[PPC] Use VSX/FP Facility integer load when an integer load's only users are conversion to FP

http://reviews.llvm.org/D18405

When the integer value loaded is never used directly as integer we should use VSX 
or Floating Point Facility integer loads and avoid extra direct move



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265593 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed