::const::CCLASS_WORD;
%cclass_code<n> := nqp::const::CCLASS_NEWLINE;
}
method cclass($node) {
my $subtype := $node.name;
my $cclass := %cclass_code{ $subtype };
self.panic("Unrecognized subtype '$subtype' in QAST::Regex cclass")
unless $cclass;
my @ins := nqp::list();
my $i0 := fresh_i();
nqp::push(@ins, op('ge_i', $i0, %*REG<pos>, %*REG<eos>));
nqp::push(@ins, op('if_i', $i0, %*REG<fail>));
if $cclass != nqp::const::CCLASS_ANY {
my $testop := $node.negate ?? 'if_i' !! 'unless_i';
nqp::push(@ins, op('const_i64', $i0, ival($cclass)));
nqp::push(@ins, op('iscclass', $i0, $i0, %*REG<tgt>, %*REG<pos>));
nqp::push(@ins, op($testop, $i0, %*REG<fail>));
if $cclass == nqp::const::CCLASS_NEWLINE && $node.subtype ne 'zerowidth' {
my $s0 := fresh_s();
nqp::push(@ins, op('const_s', $s0, sval("\r\n")));
nqp::push(@ins, op('eqat_s', $i0, %*REG<tgt>, $s0, %*REG<pos>));
nqp::push(@ins, op('add_i', %*REG<pos>, %*REG<pos>, $i0));
release($s0, $MVM_reg_str);
}
}
nqp::push(@ins, op('inc_i', %*REG<pos>)) unless $node.subtype eq 'zerowidth';
release($i0, $MVM_reg_int64);
@ins
}
method concat($node) {
my @ins := nqp::list();
merge_ins(@ins, self.regex_mast($_)) for $node.list;
@ins
}
method conj($node) { self.conjseq($node) }
method conjseq($node) {
my $prefix := $*QASTCOMPILER.unique($*RXPREFIX ~ '_rxconj');
my $conjlabel_index := rxjump($prefix ~ '_fail');
my $conjlabel := @*RXJUMPS[$conjlabel_index];
my $firstlabel := label($prefix ~ '_first');
my $iter := nqp::iterator($node.list);
my @ins := [
op('goto', $firstlabel),
$conjlabel,
op('goto', %*REG<fail>),
# call the first child
$firstlabel
];
# make a mark that holds our starting position in the pos slot
self.regex_mark(@ins, $conjlabel_index, %*REG<pos>, %*REG<zero>);
merge_ins(@ins, self.regex_mast(nqp::shift($iter)));
# use previous mark to make one with pos=start, rep=end
my $i11 := fresh_i();
my $i12 := fresh_i();
self.regex_peek(@ins, $conjlabel_index, $i11);
self.regex_mark(@ins, $conjlabel_index, $i11, %*REG<pos>);
while $iter {
nqp::push(@ins, op('set', %*REG<pos>, $i11));
merge_ins(@ins, self.regex_mast(nqp::shift($iter)));
self.regex_peek(@ins, $conjlabel_index, $i11, $i12);
nqp::push(@ins, op('ne_i', $i12, %*REG<pos>, $i12));
nqp::push(@ins, op('if_i', $i12, %*REG<fail>));
}
nqp::push(@ins, op('set', %*REG<pos>, $i11)) if $node.subtype eq 'zerowidth';
release($i11, $MVM_reg_int64);
release($i12, $MVM_reg_int64);
@ins
}
method enumcharlist($node) {
my @ins;
my $op := $node.negate ?? 'indexnat' !! 'indexat';
nqp::push(@ins, op($op, %*REG<tgt>, %*REG<pos>, sval($node[0]), %*REG<fail>));
nqp::push(@ins, op('inc_i', %*REG<pos>))
unless $node.subtype eq 'zerowidth';
@ins
}
method charrange($node) {
my @ins;
my $i0 := fresh_i();
my $i1 := fresh_i();
my $lower := fresh_i();
my $upper := fresh_i();
merge_ins(@ins, [
op('ge_i', $i0, %*REG<pos>, %*REG<eos>),
op('if_i', $i0, %*REG<fail>),
op('const_i64', $lower, ival($node[1].value)),
op('const_i64', $upper, ival($node[2].value)),
]);
if $node[0] eq 'ignorecase' {
my $s0 := fresh_s();
my $s1 := fresh_s();
my $i2 := fresh_i();
my $succeed := label($*QASTCOMPILER.unique($*RXPREFIX ~ '_charrange_ic'));
my $goal := $node.negate ?? %*REG<fail> !! $succeed;
merge_ins(@ins, [
op('const_i64', $i2, ival(1)),
op('substr_s', $s0, %*REG<tgt>, %*REG<pos>, $i2),
