[turbofan] Initialize less frequently used types in typer.cc lazily.

src/compiler/typer.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_TYPER_H_
 #define V8_COMPILER_TYPER_H_
 
 #include "src/v8.h"
 
 #include "src/compiler/graph.h"
 #include "src/compiler/opcodes.h"
 #include "src/types.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
+struct LazyTypeCache;
+
 class Typer {
  public:
   explicit Typer(Graph* graph, MaybeHandle<Context> context);
   ~Typer();
 
   void Run();
 
   Graph* graph() { return graph_; }
   MaybeHandle<Context> context() { return context_; }
   Zone* zone() { return graph_->zone(); }
@@ skipping 25 matching lines @@
   Type* integer;
   Type* weakint;
   Type* signed8_;
   Type* unsigned8_;
   Type* signed16_;
   Type* unsigned16_;
   Type* number_fun0_;
   Type* number_fun1_;
   Type* number_fun2_;
   Type* weakint_fun1_;
-  Type* imul_fun_;
-  Type* clz32_fun_;
   Type* random_fun_;
-  Type* array_buffer_fun_;
-  Type* int8_array_fun_;
-  Type* int16_array_fun_;
-  Type* int32_array_fun_;
-  Type* uint8_array_fun_;
-  Type* uint16_array_fun_;
-  Type* uint32_array_fun_;
-  Type* float32_array_fun_;
-  Type* float64_array_fun_;
+  LazyTypeCache* cache_;
 
   ZoneVector<Handle<Object> > weaken_min_limits_;
   ZoneVector<Handle<Object> > weaken_max_limits_;
   DISALLOW_COPY_AND_ASSIGN(Typer);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_TYPER_H_