Optimizing: Reorder fields in `LiveInterval`.

Move `type_` before `register_` to avoid padding and reduce
`sizeof(LiveInterval)` on 64-bit architectures.

Move two pointer fields from the end of the data before the
`type_`. Keeping pointer fields together can avoid padding
if fields are added/removed in the future.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 181943478
Flag: EXEMPT refactor
Change-Id: Ic12526bd9459f4954d3096c487a593cf3ae0528b
1 file changed