llvm-project.git/llvm/test/Transforms/LoopPredication/profitability.ll, branch users/nico/python-2

[LoopPredication] Fix the LoopPredication by feezing the result of predication.

2023-03-29T08:12:00+00:00

LoopPredication introduces the use of possibly posion value in branch (guard)
instruction, so to avoid introducing undefined behavior it should be frozen.

Reviewed By: mkazantsev
Differential Revision: https://reviews.llvm.org/D146685

[LoopPredication] Convert tests to opaque pointers (NFC)

2023-01-02T15:52:03+00:00

[LoopPredication] Insert assumes of conditions of predicated guards

2022-10-07T09:10:24+00:00

As LoopPredication performs non-equivalent transforms removing some
checks from loops, other passes may not be able to perform transforms
they'd be able to do if the checks were left in loops.

This patch makes LoopPredication insert assumes of the replaced
conditions either after a guard call or in the true block of
widenable condition branch.

Differential Revision: https://reviews.llvm.org/D135354

[LoopPredication] Calculate profitability without BPI

2021-10-19T18:24:04+00:00

Using BPI within loop predication is non-trivial because BPI is only
preserved lossily in loop pass manager (one fix exposed by lossy
preservation is up for review at D111448). However, since loop
predication is only used in downstream pipelines, it is hard to keep BPI
from breaking for incomplete state with upstream changes in BPI.
Also, correctly preserving BPI for all loop passes is a non-trivial
undertaking (D110438 does this lossily), while the benefit of using it
in loop predication isn't clear.

In this patch, we rely on profile metadata to get almost similar benefit as
BPI, without actually using the complete heuristics provided by BPI.
This avoids the compile time explosion we tried to fix with D110438 and
also avoids fragile bugs because BPI can be lossy in loop passes
(D111448).

Reviewed-By: asbirlea, apilipenko
Differential Revision: https://reviews.llvm.org/D111668

Add profile count. Regenerate check lines. NFC

2021-09-28T19:33:49+00:00

Function profile counts added to test cases. Regenerated test lines for
loop predication test.

[LoopPredication] Preserve MemorySSA

2021-08-26T15:36:25+00:00

Since LICM has now unconditionally moved to MemorySSA based form, all
passes that run in same LPM as LICM need to preserve MemorySSA (i.e. our
downstream pipeline).

Added loop-mssa to all tests and perform -verify-memoryssa within
LoopPredication itself.

Differential Revision: https://reviews.llvm.org/D108724

Revert "Temporarily Revert "Add basic loop fusion pass.""

2019-04-17T04:52:47+00:00

The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552

Temporarily Revert "Add basic loop fusion pass."

2019-04-17T02:12:23+00:00

As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

llvm-svn: 358546

[LoopPred] Delete the old condition expressions if unused

2019-04-01T16:05:15+00:00

LoopPredication was replacing the original condition, but leaving the instructions to compute the old conditions around.  This would get cleaned up by other passes of course, but we might as well do it eagerly.  That also makes the test output less confusing.  

llvm-svn: 357406

[Tests] Autogen all the LoopPredication tests

2019-04-01T15:35:30+00:00

I'm about to make some changes to the pass which cause widespread - but uninteresting - test diffs.  Prepare the tests for easy updating.

llvm-svn: 357404