Commit Graph

2 Commits

Author SHA1 Message Date
Sanjay Patel 8b1fb3daba [InstCombine] add tests to show potential vector IR shuffle transforms
llvm-svn: 254342
2015-11-30 22:39:36 +00:00
Tim Northover fad2761ca0 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
2014-03-07 10:24:44 +00:00