Move aiecc.py implementation to library

[fifield]

This allows access to aiecc from other python. It also removes the AIE_ENABLE_BINDINGS_PYTHON flag (it's always on).

for example,

>>> import aie.compiler.aiecc.main
>>> aie.compiler.aiecc.cl_arguments.parse_args(['-h'])
usage: aiecc [-h] [--sysroot sysroot] [--tmpdir tmpdir] [-v] [--vectorize] [--xbridge] [--no-xbridge] [--aiesim] [--no-aiesim] [--xchesscc] [--no-xchesscc]
             [--peano PEANO_INSTALL_DIR] [--compile] [--no-compile] [--host-target HOST_TARGET] [--aie-target AIE_TARGET] [--compile-host] [--no-compile-host] [--link]
             [--no-link] [--aie-generate-xaiev2] [--aie-generate-xaie] [-j NTHREADS] [--profile] [--unified] [--no-unified] [-n] [--progress]
             file ...

positional arguments:
  file                  MLIR file to compile
  arm_args              arguments for ARM compiler

optional arguments:
  -h, --help            show this help message and exit
  --sysroot sysroot     sysroot for cross-compilation
  --tmpdir tmpdir       directory used for temporary file storage
  -v                    Trace commands as they are executed
  --vectorize           Enable MLIR vectorization
  --xbridge             Link using xbridge
  --no-xbridge          Link using peano
  --aiesim              Generate aiesim Work folder
  --no-aiesim           Do no generate aiesim Work folder
  --xchesscc            Compile using xchesscc
  --no-xchesscc         Compile using peano
  --peano PEANO_INSTALL_DIR
                        Root directory where peano compiler is installed
  --compile             Enable compiling of AIE code
  --no-compile          Disable compiling of AIE code
  --host-target HOST_TARGET
                        Target architecture of the host program
  --aie-target AIE_TARGET
                        Target architecture of the AIE program
  --compile-host        Enable compiling of the host program
  --no-compile-host     Disable compiling of the host program
  --link                Enable linking of AIE code
  --no-link             Disable linking of AIE code
  --aie-generate-xaiev2
                        Generate libxaie v2 drivers (default is v2)
  --aie-generate-xaie   Generate libxaie v1 drivers (default is v2)
  -j NTHREADS           Compile with max n-threads in the machine (default is 1). An argument of zero corresponds to the maximum number of threads on the machine.
  --profile             Profile commands to find the most expensive executions.
  --unified             Compile all cores together in a single process
  --no-unified          Compile cores independently in separate processes
  -n                    Disable actually executing any commands.
  --progress            Show progress visualization

[fifield]

This also adds a aie.compiler.aiecc.configure.install_path() function to replace the ad-hoc use of os.path.realpath(__file__)) in aiecc to find the build or install location. os.path.realpath(__file__)) stopped working when aiecc/main.py was moved to the python library because the python files are soft links in the build area which means that during testing os.path.realpath(__file__)) gives a location in the source tree instead of in the build tree which results in failing tests. The install_path function lives in configure.py which is a generated file living in the build tree so it doesn't suffer the same problem.

[stephenneuendorffer]

I'm a little nervous about python being a hard dependency here. MLIR practice has been for that to be optional, if only because getting it to build has lots of pitfalls.

[stephenneuendorffer]

I guess one advantage of requiring python bindings is that aiecc.py could use them to walk the IR, rather than relying on aie-translate in a few places to extract information.

[keryell]

Status of this PR?