Some optimizations for the array alloc path.
- Force Array::Alloc() to be inlined.
- Simplify the array size overflow check.
- Turn fill_usable into a template parameter.
- Remove a branch in Array::DataOffset() and avoid
Primitive::ComponentSize(), which has a switch, in the array alloc
path.
- Strength reductions in the array size computation by using component
size shifts instead of component sizes. Store component size shift
in the upper 16 bits of primitive_type field.
- Speedup: ~4% (3435->3284) in MemAllocTest on N4.
Bug: 9986565
Change-Id: I4b142ffac4ab8b5b915836f1660a949d6442344c
diff --git a/runtime/debugger.cc b/runtime/debugger.cc
index a9c4b4a..5729ad8 100644
--- a/runtime/debugger.cc
+++ b/runtime/debugger.cc
@@ -1422,7 +1422,7 @@
return error;
}
*new_array = gRegistry->Add(mirror::Array::Alloc<true>(Thread::Current(), c, length,
- c->GetComponentSize(),
+ c->GetComponentSizeShift(),
Runtime::Current()->GetHeap()->GetCurrentAllocator()));
return JDWP::ERR_NONE;
}