[Transformation] Change hls synth resource estimation to handle nodes that have no synthesis report

src/finn/analysis/fpgadataflow/hls_synth_res_estimation.py

@@ -25,7 +25,7 @@
 # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
+import warnings
 import os
 import xml.etree.ElementTree as ET
 
@@ -50,9 +50,16 @@ def hls_synth_res_estimation(model):
                 inst = registry.custom_op[op_type](node)
                 code_gen_dir = inst.get_nodeattr("code_gen_dir_ipgen")
                 if code_gen_dir == "":
-                    raise Exception(
-                        """Please run "CodeGen_ipgen" transformation and
-                            "HLSSynth_IPGen" first to generate the report files"""
+                    res_dict[node.name] = dict()
+                    res_dict[node.name]["BRAM_18K"] = 0
+                    res_dict[node.name]["FF"] = 0
+                    res_dict[node.name]["LUT"] = 0
+                    res_dict[node.name]["DSP48E"] = 0
+                    res_dict[node.name]["URAM"] = 0
+                    warnings.warn(
+                        """Could not find report files, values will be set to zero
+                        for this node. Please run "CodeGen_ipgen" transformation and
+                        "HLSSynth_IPGen" first to generate the report files"""
                     )
                 else:
                     xmlfile = "{}/project_{}/sol1/syn/report/{}_csynth.xml".format(
@@ -67,9 +74,16 @@ def hls_synth_res_estimation(model):
                             for child in item:
                                 res_dict[node.name][child.tag] = child.text
                     else:
-                        raise Exception(
-                            """Please run "HLSSynth_IPGen" first
-                                to generate the report files"""
+                        res_dict[node.name] = dict()
+                        res_dict[node.name]["BRAM_18K"] = 0
+                        res_dict[node.name]["FF"] = 0
+                        res_dict[node.name]["LUT"] = 0
+                        res_dict[node.name]["DSP48E"] = 0
+                        res_dict[node.name]["URAM"] = 0
+                        warnings.warn(
+                            """Could not find report files, values will be set to zero
+                            for this node. Please run "HLSSynth_IPGen" first
+                            to generate the report files"""
                         )
 
     return res_dict