Save 100-300 KB footprint by not force inlining HashTable functions

Source/wtf/HashTable.cpp

Index: Source/wtf/HashTable.cpp
diff --git a/Source/wtf/HashTable.cpp b/Source/wtf/HashTable.cpp
index 518a4c8c24ae5cda1fb0c6769ef604bf193dd7c1..5bcc370a51ecbeca6a708b5a61a8fa45b147522c 100644
--- a/Source/wtf/HashTable.cpp
+++ b/Source/wtf/HashTable.cpp
@@ -65,4 +65,81 @@ void HashTableStats::dumpStats()
 
 #endif
 
+// integer hash function
+
+// Thomas Wang's 32 Bit Mix Function: http://www.cris.com/~Ttwang/tech/inthash.htm
+unsigned intHash(uint8_t key8)
+{
+    unsigned key = key8;
+    key += ~(key << 15);
+    key ^= (key >> 10);
+    key += (key << 3);
+    key ^= (key >> 6);
+    key += ~(key << 11);
+    key ^= (key >> 16);
+    return key;
+}
+
+// Thomas Wang's 32 Bit Mix Function: http://www.cris.com/~Ttwang/tech/inthash.htm
+unsigned intHash(uint16_t key16)
+{
+    unsigned key = key16;
+    key += ~(key << 15);
+    key ^= (key >> 10);
+    key += (key << 3);
+    key ^= (key >> 6);
+    key += ~(key << 11);
+    key ^= (key >> 16);
+    return key;
+}
+
+// Thomas Wang's 32 Bit Mix Function: http://www.cris.com/~Ttwang/tech/inthash.htm
+unsigned intHash(uint32_t key)
+{
+    key += ~(key << 15);
+    key ^= (key >> 10);
+    key += (key << 3);
+    key ^= (key >> 6);
+    key += ~(key << 11);
+    key ^= (key >> 16);
+    return key;
+}
+
+// Thomas Wang's 64 bit Mix Function: http://www.cris.com/~Ttwang/tech/inthash.htm
+unsigned intHash(uint64_t key)
+{
+    key += ~(key << 32);
+    key ^= (key >> 22);
+    key += ~(key << 13);
+    key ^= (key >> 8);
+    key += (key << 3);
+    key ^= (key >> 15);
+    key += ~(key << 27);
+    key ^= (key >> 31);
+    return static_cast<unsigned>(key);
+}
+
+// Compound integer hash method: http://opendatastructures.org/versions/edition-0.1d/ods-java/node33.html#SECTION00832000000000000000
+unsigned pairIntHash(unsigned key1, unsigned key2)
+{
+    unsigned shortRandom1 = 277951225; // A random 32-bit value.
+    unsigned shortRandom2 = 95187966; // A random 32-bit value.
+    uint64_t longRandom = 19248658165952622LL; // A random 64-bit value.
+
+    uint64_t product = longRandom * (shortRandom1 * key1 + shortRandom2 * key2);
+    unsigned highBits = static_cast<unsigned>(product >> (sizeof(uint64_t) - sizeof(unsigned)));
+    return highBits;
+}
+
+// Custom secondary hash function.
+unsigned doubleHash(unsigned key)
+{
+    key = ~key + (key >> 23);
+    key ^= (key << 12);
+    key ^= (key >> 7);
+    key ^= (key << 2);
+    key ^= (key >> 20);
+    return key;
+}
+
 } // namespace WTF