AMD AIE Plugin for IREE

This repository contains an early-phase IREE compiler and runtime plugin for targeting AMD NPUs with IREE.

Developer Setup

Strong recommendation: check the CI scripts @ .github/workflows - they do a fresh checkout and build on every commit and are written to be read by a non-CI expert.

Getting the repository

Either

# ssh
git clone --recursive git@github.com:nod-ai/iree-amd-aie.git
# https
git clone --recursive https://github.com/nod-ai/iree-amd-aie.git

or, if you want a faster checkout,

git \
  -c submodule."third_party/torch-mlir".update=none \
  -c submodule."third_party/stablehlo".update=none \
  -c submodule."third_party/XRT".update=none \
  clone \
  --recursive \
  --shallow-submodules \
  git@github.com:nod-ai/iree-amd-aie.git # https://github.com/nod-ai/iree-amd-aie.git

The above avoids cloning entire repo histories for submodules, and skips a few, currently, unused, submodules that are nested in IREE.

Building (along with IREE)

Just show me the CMake

cd iree-amd-aie
cmake \
  -B <WHERE_YOU_WOULD_LIKE_TO_BUILD> \
  -S third_party/iree \
  -DIREE_CMAKE_PLUGIN_PATHS=$PWD \
  -DIREE_BUILD_PYTHON_BINDINGS=ON \
  -DIREE_INPUT_STABLEHLO=OFF \
  -DIREE_INPUT_TORCH=OFF 
  -DIREE_INPUT_TOSA=OFF \
  -DIREE_HAL_DRIVER_DEFAULTS=OFF \
  -DIREE_TARGET_BACKEND_DEFAULTS=OFF \
  -DIREE_TARGET_BACKEND_LLVM_CPU=ON \
  -DIREE_BUILD_TESTS=ON \
  -DIREE_EXTERNAL_HAL_DRIVERS=xrt-lite \
  -DCMAKE_INSTALL_PREFIX=<WHERE_YOU_WOULD_LIKE_TO_INSTALL>
cmake --build <WHERE_YOU_WOULD_LIKE_TO_BUILD>

Instructions

The bare minimum configure command for IREE with the amd-aie plugin

cmake \
  -B <WHERE_YOU_WOULD_LIKE_TO_BUILD> \
  -S <IREE_REPO_SRC_DIR> \
  -DIREE_CMAKE_PLUGIN_PATHS=<IREE_AMD_AIE_REPO_SRC_DIR> \
  -DIREE_BUILD_PYTHON_BINDINGS=ON

Very likely, you will want to use ccache and lld (or some other modern linker like mold)

  -DCMAKE_C_COMPILER_LAUNCHER=ccache \
  -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
  -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" \
  -DCMAKE_SHARED_LINKER_FLAGS="-fuse-ld=lld"

If you don't plan on using any of IREE's frontends or backends/targets (e.g., you're doing work on this code base itself), you can opt-out of everything (except the llvm-cpu backend) with

  -DIREE_INPUT_STABLEHLO=OFF \
  -DIREE_INPUT_TORCH=OFF \
  -DIREE_INPUT_TOSA=OFF \
  -DIREE_HAL_DRIVER_DEFAULTS=OFF \
  -DIREE_TARGET_BACKEND_DEFAULTS=OFF \
  -DIREE_TARGET_BACKEND_LLVM_CPU=ON 

With the above you can also skip cloning the stablehlo and torch-mlir submodules/repos but in this case you will need to add

  -DIREE_ERROR_ON_MISSING_SUBMODULES=OFF

If you're "bringing your own LLVM", i.e., you have a prebuilt/compiled distribution of LLVM you'd like to use, you can add

  -DIREE_BUILD_BUNDLED_LLVM=OFF

In this case you will need lit somewhere in your environment and you will need to add to CMake -DLLVM_EXTERNAL_LIT=<SOMEWHERE> (e.g., pip install lit; SOMEWHERE=$(which lit)).

See Bringing your own LLVM below for more information on using prebuilt/compiled distributions of LLVM.

Testing

Lit tests (i.e., compiler tests) specific to AIE can be run with something like

cd <WHERE_YOU_WOULD_LIKE_TO_BUILD>
ctest -R amd-aie --output-on-failure -j 10

(the -j 10 runs 10 tests in parallel)

Other tests, which run on device, are in the build_tools subdirectory. See build_tools/ci/run_all_runtime_tests.sh for an example script that shows how to run all the runtime tests.

Pro-tips

Bringing your own LLVM

When using a pre-built distribution of LLVM, getting the right/matching build, that works with IREE, is tough (besides the commit hash, there are various flags to set). To enable adventurous users to avail themselves of -DIREE_BUILD_BUNDLED_LLVM=OFF we cache/store/save the LLVM distribution for every successful CI run. These can then be downloaded by checking the artifacts section of any recent CI run's Summary page:

Debugging HAL

You can turn on HAL API tracing by adding to CMake:

-DIREE_ENABLE_RUNTIME_TRACING=ON
-DIREE_TRACING_PROVIDER=console
// optional but recommended
-DIREE_TRACING_CONSOLE_FLUSH=1

This will you show you all the HAL APIs that have IREE_TRACE_ZONE_BEGIN ... IREE_TRACE_ZONE_END that are hit during a run/execution (of, e.g., iree-run-module).

You can turn on VM tracing by adding to CMake:

-DIREE_VM_EXECUTION_TRACING_ENABLE=1
-DIREE_VM_EXECUTION_TRACING_FORCE_ENABLE=1
// optional
-DIREE_VM_EXECUTION_TRACING_SRC_LOC_ENABLE=1

This will show you all of the VM dispatches that actually occur during a run/execution. Note, this is roughly equivalent to passing --compile-to=vm to iree-compile.

Architectural overview (out of date)