Filter: Change linearization of branches in switch instruction

Most branching instructions (FI_CONDITION, FI_AND, FI_OR) linearize its
branches in a recursive way, while FI_SWITCH branches are linearized
from parser even before the switch instruction is allocated.

Change linearization of FI_SWITCH branches to make it similar to other
branching instructions. This also fixes an issue with constant
switch evaluation, where linearized branch is mistaken for
non-linearized during switch construction.

Thanks to Jiten Kumar Pathy for the bugreport.

1 files changed, 1 insertions, 0 deletions

diff --git a/filter/data.h b/filter/data.h
index 5edeaedb..700609e9 100644
--- a/filter/data.h
+++ b/filter/data.h
@@ -198,6 +198,7 @@ struct f_trie_walk_state
 struct f_tree *f_new_tree(void);
 struct f_tree *build_tree(struct f_tree *);
 const struct f_tree *find_tree(const struct f_tree *t, const struct f_val *val);
+const struct f_tree *find_tree_linear(const struct f_tree *t, const struct f_val *val);
 int same_tree(const struct f_tree *t0, const struct f_tree *t2);
 int tree_node_count(const struct f_tree *t);
 void tree_format(const struct f_tree *t, buffer *buf);