Onnx format conversion to kmodel format bug

[meimei-123]

Describe the bug
In my execution:
compiler.import_onnx(model_content, import_options)
Encountered an error:
Process terminated. Assertion Failed

So I checked the model structure and annotated it line by line from back to front
Once x=self.fc6 (x) is commented out, it can be run. self.fc6=nn Linear (3072, 192), in ONNX format, is a Gemm operator.
I checked the list of onnx operators supported by nncase and found that there is Gemm.

To Reproduce
Command line or scripts to reproduce the behavior:

Expected behavior
I want to convert the pytorch model into a kmodel model, with the following model structure:

Origin model and code
model：

class Mymodel(nn.Module):
    def __init__(self, C=1024, m=0.2, s=30, n_class=2):
        super(Mymodel, self).__init__()

        self.conv1 = nn.Conv1d(80, C, kernel_size=5, stride=1, padding=2)
        self.relu = nn.ReLU()
        self.bn1 = nn.BatchNorm1d(C)
        self.layer1 = Bottle2neck(C, C, kernel_size=3, dilation=2, scale=8)
        self.layer2 = Bottle2neck(C, C, kernel_size=3, dilation=3, scale=8)
        self.layer3 = Bottle2neck(C, C, kernel_size=3, dilation=4, scale=8)
        # I fixed the shape of the output from MFA layer, that is close to the setting from ECAPA paper.
        self.layer4 = nn.Conv1d(3 * C, 1536, kernel_size=1)
        self.attention = nn.Sequential(
            nn.Conv1d(4608, 256, kernel_size=1),
            nn.ReLU(),
            nn.BatchNorm1d(256),
            nn.Tanh(),  # I add this layer
            nn.Conv1d(256, 1536, kernel_size=1),
            nn.Softmax(dim=2),
        )
        self.bn5 = nn.BatchNorm1d(3072)
        self.fc6 = nn.Linear(3072, 192)
        self.bn6 = nn.BatchNorm1d(192)

    def forward(self, x):
        x = self.conv1(x)
        x = self.relu(x)
        x = self.bn1(x)

        x1 = self.layer1(x)
        x2 = self.layer2(x + x1)
        x3 = self.layer3(x + x1 + x2)

        x = self.layer4(torch.cat((x1, x2, x3), dim=1))
        x = self.relu(x)

        t = x.size()[-1]

        global_x = torch.cat((x, torch.mean(x, dim=2, keepdim=True).repeat(1, 1, t),
                              torch.sqrt(torch.var(x, dim=2, keepdim=True).clamp(min=1e-4)).repeat(1, 1, t)), dim=1)

        w = self.attention(global_x)

        mu = torch.sum(x * w, dim=2)
        sg = torch.sqrt((torch.sum((x ** 2) * w, dim=2) - mu ** 2).clamp(min=1e-4))

        x = torch.cat((mu, sg), 1)
        x = self.bn5(x)
        x = self.fc6(x) # This is where the error occurred，after I annotate the code here and after, it will work fine
        x = self.bn6(x)
        return x

code：

    input_shape = [5, 80, 626] # The input data is a mel spectrogram converted from wav    
    dump_dir = 'tmp/export_onnx'
    if not os.path.exists(dump_dir):
        os.makedirs(dump_dir)

    # onnx simplify
    model_file = onnx_simplify(args.model, dump_dir)

    # compile_options
    compile_options = nncase.CompileOptions()
    compile_options.target = args.target
    compile_options.preprocess = False # 
    compile_options.swapRB = False
    compile_options.dump_ir = True # 是否输出ir
    compile_options.dump_asm = True # 是否输出汇编
    compile_options.dump_dir = dump_dir # 输出目录

    # compiler
    compiler = nncase.Compiler(compile_options)

    # import
    model_content = read_model_file(model_file)
    import_options = nncase.ImportOptions()
    compiler.import_onnx(model_content, import_options)

    # ptq_options
    ptq_options = nncase.PTQTensorOptions()
    ptq_options.samples_count = 6
    ptq_options.set_tensor_data(generate_data(input_shape, ptq_options.samples_count, args.dataset))
    compiler.use_ptq(ptq_options)

Environment (please complete the following information):

• OS: [Win11 WSL2 Ubuntu20.04]
• nncase version :nncase 2.8.1, nncase kpu 2.8.1
• DL Framework :pytorch 2.0.1
• other: Python 3.8.0, nncase 2.8.1, nncase kpu 2.8.1, numpy=1.19.5, onnx1.9.0, onnx simplier 0.3.6

[curioyang]

@meimei-123 upload onnx model file.

[meimei-123]

mymodel_256.txt

Github does not support ONNX format files, so I changed its suffix to. txt