Adapt Danno's Track Allocation Info idea to fast literals. When allocating a literal array,

src/arm/codegen-arm.cc

Index: src/arm/codegen-arm.cc
diff --git a/src/arm/codegen-arm.cc b/src/arm/codegen-arm.cc
index 3f1791c394efd50fcf7a15b56215182d9b8ae3ac..9d008232e356871e9a0aac2b49ebebf10b41fbd2 100644
--- a/src/arm/codegen-arm.cc
+++ b/src/arm/codegen-arm.cc
@@ -179,6 +179,10 @@ void ElementsTransitionGenerator::GenerateSmiToDouble(
   Label loop, entry, convert_hole, gc_required, only_change_map, done;
   bool vfp2_supported = CpuFeatures::IsSupported(VFP2);
 
+  if (FLAG_track_allocation_sites) {
+    masm->TestJSArrayForAllocationSiteInfo(r2, r4, fail);
+  }
+
   // Check for empty arrays, which only require a map transition and no changes
   // to the backing store.
   __ ldr(r4, FieldMemOperand(r2, JSObject::kElementsOffset));