Craig Topper 2617cc5e82
[TargetLowering][RISCV] Avoid ISD::MUL in expandCLMUL if hasBitTest or MUL requires a library call. (#182389)
Scalar multiply is not part of the most basic RISC-V ISA. Use a
and+setcc+select for these targets.

The and+setcc+select is also beneficial for targets with bit test
instructions. RISC-V may not get the full benefit here due to
not having a cmove-like instruction without Zicond.

Co-authored-by: fbrv <Fabio.Baravalle@gmail.com>
2026-02-22 19:20:16 -08:00
2026-01-21 23:14:07 +01:00

The LLVM Compiler Infrastructure

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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.

Description
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
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