tree 8a7f14ce3c6c087955ad5fe91a3ce7d5b5a82461
parent 98a8a542f95e41c09d214a329a940b270f08f5b3
author Nicolas Geoffray <ngeoffray@google.com> 1399907462 +0100
committer Nicolas Geoffray <ngeoffray@google.com> 1399968374 +0100

Add loop recognition and CFG simplifications in new compiler.

We do three simplifications:
- Split critical edges, for code generation from SSA (new).
- Ensure one back edge per loop, to simplify loop recognition (new).
- Ensure only one pre header for a loop, to simplify SSA creation (existing).

Change-Id: I9bfccd4b236a00486a261078627b091c8a68be33