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Clone child elements lazily in Vec (bp #1329) #1333

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merged 2 commits into from
Feb 11, 2020
Merged

Clone child elements lazily in Vec (bp #1329) #1333

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306d963
Clone child elements lazily in Vec (#1329)
jackkoenig Feb 11, 2020
773df11
Merge branch '3.2.x' into mergify/bp/3.2.x/pr-1329
jackkoenig Feb 11, 2020
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9 changes: 6 additions & 3 deletions chiselFrontend/src/main/scala/chisel3/Aggregate.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -165,9 +165,12 @@ sealed class Vec[T <: Data] private[chisel3] (gen: => T, val length: Int)
// Note: the constructor takes a gen() function instead of a Seq to enforce
// that all elements must be the same and because it makes FIRRTL generation
// simpler.
private val self: Seq[T] = Vector.fill(length)(gen)
for ((elt, i) <- self.zipWithIndex)
elt.setRef(this, i)
private lazy val self: Seq[T] = {
val _self = Vector.fill(length)(gen)
for ((elt, i) <- _self.zipWithIndex)
elt.setRef(this, i)
_self
}

/**
* sample_element 'tracks' all changes to the elements.
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