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Minimal MLIR binaries
This folder contains example of minimal MLIR setups that can showcase the intended binary footprint of the framework.
- mlir-cat: This includes the Core IR, the builtin dialect, the textual parser/printer, the support for bytecode serialization.
- mlir-minimal-opt: This adds all the tooling for an mlir-opt tool: the pass infrastructure and all the instrumentation associated with it.
- mlir-miminal-opt-canonicalize: This add the canonicalizer pass, which pulls in all the pattern/rewrite machinery, including the PDL compiler and intepreter.
Below are some example measurements taken at the time of the LLVM 17 release, using clang-14 on a X86 Ubuntu and bloaty.
| Base | Os | Oz | Os LTO | Oz LTO | |
|---|---|---|---|---|---|
mlir-cat |
1024KB | 840KB | 885KB | 706KB | 657KB |
mlir-minimal-opt |
1.62MB | 1.32MB | 1.36MB | 1.17MB | 1.07MB |
mlir-minimal-opt-canonicalize |
1.83MB | 1.40MB | 1.45MB | 1.25MB | 1.14MB |
Base configuration:
cmake ../llvm/ -G Ninja \
-DCMAKE_BUILD_TYPE=RelWithDebInfo \
-DLLVM_CCACHE_BUILD=ON \
-DLLVM_ENABLE_PROJECTS=mlir \
-DLLVM_BUILD_EXAMPLES=ON \
-DLLVM_TARGETS_TO_BUILD="Native" \
-DCMAKE_C_COMPILER=clang \
-DCMAKE_CXX_COMPILER=clang++ \
-DLLVM_ENABLE_LLD=ON \
-DLLVM_ENABLE_BACKTRACES=OFF \
-DMLIR_ENABLE_PDL_IN_PATTERNMATCH=OFF \
-DCMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO=-Wl,-icf=all
Note: to measure the on-disk size, you need to run strip bin/mlir-cat first to
remove all the debug info (which are useful for bloaty though).
The optimization level can be tuned with -Os or -Oz:
-DCMAKE_C_FLAGS_RELWITHDEBINFO="-Os -g -DNDEBUG" -DCMAKE_CXX_FLAGS_RELWITHDEBINFO="-Os -g -DNDEBUG"-DCMAKE_C_FLAGS_RELWITHDEBINFO="-Oz -g -DNDEBUG" -DCMAKE_CXX_FLAGS_RELWITHDEBINFO="-Oz -g -DNDEBUG"
Finally LTO can also be enabled with -DLLVM_ENABLE_LTO=FULL.
Bloaty can provide measurements using:
bloaty bin/mlir-cat -d compileunits --domain=vm or
bloaty bin/mlir-cat -d symbols --demangle=full --domain=vm