Commit Graph

7 Commits

Author SHA1 Message Date
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
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 683b8e4462 Remove -polly-codegen-scev option and related code
SCEV based code generation has been the default for two weeks after having
been tested for a long time. We now drop the support the non-scev-based code
generation.

llvm-svn: 222978
2014-11-30 14:33:31 +00:00
Tobias Grosser b5f92892d1 Remove unneeded RegionSimplify pass.
We now support regions with multiple entries and multiple exits natively.
Regions are not needed to be simplified to single entry and single exit.

We need to XFAIL two test cases as this change increases the scop coverage
and uncoveres two failures in the independent blocks pass. The first failure
will be fixed in a subsequent commit, the second one is in the non-default
-polly-codegen-scev mode and still needs to be fixed.

Contributed-by: Star Tan <tanmx_star@yeah.net>
llvm-svn: 179673
2013-04-17 07:20:30 +00:00
Tobias Grosser 0ee50f6ee4 Support SCoPs with multiple exit edges
Regions that have multiple exit edges are very common. A simple if condition
yields e.g. such a region:

        if
      /   \
  then     else
      \   /
      after

Region: if -> after

This regions contains the bbs 'if', 'then', 'else', but not 'after'. It has
two exit edges 'then' -> 'after' and 'else' -> 'after'.

Previously we scheduled the RegionSimplify pass to translate such regions into
simple regions. With this patch, we now support them natively.

Contributed-by: Star Tan <tanmx_star@yeah.net>
llvm-svn: 179159
2013-04-10 06:55:31 +00:00
Tobias Grosser 826b2af112 Remove last uses of canoncial induction variable when scev code generating
We now detect scops without a canonical induction variable and can generate a
polyhedral representation for them. There was no modification necessary to
code generate these scops.

llvm-svn: 177643
2013-03-21 16:14:50 +00:00
Tobias Grosser e4584f6abf ScopDetect: Add test cases for non-simple regions
llvm-svn: 177567
2013-03-20 20:02:35 +00:00