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33 lines
1.4 KiB
Markdown
33 lines
1.4 KiB
Markdown
# An out-of-tree MLIR dialect
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This is an example of an out-of-tree [MLIR](https://mlir.llvm.org/) dialect along with a standalone `opt`-like tool to operate on that dialect.
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## Building - Component Build
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This setup assumes that you have built LLVM and MLIR in `$BUILD_DIR` and installed them to `$PREFIX`. To build and launch the tests, run
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```sh
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mkdir build && cd build
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cmake -G Ninja .. -DMLIR_DIR=$PREFIX/lib/cmake/mlir -DLLVM_EXTERNAL_LIT=$BUILD_DIR/bin/llvm-lit
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cmake --build . --target check-standalone
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```
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To build the documentation from the TableGen description of the dialect operations, run
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```sh
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cmake --build . --target mlir-doc
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```
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**Note**: Make sure to pass `-DLLVM_INSTALL_UTILS=ON` when building LLVM with CMake in order to install `FileCheck` to the chosen installation prefix.
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## Building - Monolithic Build
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This setup assumes that you build the project as part of a monolithic LLVM build via the `LLVM_EXTERNAL_PROJECTS` mechanism.
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To build LLVM, MLIR, the example and launch the tests run
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```sh
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mkdir build && cd build
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cmake -G Ninja `$LLVM_SRC_DIR/llvm` \
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-DCMAKE_BUILD_TYPE=Release \
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-DLLVM_TARGETS_TO_BUILD=host \
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-DLLVM_ENABLE_PROJECTS=mlir \
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-DLLVM_EXTERNAL_PROJECTS=standalone-dialect -DLLVM_EXTERNAL_STANDALONE_DIALECT_SOURCE_DIR=../
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cmake --build . --target check-standalone
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```
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Here, `$LLVM_SRC_DIR` needs to point to the root of the monorepo.
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