Additional work to get array literal allocation tracking working, even with --always-opt

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 6a97201235876bd2fb80824cac2d6683128401d1..efe7ae659d3ae234afad644ebeffcebea118f2f4 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -1719,7 +1719,9 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   if (has_fast_elements && constant_elements_values->map() ==
       isolate()->heap()->fixed_cow_array_map()) {
     FastCloneShallowArrayStub stub(
-        FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS, length);
+        FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS,
+        DONT_TRACK_ALLOCATION_SITE_INFO,
+        length);
     __ CallStub(&stub);
     __ IncrementCounter(
         isolate()->counters()->cow_arrays_created_stub(), 1, r1, r2);
@@ -1730,19 +1732,17 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   } else {
     ASSERT(IsFastSmiOrObjectElementsKind(constant_elements_kind) ||
            FLAG_smi_only_arrays);
-    FastCloneShallowArrayStub::Mode mode = has_fast_elements
-      ? FastCloneShallowArrayStub::CLONE_ELEMENTS
-      : FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS;
-
-    // Tracking allocation info allows us to pre-transition later if it makes
-    // sense.
-    if (mode == FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS &&
-        FLAG_track_allocation_sites) {
-      mode = FastCloneShallowArrayStub::
-          CLONE_ANY_ELEMENTS_WITH_ALLOCATION_SITE_INFO;
+    FastCloneShallowArrayStub::Mode mode =
+        FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS;
+    AllocationSiteInfoMode allocation_site_info_mode =
+        AllocationSiteInfo::GetMode();
+
+    if (has_fast_elements) {
+      mode = FastCloneShallowArrayStub::CLONE_ELEMENTS;
+      allocation_site_info_mode = DONT_TRACK_ALLOCATION_SITE_INFO;
     }
 
-    FastCloneShallowArrayStub stub(mode, length);
+    FastCloneShallowArrayStub stub(mode, allocation_site_info_mode, length);
     __ CallStub(&stub);
   }