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      1 // Copyright 2014 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef V8_COMPILER_COMMON_NODE_CACHE_H_
      6 #define V8_COMPILER_COMMON_NODE_CACHE_H_
      7 
      8 #include "src/compiler/node-cache.h"
      9 
     10 namespace v8 {
     11 namespace internal {
     12 
     13 // Forward declarations.
     14 class ExternalReference;
     15 class HeapObject;
     16 template <typename>
     17 class Handle;
     18 
     19 
     20 namespace compiler {
     21 
     22 // Bundles various caches for common nodes.
     23 class CommonNodeCache final {
     24  public:
     25   explicit CommonNodeCache(Zone* zone) : zone_(zone) {}
     26   ~CommonNodeCache() {}
     27 
     28   Node** FindInt32Constant(int32_t value) {
     29     return int32_constants_.Find(zone(), value);
     30   }
     31 
     32   Node** FindInt64Constant(int64_t value) {
     33     return int64_constants_.Find(zone(), value);
     34   }
     35 
     36   Node** FindFloat32Constant(float value) {
     37     // We canonicalize float constants at the bit representation level.
     38     return float32_constants_.Find(zone(), bit_cast<int32_t>(value));
     39   }
     40 
     41   Node** FindFloat64Constant(double value) {
     42     // We canonicalize double constants at the bit representation level.
     43     return float64_constants_.Find(zone(), bit_cast<int64_t>(value));
     44   }
     45 
     46   Node** FindExternalConstant(ExternalReference value);
     47 
     48   Node** FindNumberConstant(double value) {
     49     // We canonicalize double constants at the bit representation level.
     50     return number_constants_.Find(zone(), bit_cast<int64_t>(value));
     51   }
     52 
     53   Node** FindHeapConstant(Handle<HeapObject> value);
     54 
     55   Node** FindRelocatableInt32Constant(int32_t value, RelocInfoMode rmode) {
     56     return relocatable_int32_constants_.Find(zone(),
     57                                              std::make_pair(value, rmode));
     58   }
     59 
     60   Node** FindRelocatableInt64Constant(int64_t value, RelocInfoMode rmode) {
     61     return relocatable_int64_constants_.Find(zone(),
     62                                              std::make_pair(value, rmode));
     63   }
     64 
     65   // Return all nodes from the cache.
     66   void GetCachedNodes(ZoneVector<Node*>* nodes);
     67 
     68   Zone* zone() const { return zone_; }
     69 
     70  private:
     71   Int32NodeCache int32_constants_;
     72   Int64NodeCache int64_constants_;
     73   Int32NodeCache float32_constants_;
     74   Int64NodeCache float64_constants_;
     75   IntPtrNodeCache external_constants_;
     76   Int64NodeCache number_constants_;
     77   IntPtrNodeCache heap_constants_;
     78   RelocInt32NodeCache relocatable_int32_constants_;
     79   RelocInt64NodeCache relocatable_int64_constants_;
     80   Zone* const zone_;
     81 
     82   DISALLOW_COPY_AND_ASSIGN(CommonNodeCache);
     83 };
     84 
     85 }  // namespace compiler
     86 }  // namespace internal
     87 }  // namespace v8
     88 
     89 #endif  // V8_COMPILER_COMMON_NODE_CACHE_H_
     90