addbits('aelem',
7 => qw(OPpLVAL_INTRO LVINTRO),
+ 6 => qw(OPpLVAL_DEFER LVDEFER),
'4..5' => {
mask_def => 'OPpDEREF',
enum => [ qw(
3 OPpDEREF_SV DREFSV
)],
},
- 6 => qw(OPpLVAL_DEFER LVDEFER),
);
-Here for the op C<aelem>, bits 4 and 7 (bits are numbered 0..7) are
+Here for the op C<aelem>, bits 6 and 7 (bits are numbered 0..7) are
defined as single-bit flags. The first string following the bit number is
the define name that gets emitted in F<opcode.h>, and the second string is
the label, which will be displayed by F<Concise.pm> and Perl_do_op_dump()
# find which ops use 0,1,2,3 or 4 bits of op_private for arg count info
- $args0{$_} = 1 for qw(entersub); # UNOPs that usurp bit 0
+ $args0{$_} = 1 for qw(entersub avhvswitch); # UNOPs that usurp bit 0
$args1{$_} = 1 for (
qw(reverse), # ck_fun(), but most bits stolen
+ qw(mapstart grepstart), # set in ck_fun, but
+ # cleared in ck_grep,
+ # unless there is an error
grep !$maxarg{$_} && !$args0{$_},
ops_with_flag('1'), # UNOP
+ ops_with_flag('+'), # UNOP_AUX
ops_with_flag('%'), # BASEOP/UNOP
ops_with_flag('|'), # LOGOP
ops_with_flag('-'), # FILESTATOP
for (qw(nextstate dbstate)) {
addbits($_,
5 => qw(OPpHUSH_VMSISH HUSH),
- # should match HINT_M_VMSISH_STATUS, HINT_M_VMSISH_TIME
- 6 => qw(OPpHINT_M_VMSISH_STATUS VMSISH_STATUS),
- 7 => qw(OPpHINT_M_VMSISH_TIME VMSISH_TIME),
-
);
}
addbits($_, 7 => qw(OPpLVAL_INTRO LVINTRO))
for qw(gvsv rv2sv rv2hv rv2gv rv2av aelem helem aslice
hslice delete padsv padav padhv enteriter entersub padrange
- pushmark cond_expr refassign lvref lvrefslice lvavref),
+ pushmark cond_expr refassign lvref lvrefslice lvavref multideref),
'list', # this gets set in my_attrs() for some reason
;
# Safe to set if the ppcode uses:
# tryAMAGICbin, tryAMAGICun, SETn, SETi, SETu, PUSHn, PUSHTARG, SETTARG,
# SETs(TARG), XPUSHn, XPUSHu,
+# but make sure set-magic is invoked separately for SETs(TARG) (or change
+# it to SETTARG).
#
# Unsafe to set if the ppcode uses dTARG or [X]RETPUSH[YES|NO|UNDEF]
#
-# lt and friends do SETs (including ncmp, but not scmp)
+# Only the code paths that handle scalar rvalue context matter. If dTARG
+# or RETPUSHNO occurs only in list or lvalue paths, T is safe.
+#
+# lt and friends do SETs (including ncmp, but not scmp or i_ncmp)
#
# Additional mode of failure: the opcode can modify TARG before it "used"
# all the arguments (or may call an external function which does the same).
#
# pp.c pos substr each not OK (RETPUSHUNDEF)
# ref not OK (RETPUSHNO)
-# trans not OK (dTARG; TARG = sv_newmortal();)
+# trans not OK (target is used for lhs, not retval)
# ucfirst etc not OK: TMP arg processed inplace
# quotemeta not OK (unsafe when TARG == arg)
# pack - unknown whether it is safe
# grepwhile not OK (not always setting)
# join not OK (unsafe when TARG == arg)
#
-# Suspicious wrt "additional mode of failure": concat (dealt with
-# in ck_sassign()), join (same).
