Use ScopedArenaAllocator for code generation.

Reuse the memory previously allocated on the ArenaStack by
optimization passes.

This CL handles only the architecture-independent codegen
and slow paths, architecture-dependent codegen allocations
shall be moved to the ScopedArenaAllocator in a follow-up.

Memory needed to compile the two most expensive methods for
aosp_angler-userdebug boot image:
  BatteryStats.dumpCheckinLocked() : 19.6MiB -> 18.5MiB (-1189KiB)
  BatteryStats.dumpLocked(): 39.3MiB -> 37.0MiB (-2379KiB)

Also move definitions of functions that use bit_vector-inl.h
from bit_vector.h also to bit_vector-inl.h .

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 64312607
Change-Id: I84688c3a5a95bf90f56bd3a150bc31fedc95f29c

1 files changed, 4 insertions, 16 deletions

diff --git a/runtime/base/bit_vector.h b/runtime/base/bit_vector.h
index 56090672ce..564092a1a2 100644
--- a/runtime/base/bit_vector.h
+++ b/runtime/base/bit_vector.h
@@ -70,15 +70,8 @@ class BitVector {
     struct begin_tag { };
     struct end_tag { };
 
-    IndexIterator(const BitVector* bit_vector, begin_tag)
-      : bit_storage_(bit_vector->GetRawStorage()),
-        storage_size_(bit_vector->storage_size_),
-        bit_index_(FindIndex(0u)) { }
-
-    IndexIterator(const BitVector* bit_vector, end_tag)
-      : bit_storage_(bit_vector->GetRawStorage()),
-        storage_size_(bit_vector->storage_size_),
-        bit_index_(BitSize()) { }
+    IndexIterator(const BitVector* bit_vector, begin_tag);
+    IndexIterator(const BitVector* bit_vector, end_tag);
 
     uint32_t BitSize() const {
       return storage_size_ * kWordBits;
@@ -99,13 +92,8 @@ class BitVector {
    public:
     explicit IndexContainer(const BitVector* bit_vector) : bit_vector_(bit_vector) { }
 
-    IndexIterator begin() const {
-      return IndexIterator(bit_vector_, IndexIterator::begin_tag());
-    }
-
-    IndexIterator end() const {
-      return IndexIterator(bit_vector_, IndexIterator::end_tag());
-    }
+    IndexIterator begin() const;
+    IndexIterator end() const;
 
    private:
     const BitVector* const bit_vector_;