From 2bfde345291a6f7b07865abbd0a48ec5bf4a4b61 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Mon, 18 Mar 2024 17:59:08 -0700
Subject: Check cyclic types after specialization. (#3791)

---
 source/slang/slang-emit.cpp    |  2 ++
 tests/bugs/cyclic-type-2.slang | 24 ++++++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 tests/bugs/cyclic-type-2.slang

diff --git a/source/slang/slang-emit.cpp b/source/slang/slang-emit.cpp
index 649858e51..70dddb4f6 100644
--- a/source/slang/slang-emit.cpp
+++ b/source/slang/slang-emit.cpp
@@ -14,6 +14,7 @@
 #include "slang-ir-composite-reg-to-mem.h"
 #include "slang-ir-dce.h"
 #include "slang-ir-diff-call.h"
+#include "slang-ir-check-recursive-type.h"
 #include "slang-ir-autodiff.h"
 #include "slang-ir-defunctionalization.h"
 #include "slang-ir-dll-export.h"
@@ -475,6 +476,7 @@ Result linkAndOptimizeIR(
         break;
     }
 
+    checkForRecursiveTypes(irModule, sink);
     if (sink->getErrorCount() != 0)
         return SLANG_FAIL;
 
diff --git a/tests/bugs/cyclic-type-2.slang b/tests/bugs/cyclic-type-2.slang
new file mode 100644
index 000000000..b7e2aa448
--- /dev/null
+++ b/tests/bugs/cyclic-type-2.slang
@@ -0,0 +1,24 @@
+
+//TEST:SIMPLE(filecheck=CHECK):-target spirv -emit-spirv-directly
+
+// CHECK: error 41001:
+
+interface IFoo {}
+struct TA<T:IFoo> : IFoo
+{
+    TB<T> tb;
+}
+
+struct TB<T:IFoo>
+{
+    TA<T> ta[2];
+}
+
+struct TC : IFoo {}
+
+[numthreads(1,1,1)]
+void main()
+{
+    TA<TC> ta;
+    ta.tb.ta[0] = ta;
+}
\ No newline at end of file
-- 
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