Various fixes for autodiff and slangpy. (#2876)

* Various fixes for autodiff and slangpy.

* Fix cuda code gen for `select`.

* Fix getBuildTagString().

* Fix.

---------

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

1 files changed, 11 insertions, 0 deletions

diff --git a/source/slang/slang-emit-cpp.cpp b/source/slang/slang-emit-cpp.cpp
index df6ab4901..49edec92b 100644
--- a/source/slang/slang-emit-cpp.cpp
+++ b/source/slang/slang-emit-cpp.cpp
@@ -1615,6 +1615,17 @@ bool CPPSourceEmitter::tryEmitInstExprImpl(IRInst* inst, const EmitOpInfo& inOut
             m_writer->emit(")");
             return true;
         }
+        case kIROp_Select:
+        {
+            m_writer->emit("_slang_select(");
+            emitOperand(inst->getOperand(0), getInfo(EmitOp::General));
+            m_writer->emit(", ");
+            emitOperand(inst->getOperand(1), getInfo(EmitOp::General));
+            m_writer->emit(",");
+            emitOperand(inst->getOperand(2), getInfo(EmitOp::General));
+            m_writer->emit(")");
+            return true;
+        }
     }
 }