op('lc', $s1, $s0),
op('ordfirst', $i0, $s1),
op('ge_i', $i1, $i0, $lower),
op('le_i', $i2, $i0, $upper),
op('bitand_i', $i1, $i1, $i2),
op('if_i', $i1, $goal),
op('uc', $s1, $s0),
op('ordfirst', $i0, $s1),
op('ge_i', $i1, $i0, $lower),
op('le_i', $i2, $i0, $upper),
op('bitand_i', $i1, $i1, $i2),
op('if_i', $i1, $goal),
]);
unless $node.negate {
nqp::push(@ins, op('goto', %*REG<fail>));
nqp::push(@ins, $succeed);
}
}
else {
my $succeed := label($*QASTCOMPILER.unique($*RXPREFIX ~ '_charrange'));
my $goal := $node.negate ?? $succeed !! %*REG<fail>;
merge_ins(@ins, [
op('ordat', $i0, %*REG<tgt>, %*REG<pos>),
op('gt_i', $i1, $i0, $upper),
op('if_i', $i1, $goal),
op('lt_i', $i1, $i0, $lower),
op('if_i', $i1, $goal),
]);
if $node.negate {
nqp::push(@ins, op('goto', %*REG<fail>));
nqp::push(@ins, $succeed);
}
}
nqp::push(@ins, op('inc_i', %*REG<pos>)) unless $node.subtype eq 'zerowidth';
release($i0, $MVM_reg_int64);
release($i1, $MVM_reg_int64);
release($lower, $MVM_reg_int64);
release($upper, $MVM_reg_int64);
@ins
}
method literal($node) {
my $litconst := $node[0];
my $eq_op := $node.subtype eq 'ignorecase' ?? 'eqatic_s' !! 'eqat_s';
my $s0 := fresh_s();
my $i0 := fresh_i();
my $cmpop := $node.negate ?? 'if_i' !! 'unless_i';
my @ins;
if $node.negate {
# Need explicit check we're not going beyond the string end in the
# negated case, to avoid false positive.
nqp::push(@ins, op('const_i64', $i0, ival(nqp::chars($litconst))));
nqp::push(@ins, op('add_i', $i0, %*REG<pos>, $i0));
nqp::push(@ins, op('gt_i', $i0, $i0, %*REG<eos>));
nqp::push(@ins, op('if_i', $i0, %*REG<fail>));
}
# XXX create some regex prologue system so these const assignments
# can happen only once at the beginning of a regex. hash of string constants
# to the registers to which they are assigned.
# XXX or make a specialized eqat_sc op that takes a constant string.
nqp::push(@ins, op('const_s', $s0, sval($litconst)));
# also, consider making the op branch directly from the comparison
# instead of storing an integer to a temporary register
nqp::push(@ins, op($eq_op, $i0, %*REG<tgt>, $s0, %*REG<pos>));
nqp::push(@ins, op($cmpop, $i0, %*REG<fail>));
unless $node.subtype eq 'zerowidth' {
nqp::push(@ins, op('const_i64', $i0, ival(nqp::chars($litconst))));
nqp::push(@ins, op('add_i', %*REG<pos>, %*REG<pos>, $i0));
}
release($s0, $MVM_reg_str);
release($i0, $MVM_reg_int64);
@ins
}
method pass($node) {
my @ins := nqp::list();
my @args := [%*REG<cur>, %*REG<pos>];
my @flags := [$Arg::obj, $Arg::int];
my $op;
my $meth := fresh_o();
nqp::push(@ins, op('findmeth', $meth, %*REG<cur>, sval('!cursor_pass')));
if $node.name {
my $sname := fresh_s();
nqp::push(@ins, op('const_s', $sname, sval($node.name)));
nqp::push(@args, $sname);
nqp::push(@flags, $Arg::str);
}
elsif +@($node) == 1 {
my $name := $*QASTCOMPILER.as_mast($node[0], :want($MVM_reg_str));
merge_ins(@ins, $name.instructions);
nqp::push(@args, $name.result_reg);
nqp::push(@flags, $Arg::str);
}
if $node.backtrack ne 'r' {
nqp::push(@args, sval('backtrack'));
nqp::push(@args, %*REG<one>);
nqp::push(@flags, $Arg::named +| $Arg::int);
}
nqp::push(@ins, call($meth, @flags, :result($meth), |@args));
release($meth, $MVM_reg_obj);
nqp::push(@ins, op('return_o', %*REG<cur>));
@ins
}
sub resolve_condition_op($kind, $negated) {
return $negated ??
