Commit Graph

13 Commits

Author SHA1 Message Date
Tobias Grosser b3a85884f7 Do not use wrapping ranges to bound non-affine accesses
When deriving the range of valid values of a scalar evolution expression might
be a range [12, 8), where the upper bound is smaller than the lower bound and
where the range is expected to possibly wrap around. We theoretically could
model such a range as a union of two non-wrapping ranges, but do not do this
as of yet. Instead, we just do not derive any bounds. Before this change,
we could have obtained bounds where the maximal possible value is strictly
smaller than the minimal possible value, which is incorrect and also caused
assertions during scop modeling.

llvm-svn: 294891
2017-02-12 08:11:12 +00:00
Johannes Doerfert 4ba65a5622 [GSoC 2016]New function pass ScopInfoWrapperPass
This patch adds a new function pass ScopInfoWrapperPass so that the
polyhedral description of a region, the SCoP, can be constructed and
used in a function pass.

Patch by Utpal Bora <cs14mtech11017@iith.ac.in>

Differential Revision: http://reviews.llvm.org/D20962

llvm-svn: 273856
2016-06-27 09:32:30 +00:00
Tobias Grosser 25e8ebe29d Drop explicit -polly-delinearize parameter
Delinearization is now enabled by default and does not need to explicitly need
to be enabled in our tests.

llvm-svn: 264154
2016-03-23 13:21:02 +00:00
Johannes Doerfert e708790c59 [FIX] Two "off-by-one" error in constant range usage
llvm-svn: 260031
2016-02-07 13:59:03 +00:00
Michael Kruse 959a8dc39f Update to ISL 0.16.1
llvm-svn: 257898
2016-01-15 15:54:45 +00:00
Michael Kruse 5a9a65e43f Prepare unit tests for update to ISL 0.16
ISL 0.16 will change how sets are printed which breaks 117 unit tests
that text-compare printed sets. This patch re-formats most of these unit
tests using a script and small manual editing on top of that. When
actually updating ISL, most work is done by just re-running the script
to adapt to the changed output.

Some tests that compare IR and tests with single CHECK-lines that can be
easily updated manually are not included here.

The re-format script will also be committed afterwards. The per-test
formatter invocation command lines options will not be added in the near
future because it is ad hoc and would overwrite the manual edits.
Ideally it also shouldn't be required anymore because ISL's set printing
has become more stable in 0.16.

Differential Revision: http://reviews.llvm.org/D16095

llvm-svn: 257851
2016-01-15 00:48:42 +00:00
Tobias Grosser f4ee371e60 tests: Drop -polly-detect-unprofitable and -polly-no-early-exit
These flags are now always passed to all tests and need to be disabled if
not needed. Disabling these flags, rather than passing them to almost all
tests, significantly simplfies our RUN: lines.

llvm-svn: 249422
2015-10-06 15:36:44 +00:00
Johannes Doerfert be40996cfe Strip constant factors from SCoP parameters
This will strip the constant factor of a parameter befor we add it to
  the SCoP. As a result the access functions are simplified, e.g., for
  the attached test case.

llvm-svn: 233501
2015-03-29 20:45:09 +00:00
Tobias Grosser bf7193ae61 Update test cases to work independently of delinearization default
llvm-svn: 231594
2015-03-08 15:21:15 +00:00
David Blaikie bad3ff207f Update Polly tests to handle explicitly typed gep changes in LLVM
llvm-svn: 230784
2015-02-27 19:20:19 +00:00
Johannes Doerfert e70449400f Add ScalarEvolution bounds to non-affine access functions
llvm-svn: 230328
2015-02-24 11:58:30 +00:00
Tobias Grosser d1e33e7061 ScopDetection: Only detect scops that have at least one read and one write
Scops that only read seem generally uninteresting and scops that only write are
most likely initializations where there is also little to optimize.  To not
waste compile time we bail early.

Differential Revision: http://reviews.llvm.org/D7735

llvm-svn: 229820
2015-02-19 05:31:07 +00:00
Tobias Grosser 230acc4445 Delinearize _all_ accesses to a multi-dimensional array
Even though we previously correctly detected the multi-dimensional access
pattern for accesses with a certain base address, we only delinearized
non-affine accesses to this address. Affine accesses have not been touched and
remained as single dimensional accesses. The result was an inconsistent
description of accesses to the same array, with some being one dimensional and
some being multi-dimensional.

This patch ensures that all accesses are delinearized with the same
dimensionality as soon as a single one of them has been detected as non-affine.

While writing this patch, it became evident that the options
-polly-allow-nonaffine and -polly-detect-keep-going have not been properly
supported in case delinearization has been turned on. This patch adds relevant
test coverage and addresses these issues as well. We also added some more
documentation to the functions that are modified in this patch.

This fixes llvm.org/PR20123

Differential Revision: http://reviews.llvm.org/D5329

llvm-svn: 217728
2014-09-13 14:47:55 +00:00