tree e548b6f20da6f770b543cc5dbe9a2c715e6027bd
parent c335d183cffdbe2f6041789bfcb7aad5148663c2
author Uday Bondhugula <bondhugula@google.com> 1533327746 -0700
committer jpienaar <jpienaar@google.com> 1553889319 -0700

Loop unrolling update.

- deal with non-operation stmt's (if/for stmt's) in loops being unrolled
  (unrolling of non-innermost loops works).
- update uses in unrolled bodies to use results of new operations that may be
  introduced in the unrolled bodies.

Unrolling now works for all kinds of loop nests - perfect nests, imperfect
nests, loops at any depth, and with any kind of operation in the body. (IfStmt
support not done, hence untested there).

Added missing dump/print method for StmtBlock.

TODO: add test case for outer loop unrolling.
PiperOrigin-RevId: 207314286