$kind == $MVM_reg_int64 ?? 'unless_i' !!
$kind == $MVM_reg_num64 ?? 'unless_n' !!
$kind == $MVM_reg_str ?? 'unless_s' !!
$kind == $MVM_reg_obj ?? 'unless_o' !!
''
!! $kind == $MVM_reg_int64 ?? 'if_i' !!
$kind == $MVM_reg_num64 ?? 'if_n' !!
$kind == $MVM_reg_str ?? 'if_s' !!
$kind == $MVM_reg_obj ?? 'if_o' !!
''
}
method qastnode($node) {
my @ins := [
op('bindattr_i', %*REG<cur>, %*REG<curclass>, sval('$!pos'), %*REG<pos>, ival(-1)),
op('bindlex', $*BLOCK.resolve_lexical('$¢'), %*REG<cur>)
];
my $cmast := $*QASTCOMPILER.as_mast($node[0]);
merge_ins(@ins, $cmast.instructions);
release($cmast.result_reg, $cmast.result_kind);
my $cndop := resolve_condition_op($cmast.result_kind, !$node.negate);
if $node.subtype eq 'zerowidth' && $cndop ne '' {
nqp::push(@ins, op('decont', $cmast.result_reg, $cmast.result_reg))
if $cmast.result_kind == $MVM_reg_obj;
nqp::push(@ins, op($cndop, $cmast.result_reg, %*REG<fail>));
}
@ins
}
method dynquant($node) {
my @ins := nqp::list();
my $backtrack := $node.backtrack || 'g';
my $sep := $node[2];
my $prefix := self.unique($*RXPREFIX ~ '_rxdynquant_' ~ $backtrack);
my $looplabel_index := rxjump($prefix ~ '_loop');
my $looplabel := @*RXJUMPS[$looplabel_index];
my $donelabel_index := rxjump($prefix ~ '_done');
my $donelabel := @*RXJUMPS[$donelabel_index];
my $skip0label := label($prefix ~ '_skip0');
my $skip1label := label($prefix ~ '_skip1');
my $skip2label := label($prefix ~ '_skip2');
my $skip3label := label($prefix ~ '_skip3');
my $skip4label := label($prefix ~ '_skip4');
my $skip5label := label($prefix ~ '_skip5');
my $skip6label := label($prefix ~ '_skip6');
my $skip7label := label($prefix ~ '_skip7');
my $skip8label := label($prefix ~ '_skip8');
my $needrep := fresh_i();
my $needmark := fresh_i();
my $rep := %*REG<rep>;
my $pos := %*REG<pos>;
my $ireg := fresh_i();
my $minmax := $node[1];
my $minmax_reg := fresh_o();
my $min_reg := fresh_i();
my $max_reg := fresh_i();
my $zero := fresh_i();
my $one := fresh_i();
my $minmax_mast := $*QASTCOMPILER.as_mast($minmax, :want($MVM_reg_obj));
my $res_reg := $minmax_mast.result_reg;
merge_ins(@ins, $minmax_mast.instructions);
merge_ins(@ins, [
op('const_i64', $zero, ival(0)),
op('const_i64', $one, ival(1)),
op('atpos_i', $min_reg, $res_reg, $zero),
op('atpos_i', $max_reg, $res_reg, $one),
]);
# return if $min == 0 && $max == 0;
merge_ins(@ins, [
op('if_i', $min_reg, $skip8label),
op('unless_i', $max_reg, $skip7label),
$skip8label
]);
# $needrep := $min > 1 || $max > 1;
merge_ins(@ins, [
op('gt_i', $needrep, $min_reg, $one),
op('if_i', $needrep, $skip0label),
op('gt_i', $needrep, $max_reg, $one),
$skip0label
]);
# $needmark := $needrep || $backtrack eq 'r';
if $backtrack eq 'r' {
nqp::push(@ins, op('set', $needmark, $one));
