Commit Graph

10 Commits

Author SHA1 Message Date
Michael Kruse d262feff80 Add space between access string and follow-up.
llvm-svn: 279826
2016-08-26 15:43:52 +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
Tobias Grosser 09d3069740 Rename IslCodeGeneration to CodeGeneration
Besides class, function and file names, we also change the command line option
from -polly-codegen-isl to just -polly-codegen. The isl postfix is a leftover
from the times when we still had the CLooG based -polly-codegen. Today it is
just redundant and we drop it.

llvm-svn: 237099
2015-05-12 07:45:52 +00:00
David Blaikie 4a54fae8cb Test case updates for explicit type parameter to the gep operator
llvm-svn: 232186
2015-03-13 18:21:20 +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
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 b05b038b81 Switch default code generation backend to isl
The isl based backend has been tested since a long time and with the recently
commited OpenMP support the last missing piece of functionality was ported from
the CLooG backend.

The isl based backend gives us interesting new functionality:

  - Run-time alias checks (enabled by default)

  Optimize scops that contain possibly aliasing pointers. This feature has
  largely increased the number of loop nests we consider for optimization.

  Thanks Johannes!

  - Delinearization (not yet enabled by default)

  Model accesses to multi-dimensional arrays precisely. This will allow us to
  understand kernels with multi-dimensional VLAs written in Julia, boost::ublas,
  coremark or C99.

  Thanks Sebastian!

  - Generation of higher quality code

  Sven and me spent a long time to optimize the quality of the generated code. A
  major focus were expressions as they result from modulos/divisions or
  piecewise affine expressions (a ? b : c).

  - Full/Partial tile separation, polyhedral unrolling

  The isl code generation provides functionality to generate specialized code
  for core and cleanup loops and to specialize code using polyhedral context
  information while unrolling statements.

  (not yet exploited in Polly)

  - Modifieable access functions

  We can now use standard isl functionality to remap memory accesses to new
  data locations. A standard use case is the use of shared memory, where
  accesses to a larger region in global memory need to be mapped to a smaller
  shared memory region using a modulo mapping.

  (not yet exploited in Polly)

The cloog based code generation is still available for comparision, but is
scheduled for removal.

llvm-svn: 222101
2014-11-16 17:02:11 +00:00
Johannes Doerfert 731685e6bc Allow the VectorBlockGenerator to use the IslExprBuilder.
This also enables the VectorBlockGenerator to build load store
  accesses according to the newAccessRelation of a MemoryAccess.

llvm-svn: 219321
2014-10-08 17:25:30 +00:00
Johannes Doerfert b164c795b7 [RTC] Runtime Alias Checks for the ISL backend
This change will build all alias groups (minimal/maximal accesses
  to possible aliasing base pointers) we have to check before
  we can assume an alias free environment. It will also use these
  to create Runtime Alias Checks (RTC) in the ISL code generation
  backend, thus allow us to optimize SCoPs despite possibly aliasing
  pointers when this backend is used.

  This feature will be enabled for the isl code generator, e.g.,
  --polly-code-generator=isl, but disabled for:
    - The cloog code generator (still the default).
    - The case delinearization is enabled.
    - The case non-affine accesses are allowed.

llvm-svn: 218046
2014-09-18 11:17:17 +00:00
Johannes Doerfert b5d1c322f2 Update the jscop tests and port them to isl codegen.
The updated tests use a different context than the old ones did.
  Other than that only their path and the code generation we use
  changed.

llvm-svn: 214657
2014-08-03 01:48:49 +00:00