Fix scalar swizzle write. (#2801)

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

1 files changed, 5 insertions, 0 deletions

diff --git a/source/slang/slang-ir.cpp b/source/slang/slang-ir.cpp
index e624ef1fd..92da981ad 100644
--- a/source/slang/slang-ir.cpp
+++ b/source/slang/slang-ir.cpp
@@ -4690,6 +4690,11 @@ namespace Slang
         {
             type = getVectorType(matrixType->getElementType(), matrixType->getColumnCount());
         }
+        else if (auto basicType = as<IRBasicType>(basePtrType->getValueType()))
+        {
+            // HLSL support things like float.x, in which case we just return the base pointer.
+            return basePtr;
+        }
         SLANG_RELEASE_ASSERT(type);
         auto inst = createInst<IRGetElementPtr>(
             this,