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Commit ae1f0134 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] Add PACKUS support to combineVectorTruncation 

Similar to the existing code to lower to PACKSS, we can use PACKUS if the input vector's leading zero bits extend all the way to the packed/truncated value.

We have to account for pre-SSE41 targets not supporting PACKUSDW

llvm-svn: 317315
parent 41e32bfd
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