This release includes sevaral improvments compared to the previous
version isl-0.16.1-145-g243bf7c (from the ISL 0.17 announcement):
- optionally combine SCCs incrementally in scheduler
- optionally maximize coincidence in scheduler
- optionally avoid loop coalescing in scheduler
- minor AST generator improvements
- improve support for expansions in schedule trees
llvm-svn: 268500
This commit updates to the latest isl development version. There is no specific
feature we need on the Polly side, but we want to ensure test coverage for the
latest isl changes.
llvm-svn: 262001
This includes some (optional) improvements to the isl scheduler, which we do not
use yet, as well as a fix for a bug previously also affecting Polly:
commit 662ee9b7d45ebeb7629b239d3ed43442e25bf87c
Author: Sven Verdoolaege <skimo@kotnet.org>
Date: Mon Jan 25 16:59:32 2016 +0100
isl_basic_map_realign: perform Gaussian elimination on result
Many parts of isl assume that Gaussian elimination has been
applied to the equality constraints. In particular singleton_extract_point
makes this assumption. The input to singleton_extract_point
may have undergone parameter alignment. This parameter alignment
(ultimately performed by isl_basic_map_realign) therefore
needs to make sure the result preserves this property
llvm-svn: 259757
This update brings in improvements to isl's 'isolate' option that reduce the
number of code versions generated. This results in both code-size and compile
time reduction for outer loop vectorization.
Thanks to Roman Garev and Sven Verdoolaege for working on this improvement.
llvm-svn: 254706
The motivation is to fix a compilation error with Visual Studio 2013.
See http://reviews.llvm.org/D14886.
Thanks to Sumanth Gundapaneni for finding the issue and suggesting a
patch.
llvm-svn: 254498
The script will checkout the most recent master from
http://repo.or.cz/isl.git into /tmp, create a distribution tarball, and
extract it as replacement of lib/External/isl. After that it can be
committed to the Polly repository.
llvm-svn: 254497
The most interesting change for Polly in this isl update is 4d5654af which
in certain cases can speed up the construction of run-time checks from an isl
set consisting of several disjuncts significantly.
llvm-svn: 253794
Clang's been taught to warn on more things here (unused values when
calling pure functions and ignoring their result, for example).
It might be better to figure out how to have cmake compile these tests
without -Werror/without any warnings enabled. But this'll do for now & I
don't know enough about cmake to fix it any other way, or to understand
the tradeoffs in that space.
llvm-svn: 249472
Refactor all ISL-related cmake build instructions into its own
CMakeLists.txt and build as a separate library.
This is useful to apply ISL-related build flags to ISL only and not to
Polly's files. Also, it the separation of both projects becomes clearer.
Proposed name of the library is Polly_isl. It is not "isl" to avoid
mix-up with potentially installed libisl.{a|so}.
Tested configurations:
- Windows with cmake 3.2
- Ubuntu with cmake 3.0.2
- Ubuntu with cmake 3.0.2 BUILD_SHARED_LIBS on
- Ubuntu with cmake 2.8.12.2 (LLVM minimum version)
- Ubuntu out-of-LLVM-tree
Differential Revision: http://reviews.llvm.org/D12810
llvm-svn: 248484
Besides other changes this version of isl contains a fundamental fix to memory
corruption issues we have seen with imath-32 backed isl_ints.
This update also contains a fix that ensures that the schedule-tree based
version of isl's dependence analysis takes the domain of the schedule into
account.
llvm-svn: 244585
Besides a couple of cleanups and refactorings in isl, this change set fixes a
couple of bugs in isl, that can cause issues during code generation.
llvm-svn: 243110
A similar patch will be upstreamed to ISL. We commit this ahead of time to
unblock people that are annoyed the permanent diffs we see in git.
llvm-svn: 243020
Query the isl_config.h macros recently added to ISL. One of it looks for
the ffs (find first set), whose functionality is available in Visual
Studio with _BitScanForward. Also add isl_ffs.c to the source files
which contains the implementation of ffs using _BitScanForward.
Reviewers: grosser
llvm-svn: 242770
This updated contains various changes to isl, including improvements to the
AST generator. For Polly, the most important change is a fix that unbreaks
builds on darwin (reported by: Jack Howard)
llvm-svn: 241048
The 'make dist' archive is not dependent on ./configure output and
contains a GIT_HEAD_ID file that identifies the version of ISL used.
None of the files added or removed are used part of Polly's build
process (except of GIT_HEAD_ID since the previous revision r240301). No
functional change intended.
llvm-svn: 240306
Currently the Polly repository contains the ISL sources with bogus
isl_config.h and gitversion.h. This is problematic. In this state a
macro
#define __attribute__(x)
becomes active in the source, leading to various problems e.g. when
included before system header files. This patch will instead generate
the two files specific to the host system at configure-time.
