[CodeGen] Add iterator_range for the MVT::SimpleValueType enum.

This commit adds a simple iterator over that enum, and a few
functions to create iterator ranges over the most common types.

Differential Revision: http://reviews.llvm.org/D6537


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225387 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed