tree bf0c4b39d2d831774d5ec7b7a182a2c29fb3c3f9
parent 03809ccd5d139cbf311352d56801a90a6c48509d
author Nadav Rotem <nadav.rotem@intel.com> 1319923384 +0000
committer Copybara-Service <copybara-worker@google.com> 1601211050 -0700

Add a new DAGCombine optimization for BUILD_VECTOR.
If all of the inputs are zero/any_extended, create a new simple BV
which can be further optimized by other BV optimizations.

llvm-svn: 143297
GitOrigin-RevId: bf6568b5d6698d160d2108376debef084ad0ccab