Fix Cluster Fuzz stack frame corruption bug.

src/x64/code-stubs-x64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3550 matching lines @@
   // Make sure the function is the Array() function
   __ LoadArrayFunction(rcx);
   __ cmpq(rdi, rcx);
   __ j(not_equal, &not_array_function);
 
   // The target function is the Array constructor,
   // Create an AllocationSite if we don't already have it, store it in the cell
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
 
+    __ Integer32ToSmi(rax, rax);
     __ push(rax);
     __ push(rdi);
     __ push(rbx);
 
     CreateAllocationSiteStub create_stub;
     __ CallStub(&create_stub);
 
     __ pop(rbx);
     __ pop(rdi);
     __ pop(rax);
+    __ SmiToInteger32(rax, rax);
   }
   __ jmp(&done);
 
   __ bind(&not_array_function);
   __ movq(FieldOperand(rbx, Cell::kValueOffset), rdi);
   // No need for a write barrier here - cells are rescanned.
 
   __ bind(&done);
 }
 
@@ skipping 3209 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64