[SelectionDAG]  Add an assert in getNode() for EXTRACT_VECTOR_ELT.

When getNode() is called to create an EXTRACT_VECTOR_ELT, assert that
the result VT is at least as wide as the vector element type.

Review: Eli Friedman

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@324061 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed