From f079daa42d09c278b2246034eb32420b4f634755 Mon Sep 17 00:00:00 2001
From: Jakub Doka <jakub.doka2@gmail.com>
Date: Mon, 11 Nov 2024 23:33:36 +0100
Subject: [PATCH] removing redundant loop phys

---
 lang/src/son.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lang/src/son.rs b/lang/src/son.rs
index 1d1d7bc2..756f224c 100644
--- a/lang/src/son.rs
+++ b/lang/src/son.rs
@@ -1043,6 +1043,10 @@ impl Nodes {
             K::Phi => {
                 let &[ctrl, lhs, rhs] = self[target].inputs.as_slice() else { unreachable!() };
 
+                if rhs == target {
+                    return Some(lhs);
+                }
+
                 if lhs == rhs {
                     return Some(lhs);
                 }