[turbofan] Robust node caching for relocatable int{32|64}

src/compiler/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_NODE_CACHE_H_
 #define V8_COMPILER_NODE_CACHE_H_
 
 #include "src/base/functional.h"
 #include "src/base/macros.h"
 
@@ skipping 45 matching lines @@
   Pred pred_;
 
   bool Resize(Zone* zone);
 
   DISALLOW_COPY_AND_ASSIGN(NodeCache);
 };
 
 // Various default cache types.
 typedef NodeCache<int32_t> Int32NodeCache;
 typedef NodeCache<int64_t> Int64NodeCache;
+
+// All we want is the numeric value of the RelocInfo::Mode enum. We typedef
+// below to avoid pulling in assembler.h
+typedef char RelocInfoMode;
+typedef std::pair<int32_t, RelocInfoMode> RelocInt32Key;
+typedef std::pair<int64_t, RelocInfoMode> RelocInt64Key;
+typedef NodeCache<RelocInt32Key> RelocInt32NodeCache;
+typedef NodeCache<RelocInt64Key> RelocInt64NodeCache;
 #if V8_HOST_ARCH_32_BIT
 typedef Int32NodeCache IntPtrNodeCache;
 #else
 typedef Int64NodeCache IntPtrNodeCache;
 #endif
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_NODE_CACHE_H_