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authorSimon Pilgrim <llvm-dev@redking.me.uk>2018-12-19 10:41:06 +0000
committerSimon Pilgrim <llvm-dev@redking.me.uk>2018-12-19 10:41:06 +0000
commit2072b5afbec0e7e4a56c99bc47dabf086efc8ee9 (patch)
tree97445a546f829be34fb4dfab611bf209c1f1e53e /lldb/packages/Python/lldbsuite/test/python_api
parentd4b077698afff95c783f13b365f30607aa7e3bfe (diff)
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[SelectionDAG] Optional handling of UNDEF elements in matchUnaryPredicate
Now that SimplifyDemandedBits/SimplifyDemandedVectorElts are simplifying vector elements, we're seeing more constant BUILD_VECTOR containing UNDEFs. This patch provides opt-in handling of UNDEF elements in matchUnaryPredicate, passing NULL instead of the ConstantSDNode* argument. I've updated SelectionDAG::simplifyShift to demonstrate its use. Differential Revision: https://reviews.llvm.org/D55819 llvm-svn: 349616
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