3 # Use B to test that optimisations are not inadvertently removed,
4 # by examining particular nodes in the optree.
9 skip_all_if_miniperl("No B under miniperl");
16 use B qw(svref_2object
17 OPpASSIGN_COMMON_SCALAR
23 # Test that OP_AASSIGN gets the appropriate
24 # OPpASSIGN_COMMON* flags set.
26 # Too few flags set is likely to cause code to misbehave;
27 # too many flags set unnecessarily slows things down.
28 # See also the tests in t/op/aassign.t
31 # Each anon array contains:
34 # a 3 char string, each char showing whether we expect a
35 # particular flag to be set:
36 # '-' indicates any char not set, while
37 # 'S': char 0: OPpASSIGN_COMMON_SCALAR,
38 # 'R': char 1: OPpASSIGN_COMMON_RC1,
39 # 'A' char 2: OPpASSIGN_COMMON_AGG,
44 [ "---", '() = (1, $x, my $y, @z, f($p))', 'no LHS' ],
45 [ "---", '(undef, $x, my $y, @z, ($a ? $b : $c)) = ()', 'no RHS' ],
46 [ "---", '(undef, $x, my $y, @z, ($a ? $b : $c)) = (1,2)', 'safe RHS' ],
47 [ "---", 'my @a = (1,2)', 'safe RHS: my array' ],
48 [ "---", 'my %h = (1,2)', 'safe RHS: my hash' ],
49 [ "---", 'my ($a,$b,$c,$d) = 1..6; ($a,$b) = ($c,$d);', 'non-common lex' ],
50 [ "---", '($x,$y) = (1,2)', 'pkg var LHS only' ],
51 [ "---", 'my $p; my ($x,$y) = ($p, $p)', 'my; dup lex var on RHS' ],
52 [ "---", 'my $p; my ($x,$y); ($x,$y) = ($p, $p)', 'dup lex var on RHS' ],
53 [ "---", 'my ($self) = @_', 'LHS lex scalar only' ],
54 [ "--A", 'my ($self, @rest) = @_', 'LHS lex mixed' ],
55 [ "-R-", 'my ($x,$y) = ($p, $q)', 'pkg var RHS only' ],
56 [ "S--", '($x,$y) = ($p, $q)', 'pkg scalar both sides' ],
57 [ "--A", 'my (@a, @b); @a = @b', 'lex ary both sides' ],
58 [ "-R-", 'my ($x,$y,$z,@a); ($x,$y,$z) = @a ', 'lex vars to lex ary' ],
59 [ "--A", '@a = @b', 'pkg ary both sides' ],
60 [ "--A", 'my (%a,%b); %a = %b', 'lex hash both sides' ],
61 [ "--A", '%a = %b', 'pkg hash both sides' ],
62 [ "--A", 'my $x; @a = ($a[0], $a[$x])', 'common ary' ],
63 [ "--A", 'my ($x,@a); @a = ($a[0], $a[$x])', 'common lex ary' ],
64 [ "S-A", 'my $x; ($a[$x], $a[0]) = ($a[0], $a[$x])', 'common ary elems' ],
65 [ "S-A", 'my ($x,@a); ($a[$x], $a[0]) = ($a[0], $a[$x])',
66 'common lex ary elems' ],
67 [ "--A", 'my $x; my @a = @$x', 'lex ary may have stuff' ],
68 [ "-RA", 'my $x; my ($b, @a) = @$x', 'lex ary may have stuff' ],
69 [ "--A", 'my $x; my %a = @$x', 'lex hash may have stuff' ],
70 [ "-RA", 'my $x; my ($b, %a) = @$x', 'lex hash may have stuff' ],
71 [ "--A", 'my (@a,@b); @a = ($b[0])', 'lex ary and elem' ],
72 [ "S-A", 'my @a; ($a[1],$a[0]) = @a', 'lex ary and elem' ],
73 [ "--A", 'my @x; @y = $x[0]', 'pkg ary from lex elem' ],
74 [ "---", '(undef,$x) = f()', 'single scalar on LHS' ],
75 [ "---", '($x,$y) = ($x)', 'single scalar on RHS, no AGG' ],
76 [ "--A", '($x,@b) = ($x)', 'single scalar on RHS' ],
77 [ "--A", 'my @a; @a = (@a = split())', 'split a/a' ],
78 [ "--A", 'my (@a,@b); @a = (@b = split())', 'split a/b' ],
79 [ "---", 'my @a; @a = (split(), 1)', '(split(),1)' ],
80 [ "---", '@a = (split(//, @a), 1)', 'split(@a)' ],
