Avoid building data structures we don't really need.  This improves the runtime
of a test that Bill Wendling sent me from 228.5s to 105s.  Obviously there is
more improvement to be had, but this is a nice speedup which should be "felt"
by many programs.

llvm-svn: 8962
1 file changed
tree: 8893bc85bf65d5c30342a1858a0d5128bcc64253
  1. llvm/