}
else {
nqp::push(@ins, op('set', $needmark, $needrep));
}
if $backtrack eq 'f' {
my $seplabel := label($prefix ~ '_sep');
nqp::push(@ins, op('set', $rep, %*REG<zero>));
nqp::push(@ins, op('ge_i', $ireg, $min_reg, $one)); # if $min < 1 {
nqp::push(@ins, op('if_i', $ireg, $skip1label));
self.regex_mark(@ins, $looplabel_index, $pos, $rep);
nqp::push(@ins, op('goto', $donelabel));
nqp::push(@ins, $skip1label); # }
nqp::push(@ins, op('goto', $seplabel)) if $sep;
nqp::push(@ins, $looplabel);
nqp::push(@ins, op('set', $ireg, $rep));
if $sep {
merge_ins(@ins, self.regex_mast($sep));
nqp::push(@ins, $seplabel);
}
merge_ins(@ins, self.regex_mast($node[0]));
merge_ins(@ins, [
op('set', $rep, $ireg),
op('inc_i', $rep),
op('le_i', $ireg, $min_reg, $one), # if $min > 1 {
op('if_i', $ireg, $skip2label),
op('lt_i', $ireg, $rep, $min_reg),
op('if_i', $ireg, $looplabel),
$skip2label, # }
op('le_i', $ireg, $max_reg, $one), # if $max > 1 {
op('if_i', $ireg, $skip3label),
op('ge_i', $ireg, $rep, $max_reg),
op('if_i', $ireg, $donelabel),
$skip3label, # }
op('eq_i', $ireg, $max_reg, $one), # unless $max == 1 {
op('if_i', $ireg, $skip4label),
]);
self.regex_mark(@ins, $looplabel_index, $pos, $rep);
nqp::push(@ins, $skip4label); # }
nqp::push(@ins, $donelabel);
}
else {
nqp::push(@ins, op('if_i', $min_reg, $skip1label)); # if $min == 0 {
self.regex_mark(@ins, $donelabel_index, $pos, %*REG<zero>);
nqp::push(@ins, $skip1label); # }
nqp::push(@ins, op('unless_i', $min_reg, $skip2label)); # elsif $needmark {
nqp::push(@ins, op('unless_i', $needmark, $skip2label));
self.regex_mark(@ins, $donelabel_index, %*REG<negone>, %*REG<zero>);
nqp::push(@ins, $skip2label); # }
nqp::push(@ins, $looplabel);
merge_ins(@ins, self.regex_mast($node[0]));
nqp::push(@ins, op('unless_i', $needmark, $skip3label)); # if $needmark {
self.regex_peek(@ins, $donelabel_index, MAST::Local.new(:index(-1)), $rep);
self.regex_commit(@ins, $donelabel_index) if $backtrack eq 'r';
merge_ins(@ins, [
op('inc_i', $rep),
op('le_i', $ireg, $max_reg, $one), # if $max > 1 {
op('if_i', $ireg, $skip4label),
op('ge_i', $ireg, $rep, $max_reg),
op('if_i', $ireg, $donelabel),
$skip4label, # }
$skip3label, # }
op('eq_i', $ireg, $max_reg, $one), # unless $max == 1 {
op('if_i', $ireg, $skip5label),
]);
self.regex_mark(@ins, $donelabel_index, $pos, $rep);
merge_ins(@ins, self.regex_mast($sep)) if $sep;
merge_ins(@ins, [
op('goto', $looplabel),
$skip5label, # }
$donelabel,
op('le_i', $ireg, $min_reg, $one), # if $min > 1 {
op('if_i', $ireg, $skip6label),
op('lt_i', $ireg, $rep, $min_reg),
op('if_i', $ireg, %*REG<fail>),
$skip6label, # }
]);
}
nqp::push(@ins, $skip7label);
@ins
}
method quant($node) {
my @ins := nqp::list();
my $min := $node.min;
my $max := $node.max;