81 [ "--A", 'my @a; my $ar = @a; @a = (@$ar = split())', 'a/ar split' ],
83 my ($exp, $code, $desc) = @$test;
84 my $sub = eval "sub { $code }"
86 "aassign eval('$code') failed: this test needs to be rewritten:\n"
89 my $last_expr = svref_2object($sub)->ROOT->first->last;
90 if ($last_expr->name ne 'aassign') {
91 die "Expected aassign but found ", $last_expr->name,
92 "; this test needs to be rewritten"
95 (($last_expr->private & OPpASSIGN_COMMON_SCALAR) ? 'S' : '-')
96 . (($last_expr->private & OPpASSIGN_COMMON_RC1) ? 'R' : '-')
97 . (($last_expr->private & OPpASSIGN_COMMON_AGG) ? 'A' : '-');
98 is $got, $exp, "OPpASSIGN_COMMON: $desc: '$code'";
102 # join -> stringify/const
104 for (['CONSTANT', sub { join "foo", $_ }],
105 ['$var' , sub { join $_ , $_ }],
106 ['$myvar' , sub { my $var; join $var, $_ }],
109 my $last_expr = svref_2object($sub)->ROOT->first->last;
110 is $last_expr->name, 'stringify',
111 "join($sep, \$scalar) optimised to stringify";
114 for (['CONSTANT', sub { join "foo", "bar" }, 0, "bar" ],
115 ['CONSTANT', sub { join "foo", "bar", 3 }, 1, "barfoo3"],
116 ['$var' , sub { join $_ , "bar" }, 0, "bar" ],
117 ['$myvar' , sub { my $var; join $var, "bar" }, 0, "bar" ],
119 my($sep,$sub,$is_list,$expect) = @$_;
120 my $last_expr = svref_2object($sub)->ROOT->first->last;
121 my $tn = "join($sep, " . ($is_list?'list of constants':'const') . ")";
122 is $last_expr->name, 'const', "$tn optimised to constant";
123 is $sub->(), $expect, "$tn folded correctly";
127 # list+pushmark in list context elided out of the execution chain
128 is svref_2object(sub { () = ($_, ($_, $_)) })
132 ->next # should be gvsv, not pushmark
134 "list+pushmark in list context where list's elder sibling is a null";
137 # nextstate multiple times becoming one nextstate
139 is svref_2object(sub { 0;0;0;0;0;0;time })->START->next->name, 'time',
140 'multiple nextstates become one';
143 # pad[ahs]v state declarations in void context
145 is svref_2object(sub{state($foo,@fit,%far);state $bar;state($a,$b); time})
146 ->START->next->name, 'time',
147 'pad[ahs]v state declarations in void context';
150 # pushmark-padsv-padav-padhv in list context --> padrange
154 my $sub = sub { \my( $f, @f, %f ) };
155 my $op = svref_2object($sub)->START;
156 push(@ops, $op->name), $op = $op->next while $$op;
157 is "@ops", "nextstate padrange refgen leavesub", 'multi-type padrange'
161 # rv2[ahs]v in void context
163 is svref_2object(sub { our($foo,@fit,%far); our $bar; our($a,$b); time })
164 ->START->next->name, 'time',
165 'rv2[ahs]v in void context';
170 for(['@pkgary' , '@_' ],
171 ['@lexary' , 'my @a; @a'],
172 ['my(@array)' , 'my(@a)' ],
173 ['local(@array)', 'local(@_)'],
174 ['@{...}' , '@{\@_}' ],
177 my $sub = eval "sub { $code = split }";
178 my $split = svref_2object($sub)->ROOT->first->last;
179 is $split->name, 'split', "$tn = split swallows up the assignment";
183 # stringify with join kid --> join
184 is svref_2object(sub { "@_" })->ROOT->first->last->name, 'join',
185 'qq"@_" optimised from stringify(join(...)) to join(...)';