[compiler] Remove compiler internals from CodeAssembler.

src/code-stub-assembler.cc

 // Copyright 2016 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/code-stub-assembler.h"
 #include "src/code-factory.h"
 #include "src/frames-inl.h"
 #include "src/frames.h"
 #include "src/ic/handler-configuration.h"
 #include "src/ic/stub-cache.h"
@@ skipping 260 matching lines @@
   }
 
   Bind(&return_minus_x);
   var_x.Bind(Float64Neg(var_x.value()));
   Goto(&return_x);
 
   Bind(&return_x);
   return var_x.value();
 }
 
+Node* CodeStubAssembler::SmiShiftBitsConstant() {
+  return IntPtrConstant(kSmiShiftSize + kSmiTagSize);
+}
+
 Node* CodeStubAssembler::SmiFromWord32(Node* value) {
   value = ChangeInt32ToIntPtr(value);
   return WordShl(value, SmiShiftBitsConstant());
 }
 
 Node* CodeStubAssembler::SmiTag(Node* value) {
   int32_t constant_value;
   if (ToInt32Constant(value, constant_value) && Smi::IsValid(constant_value)) {
     return SmiConstant(Smi::FromInt(constant_value));
   }
@@ skipping 3702 matching lines @@
     Node* enum_length = EnumLength(current_map.value());
     Node* zero_constant = SmiConstant(Smi::FromInt(0));
     BranchIf(WordEqual(enum_length, zero_constant), &loop, use_runtime);
   }
 }
 
 Node* CodeStubAssembler::CreateWeakCellInFeedbackVector(Node* feedback_vector,
                                                         Node* slot,
                                                         Node* value) {
   Node* size = IntPtrConstant(WeakCell::kSize);
-  Node* cell = Allocate(size, compiler::CodeAssembler::kPretenured);
+  Node* cell = Allocate(size, CodeStubAssembler::kPretenured);
 
   // Initialize the WeakCell.
   StoreObjectFieldRoot(cell, WeakCell::kMapOffset, Heap::kWeakCellMapRootIndex);
   StoreObjectField(cell, WeakCell::kValueOffset, value);
   StoreObjectFieldRoot(cell, WeakCell::kNextOffset,
                        Heap::kTheHoleValueRootIndex);
 
   // Store the WeakCell in the feedback vector.
   StoreFixedArrayElement(feedback_vector, slot, cell, UPDATE_WRITE_BARRIER,
                          CodeStubAssembler::SMI_PARAMETERS);
   return cell;
 }
 
 }  // namespace internal
 }  // namespace v8