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Commit fad2761c authored by Tim Northover's avatar Tim Northover
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InstCombine: form shuffles from wider range of insert/extractelements

Sequences of insertelement/extractelements are sometimes used to build
vectorsr; this code tries to put them back together into shuffles, but
could only produce a completely uniform shuffle types (<N x T> from two
<N x T> sources).

This should allow shuffles with different numbers of elements on the
input and output sides as well.

llvm-svn: 203229
parent f0e88c72
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