llvm-reduce: Add values to return reduction (#132686) In void functions, try to replace instruction uses with a new non-void return. If the return type matches the instruction, also try to directly return it. This handles most of the cases, but doesn't try to handle all of the weird exception related terminators. Also doesn't try to replace argument uses, although it could. We could also handle cases where we can insert a simple cast to an original return value. I didn't think too hard about where to put this in the default pass order. In many cases it obviates the need for most of the CFG folds, but I've left it near the end initially. I also think this is too aggressive about removing dead code, and should leave existing dead code alone. I'm also not sure why we have both "removeUnreachableBlocks" and EliminateUnreachableBlocks" in Utils. Fixes #66039, fixes #107327
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.