Bugfix: compiler will run forever to eliminate dead code (#2809)

* Add a test case that the compile will run forever

* Fix.

* fix.

---------

Co-authored-by: Lifan Wu <lifanw@nvidia.com>
Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/source/slang/slang-ir.cpp b/source/slang/slang-ir.cpp
index 92da981ad..dd3034da1 100644
--- a/source/slang/slang-ir.cpp
+++ b/source/slang/slang-ir.cpp
@@ -6889,6 +6889,8 @@ namespace Slang
         SLANG_ASSERT(other);
         if (other->getPrevInst() == this)
             return;
+        if (other == this)
+            return;
         _insertAt(other->getPrevInst(), other, other->getParent());
     }