Allow derived DOTViewers to choose the functions to illustrate

Instead of always showing/printing all functions, a class derived from
the DOTViewer class can overwrite the set of functions that will be
processed.

This will be used (and tested) by Polly's scop viewers, but other users
can be imagined as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243881 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed