c1779f33bd
This patch adds the support of these two directives : `!dir$ inline` and `!dir$ noinline`. - `!dir$ noinline` tells to the compiler to not perform inlining on specific function calls by adding the `noinline` metadata on the call. - `!dir$ inline` tells to the compiler to attempt inlining on specific function calls by adding the `inlinehint` metadata on the call. - `!dir$ forceinline` tells to the compiler to always perfom inlining on specific function calls by adding the `alwaysinline` metadata on the call. Currently, these directives can be placed before a `DO LOOP`, call functions or assignments. Maybe other statements can be added in the future if needed. For the `inline` directive the correct name might be `forceinline` but I'm not sure ?
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.