Various slangpy fixes. (#3227)

* Make dynamic cast transparent through `IRAttributedType`.

* Add [CUDAXxx] variant of attributes.

* Support marshaling of vector types.

* Wrap cuda kernels in `extern "C"` block.

---------

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

1 files changed, 1 insertions, 1 deletions

diff --git a/source/slang/slang-ir-validate.cpp b/source/slang/slang-ir-validate.cpp
index 2973e1ee5..af793bb54 100644
--- a/source/slang/slang-ir-validate.cpp
+++ b/source/slang/slang-ir-validate.cpp
@@ -80,7 +80,7 @@ namespace Slang
                 validate(context, state <= kState_AfterDecoration, child, "decorations must come before other child instructions");
                 state = kState_AfterDecoration;
             }
-            else if( as<IRParam>(child) )
+            else if( as<IRParam, IRDynamicCastBehavior::NoUnwrap>(child) )
             {
                 validate(context, state <= kState_AfterParam, child, "parameters must come before ordinary instructions");
                 state = kState_AfterParam;