keyEquivalence = builder.getKeyEquivalence();
    this.entryHelper = entryHelper;

    int initialCapacity = Math.min(builder.getInitialCapacity(), MAXIMUM_CAPACITY);

    // Find power-of-two sizes best matching arguments. Constraints:
    // (segmentCount > concurrencyLevel)
    int segmentShift = 0;
    int segmentCount = 1;
    while (segmentCount < concurrencyLevel) {
      ++segmentShift;

(Move [7] dst src mem) =>
	(MOVBstore [6] dst (MOVBZload [6] src mem)
		(MOVHstore [4] dst (MOVHZload [4] src mem)
			(MOVWstore dst (MOVWZload src mem) mem)))

// MVC for other moves. Use up to 4 instructions (sizes up to 1024 bytes).
(Move [s] dst src mem) && s > 0 && s <= 256 && logLargeCopy(v, s) =>
	(MVC [makeValAndOff(int32(s), 0)] dst src mem)
(Move [s] dst src mem) && s > 256 && s <= 512 && logLargeCopy(v, s) =>

replicated TPU computation. The number of times a TPU computation is
replicated is defined in the `tf.TPUReplicateMetadata` op (`num_replicas`
attribute) and operand and result sizes of `tf.TPUReplicatedInput` and
`tf.TPUReplicatedOutput` respectively must match, excluding packed tensors.
It is also assumed ops of the same TPU computation do not have ops outside