[PATCH] D114479: [LAA] Keep track of ptr SCEV related to MemAccessInfo (WIP).
Florian Hahn via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Nov 23 14:56:19 PST 2021
fhahn created this revision.
Herald added subscribers: javed.absar, hiraditya.
fhahn requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.
This patch extends MemAccessInfo and PointerInfo to track the associated
SCEV for the pointer. The SCEV expressions is then used instead of
accessing ScalarEvolution on demand.
This has multiple benefits:
1. We only need to replace symbolic strides once, up front.
2. Allows for more flexibility to have accesses with different SCEV expressions for their pointers.For example, it allows adding 2 MemAccessInfo for a pointer fed by a select.
This is still a bit rough around the edges. In particular the printing
is still missing the SCEV expression.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D114479
Files:
llvm/include/llvm/Analysis/LoopAccessAnalysis.h
llvm/lib/Analysis/LoopAccessAnalysis.cpp
llvm/lib/Transforms/Scalar/LoopDistribute.cpp
llvm/test/Analysis/LoopAccessAnalysis/pointer-phis.ll
llvm/test/Transforms/LoopLoadElim/symbolic-stride.ll
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