All DSGraphs keep a reference to the targetdata they are created with. This is

All DSGraphs keep a reference to the targetdata they are created with.  This is
used to eliminate the hard coded, hacked in, sparc specific, global TargetData.
Changing the TargetData used to actually match the code fixes problems, and
eliminates a crash.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9659 91177308-0d34-0410-b5e6-96231b3b80d8