Try integrating with QIREE

[tzunghanjuang]

Context:
Just for fun 🙂 .

Build XACC
Cmake command for Conda:

cmake .. -DXACC_BUILD_TESTS=TRUE -DXACC_BUILD_EXAMPLES=TRUE -DPython_EXECUTABLE:FILEPATH=/home/tzung-han.juang/.conda/envs/qiree/bin/python3.12 -DPython_EXECUTABLE=/home/tzung-han.juang/.conda/envs/qiree/bin/python3.12 -DPython_INCLUDE_DIR=/home/tzung-han.juang/.conda/envs/qiree/include/python3.12/ -DPython_LIBRARY=/home/tzung-han.juang/.conda/envs/qiree/lib/libpython3.12.so

Build QIREE:

cmake .. -DLLVM_DIR=/home/tzung-han.juang/Workspace/catalyst-qiree/mlir/llvm-project/build/lib/cmake/llvm

• QIREE requires MCJIT. We need to add MCJIT manully to LLVM (in llvm-project/mlir/lib/ExecutionEngine/CMakeLists.txt).
• Build LLVM with -DCMAKE_CXX_VISIBILITY_PRESET=Hidden

Issues:

Supported IR list:
https://github.com/ORNL-QCI/qiree/blob/aef64061406c904911178a3b621cc9318cb271bc/TODO.md

[erick-xanadu]

You may be interested in this branch: https://github.com/PennyLaneAI/catalyst/tree/eochoa/2024-03-25/backends very old and I went with a different approach for outlining kernels.