CallIC customization stubs must accept that a vector slot is cleared.

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index de285bb2f1a0d575ee30b37404af0e6b8e9a1616..28f5843872355347bda357829200760b5b377387 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -2966,9 +2966,14 @@ void CallIC_ArrayStub::Generate(MacroAssembler* masm) {
 
   __ mov(r0, Operand(arg_count()));
   __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3));
-  __ ldr(r2, FieldMemOperand(r4, FixedArray::kHeaderSize));
-  // Verify that r2 contains an AllocationSite
-  __ AssertUndefinedOrAllocationSite(r2, r4);
+  __ ldr(r4, FieldMemOperand(r4, FixedArray::kHeaderSize));
+
+  // Verify that r4 contains an AllocationSite
+  __ ldr(r5, FieldMemOperand(r4, AllocationSite::kMapOffset));

[Toon Verwaest, 2014/07/28 14:11:38]

HeapObject::kMapOffset?

+  __ CompareRoot(r5, Heap::kAllocationSiteMapRootIndex);
+  __ b(ne, &miss);
+
+  __ mov(r2, r4);
   ArrayConstructorStub stub(masm->isolate(), arg_count());
   __ TailCallStub(&stub);