Add GraphTraits and DOTGraphTraits for CFGFunction in debug builds.

Enable using GraphWriter to dump graphviz in debug mode (kept to debug builds completely as this is only for debugging). Add option to mlir-opt to print CFGFunction after every transform in debug mode.

PiperOrigin-RevId: 211578699
4 files changed
tree: 3501316a0cdb4e646c480d93c7112cf8314b7444
  1. include/
  2. lib/
  3. test/
  4. tools/
  5. utils/
  6. .clang-format
  7. LICENSE.TXT