Compiler: replace DOM traversal computation
Originally the old trace JIT used a few recursive graph walking
algorithms - which was perfectly reasonable given that the graph
size was capped at a few dozen nodes at most. These were replaced
with iterative walk order computations - or at least I thought
they all were. Missed one of them, which caused a stack overflow
on a pathologically large method compilation.
Renaming of some arena_allocator items for consistency and clarity.
More detailed memory usage logging. Reworked the allocator to waste
less space when an allocation doesn't fit and a new block must be
14 files changed