Getting Started: Building and Installing Polly
Automatic
There is a script available to automatically checkout, update, build, and test Polly. This script contains all the commands that are subsequently described on this webpage. The automatic installation consists of four simple steps:mkdir polly && cd polly wget http://polly.llvm.org/polly.sh chmod +x polly.sh ./polly.sh
Manual
Get the code
The Polly source code is available in the LLVM SVN repository as well as through an official git mirror. It is added to the tools directory of the llvm sources. Polly and LLVM need to be checked out at the same time. Checkouts from different dates may not work!Set the directory layout:
export BASE=`pwd` export LLVM_SRC=${BASE}/llvm export POLLY_SRC=${LLVM_SRC}/tools/polly # Also build the matching clang-version (optional) export CLANG_SRC=${LLVM_SRC}/tools/clang
SVN
svn checkout http://llvm.org/svn/llvm-project/llvm/trunk ${LLVM_SRC} svn checkout http://llvm.org/svn/llvm-project/polly/trunk ${POLLY_SRC} # Also build the matching clang-version (optional) svn checkout http://llvm.org/svn/llvm-project/cfe/trunk ${CLANG_SRC}
GIT
git clone http://llvm.org/git/llvm.git ${LLVM_SRC} git clone http://llvm.org/git/polly.git ${POLLY_SRC} # Also build the matching clang-version (optional) git clone http://llvm.org/git/clang.git ${CLANG_SRC}
Prerequisites
- libgmp
- isl
libgmp
Install libgmp (library + developer package) through the package management system of your operating system.isl
Polly is tested with a fixed version of isl. To obtain the source code of isl use checkout_isl.sh as available in ${POLLY_SRC}/utils/checkout_isl.sh.Set the directory layout:
export ISL_SRC=${BASE}/isl_src export ISL_INSTALL=${BASE}/isl_install
First installation
${POLLY_SRC}/utils/checkout_isl.sh ${ISL_SRC} cd ${ISL_SRC} ./configure --prefix=${ISL_INSTALL} make make install cd ${BASE}
Update the installation
Updating isl may become necessary, if Polly uses a feature only available in a recent version of isl.${POLLY_SRC}/utils/checkout_isl.sh ${ISL_SRC} cd ${ISL_SRC} make make install cd ${BASE}
Build Polly
To build Polly you can either use the autoconf or the cmake build system. At the moment only the autoconf build system allows to run the llvm test-suite and only the cmake build system allows to run 'make check-polly'.Set the directory layout:
export LLVM_BUILD=${BASE}/llvm_build mkdir ${LLVM_BUILD} cd ${LLVM_BUILD}
CMake
cmake -DCMAKE_PREFIX_PATH=${ISL_INSTALL} ${LLVM_SRC} make
Autoconf
${LLVM_SRC}/configure --with-isl=${ISL_INSTALL} make
Test Polly
To check if Polly works correctly you can run make check-polly for the cmake build or make check-polly -C tools/polly/test/ for the autoconf build.
If you get something like "... libisl.so.9: cannot open shared object file ..", it is because you installed isl to a non-standard path, and libisl could not be found. To solve this issue, you need to append the path of parent directory of libisl, i.e. ${ISL_INSTALL}/lib, to LD_LIBRARY_PATH by:
export LD_LIBRARY_PATH=${ISL_INSTALL}/lib:$LD_LIBRARY_PATH
Also try the above command if you get errors such as:
undefined symbol: isl_ctx_get_max_operations
If you get an error in one of the python files, your system probably uses python3
as default python interpreter. This is the case, for instance, under Arch Linux.
To solve this issue, run cmake
again, but with the added argument:
-DPYTHON_EXECUTABLE=/usr/bin/python2
(replace /usr/bin/python2
with the location of the python2 interpreter under your system).
cmake -DCMAKE_PREFIX_PATH=${ISL_INSTALL} -DPYTHON_EXECUTABLE=/usr/bin/python2 ${LLVM_SRC}
Optional Features
Pocc [Supported until LLVM 3.4.2]
Polly can use
PoCC as an external optimizer. PoCC is a research project that provides
an integrated version of Pluto, an
advanced data-locality and tileability optimizer. Polly includes internally
already a similar optimizer, such that in general PoCC is not needed. It is
only recommended for people who want to compare against a different
optimizer.
To use it install PoCC 1.0-rc3.1 (the one with Polly support) and add it to your PATH.
wget http://www.cse.ohio-state.edu/~pouchet/software/pocc/download/pocc-1.0-rc3.1-full.tar.gz tar xzf pocc-1.0-rc3.1-full.tar.gz cd pocc-1.0-rc3.1 ./install.sh export PATH=$PATH:`pwd`/binYou also need to install scoplib-0.2.0 and provide its location to Polly's cmake or configure call.
wget http://www.cse.ohio-state.edu/~pouchet/software/pocc/download/modules/scoplib-0.2.0.tar.gz tar xzf scoplib-0.2.0.tar.gz cd scoplib-0.2.0 ./configure --enable-mp-version --prefix=/path/to/scoplib/installation make && make install