Remove duplicate code / reuse right utilities from memref-dep-check / loop-tile

- use addBoundsForForStmt
- getLoopIVs can return a vector of ForStmt * instead of const ForStmt *; the
  returned things aren't owned / part of the stmt on which it's being called.
- other minor API cleanup

PiperOrigin-RevId: 225774301
6 files changed
tree: 9a7efaeb90640d60d035cfbee1367d1c041e2360
  1. g3doc/
  2. include/
  3. lib/
  4. test/
  5. tools/
  6. utils/
  7. .clang-format
  8. LICENSE.TXT