b06e736982
The `FA < FB` check added by https://reviews.llvm.org/D153096 is slow. Compute an informal layout order to speed up computation when `AttemptToFoldSymbolOffsetDifference` is repeatedly called for the same section. Commit 9500a5d02e23f9b43294e5f662ac099f8989c0e4 ("[MC] Make UseAssemblerInfoForParsing mostly true") exposed this performance pitfall, which was mitigated by `setUseAssemblerInfoForParsing(false)` workarounds (e.g. commit 245491a9f384e4c53421196533c2a2b693efaf8d). The workaround can be removed now.
The LLVM Compiler Infrastructure
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.
Getting the Source Code and Building LLVM
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.
Getting in touch
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.