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-rwxr-xr-xerts/emulator/utils/beam_makeops75
1 files changed, 60 insertions, 15 deletions
diff --git a/erts/emulator/utils/beam_makeops b/erts/emulator/utils/beam_makeops
index d7791d23fa..02227bbdfd 100755
--- a/erts/emulator/utils/beam_makeops
+++ b/erts/emulator/utils/beam_makeops
@@ -131,7 +131,10 @@ my $loader_types = "nprvlqo";
my $genop_types = $compiler_types . $loader_types;
#
-# Defines the argument types and their loaded size assuming no packing.
+# Define the operand types and their loaded size assuming no packing.
+#
+# Those are the types that can be used in the definition of a specific
+# instruction.
#
my %arg_size = ('r' => 0, # x(0) - x register zero
'x' => 1, # x(N), N > 0 - x register
@@ -154,12 +157,35 @@ my %arg_size = ('r' => 0, # x(0) - x register zero
'A' => 1, # arity value
'P' => 1, # byte offset into tuple or stack
'Q' => 1, # like 'P', but packable
- 'h' => 1, # character
+ 'h' => 1, # character (not used)
'l' => 1, # float reg
'q' => 1, # literal term
);
#
+# Define the types that may be used in a transformation rule.
+#
+# %pattern_type defines the types that may be used in a pattern
+# on the left side.
+#
+# %construction_type defines the types that may be used when
+# constructing a new instruction on the right side (a subset of
+# the pattern types that are possible to construct).
+#
+my $pattern_types = "acdfjilnopqsuxy";
+my %pattern_type;
+@pattern_type{split("", $pattern_types)} = (1) x length($pattern_types);
+
+my %construction_type;
+foreach my $type (keys %pattern_type) {
+ $construction_type{$type} = 1
+ if index($genop_types, $type) >= 0;
+}
+foreach my $makes_no_sense ('f', 'j', 'o', 'p', 'q') {
+ delete $construction_type{$makes_no_sense};
+}
+
+#
# Generate bits.
#
my %type_bit;
@@ -194,7 +220,8 @@ sub define_type_bit {
define_type_bit('S', $type_bit{'d'});
define_type_bit('j', $type_bit{'f'} | $type_bit{'p'});
- # Aliases (for matching purposes).
+ # Aliases of 'u'. Those specify how to load the operand and
+ # what kind of packing can be done.
define_type_bit('t', $type_bit{'u'});
define_type_bit('I', $type_bit{'u'});
define_type_bit('W', $type_bit{'u'});
@@ -2156,12 +2183,19 @@ sub tr_parse_op {
if (/^([a-z*]+)(.*)/) {
$type = $1;
$_ = $2;
+ error("$type: only a single type is allowed on right side of transformations")
+ if not $src and length($type) > 1;
foreach (split('', $type)) {
- error("bad type in $op")
- unless defined $type_bit{$_} or $type eq '*';
- $_ eq 'r' and
- error("$op: 'r' is not allowed in transformations")
- }
+ next if $src and $type eq '*';
+ error("$op: not a type")
+ unless defined $type_bit{$_};
+ error("$op: the type '$_' is not allowed in transformations")
+ unless defined $pattern_type{$_};
+ if (not $src) {
+ error("$op: type '$_' is not allowed on the right side of transformations")
+ unless defined $construction_type{$_};
+ }
+ }
}
# Get an optional condition. (In source.)
@@ -2194,10 +2228,18 @@ sub tr_parse_op {
}
# Get an optional value. (In destination.)
- $type_val = $type eq 'x' ? 1023 : 0;
+ if ($type eq 'x') {
+ $type_val = 1023;
+ } elsif ($type eq 'a') {
+ $type_val = 'am_Empty';
+ } else {
+ $type_val = 0;
+ }
if (/^=(.*)/) {
- error("value not allowed in source: $op")
+ error("$op: value not allowed in source")
if $src;
+ error("$op: the type 'n' must not be given a value")
+ if $type eq 'n';
$type_val = $1;
$_ = '';
}
@@ -2207,13 +2249,16 @@ sub tr_parse_op {
error("garbage '$_' after operand: $op")
unless /^\s*$/;
- # Test that destination has no conditions.
+ # Check the conditions.
- unless ($src) {
- error("condition not allowed in destination: $op")
+ if ($src) {
+ error("$op: the type '$type' is not allowed to be compared with a literal value")
+ if $cond and not $construction_type{$type};
+ } else {
+ error("$op: condition not allowed in destination")
if $cond;
- error("variable name and type cannot be combined in destination: $op")
- if $var && $type;
+ error("$op: variable name and type cannot be combined in destination")
+ if $var and $type;
}
($var,$type,$type_val,$cond,$cond_val);