coffezhou opened a new issue, #17867:
URL: https://github.com/apache/tvm/issues/17867

   ### Expected behavior
   
   TVM should build the model correctly.
   
   ### Actual behavior
   
   When compiling the model, TVM crashes as follows:
   
   
![Image](https://github.com/user-attachments/assets/764cb7bf-3fb1-4021-a355-5dc969d5644a)
   
   ```c
   Traceback (most recent call last):
     File "/home/carla/Documents/test/test.py", line 189, in <module>
       main()
     File "/home/carla/Documents/test/test.py", line 178, in main
       check_correctness(onnx_model)
     File "/home/carla/Documents/test/test.py", line 126, in check_correctness
       ex = relax.build(tvm_model, target="llvm", relax_pipeline=relax_pipeline)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File "/home/carla/Documents/tvm/python/tvm/relax/vm_build.py", line 258, 
in build
       mod = _vmcodegen(builder, mod, exec_mode)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File "/home/carla/Documents/tvm/python/tvm/relax/vm_build.py", line 77, in 
_vmcodegen
       return _ffi_api.VMCodeGen(builder, mod)  # type:ignore
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File "tvm/_ffi/_cython/./packed_func.pxi", line 339, in 
tvm._ffi._cy3.core.PackedFuncBase.__call__
     File "tvm/_ffi/_cython/./packed_func.pxi", line 270, in 
tvm._ffi._cy3.core.FuncCall
     File "tvm/_ffi/_cython/./packed_func.pxi", line 259, in 
tvm._ffi._cy3.core.FuncCall3
     File "tvm/_ffi/_cython/./base.pxi", line 185, in 
tvm._ffi._cy3.core.CHECK_CALL
     File "/home/carla/Documents/tvm/python/tvm/_ffi/base.py", line 468, in 
raise_last_ffi_error
       raise py_err
   tvm._ffi.base.TVMError: Traceback (most recent call last):
     7: 
tvm::runtime::PackedFuncObj::Extractor<tvm::runtime::PackedFuncSubObj<tvm::runtime::TypedPackedFunc<tvm::IRModule
 (tvm::relax::ExecBuilder, tvm::IRModule)>::AssignTypedLambda<tvm::IRModule 
(*)(tvm::relax::ExecBuilder, tvm::IRModule)>(tvm::IRModule 
(*)(tvm::relax::ExecBuilder, tvm::IRModule), std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> >)::{lambda(tvm::runtime::TVMArgs 
const&, tvm::runtime::TVMRetValue*)#1}> >::Call(tvm::runtime::PackedFuncObj 
const*, tvm::runtime::TVMArgs, tvm::runtime::TVMRetValue*)
     6: tvm::relax::relax_vm::VMCodeGen(tvm::relax::ExecBuilder, tvm::IRModule)
     5: tvm::relax::relax_vm::CodeGenVM::Run(tvm::relax::ExecBuilder, 
tvm::IRModule)
     4: tvm::relax::relax_vm::CodeGenVM::Codegen(tvm::relax::Function const&)
     3: tvm::relax::ExprFunctor<tvm::runtime::relax_vm::Instruction::Arg 
(tvm::RelaxExpr const&)>::VisitExpr(tvm::RelaxExpr const&)
     2: tvm::relax::relax_vm::CodeGenVM::VisitExpr_(tvm::relax::SeqExprNode 
const*)
     1: tvm::relax::ExprFunctor<tvm::runtime::relax_vm::Instruction::Arg 
(tvm::RelaxExpr const&)>::VisitExpr(tvm::RelaxExpr const&)
     0: tvm::relax::relax_vm::CodeGenVM::VisitExpr_(tvm::relax::CallNode const*)
     File "/home/carla/Documents/tvm/src/relax/backend/vm/codegen_vm.cc", line 
156
   TVMError: CodeGenVM cannot handle this intrinsic now:
   Op(relax.concat)
   ```
   
   ### Environment
   
   OS: Ubuntu 20.04
   TVM: 0.21.dev0(c00f52a70)
   
   ### Steps to reproduce
   
   This bug can be reproduced by the following code with the model in the 
attachment. As shown in the code, the model can be executed by onnxruntime, 
which indicates that this is a valid model. It is strange that CodeGenVM cannot 
handle the concat operator.
   
   ```python
   import sys
   
   import numpy as np
   import onnx
   import onnxruntime
   
   import tvm
   from tvm import relax
   from tvm.relax.frontend.onnx import from_onnx
   
   import pickle
               
   def main():
       onnx_model = onnx.load("a317.onnx")
       
       with open("inputs.pkl", "rb") as fp:
           inputs = pickle.load(fp)
       
       try:
           ort_session = onnxruntime.InferenceSession(
               onnx_model.SerializeToString(), 
providers=["CPUExecutionProvider"]
           )
           ort_output = ort_session.run([], inputs)
       except Exception as e:
           print(e)
           sys.exit(1)
       
       tvm_model = from_onnx(onnx_model, keep_params_in_input=True)
       tvm_model = relax.transform.DecomposeOpsForInference()(tvm_model)
       tvm_model = relax.transform.LegalizeOps()(tvm_model)
   
       tvm_model, params = relax.frontend.detach_params(tvm_model)
           
       with tvm.transform.PassContext(opt_level=0):
           
           ex = relax.build(tvm_model, target="llvm")
   
   if __name__ == "__main__":
       main()
   ```
   
   
[testcase.zip](https://github.com/user-attachments/files/19830818/testcase.zip)
   
   ### Triage
   
   * needs-triage
   


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