034f0f1ad4
Since the removal of the legacy expression lowering (#210385, #210621, #210639, #210873), nothing in flang produces the array-value operations (fir.array_load and friends) that the array-value-copy pass legalizes, so the pass runs as a guaranteed no-op on every function. Remove it from the default pipeline (addAVC and the disable-avc mlir option); the pass itself and its fir-opt tests remain and still run via fir-opt --array-value-copy. The array-value operations themselves and the pass are planned for removal in follow-up patches. flang/test/Fir/arrexp.fir is deleted rather than updated: it feeds legacy array-value ops through tco's full pipeline, which no longer legalizes them (the ops have no codegen patterns), and the file exercises no live feature beyond that legalization. Assisted-by: AI |
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| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| test | ||
| tools | ||
| unittests | ||
| .clang-format | ||
| .clang-tidy | ||
| .drone.star | ||
| .gitignore | ||
| CMakeLists.txt | ||
| LICENSE.TXT | ||
| Maintainers.md | ||
| README.md | ||
Flang
Flang is a ground-up implementation of a Fortran front end written in modern C++. It started off as the f18 project (https://github.com/flang-compiler/f18) with an aim to replace the previous flang project (https://github.com/flang-compiler/flang) and address its various deficiencies. F18 was subsequently accepted into the LLVM project and rechristened as Flang.
Please note that flang is not ready yet for production usage.
Getting Started
Read more about flang in the docs directory. Start with the compiler overview.
To better understand Fortran as a language and the specific grammar accepted by flang, read Fortran For C Programmers and flang's specifications of the Fortran grammar and the OpenMP grammar.
Treatment of language extensions is covered in this document.
To understand the compilers handling of intrinsics, see the discussion of intrinsics.
To understand how a flang program communicates with libraries at runtime, see the discussion of runtime descriptors.
If you're interested in contributing to the compiler, read the style guide and also review how flang uses modern C++ features.
If you are interested in writing new documentation, follow LLVM's Markdown style guide.
Consult the Getting Started with Flang for information on building and running flang.