Total bytes of diff: -21971 (-0.07% of base)
3075 total methods with Code Size differences (1589 improved, 1486 regressed), 184523 unchanged.

Note: it improves code with retyping as well:
808 total methods with Code Size differences (808 improved, 0 regressed), 186790 unchanged.
Found 55 files with textual diffs.
Crossgen CodeSize Diffs for System.Private.CoreLib.dll, framework assemblies for  default jit
Summary of Code Size diffs:
(Lower is better)
Total bytes of diff: -22923 (-0.07% of base)

…ss taken when possible.

Protect against a promoted struct with a hole like struct<8> {hole 4; int a;};