From 2e76c925ce0f1271f5604443b17d1786e94a9055 Mon Sep 17 00:00:00 2001
From: Kyle Cripps <kyle@pensando.io>
Date: Fri, 12 Jul 2024 22:21:37 -0700
Subject: [PATCH] Short-circuit when parents are equal

Signed-off-by: Kyle Cripps <kyle@pensando.io>
---
 frontends/p4/def_use.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/frontends/p4/def_use.h b/frontends/p4/def_use.h
index 0800e09185..4343c2a153 100644
--- a/frontends/p4/def_use.h
+++ b/frontends/p4/def_use.h
@@ -41,8 +41,9 @@ struct loc_t {
     const loc_t *parent;
     bool operator==(const loc_t &a) const {
         if (node != a.node) return false;
-        if (parent && a.parent) return *parent == *a.parent;
-        return parent == a.parent;
+        if (parent == a.parent) return true;
+        if (!parent || !a.parent) return false;
+        return *parent == *a.parent;
     }
     std::size_t hash() const;
 };