Commit Graph

1 Commits

Author SHA1 Message Date
Nadav Rotem 018921002e Add a dagcombine optimization to convert concat_vectors of undefs into a single undef.
The unoptimized concat_vectors isd prevented the canonicalization of the vector_shuffle node.

llvm-svn: 160221
2012-07-14 21:30:27 +00:00