VM: Don't generate allocation stats code in product mode.

runtime/vm/assembler_arm64.cc

Index: runtime/vm/assembler_arm64.cc
diff --git a/runtime/vm/assembler_arm64.cc b/runtime/vm/assembler_arm64.cc
index 9832dae6d621bddc1cf8eb30672d3522c3a86fb8..100d02a7cc2b108f122af6949b2e18c52aefd02e 100644
--- a/runtime/vm/assembler_arm64.cc
+++ b/runtime/vm/assembler_arm64.cc
@@ -1354,7 +1354,7 @@ void Assembler::TryAllocate(const Class& cls,
     // If this allocation is traced, program will jump to failure path
     // (i.e. the allocation stub) which will allocate the object and trace the
     // allocation call site.
-    MaybeTraceAllocation(cls.id(), temp_reg, failure);
+    NOT_IN_PRODUCT(MaybeTraceAllocation(cls.id(), temp_reg, failure));
     const intptr_t instance_size = cls.instance_size();
     Heap::Space space = Heap::SpaceForAllocation(cls.id());
     ldr(temp_reg, Address(THR, Thread::heap_offset()));
@@ -1375,7 +1375,7 @@ void Assembler::TryAllocate(const Class& cls,
     ASSERT(instance_size >= kHeapObjectTag);
     AddImmediate(
         instance_reg, instance_reg, -instance_size + kHeapObjectTag);
-    UpdateAllocationStats(cls.id(), space);
+    NOT_IN_PRODUCT(UpdateAllocationStats(cls.id(), space));
 
     uword tags = 0;
     tags = RawObject::SizeTag::update(instance_size, tags);
@@ -1400,7 +1400,7 @@ void Assembler::TryAllocateArray(intptr_t cid,
     // If this allocation is traced, program will jump to failure path
     // (i.e. the allocation stub) which will allocate the object and trace the
     // allocation call site.
-    MaybeTraceAllocation(cid, temp1, failure);
+    NOT_IN_PRODUCT(MaybeTraceAllocation(cid, temp1, failure));
     Heap::Space space = Heap::SpaceForAllocation(cid);
     ldr(temp1, Address(THR, Thread::heap_offset()));
     // Potential new object start.
@@ -1420,7 +1420,7 @@ void Assembler::TryAllocateArray(intptr_t cid,
     str(end_address, Address(temp1, Heap::TopOffset(space)));
     add(instance, instance, Operand(kHeapObjectTag));
     LoadImmediate(temp2, instance_size);
-    UpdateAllocationStatsWithSize(cid, temp2, space);
+    NOT_IN_PRODUCT(UpdateAllocationStatsWithSize(cid, temp2, space));
 
     // Initialize the tags.
     // instance: new object start as a tagged pointer.