User:Csfore/LLVM/Polly

Polly is a high-level loop and data-locality optimizer and optimization infrastructure for LLVM. It uses an abstract mathematical representation based on integer polyhedra to analyze and optimize the memory access pattern of a program. We currently perform classical loop transformations, especially tiling and loop fusion to improve data-locality. Polly can also exploit OpenMP level parallelism, expose SIMDization opportunities.

Installation

Important
Polly support for LLVM begins in LLVM 20 and is currently unkeyworded.

USE flags

USE flags for llvm-core/polly Polyhedral optimizations for LLVM

`+debug`	Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces
`test`	Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)

Data provided by the Gentoo Package Database · Last update: 2025-01-11 18:11 More information about USE flags

Emerge

root #emerge --ask llvm-core/polly

Configuration

package.env

FILE /etc/portage/env/polly

COMMON_FLAGS="${COMMON_FLAGS} -fplugin=LLVMPolly.so -mllvm=-polly -mllvm=-polly-vectorizer=stripmine -mllvm=-polly-omp-backend=LLVM -mllvm=-polly-parallel -mllvm=-polly-num-threads=9 -mllvm=-polly-scheduling=dynamic"
CFLAGS="${COMMON_FLAGS}"
CXXFLAGS="${COMMON_FLAGS}"
FCFLAGS="${COMMON_FLAGS}"
FFLAGS="${COMMON_FLAGS}"