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-peephole.cpp b/source/slang/slang-ir-peephole.cpp
index f6e8a3458..d344590b1 100644
--- a/source/slang/slang-ir-peephole.cpp
+++ b/source/slang/slang-ir-peephole.cpp
@@ -776,7 +776,7 @@ struct PeepholeContext : InstPassBase
                     break;
                 UInt paramIndex = 0;
                 auto prevParam = inst->getPrevInst();
-                while (as<IRParam>(prevParam))
+                while (as<IRParam, IRDynamicCastBehavior::NoUnwrap>(prevParam))
                 {
                     prevParam = prevParam->getPrevInst();
                     paramIndex++;