tree a170276eabf319d107242f928a68463fe0b5ebfb
parent 66aee5cd571cf4739d2735769304202ea5051fb8
author Mathieu Chartier <mathieuc@google.com> 1343844014 -0700
committer Mathieu Chartier <mathieuc@google.com> 1345223210 -0700

Sticky mark bits "generational" GC

Sticky mark bits GC. Sticky mark bits implemented using allocation stack which enables us to use the previous GC live bitmap as the mark bitmap.

Removed heap_end_ since checking versus it caused more overhead than it saved.

Removed check for impossible allocations at the start of AllocObject since these allocations will just fall through and fail anyways.
These allocations do not happen often enough for it to be worth checking for.

A bunch of constant optimization performance improvements.

Pre locking regression benchmark improvements:
Deltablue: ~0.3 sec runtime.
CaffeineMark: ~300 total score due to improved string score.

Change-Id: I15016f1ae7fdf76fc3aadb5774b527bf802d9701