[SCEVDivision] Add SCEVDivisionPrinterPass with corresponding tests (#155832) This patch introduces `SCEVDivisionPrinterPass` and registers it under the name `print<scev-division>`, primarily for testing purposes. This pass invokes `SCEVDivision::divide` upon encountering `sdiv`, and prints the numerator, denominator, quotient, and remainder. It also adds several test cases, some of which are currently incorrect and require fixing. Along with that, this patch added some comments to clarify the behavior of `SCEVDivision::divide`, as follows: - This function does NOT actually perform the division - Given the `Numerator` and `Denominator`, find a pair `(Quotient, Remainder)` s.t. `Numerator = Quotient * Denominator + Remainder` - The common condition `Remainder < Denominator` is NOT necessarily required - There may be multiple solutions for `(Quotient, Remainder)`, and this function finds one of them - Especially, there is always a trivial solution `(0, Numerator)` - The following computations may wrap - The multiplication of `Quotient` and `Denominator` - The addition of `Quotient * Denominator` and `Remainder` Related discussion: #154745
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.