Matthew Simpson 27f212d583 [SLP] Stop counting cost of gather sequences with multiple uses ...

When building the SLP tree, we look for reuse among the vectorized tree
entries. However, each gather sequence is represented by a unique tree entry,
even though the sequence may be identical to another one. This means, for
example, that a gather sequence with two uses will be counted twice when
computing the cost of the tree. We should only count the cost of the definition
of a gather sequence rather than its uses. During code generation, the
redundant gather sequences are emitted, but we optimize them away with CSE. So
it looks like this problem just affects the cost model.

Differential Revision: https://reviews.llvm.org/D44742

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328316 91177308-0d34-0410-b5e6-96231b3b80d8

2018-03-23 14:18:27 +00:00

..

CMakeLists.txt

[LV] Fix PR34248 - recommit D32871 after revert r311304

2017-08-27 12:55:46 +00:00

LLVMBuild.txt

Update libdeps since TLI was moved from Target to Analysis in r226078.

2015-01-15 05:21:00 +00:00

LoadStoreVectorizer.cpp

Fix a couple of layering violations in Transforms

2018-03-21 22:34:23 +00:00

LoopVectorizationPlanner.h

Add missing includes

2018-02-02 00:11:09 +00:00

LoopVectorize.cpp

[LV] Let recordVectorLoopValueForInductionCast to check if IV was created from the cast.

2018-03-20 09:04:39 +00:00

SLPVectorizer.cpp

[SLP] Stop counting cost of gather sequences with multiple uses

2018-03-23 14:18:27 +00:00

Vectorize.cpp

Remove redundant includes from lib/Transforms.

2017-12-13 21:31:01 +00:00

VPlan.cpp

[LV] NFC patch for moving VP*Recipe class definitions from LoopVectorize.cpp to VPlan.h

2017-12-16 01:12:50 +00:00

VPlan.h

[LV][VPlan] NFC patch to move LoopVectorizationPlanner class out of LoopVectorize.cpp

2018-01-07 16:02:58 +00:00

VPlanValue.h

[LV] Model masking in VPlan, introducing VPInstructions

2017-11-20 12:01:47 +00:00