76916669b9
This patch adds initial lowering for DeclareTargetAttr on GlobalOp's utilising registerTargetGlobalVariable and getAddrOfDeclareTargetVar from the OMPIRBuilder. It also adds initial processing of declare target map operands, populating the combinedInfo that the OMPIRBuilder requires to generate kernels and it's kernel argument structure. The combination of these additions allows simple mapping of declare target globals to Target regions, as such a simple runtime test showcasing this and testing it has been added. The patch currently does not factor in filtering based on device_type clauses (e.g. no emission of globals for device if host specified), this will come in a future iteration. And for the moment it's only been tested with 1-D arrays and basic fortran data types, more complex types (such as user defined derived types from Fortran, allocatables or Fortran pointers) may need further work. reviewers: kiranchandramohan, skatrak Differential Revision: https://reviews.llvm.org/D149368 |
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| .clang-format | ||
| .clang-tidy | ||
| .drone.star | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| LICENSE.TXT | ||
| 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.