From bf39b184ca8aabcc51dc6ea4eee046c69b278710 Mon Sep 17 00:00:00 2001
From: Roland Westrelin <roland@openjdk.org>
Date: Tue, 4 Oct 2022 08:08:38 +0000
Subject: [PATCH] 8288302: Shenandoah: SIGSEGV in vm maybe related to jit
 compiling xerces

Reviewed-by: shade, thartmann
---
 src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp b/src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp
index 04674d99d56..ca08f1ab698 100644
--- a/src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp
+++ b/src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp
@@ -1080,7 +1080,8 @@ Node* ShenandoahBarrierSetC2::ideal_node(PhaseGVN* phase, Node* n, bool can_resh
   } else if (can_reshape &&
              n->Opcode() == Op_If &&
              ShenandoahBarrierC2Support::is_heap_stable_test(n) &&
-             n->in(0) != NULL) {
+             n->in(0) != NULL &&
+             n->outcnt() == 2) {
     Node* dom = n->in(0);
     Node* prev_dom = n;
     int op = n->Opcode();