if $min == 0 && $max == 0 {
# Nothing to do, and nothing to backtrack into.
return @ins;
}
my $backtrack := $node.backtrack || 'g';
my $sep := $node[1];
my $prefix := self.unique($*RXPREFIX ~ '_rxquant_' ~ $backtrack);
my $looplabel_index := rxjump($prefix ~ '_loop');
my $looplabel := @*RXJUMPS[$looplabel_index];
my $donelabel_index := rxjump($prefix ~ '_done');
my $donelabel := @*RXJUMPS[$donelabel_index];
my $needrep := $min > 1 || $max > 1;
my $needmark := $needrep || $backtrack eq 'r';
my $rep := %*REG<rep>;
my $pos := %*REG<pos>;
my $ireg := $*REGALLOC.fresh_register($MVM_reg_int64, 1); # Must be regex-unique
if $backtrack eq 'f' {
my $seplabel := label($prefix ~ '_sep');
nqp::push(@ins, op('set', $rep, %*REG<zero>));
if $min < 1 {
self.regex_mark(@ins, $looplabel_index, $pos, $rep);
nqp::push(@ins, op('goto', $donelabel));
}
nqp::push(@ins, op('goto', $seplabel)) if $sep;
nqp::push(@ins, $looplabel);
nqp::push(@ins, op('set', $ireg, $rep));
if $sep {
merge_ins(@ins, self.regex_mast($sep));
nqp::push(@ins, $seplabel);
}
merge_ins(@ins, self.regex_mast($node[0]));
nqp::push(@ins, op('set', $rep, $ireg));
nqp::push(@ins, op('inc_i', $rep));
if $min > 1 {
my $minreg := fresh_i();
nqp::push(@ins, op('const_i64', $minreg, ival($min)));
nqp::push(@ins, op('lt_i', $ireg, $rep, $minreg));
nqp::push(@ins, op('if_i', $ireg, $looplabel));
release($minreg, $MVM_reg_int64);
}
if $max > 1 {
my $maxreg := fresh_i();
nqp::push(@ins, op('const_i64', $maxreg, ival($max)));
nqp::push(@ins, op('ge_i', $ireg, $rep, $maxreg));
nqp::push(@ins, op('if_i', $ireg, $donelabel));
release($maxreg, $MVM_reg_int64);
}
self.regex_mark(@ins, $looplabel_index, $pos, $rep) if $max != 1;
nqp::push(@ins, $donelabel);
}
else {
if $min == 0 { self.regex_mark(@ins, $donelabel_index, $pos, %*REG<zero>); }
elsif $needmark { self.regex_mark(@ins, $donelabel_index, %*REG<negone>, %*REG<zero>); }
nqp::push(@ins, $looplabel);
merge_ins(@ins, self.regex_mast($node[0]));
if $needmark {
self.regex_peek(@ins, $donelabel_index, MAST::Local.new(:index(-1)), $rep);
self.regex_commit(@ins, $donelabel_index) if $backtrack eq 'r';
nqp::push(@ins, op('inc_i', $rep));
if $max > 1 {
my $maxreg := fresh_i();
nqp::push(@ins, op('const_i64', $maxreg, ival($max)));
nqp::push(@ins, op('ge_i', $ireg, $rep, $maxreg));
nqp::push(@ins, op('if_i', $ireg, $donelabel));
release($maxreg, $MVM_reg_int64);
}
}
unless $max == 1 {
self.regex_mark(@ins, $donelabel_index, $pos, $rep);
merge_ins(@ins, self.regex_mast($sep)) if $sep;
nqp::push(@ins, op('goto', $looplabel));
}
nqp::push(@ins, $donelabel);
if $min > 1 {
my $minreg := fresh_i();
nqp::push(@ins, op('const_i64', $minreg, ival($min)));
nqp::push(@ins, op('lt_i', $ireg, $rep, $minreg));
nqp::push(@ins, op('if_i', $ireg, %*REG<fail>));
release($minreg, $MVM_reg_int64);
}
}
@ins
}
method scan($node) {
my $prefix := self.unique($*RXPREFIX ~ '_rxscan');
my $looplabel_index := rxjump($prefix ~ '_loop');
my $looplabel := @*RXJUMPS[$looplabel_index];
my $scanlabel := label($prefix ~ '_scan');
my $donelabel := label($prefix ~ '_done');
my $ireg0 := fresh_i();
my @ins := [
op('getattr_i', $ireg0, %*REG<self>, %*REG<curclass>, sval('$!from'),
ival(nqp::hintfor($*cursor_type, '$!from'))),
op('ne_i', $ireg0, $ireg0, %*REG<negone>),
op('if_i', $ireg0, $donelabel),
op('goto', $scanlabel),
$looplabel,
op('inc_i', %*REG<pos>),
];
