[DAG]  Allow merging of stores of vector loads

Remove restriction disallowing merging of stores vector loads into
larger store of larger vector load.

Reviewers: RKSimon, efriedma, spatel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D36158

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309951 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed