GPT-2 torch to linalg

[AmosLewis]

No description provided.

[AmosLewis]

Raised error when Import the TorchScript module to MLIR

  File "torch-mlir/build/tools/torch-mlir/python_packages/torch_mlir/torch_mlir/__init__.py", line 233, in compile
        mb.import_module(scripted._c, class_annotator, import_options)
    raise Exception(f"""
Exception: 
PyTorch TorchScript module -> torch-mlir Object Graph IR import failed with:
### Importer C++ Exception:
Unsupported import tensor type: (1,1,.,.)
[ CPUByteType{1,1,1024,1024} ]

[AmosLewis]

Raised error when Import the TorchScript module to MLIR

  File "torch-mlir/build/tools/torch-mlir/python_packages/torch_mlir/torch_mlir/__init__.py", line 233, in compile
        mb.import_module(scripted._c, class_annotator, import_options)
    raise Exception(f"""
Exception: 
PyTorch TorchScript module -> torch-mlir Object Graph IR import failed with:
### Importer C++ Exception:
Unsupported import tensor type: (1,1,.,.)
[ CPUByteType{1,1,1024,1024} ]

This bug has been fixed by cherry-pick https://github.com/llvm/torch-mlir/issues/1383. But then it will generate a new bug for the pass lowering:

Traceback (most recent call last):
  File "/home/chi/src/ubuntu20/shark/SHARK/tank/gpt2_torch/gpt2.py", line 81, in <module>
    module = torch_mlir.compile(
  File "/home/chi/src/ubuntu20/shark/torch-mlir/build/tools/torch-mlir/python_packages/torch_mlir/torch_mlir/__init__.py", line 247, in compile
    run_pipeline_with_repro_report(
  File "/home/chi/src/ubuntu20/shark/torch-mlir/build/tools/torch-mlir/python_packages/torch_mlir/torch_mlir/compiler_utils.py", line 73, in run_pipeline_with_repro_report
    raise TorchMlirCompilerError(trimmed_message) from None
torch_mlir.compiler_utils.TorchMlirCompilerError: Lowering TorchScript IR -> Torch Backend IR failed with the following diagnostics:
error: 'func.call' op operand type mismatch: expected operand type '!torch.float', but provided '!torch.number' for operand number 1
note: see current operation: %1487 = "func.call"(%1482, %182, %1483, %1484, %1485, %1486) {callee = @__torch_mlir_shape_fn.aten.arange.start} : (!torch.float, !torch.number, !torch.optional<int>, !torch.optional<int>, !torch.optional<Device>, !torch.optional<bool>) -> !torch.list<int>


Error can be reproduced with:
$ torch-mlir-opt -pass-pipeline='torchscript-module-to-torch-backend-pipeline{backend-legal-ops=torch.aten.flatten.using_ints}' /tmp/HfMaskedLM.mlir
Add '-mlir-print-ir-after-all -mlir-disable-threading' to get the IR dump for debugging purpose.

[AmosLewis]

The '!torch.float', but provided '!torch.number' bug could be fixed by use the make_fx. @Shukla-Gaurav has fixed this bug. Next step is to fix the view op. It might be fixed by llvm/torch-mlir#1353

torch_mlir.compiler_utils.TorchMlirCompilerError: Lowering Torch Backend IR -> Linalg-on-Tensors Backend IR failed with the following diagnostics:
error: failed to legalize operation 'torch.aten.view' that was explicitly marked illegal
note: see current operation: %202 = "torch.aten.view"(%201, %184) : (!torch.vtensor<[1,?],si64>, !torch.list<int>) -> !torch.vtensor<[?,5],si64>


Error can be reproduced with:
$ torch-mlir-opt -pass-pipeline='torch-backend-to-linalg-on-tensors-backend-pipeline' /tmp/_lambda.mlir
Add '-mlir-print-ir-after-all -mlir-disable-threading' to get the IR dump for debugging purpose.

[AmosLewis]

The '!torch.float', but provided '!torch.number' bug could be fixed by use the make_fx. @Shukla-Gaurav has fixed this bug. Next step is to fix the view op. It might be fixed by llvm/torch-mlir#1353

torch_mlir.compiler_utils.TorchMlirCompilerError: Lowering Torch Backend IR -> Linalg-on-Tensors Backend IR failed with the following diagnostics:
error: failed to legalize operation 'torch.aten.view' that was explicitly marked illegal
note: see current operation: %202 = "torch.aten.view"(%201, %184) : (!torch.vtensor<[1,?],si64>, !torch.list<int>) -> !torch.vtensor<[?,5],si64>


Error can be reproduced with:
$ torch-mlir-opt -pass-pipeline='torch-backend-to-linalg-on-tensors-backend-pipeline' /tmp/_lambda.mlir
Add '-mlir-print-ir-after-all -mlir-disable-threading' to get the IR dump for debugging purpose.

The newest Alex Jakpin's patch should fix the view bug. llvm/torch-mlir#1353. If not, then try Shukla-Gaurav's old patch llvm/torch-mlir@18424b5

[AmosLewis]

Now GPT Torch to Linalg should be done.
We just need to wait for Byte bug patch PR llvm/torch-mlir#1384 and View Bug Patch PR llvm/torch-mlir#1353 to be merged in torch-mlir. Then eveything for linalg should be good. Here is tmp py patch for test https://gist.github.com/AmosLewis/d69134cec46de50083d7e50c980ee258

Here is the results compare with shark_inference

GPT2 Torch Golden OUTPUT:
tensor([[[ -31.8388,  -30.9854,  -34.4231,  ...,  -39.7515,  -38.6848,
           -32.3074],
         [ -99.2055,  -98.8202, -104.2251,  ..., -112.2020, -109.0224,
          -100.2584],
         [-115.6919, -116.9150, -119.1486,  ..., -124.9616, -123.2126,
          -116.6671],
         [-123.0994, -123.1445, -128.7349,  ..., -130.6248, -130.6557,
          -125.1285],
         [ -80.2680,  -81.8277,  -89.0646,  ...,  -94.5047,  -96.1721,
           -83.7583]]], grad_fn=<UnsafeViewBackward0>)
GPT2 Torch to Linalg SharkInference OUTPUT:
tensor([[[ -31.8388,  -30.9854,  -34.4230,  ...,  -39.7514,  -38.6848,
           -32.3073],
         [ -99.2055,  -98.8202, -104.2252,  ..., -112.2021, -109.0225,
          -100.2584],
         [-115.6919, -116.9149, -119.1486,  ..., -124.9616, -123.2126,
          -116.6672],
         [-123.0994, -123.1446, -128.7350,  ..., -130.6248, -130.6558,
          -125.1285],
         [ -80.2680,  -81.8276,  -89.0646,  ...,  -94.5047,  -96.1721,
           -83.7583]]])

[nithinsubbiah]

@AmosLewis Have we got all patches merged for GPT-2 lowering to Linalg. Can we close this issue?