The patch do the following:
- Add instructions number generated by a solution to LSR cost
- Move LSR cost comparison to target part
- Add new cross use generation for ICmpZero that ends with zero
One LIT test fails. However it should be fixed when D26367 is committed.
Performance improvement on x86:
177.mesa on -O2 +3% 256.bzip2 on -Ofast -flto +1.5%