Disable LTC by default until upstream revert relands (llvm#1303)

* Disable LTC by default until upstream revert relands

Tracked with the WIP llvm#1292

* Disable LTC e2e tests temporarily

* Update setup.py

Disable LTC in setup.py temporarily until upstream is fixed.

.github/workflows/buildAndTest.yml

@@ -183,4 +183,5 @@ jobs:
       if: ${{ matrix.os-arch == 'ubuntu-x86_64' && matrix.llvm-build == 'in-tree' }}
       run: |
         export PYTHONPATH="$GITHUB_WORKSPACE/build/tools/torch-mlir/python_packages/torch_mlir"
-        python -m e2e_testing.torchscript.main --config=lazy_tensor_core -v
+        echo "LTC tests disabled temporarily. https://github.com/llvm/torch-mlir/pull/1292"
+        # python -m e2e_testing.torchscript.main --config=lazy_tensor_core -v

CMakeLists.txt

@@ -49,7 +49,7 @@ if(TORCH_MLIR_ENABLE_MHLO)
   endif()
 endif()
 
-option(TORCH_MLIR_ENABLE_LTC "Enables LTC backend" ON)
+option(TORCH_MLIR_ENABLE_LTC "Enables LTC backend" OFF)
 
 if(TORCH_MLIR_ENABLE_LTC)
     set(ENV{TORCH_MLIR_ENABLE_LTC} 1)

setup.py

@@ -81,7 +81,7 @@ def run(self):
                 f"-DCMAKE_VISIBILITY_INLINES_HIDDEN=ON",
                 f"-DCMAKE_C_VISIBILITY_PRESET=hidden",
                 f"-DCMAKE_CXX_VISIBILITY_PRESET=hidden",
-                f"-DTORCH_MLIR_ENABLE_LTC={'ON' if int(os.environ.get('TORCH_MLIR_ENABLE_LTC', 1)) else 'OFF'}",
+                f"-DTORCH_MLIR_ENABLE_LTC={'OFF' if int(os.environ.get('TORCH_MLIR_ENABLE_LTC', 1)) else 'OFF'}",
             ]
 
             os.makedirs(cmake_build_dir, exist_ok=True)