[Debug info] Transfer DI to fragment expressions for split integer values.

This patch teaches the SDag type legalizer how to split up debug info for
integer values that are split into a hi and lo part.

Differential Revision: https://reviews.llvm.org/D36805



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311102 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed