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authorSanjay Patel <spatel@rotateright.com>2016-10-17 15:58:28 +0000
committerSanjay Patel <spatel@rotateright.com>2016-10-17 15:58:28 +0000
commit2cf6bfaf7383bb6bff0ea288a1020516e1abd868 (patch)
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parent95db75791e48852e5cfdf02236971453f43ff389 (diff)
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[DAG] optimize away an arithmetic-right-shift of a 0 or -1 value
This came up as part of: https://reviews.llvm.org/D25485 Note that the vector case is missed because ComputeNumSignBits() is deficient for vectors. llvm-svn: 284395
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