Revert "Preserve DebugInfo when replacing values in DAGCombiner"

Reverting due to assertion failure in
lib/CodeGen/SelectionDAG/InstrEmitter.cpp

This reverts commit r272792.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272799 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed