From a16acbaf594cd194c47f62d8576015c428f5c7b4 Mon Sep 17 00:00:00 2001
From: Uraniumm <74158325+Uraniumm@users.noreply.github.com>
Date: Mon, 8 Aug 2022 02:02:25 -0400
Subject: [PATCH] add nullptr check to mitigate crashes

wip for reach untracked tags build fixes
---
 src/xenia/cpu/compiler/passes/simplification_pass.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/xenia/cpu/compiler/passes/simplification_pass.cc b/src/xenia/cpu/compiler/passes/simplification_pass.cc
index 1b84e417c..fc952104e 100644
--- a/src/xenia/cpu/compiler/passes/simplification_pass.cc
+++ b/src/xenia/cpu/compiler/passes/simplification_pass.cc
@@ -795,7 +795,10 @@ bool SimplificationPass::CheckScalarConstCmp(hir::Instr* i,
 
   if (var_definition) {
     var_definition = var_definition->GetDestDefSkipAssigns();
-    def_opcode = var_definition->opcode->num;
+    if (var_definition != NULL)
+    {
+      def_opcode = var_definition->opcode->num;
+    }
   }
   // x == 0 -> !x
   if (cmpop == OPCODE_COMPARE_EQ && constant_unpacked == 0) {