Added vec IO tests for #104 (#480)

* Added vec IO tests for #104

* Added Vec test case for Reg of vecs

* Change Vec creation to check if gen is lit (and hence needs to be declared)
Fixes #104

* Fix tests (add IO())), Vec.fill()

* Fix deprecated usage.

* Add Binding IO() NPE fix so tests pass.

* Fix style - use space consistently.

* Fix style - use space consistently.

1 files changed, 12 insertions, 5 deletions

diff --git a/chiselFrontend/src/main/scala/chisel3/core/Aggregate.scala b/chiselFrontend/src/main/scala/chisel3/core/Aggregate.scala
index efb30326..5f64b079 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/Aggregate.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/Aggregate.scala
@@ -43,12 +43,19 @@ object Vec {
     *
     * @note elements are NOT assigned by default and have no value
     */
-  def apply[T <: Data](n: Int, gen: T)(implicit compileOptions: CompileOptions): Vec[T] =
-    new Vec(gen.chiselCloneType, n)
+  def apply[T <: Data](n: Int, gen: T): Vec[T] = macro VecTransform.apply_ngen;
+
+  def do_apply[T <: Data](n: Int, gen: T)(implicit sourceInfo: SourceInfo, compileOptions: CompileOptions): Vec[T] = {
+    if ( gen.isLit ) {
+      Vec(Seq.fill(n)(gen))
+    } else {
+      new Vec(gen.chiselCloneType, n)
+    }
+  }
 
   @deprecated("Vec argument order should be size, t; this will be removed by the official release", "chisel3")
-  def apply[T <: Data](gen: T, n: Int)(implicit compileOptions: CompileOptions): Vec[T] =
-    apply(n, gen)
+  def apply[T <: Data](gen: T, n: Int)(implicit sourceInfo: SourceInfo, compileOptions: CompileOptions): Vec[T] =
+    do_apply(n, gen)
 
   /** Creates a new [[Vec]] composed of elements of the input Seq of [[Data]]
     * nodes.
@@ -233,7 +240,7 @@ sealed class Vec[T <: Data] private (gen: => T, val length: Int)
   }
 
   override def cloneType: this.type = {
-    new Vec(gen, length).asInstanceOf[this.type]
+    new Vec(gen.cloneType, length).asInstanceOf[this.type]
   }
 
   private[chisel3] def toType: String = s"${sample_element.toType}[$length]"