if $node.list && $node.subtype ne 'ignorecase' {
my $lit := fresh_s();
nqp::push(@ins, op('const_s', $lit, sval($node[0])));
nqp::push(@ins, op('index_s', %*REG<pos>, %*REG<tgt>, $lit, %*REG<pos>));
nqp::push(@ins, op('eq_i', $ireg0, %*REG<pos>, %*REG<negone>));
release($lit, $MVM_reg_str);
}
else {
nqp::push(@ins, op('gt_i', $ireg0, %*REG<pos>, %*REG<eos>));
}
nqp::push(@ins, op('if_i', $ireg0, %*REG<fail>));
nqp::push(@ins, op('bindattr_i', %*REG<cur>, %*REG<curclass>, sval('$!from'), %*REG<pos>, ival(-1)));
nqp::push(@ins, $scanlabel);
self.regex_mark(@ins, $looplabel_index, %*REG<pos>, %*REG<zero>);
nqp::push(@ins, $donelabel);
@ins
}
method subcapture($node) {
my @ins := nqp::list();
my $prefix := self.unique($*RXPREFIX ~ '_rxcap');
my $donelabel := label($prefix ~ '_done');
my $faillabel_index := rxjump($prefix ~ '_fail');
my $faillabel := @*RXJUMPS[$faillabel_index];
my $i11 := fresh_i();
my $p11 := fresh_o();
my $s11 := fresh_s();
self.regex_mark(@ins, $faillabel_index, %*REG<pos>, %*REG<zero>);
merge_ins(@ins, self.regex_mast($node[0]));
self.regex_peek(@ins, $faillabel_index, $i11);
merge_ins(@ins, [
op('bindattr_i', %*REG<cur>, %*REG<curclass>, sval('$!pos'),
%*REG<pos>, ival(-1)),
op('findmeth', %*REG<method>, %*REG<cur>, sval('!cursor_start_subcapture')),
call(%*REG<method>, [$Arg::obj, $Arg::int], %*REG<cur>, $i11, :result($p11)),
op('findmeth', %*REG<method>, $p11, sval('!cursor_pass')),
call(%*REG<method>, [$Arg::obj, $Arg::int], $p11, %*REG<pos>),
op('findmeth', %*REG<method>, %*REG<cur>, sval('!cursor_capture')),
op('const_s', $s11, sval($node.name)),
call(%*REG<method>, [$Arg::obj, $Arg::obj, $Arg::str],
%*REG<cur>, $p11, $s11, :result(%*REG<cstack>)),
op('goto', $donelabel),
$faillabel,
op('goto', %*REG<fail>),
$donelabel
]);
release($i11, $MVM_reg_int64);
release($p11, $MVM_reg_obj);
release($s11, $MVM_reg_str);
@ins
}
my @kind_to_args := [0,
$Arg::int, # $MVM_reg_int8 := 1;
$Arg::int, # $MVM_reg_int16 := 2;
$Arg::int, # $MVM_reg_int32 := 3;
$Arg::int, # $MVM_reg_int64 := 4;
$Arg::num, # $MVM_reg_num32 := 5;
$Arg::num, # $MVM_reg_num64 := 6;
$Arg::str, # $MVM_reg_str := 7;
$Arg::obj # $MVM_reg_obj := 8;
];
method subrule($node) {
my @ins := nqp::list();
my $subtype := $node.subtype;
my $testop := $node.negate ?? 'ge_i' !! 'lt_i';
my $captured := 0;
my $cpn := self.children($node[0]);
my @pargs := $cpn[1];
my @pkinds := $cpn[2]; # positional result registers
my $submast := nqp::shift(@pargs);
my $submast_kind := nqp::shift(@pkinds);
release($submast, $submast_kind);
my $i := 0;
my @flags := [$Arg::obj];
for @pkinds {
nqp::push(@flags, @kind_to_args[$_]);
release(@pargs[$i++], $_);
}
my $p11 := %*REG<P11>;
my $i11 := fresh_i();
merge_ins(@ins, $cpn[0]);
merge_ins(@ins, [
op('bindattr_i', %*REG<cur>, %*REG<curclass>, sval('$!pos'),
%*REG<pos>, ival(-1))
]);
if nqp::istype($node[0][0], QAST::SVal) {
# Method call.
merge_ins(@ins, [
op('findmeth', %*REG<method>, %*REG<cur>, sval($node[0][0].value)),
call(%*REG<method>, @flags, %*REG<cur>, |@pargs, :result($p11))
]);
}
else {
# Normal invocation (probably positional capture).
merge_ins(@ins, [
call($submast, @flags, %*REG<cur>, |@pargs, :result($p11))
]);
}
merge_ins(@ins, [
op('getattr_i', $i11, $p11, %*REG<curclass>, sval('$!pos'),
ival(nqp::hintfor($*cursor_type, '$!pos'))),
op($testop, $i11, $i11, %*REG<zero>),
op('if_i', $i11, %*REG<fail>)
]);
if $subtype ne 'zerowidth' {