For CMake, we replicate the tests that ISL's configure performs using
try_compile(). In autotools build, we just invoke ISL's configure to
generate the two files. This consequently required regenerating
autoconf/configure.
'make dist' distributions of ISL contain a file GIT_HEAD_ID which
contains the version the distribution is derived from. The repository
files themselves do not contain such a hint. In a later commit we will
replace the isl directory by the contents of such a .tar.gz. It does
not contain the files imdrover.c iprime.c pi.c and rsamath.c currently
compiled into Polly, but not used and therefore are removed by this
patch.
In the long term we plan to generate a dedicated library for ISL instead
of adding its files to Polly.
This also does not yet include the switch to small-integer optimized ISL
nor enabling C99 mode required for the former. Those will come as well
in separate patches.
Differential version: http://reviews.llvm.org/D10603
Reviewers: grosser
llvm-svn: 240301
This was meant to committed in r240027, but was left behind because
svn, in contrast to git, only commits the changes in the directory you
are currently in.
llvm-svn: 240034
This version adds small integer optimization, but is not active by
default. It will be enabled in a later commit.
The schedule-fuse=min/max option has been replaced by the
serialize-sccs option. Adapting Polly was necessary, but retaining the
name polly-opt-fusion=min/max.
Differential Revision: http://reviews.llvm.org/D10505
Reviewers: grosser
llvm-svn: 240027
Besides a couple of interface cleanups, this change also contains a performance
optimization of isl_mat_product that should give us up to almost 6% compiletime
reduction.
llvm-svn: 237616
For Polly the two interesting changes are short_circuit && and || AST
expressions as well as the introduction of isl_ast_build_expr_from_set,
a well defined interface to compute ast expressions from constraint sets.
llvm-svn: 230636
This update contains:
- Fixes of minor issues detected by clang's scan_build
- More schedule tree infrastructure additions
This update slightly changes the output of our dependence analysis, but these
changes are purely syntactially.
llvm-svn: 230528
This is just a single commit that includes a performance optimization that
should improve dependence analysis time. Our performance bots should measure
this difference.
llvm-svn: 229476
This commit imports the latest isl version into lib/External/isl. The changes
relavant for Polly are:
1) Schedule trees [1] have been introduced as a more structured way to
describe schedules. Polly does not yet use them, but we may switch to them
in the near future.
2) Another set of coalescing changes [2] simplifies some data dependences and
removes a couple of code generation artifacts.
We now understand that the following sets can be merged:
{ Stmt_S1[i0, i1] -> Stmt_S2[i0 + i1] :
i0 >= 0 and i1 <= 1023 - i0 and i1 >= 1
Stmt_S1[i0, 0] -> Stmt_S2[i0] : i0 <= 1023 and i0 >= 1}
into:
{ Stmt_S1[i0, i1] -> Stmt_S2[i0 + i1] : i1 <= 1023 - i0 and i1 >= 0 and
i1 >= 1 - i0 and i0 >= 0 }
Changes of this kind reduce unnecessary specialization during code
generation.
- for (int c3 = 0; c3 <= 1023; c3 += 1) {
- if (c3 % 2 == 0) {
- Stmt_for_body3(c1, c3);
- } else
- Stmt_for_body3(c1, c3);
- }
+ for (int c3 = 0; c3 <= 1023; c3 += 1)
+ Stmt_for_body3(c1, c3);
[1] http://impact.gforge.inria.fr/impact2014/papers/impact2014-verdoolaege.pdf
[2] http://impact.gforge.inria.fr/impact2015/papers/impact2015-verdoolaege.pdf
llvm-svn: 229423
With this patch Polly is always GPL-free (no dependency on GMP any more). As a
result, building and distributing Polly will be easier. Furthermore, there is no
need to tightly coordinate isl and Polly releases anymore.
We import isl b3e0fa7a05d as well as imath 4d707e5ef2. These are the git
versions Polly currently was tested with when using utils/checkout_isl.sh. The
imported libraries are both MIT-style licensed.
We build isl and imath with -fvisibility=hidden to avoid clashes in case other
projects (such as gcc) use conflicting versions of isl. The use of imath can
temporarily reduce compile-time performance of Polly. We will work on
performance tuning in tree.
Patches to isl should be contributed first to the main isl repository and can
then later be reimported to Polly.
This patch is also a prerequisite for the upcoming isl C++ interface.
llvm-svn: 228193
Tobias Grosser