mlir-rustc

> export LLVM_BUILD_DIR=

> export LLVM=$LLVM_BUILD_DIR/lib/cmake/llvm
> export MLIR=$LLVM_BUILD_DIR/lib/cmake/mlir
> cmake -DCMAKE_BUILD_TYPE=Debug -DLLVM_DIR=$LLVM -DMLIR_DIR=$MLIR .
> make
> ctest

Requirements

• trunk LLVM/MLIR
• cmake
• Google Test
• icu
• doxygen

TODO

• keywords
• Rewriter for borrow ops
• UTF-8
• Remarks
• Mir to LLVM
• async and await
• Closures (nested regions)
• visibility
• visibility checks in inliner
• location in Lexer
• unsafe checker
• cover all tokens
• types
• patterns
• error progation
• type uniquing or equivalence?
• iterators
• .pcm
• outer attributes on expressions
• outer attributes on item
• macros
• precedence
• rustc prefers One-symbol tokens. Solution for Axum?
• drops
• copy

References

• https://mlir.llvm.org/docs/Tutorials/Toy/Ch-6/
• https://github.com/zero9178/Pylir
• https://github.com/intel/llvm/tree/sycl-mlir/mlir-sycl
• https://mlir.llvm.org/docs/Dialects/ArithOps/
• https://discourse.llvm.org/t/rfc-a-dataflow-analysis-framework/63340
• https://llvm.org/devmtg/2019-10/slides/Doerfert-Attributor.pdf
• https://github.com/iree-org/iree/blob/main/compiler/src/iree/compiler/Dialect/Util/Analysis/DFX/Solver.h
• https://llvm.org/devmtg/2020-09/slides/The_Present_and_Future_of_Interprocedural_Optimization_in_LLVM.pdf
• https://llvm.org/devmtg/2020-09/slides/A_Deep_Dive_into_Interprocedural_Optimization.pdf
• https://mapping-high-level-constructs-to-llvm-ir.readthedocs.io/en/latest/
• https://discourse.llvm.org/t/representing-anonymous-functions-lambdas/4962/3

Async

• https://mlir.llvm.org/docs/Dialects/AsyncDialect/
• https://discourse.llvm.org/t/rfc-new-dialect-for-modelling-asynchronous-execution-at-a-higher-level/1345/11
• https://discourse.llvm.org/t/value-range-analysis-of-source-code-variables/62853/5
• https://discourse.llvm.org/t/upstreaming-from-our-mlir-python-compiler-project/64931

Rust

• https://doc.rust-lang.org/reference/expressions/await-expr.html
• https://doc.rust-lang.org/reference/expressions/operator-expr.html#borrow-operators
• https://github.com/LightningCreations/lccc
• https://github.com/thepowersgang/mrustc
• https://rustc-dev-guide.rust-lang.org/about-this-guide.html
• https://spec.ferrocene.dev/index.html
• https://github.com/Rust-GCC/gccrs

MIR

• https://blog.rust-lang.org/2016/04/19/MIR.html
• https://rustc-dev-guide.rust-lang.org/mir/index.html

@inproceedings{lattner2021mlir,
  title={Mlir: Scaling compiler infrastructure for domain specific computation},
  author={Lattner, Chris and Amini, Mehdi and Bondhugula, Uday and Cohen, Albert and Davis, Andy and Pienaar, Jacques and Riddle, River and Shpeisman, Tatiana and Vasilache, Nicolas and Zinenko, Oleksandr},
  booktitle={2021 IEEE/ACM International Symposium on Code Generation and Optimization (CGO)},
  pages={2--14},
  year={2021},
  organization={IEEE}
}

Ideas

• https://icl.utk.edu/papi/

• PGO + Instruction counters: where to optimize and not how to optimize

• ThinLTO at MLIR

• https://reviews.llvm.org/D137956

• attributer on Mir

• https://discourse.llvm.org/t/rfc-globalisel-replace-the-current-globalisel-matcher-with-a-bottom-up-matcher/67530

• https://discourse.llvm.org/t/thinlto-import-functions-to-enable-function-specialization-in-thinlto/58627

> tokei

Dialects

• Mir
• arith
• func
• async
• memref
• controlflow

https://reviews.llvm.org/D142244

https://reviews.llvm.org/D141820

https://reviews.llvm.org/D142897

• Distributed ThinLTO for MachO https://reviews.llvm.org/D138451

• CycleInfo https://reviews.llvm.org/D112696

• ThinLTO for MachO https://reviews.llvm.org/D90663

• __builtin_assume_separate_storage https://reviews.llvm.org/D136515

• hlfir.forall https://reviews.llvm.org/D149734

• assignment mask operations https://reviews.llvm.org/D149754

• A new code layout algorithm for function reordering https://reviews.llvm.org/D152834

• [FLang] Add support for Rpass flag https://reviews.llvm.org/D156320

[GlobalISel] Introduce global variant of regbankselect

• https://reviews.llvm.org/D90304