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2df8ac84ae
The old-fashioned many-to-one value mapping doesn't always work when merging vector lanes. A value can map to multiple different values, and it can even be necessary to insert new PHIs. When a value number is defined by a copy from a value number that required SSa update, include the live range of the copied value number in the SSA update as well. It is not necessarily a copy of the original value number any longer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164329 91177308-0d34-0410-b5e6-96231b3b80d8 |
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