[PATCH] D106668: [DAG] Add initial SelectionDAG::isGuaranteedNotToBeUndefOrPoison framework (PR51129)
Simon Pilgrim via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Jul 23 07:45:28 PDT 2021
RKSimon created this revision.
RKSimon added reviewers: efriedma, aqjune, spatel.
Herald added subscribers: ecnelises, steven.zhang, hiraditya.
RKSimon requested review of this revision.
Herald added a project: LLVM.
I've setup the basic framework for the isGuaranteedNotToBeUndefOrPoison call and updated DAGCombiner::visitFREEZE to use it, further Opcodes can be handled when we have test coverage.
I'm not aware of any vector test freeze coverage so the DemandedElts (and the Depth) args are not being used yet - but they are in place.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D106668
Files:
llvm/include/llvm/CodeGen/SelectionDAG.h
llvm/include/llvm/CodeGen/TargetLowering.h
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
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