[PATCH] D80529: [DDG] Data Dependence Graph - Add query function for memory dependencies between two nodes

[Bardia Mahjour via Phabricator via llvm-commits]

bmahjour created this revision.
bmahjour added reviewers: Meinersbur, etiotto, Whitney.
bmahjour added a project: LLVM.
Herald added a subscriber: mgorny.

When working with the DDG it's useful to be able to query details of the memory dependencies between two nodes connected by a memory edge. The DDG does not hold a copy of the dependencies, but it contains a reference to a DependenceInfo object through which dependence information can be queried. This patch adds a query function to the DDG to obtain all the `Dependence` objects that exist between instructions of two nodes.

The same function has also been proposed under https://reviews.llvm.org/D73801, but since the review may take loner we'd like to add this query function as a separate revision here to unblock other uses of the DDG.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D80529

Files:
  llvm/include/llvm/Analysis/DDG.h
  llvm/unittests/Analysis/CMakeLists.txt
  llvm/unittests/Analysis/DDGTest.cpp

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