[SYCLomatic] Refine migration of CuDNN types (#533)

* Add bool and operator= for some dnn types

* add const to bool conversion

Author: jzc

clang/runtime/dpct-rt/include/dnnl_utils.hpp.inc

@@ -198,6 +198,15 @@ public:
     }
     return result;
   }
+
+  operator bool() const {
+    return bool(_desc);
+  }
+
+  memory_desc_ext &operator=(std::nullptr_t) {
+    _desc.reset(nullptr);
+    return *this;
+  }
 };
 // DPCT_LABEL_END
 
@@ -653,6 +662,16 @@ public:
                             _strides[i - 2];
     }
   }
+
+  convolution_desc &operator=(std::nullptr_t) {
+    return *this = convolution_desc();
+  }
+
+  operator bool() const {
+    return _strides.size() == 0
+      && _dilates.size() == 0
+      && _paddings.size() == 0;
+  }
 };
 // DPCT_LABEL_END
 
@@ -2110,6 +2129,16 @@ public:
       size_t workspace_size, void *workspace);
 // DPCT_LABEL_END
 
+  operator bool() const {
+    return bool(_eng) && bool(_s) && bool(_q);
+  }
+
+  engine_ext &operator=(std::nullptr_t) {
+    _eng.reset(nullptr);
+    _s.reset(nullptr);
+    _q = nullptr;
+    return *this;
+  }
 // DPCT_LABEL_BEGIN|engine_ext_1|dpct::dnnl
 // DPCT_DEPENDENCY_BEGIN
 // DnnlUtils|engine_ext
@@ -4745,4 +4774,4 @@ sycl::event engine_ext::async_rnn_backward(
 } // namespace dnnl
 } // namespace dpct
 
-#endif // __DPCT_DNNL_UTILS_HPP__
+#endif // __DPCT_DNNL_UTILS_HPP__

clang/test/dpct/helper_files_ref/include/dnnl_utils.hpp

@@ -170,6 +170,15 @@ class memory_desc_ext {
     }
     return result;
   }
+
+  operator bool() const {
+    return bool(_desc);
+  }
+
+  memory_desc_ext &operator=(std::nullptr_t) {
+    _desc.reset(nullptr);
+    return *this;
+  }
 };
 
 /// A class holding description for an activation operation.
@@ -585,6 +594,16 @@ class convolution_desc {
                             _strides[i - 2];
     }
   }
+
+  convolution_desc &operator=(std::nullptr_t) {
+    return *this = convolution_desc();
+  }
+
+  operator bool() const {
+    return _strides.size() == 0
+      && _dilates.size() == 0
+      && _paddings.size() == 0;
+  }
 };
 
 /// An enum class representing rnn mode.
@@ -1757,6 +1776,16 @@ class engine_ext {
       void *weight, void *diff_weight, size_t scratchpad_size, void *scratchpad,
       size_t workspace_size, void *workspace);
 
+  operator bool() const {
+    return bool(_eng) && bool(_s) && bool(_q);
+  }
+
+  engine_ext &operator=(std::nullptr_t) {
+    _eng.reset(nullptr);
+    _s.reset(nullptr);
+    _q = nullptr;
+    return *this;
+  }
 };
 
 inline
@@ -4186,4 +4215,4 @@ sycl::event engine_ext::async_rnn_backward(
 } // namespace dnnl
 } // namespace dpct
 
-#endif // __DPCT_DNNL_UTILS_HPP__
+#endif // __DPCT_DNNL_UTILS_HPP__