[RISCV] Reorder the operands for RISCVISD::PPAIRE_DB. NFC (#180111) Order the operands so the the low and high part of the rs1 regpair are first, followed by the low and high part of the rs2 regpair. Also change the type to use v4i8 for the result so that it's only shuffling elements not combining elements into a larger elment. I'm planning to add ADDD and SUBD opcodes that will be defined with the same operand order allowing RISCVISelDAGToDAG.cpp code to be shared.
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.