Reuse arena memory for each block in scheduler.

This reduces the peak memory used for large methods with
multiple blocks to schedule.

Compiling the aosp_taimen-userdebug boot image, the most
memory hungry method BatteryStats.dumpLocked has the
Scheduler memory allocations in ArenaStack hidden by the
register allocator:
  - before:
    MEM: used: 8300224, allocated: 9175040, lost: 197360
    Scheduler       8300224
  - after:
    MEM: used: 5914296, allocated: 7864320, lost: 78200
    SsaLiveness     5532840
    RegAllocator     144968
    RegAllocVldt     236488
The total arena memory used, including the ArenaAllocator
not listed above, goes from 44333648 to 41950324 (-5.4%).
(Measured with kArenaAllocatorCountAllocations=true,
kArenaAllocatorPreciseTracking=false.)

Also remove one unnecessary -Wframe-larger-than= workaround
and add one workaround for large frame with the above arena
alloc tracking flags.

Test: m test-art-host-gtest
Test: testrunner.py --host
Bug: 34053922
Change-Id: I7fd8d90dcc13b184b1e5bd0bcac072388710a129

1 files changed, 2 insertions, 3 deletions

diff --git a/compiler/optimizing/scheduler_arm.h b/compiler/optimizing/scheduler_arm.h
index 0cb8684376..2f369486b3 100644
--- a/compiler/optimizing/scheduler_arm.h
+++ b/compiler/optimizing/scheduler_arm.h
@@ -137,10 +137,9 @@ class SchedulingLatencyVisitorARM : public SchedulingLatencyVisitor {
 
 class HSchedulerARM : public HScheduler {
  public:
-  HSchedulerARM(ScopedArenaAllocator* allocator,
-                SchedulingNodeSelector* selector,
+  HSchedulerARM(SchedulingNodeSelector* selector,
                 SchedulingLatencyVisitorARM* arm_latency_visitor)
-      : HScheduler(allocator, arm_latency_visitor, selector) {}
+      : HScheduler(arm_latency_visitor, selector) {}
   ~HSchedulerARM() OVERRIDE {}
 
   bool IsSchedulable(const HInstruction* instruction) const OVERRIDE {