[ConstantFold] Get the correct vector type when folding a getelementptr.

Differential Revision:  https://reviews.llvm.org/D26014

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285371 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed