[HIPIFY][cuDNN] Add cudnnGetFilter4dDescriptor support

+ Update cudnn_convolution_forward test accordingly

docs/markdown/CUDNN_API_supported_by_HIP.md

@@ -293,7 +293,7 @@
 |`cudnnScaleTensor`                                         |`hipdnnScaleTensor`                              |
 |`cudnnCreateFilterDescriptor`                              |`hipdnnCreateFilterDescriptor`                   |
 |`cudnnSetFilter4dDescriptor`                               |`hipdnnSetFilter4dDescriptor`                    |
-|`cudnnGetFilter4dDescriptor`                               |                                                 |
+|`cudnnGetFilter4dDescriptor`                               |`hipdnnGetFilter4dDescriptor`                    |
 |`cudnnSetFilterNdDescriptor`                               |`hipdnnSetFilterNdDescriptor`                    |
 |`cudnnGetFilterNdDescriptor`                               |`hipdnnGetFilterNdDescriptor`                    |
 |`cudnnDestroyFilterDescriptor`                             |`hipdnnDestroyFilterDescriptor`                  |

hipify-clang/src/CUDA2HIP_DNN_API_functions.cpp

@@ -76,7 +76,7 @@ const std::map<llvm::StringRef, hipCounter> CUDA_DNN_FUNCTION_MAP{
   // cuDNN Filter functions
   {"cudnnCreateFilterDescriptor",                         {"hipdnnCreateFilterDescriptor",                         "", CONV_LIB_FUNC, API_DNN}},
   {"cudnnSetFilter4dDescriptor",                          {"hipdnnSetFilter4dDescriptor",                          "", CONV_LIB_FUNC, API_DNN}},
-  {"cudnnGetFilter4dDescriptor",                          {"hipdnnGetFilter4dDescriptor",                          "", CONV_LIB_FUNC, API_DNN, HIP_UNSUPPORTED}},
+  {"cudnnGetFilter4dDescriptor",                          {"hipdnnGetFilter4dDescriptor",                          "", CONV_LIB_FUNC, API_DNN}},
   {"cudnnSetFilterNdDescriptor",                          {"hipdnnSetFilterNdDescriptor",                          "", CONV_LIB_FUNC, API_DNN}},
   {"cudnnGetFilterNdDescriptor",                          {"hipdnnGetFilterNdDescriptor",                          "", CONV_LIB_FUNC, API_DNN}},
   {"cudnnDestroyFilterDescriptor",                        {"hipdnnDestroyFilterDescriptor",                        "", CONV_LIB_FUNC, API_DNN}},

tests/hipify-clang/unit_tests/libraries/cuDNN/cudnn_convolution_forward.cu

@@ -176,6 +176,19 @@ int main() {
         out_desc, CUDNN_TENSOR_NCHW, CUDNN_DATA_FLOAT,
         out_n, out_c, out_h, out_w));
 
+
+  cudnnDataType_t *dataType = nullptr;
+  cudnnTensorFormat_t *tensorFormat = nullptr;
+  int *p_filt_k = nullptr;
+  int *p_filt_c = nullptr;
+  int *p_filt_h = nullptr;
+  int *p_filt_w = nullptr;
+
+  // CHECK: CUDNN_CALL(hipdnnGetFilter4dDescriptor(
+  CUDNN_CALL(cudnnGetFilter4dDescriptor(
+    filt_desc, dataType, tensorFormat,
+    p_filt_k, p_filt_c, p_filt_h, p_filt_w));
+
   float *out_data;
   // CHECK: CUDA_CALL(hipMalloc(
   CUDA_CALL(cudaMalloc(