+# concat - pp_concat special-cases TARG==arg to avoid
+# "additional mode of failure"
#
# pp_ctl.c
# mapwhile flip caller not OK (not always setting)
addbits($_, 4 => qw(OPpTARGET_MY TARGMY))
for ops_with_flag('T'),
- # This flag is also used to indicate matches against implicit $_,
- # where $_ is lexical; e.g. my $_; ....; /foo/
- qw(match subst trans transr);
;
# Defer creation of array/hash elem
-addbits($_, 6 => qw(OPpLVAL_DEFER LVDEFER)) for qw(aelem helem);
+addbits($_, 6 => qw(OPpLVAL_DEFER LVDEFER)) for qw(aelem helem multideref);
# We might be an lvalue to return
addbits($_, 3 => qw(OPpMAYBE_LVSUB LVSUB))
for qw(aassign rv2av rv2gv rv2hv padav padhv aelem helem aslice hslice
- av2arylen keys rkeys kvaslice kvhslice substr pos vec);
+ av2arylen keys akeys avhvswitch kvaslice kvhslice substr pos vec
+ multideref);
-addbits($_, 1 => qw(OPpHINT_STRICT_REFS STRICT)) for qw(rv2sv rv2av rv2hv rv2gv);
+addbits($_, 1 => qw(OPpHINT_STRICT_REFS STRICT))
+ for qw(rv2sv rv2av rv2hv rv2gv multideref);
+# note that for refassign, this bit can mean either OPpPAD_STATE or
+# OPpOUR_INTRO depending on the type of the LH child, .e.g.
+# \our $foo = ...
+# \state $foo = ...
+
addbits($_, 6 => qw(OPpPAD_STATE STATE)) for qw(padav padhv padsv lvavref
lvref refassign pushmark);
+# NB: both sassign and aassign use the 'OPpASSIGN' naming convention
+# for their private flags
+# there *may* be common scalar items on both sides of a list assign:
+# run-time checking will be needed.
+addbits('aassign', 6 => qw(OPpASSIGN_COMMON_SCALAR COM_SCALAR));
+#
+# as above, but it's possible to check for non-commonality with just
+# a SvREFCNT(lhs) == 1 test for each lhs element
+addbits('aassign', 5 => qw(OPpASSIGN_COMMON_RC1 COM_RC1));
+
+# run-time checking is required for an aggregate on the LHS
+addbits('aassign', 4 => qw(OPpASSIGN_COMMON_AGG COM_AGG));
-addbits('aassign', 6 => qw(OPpASSIGN_COMMON COMMON));
+# NB: both sassign and aassign use the 'OPpASSIGN' naming convention
+# for their private flags
addbits('sassign',
6 => qw(OPpASSIGN_BACKWARDS BKWARD), # Left & right switched
);
+# NB OPpITER_REVERSED must always be bit 1: see pp_iter()
addbits('enteriter',
- 2 => qw(OPpITER_REVERSED REVERSED),# for (reverse ...)
- 3 => qw(OPpITER_DEF DEF), # 'for $_' or 'for my $_'
+ 1 => qw(OPpITER_REVERSED REVERSED),# for (reverse ...)
+ 3 => qw(OPpITER_DEF DEF), # 'for $_'
);
-addbits('iter', 2 => qw(OPpITER_REVERSED REVERSED));
+addbits('iter', 1 => qw(OPpITER_REVERSED REVERSED));
-addbits($_, 1 => qw(OPpGREP_LEX GREPLEX)) # iterate over lexical $_
- for qw(mapwhile mapstart grepwhile grepstart);
-
-
-
addbits('entereval',
1 => qw(OPpEVAL_HAS_HH HAS_HH ), # Does it have a copy of %^H ?
2 => qw(OPpEVAL_UNICODE UNI ),
3 OPpLVREF_CV CV
)],
},
+ #6 => qw(OPpPAD_STATE STATE),
#7 => qw(OPpLVAL_INTRO LVINTRO),
) for 'refassign', 'lvref';
+
+
+addbits('multideref',
+ 4 => qw(OPpMULTIDEREF_EXISTS EXISTS), # deref is actually exists
+ 5 => qw(OPpMULTIDEREF_DELETE DELETE), # deref is actually delete
+);
+
+
+
+addbits('avhvswitch', '0..1' => { });
+
+addbits('argelem',
+ '1..2' => {
+ mask_def => 'OPpARGELEM_MASK',
+ enum => [ qw(
+ 0 OPpARGELEM_SV SV
+ 1 OPpARGELEM_AV AV
+ 2 OPpARGELEM_HV HV
+ )],
+ },
+);
+
+
1;
# ex: set ts=8 sts=4 sw=4 et:
https://perl5.git.perl.org / perl5.git / blobdiff