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

runtime/vm/intrinsifier_arm64.cc

Index: runtime/vm/intrinsifier_arm64.cc
diff --git a/runtime/vm/intrinsifier_arm64.cc b/runtime/vm/intrinsifier_arm64.cc
index fbaa1677dc0c268fd8c7d4c89f60c0d8fd6e5c76..c60cdac21792708b4d3a41399e41b63fbe7b8b60 100644
--- a/runtime/vm/intrinsifier_arm64.cc
+++ b/runtime/vm/intrinsifier_arm64.cc
@@ -183,7 +183,7 @@ static int GetScaleFactor(intptr_t size) {
 #define TYPED_ARRAY_ALLOCATION(type_name, cid, max_len, scale_shift)           \
   Label fall_through;                                                          \
   const intptr_t kArrayLengthStackOffset = 0 * kWordSize;                      \
-  __ MaybeTraceAllocation(cid, R2, &fall_through);                             \
+  NOT_IN_PRODUCT(__ MaybeTraceAllocation(cid, R2, &fall_through));             \
   __ ldr(R2, Address(SP, kArrayLengthStackOffset));  /* Array length. */       \
   /* Check that length is a positive Smi. */                                   \
   /* R2: requested array length argument. */                                   \
@@ -221,7 +221,7 @@ static int GetScaleFactor(intptr_t size) {
   /* next object start and initialize the object. */                           \
   __ str(R1, Address(R3, Heap::TopOffset(space)));                             \
   __ AddImmediate(R0, R0, kHeapObjectTag);                                     \
-  __ UpdateAllocationStatsWithSize(cid, R2, space);                            \
+  NOT_IN_PRODUCT(__ UpdateAllocationStatsWithSize(cid, R2, space));            \
   /* Initialize the tags. */                                                   \
   /* R0: new object start as a tagged pointer. */                              \
   /* R1: new object end address. */                                            \
@@ -1907,7 +1907,7 @@ static void TryAllocateOnebyteString(Assembler* assembler,
                                      Label* failure) {
   const Register length_reg = R2;
   Label fail;
-  __ MaybeTraceAllocation(kOneByteStringCid, R0, failure);
+  NOT_IN_PRODUCT(__ MaybeTraceAllocation(kOneByteStringCid, R0, failure));
   __ mov(R6, length_reg);  // Save the length register.
   // TODO(koda): Protect against negative length and overflow here.
   __ SmiUntag(length_reg);
@@ -1937,7 +1937,7 @@ static void TryAllocateOnebyteString(Assembler* assembler,
   // next object start and initialize the object.
   __ str(R1, Address(R3, Heap::TopOffset(space)));
   __ AddImmediate(R0, R0, kHeapObjectTag);
-  __ UpdateAllocationStatsWithSize(cid, R2, space);
+  NOT_IN_PRODUCT(__ UpdateAllocationStatsWithSize(cid, R2, space));
 
   // Initialize the tags.
   // R0: new object start as a tagged pointer.