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-rwxr-xr-xerts/emulator/utils/beam_makeops21
1 files changed, 15 insertions, 6 deletions
diff --git a/erts/emulator/utils/beam_makeops b/erts/emulator/utils/beam_makeops
index c2fb101846..8a5b8047eb 100755
--- a/erts/emulator/utils/beam_makeops
+++ b/erts/emulator/utils/beam_makeops
@@ -1301,13 +1301,22 @@ sub tr_gen_from {
my($var, $type, $type_val, $cond, $val) = @$op;
if ($type ne '' && $type ne '*') {
- my($types) = '';
- my($type_mask) = 0;
- foreach (split('', $type)) {
- $types .= "$_ ";
- $type_mask |= $type_bit{$_};
+ #
+ # The is_bif, is_not_bif, and is_func instructions have
+ # their own built-in type test and don't need to
+ # be guarded with a type test instruction.
+ #
+ unless ($cond eq 'is_bif' or
+ $cond eq 'is_not_bif' or
+ $cond eq 'is_func') {
+ my($types) = '';
+ my($type_mask) = 0;
+ foreach (split('', $type)) {
+ $types .= "$_ ";
+ $type_mask |= $type_bit{$_};
+ }
+ push(@code, &make_op($types, 'is_type', $type_mask));
}
- push(@code, &make_op($types, 'is_type', $type_mask));
}
if ($cond eq 'is_func') {