The Armv9.6-A compare-and-branch instructions use a short range 9-bit immediate value. They do not have a corresponding relocation type in the ABI. For now we only support them in compact code model, with diagnostics added in the LongJmp pass to ensure this condition. Some interesting edge cases we cover: - function splitting works when target is within or beyond the 1KB range of those instructions, - but doesn't work beyond the 128MB limit of the compact code model - branch inversion works with block reordering so long as the immediate value adjustments remain in bounds
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.
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