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
9 files changed
