Tuple swizzling, concat, comparison and `countof`. (#4856)

* Tuple swizzling and element access.

* Update proposal status.

* Cleanup.

* Fix merrge error.

* Address review.

1 files changed, 11 insertions, 0 deletions

diff --git a/source/slang/slang-ir-inline.cpp b/source/slang/slang-ir-inline.cpp
index 0d5cb1c70..9b2b59cd9 100644
--- a/source/slang/slang-ir-inline.cpp
+++ b/source/slang/slang-ir-inline.cpp
@@ -277,6 +277,17 @@ struct InliningPassBase
         if(!isDefinition(calleeFunc))
             return false;
 
+        // We cannot inline a call inside an `IRExpand`.
+        // Because this will make the cfg inside the `IRExpand` too complex,
+        // and our expand specialization logic isn't general enough to deal
+        // with that yet.
+        for (auto parent = call->getParent(); parent; parent = parent->getParent())
+        {
+            if (as<IRExpand>(parent))
+                return false;
+            if (as<IRGlobalValueWithCode>(parent))
+                break;
+        }
         return true;
     }