Use ScopedArenaAllocator for register allocation.

Memory needed to compile the two most expensive methods for
aosp_angler-userdebug boot image:
  BatteryStats.dumpCheckinLocked() : 25.1MiB -> 21.1MiB
  BatteryStats.dumpLocked(): 49.6MiB -> 42.0MiB
This is because all the memory previously used by Scheduler
is reused by the register allocator; the register allocator
has a higher peak usage of the ArenaStack.

And continue the "arena"->"allocator" renaming.

Test: m test-art-host-gtest
Test: testrunner.py --host
Bug: 64312607
Change-Id: Idfd79a9901552b5147ec0bf591cb38120de86b01

1 files changed, 2 insertions, 2 deletions

diff --git a/compiler/optimizing/scheduler_arm.h b/compiler/optimizing/scheduler_arm.h
index 62cd75cf59..0cb8684376 100644
--- a/compiler/optimizing/scheduler_arm.h
+++ b/compiler/optimizing/scheduler_arm.h
@@ -137,10 +137,10 @@ class SchedulingLatencyVisitorARM : public SchedulingLatencyVisitor {
 
 class HSchedulerARM : public HScheduler {
  public:
-  HSchedulerARM(ScopedArenaAllocator* arena,
+  HSchedulerARM(ScopedArenaAllocator* allocator,
                 SchedulingNodeSelector* selector,
                 SchedulingLatencyVisitorARM* arm_latency_visitor)
-      : HScheduler(arena, arm_latency_visitor, selector) {}
+      : HScheduler(allocator, arm_latency_visitor, selector) {}
   ~HSchedulerARM() OVERRIDE {}
 
   bool IsSchedulable(const HInstruction* instruction) const OVERRIDE {