[turbofan] Cache float32 constants on the JSGraph level.

src/compiler/common-node-cache.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_COMMON_NODE_CACHE_H_
 #define V8_COMPILER_COMMON_NODE_CACHE_H_
 
-#include "src/assembler.h"
 #include "src/compiler/node-cache.h"
 
 namespace v8 {
 namespace internal {
+
+// Forward declarations.
+class ExternalReference;
+
+
 namespace compiler {
 
 // Bundles various caches for common nodes.
-class CommonNodeCache FINAL : public ZoneObject {
+class CommonNodeCache FINAL {
  public:
   explicit CommonNodeCache(Zone* zone) : zone_(zone) {}
+  ~CommonNodeCache() {}
 
   Node** FindInt32Constant(int32_t value) {
-    return int32_constants_.Find(zone_, value);
+    return int32_constants_.Find(zone(), value);
   }
 
   Node** FindInt64Constant(int64_t value) {
-    return int64_constants_.Find(zone_, value);
+    return int64_constants_.Find(zone(), value);
+  }
+
+  Node** FindFloat32Constant(float value) {
+    // We canonicalize float constants at the bit representation level.
+    return float32_constants_.Find(zone(), bit_cast<int32_t>(value));
   }
 
   Node** FindFloat64Constant(double value) {
     // We canonicalize double constants at the bit representation level.
-    return float64_constants_.Find(zone_, bit_cast<int64_t>(value));
+    return float64_constants_.Find(zone(), bit_cast<int64_t>(value));
   }
 
-  Node** FindExternalConstant(ExternalReference reference) {
-    return external_constants_.Find(zone_, reference.address());
-  }
+  Node** FindExternalConstant(ExternalReference value);
 
   Node** FindNumberConstant(double value) {
     // We canonicalize double constants at the bit representation level.
-    return number_constants_.Find(zone_, bit_cast<int64_t>(value));
+    return number_constants_.Find(zone(), bit_cast<int64_t>(value));
   }
 
+  // Return all nodes from the cache.
+  void GetCachedNodes(ZoneVector<Node*>* nodes);
+
   Zone* zone() const { return zone_; }
 
-  void GetCachedNodes(NodeVector* nodes) {
-    int32_constants_.GetCachedNodes(nodes);
-    int64_constants_.GetCachedNodes(nodes);
-    float64_constants_.GetCachedNodes(nodes);
-    external_constants_.GetCachedNodes(nodes);
-    number_constants_.GetCachedNodes(nodes);
-  }
-
  private:
   Int32NodeCache int32_constants_;
   Int64NodeCache int64_constants_;
+  Int32NodeCache float32_constants_;
   Int64NodeCache float64_constants_;
-  PtrNodeCache external_constants_;
+  IntPtrNodeCache external_constants_;
   Int64NodeCache number_constants_;
   Zone* zone_;
+
+  DISALLOW_COPY_AND_ASSIGN(CommonNodeCache);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_COMMON_NODE_CACHE_H_