Fix `IRVar` hoisting when its already in the right block. (#6626)

Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/source/slang/slang-ir-util.cpp b/source/slang/slang-ir-util.cpp
index 4aef7e7ba..58bb7aaf2 100644
--- a/source/slang/slang-ir-util.cpp
+++ b/source/slang/slang-ir-util.cpp
@@ -2162,7 +2162,9 @@ void legalizeDefUse(IRGlobalValueWithCode* func)
             {
                 // If inst is an var, this is easy, we just move it to the
                 // common dominator.
-                var->insertBefore(commonDominator->getTerminator());
+                if (var->getParent() != commonDominator)
+                    var->insertBefore(commonDominator->getTerminator());
+
                 if (shouldInitializeVar)
                 {
                     IRBuilder builder(func);