[NVPTX] Use .common linkage for common globals (#84416) Switch from `.weak` to `.common` linkage for common global variables where possible. The `.common` linkage is described in [PTX ISA 11.6.4. Linking Directives: .common](https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#linking-directives-common) > Declares identifier to be globally visible but “common”. > >Common symbols are similar to globally visible symbols. However multiple object files may declare the same common symbol and they may have different types and sizes and references to a symbol get resolved against a common symbol with the largest size. > >Only one object file can initialize a common symbol and that must have the largest size among all other definitions of that common symbol from different object files. > >.common linking directive can be used only on variables with .global storage. It cannot be used on function symbols or on symbols with opaque type.
Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
Consult the Getting Started with LLVM page for information on building and running LLVM.
For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.
Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.
The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.