convert compile-time checkable DCHECKs to STATIC_ASSERTs

src/code-stubs-hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/bailout-reason.h"
 #include "src/code-stubs.h"
 #include "src/field-index.h"
 #include "src/hydrogen.h"
@@ skipping 684 matching lines @@
     IfBuilder is_valid(this);
     is_valid.IfNot<HCompareObjectEqAndBranch>(mapped_index,
                                               graph()->GetConstantHole());
     is_valid.Then();
     {
       // TODO(mvstanton): I'd like to assert from this point, that if the
       // mapped_index is not the hole that it is indeed, a smi. An unnecessary
       // smi check is being emitted.
       HValue* the_context = Add<HLoadKeyed>(elements, graph()->GetConstant0(),
                                             nullptr, FAST_ELEMENTS);
-      DCHECK(Context::kHeaderSize == FixedArray::kHeaderSize);
+      STATIC_ASSERT(Context::kHeaderSize == FixedArray::kHeaderSize);
       HValue* result = Add<HLoadKeyed>(the_context, mapped_index, nullptr,
                                        FAST_ELEMENTS, ALLOW_RETURN_HOLE);
       environment()->Push(result);
     }
     is_valid.Else();
     {
       HValue* result = UnmappedCase(elements, key);
       environment()->Push(result);
     }
     is_valid.End();
@@ skipping 1496 matching lines @@
   // megamorphic case is handled as part of the default stub.
   DCHECK(!FLAG_vector_ics);
 
   // Probe the stub cache.
   Add<HTailCallThroughMegamorphicCache>(receiver, name);
 
   // We never continue.
   return graph()->GetConstant0();
 }
 } }  // namespace v8::internal