[turbofan] Remove bogus constant materialization from frame.

src/compiler/code-generator.h

 // Copyright 2014 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.
 
 #ifndef V8_COMPILER_CODE_GENERATOR_H_
 #define V8_COMPILER_CODE_GENERATOR_H_
 
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/unwinding-info-writer.h"
@@ skipping 68 matching lines @@
   void FinishFrame(Frame* frame);
 
   // Checks if {block} will appear directly after {current_block_} when
   // assembling code, in which case, a fall-through can be used.
   bool IsNextInAssemblyOrder(RpoNumber block) const;
 
   // Record a safepoint with the given pointer map.
   void RecordSafepoint(ReferenceMap* references, Safepoint::Kind kind,
                        int arguments, Safepoint::DeoptMode deopt_mode);
 
-  // Check if a heap object can be materialized by loading from the frame, which
-  // is usually way cheaper than materializing the actual heap object constant.
-  bool IsMaterializableFromFrame(Handle<HeapObject> object, int* slot_return);
   // Check if a heap object can be materialized by loading from a heap root,
   // which is cheaper on some platforms than materializing the actual heap
   // object constant.
   bool IsMaterializableFromRoot(Handle<HeapObject> object,
                                 Heap::RootListIndex* index_return);
 
   enum CodeGenResult { kSuccess, kTooManyDeoptimizationBailouts };
 
   // Assemble instructions for the specified block.
   CodeGenResult AssembleBlock(const InstructionBlock* block);
@@ skipping 180 matching lines @@
   OutOfLineCode* ools_;
   int osr_pc_offset_;
   SourcePositionTableBuilder source_position_table_builder_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_H