Inline array constructor.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 941bb32affdfcc7dd5b0fc87829bf46d8429eb81..04a3b8ed99d6c35bac56995220d5b8722a691ed2 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -5763,9 +5763,9 @@ static void CreateArrayDispatchOneArgument(MacroAssembler* masm,
     }
 
     // Save the resulting elements kind in type info
-    __ SmiTag(edx);
-    __ mov(FieldOperand(ecx, AllocationSite::kTransitionInfoOffset), edx);
-    __ SmiUntag(edx);
+    STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0);
+    __ add(FieldOperand(ecx, AllocationSite::kTransitionInfoOffset),
+           Immediate(Smi::FromInt(kFastElementsKindPackedToHoley)));
 
     __ bind(&normal_sequence);
     int last_index = GetSequenceIndexFromFastElementsKind(
@@ -5906,8 +5906,11 @@ void ArrayConstructorStub::Generate(MacroAssembler* masm) {
       masm->isolate()->factory()->allocation_site_map()));
   __ j(not_equal, &no_info);
 
+  // Only look at the lower 16 bits of the transition info.
   __ mov(edx, FieldOperand(edx, AllocationSite::kTransitionInfoOffset));
   __ SmiUntag(edx);
+  STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0);
+  __ and_(edx, Immediate(AllocationSite::ElementsKindBits::kMask));
   GenerateDispatchToArrayStub(masm, DONT_OVERRIDE);
 
   __ bind(&no_info);