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Back out hashcode trimming #2

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@@ -130,7 +130,7 @@ class markWord {
static const int lock_bits = 2;
static const int biased_lock_bits = 1;
static const int max_hash_bits = BitsPerWord - age_bits - lock_bits - biased_lock_bits;
static const int hash_bits = max_hash_bits > 22 ? 22 : max_hash_bits;
static const int hash_bits = max_hash_bits > 31 ? 31 : max_hash_bits;
static const int unused_gap_bits = LP64_ONLY(1) NOT_LP64(0);
static const int epoch_bits = 2;