4 files changed, 12 insertions, 2 deletions
diff --git a/src/main/scala/chisel3/Driver.scala b/src/main/scala/chisel3/Driver.scala
index dbd9b464..a0713379 100644
--- a/src/main/scala/chisel3/Driver.scala
+++ b/src/main/scala/chisel3/Driver.scala
@@ -119,13 +119,13 @@ trait BackendCompilationUtilities {
         "-Wno-WIDTH",
         "-Wno-STMTDLY",
         "--trace",
-        "-O2",
+        "-O0",
         "--top-module", topModule,
         "+define+TOP_TYPE=V" + dutFile,
         s"+define+PRINTF_COND=!$topModule.reset",
         s"+define+STOP_COND=!$topModule.reset",
         "-CFLAGS",
-        s"""-Wno-undefined-bool-conversion -O2 -DTOP_TYPE=V$dutFile -include V$dutFile.h""",
+        s"""-Wno-undefined-bool-conversion -O0 -DTOP_TYPE=V$dutFile -include V$dutFile.h""",
         "-Mdir", dir.toString,
         "--exe", cppHarness.toString)
     System.out.println(s"${command.mkString(" ")}") // scalastyle:ignore regex
diff --git a/src/main/scala/chisel3/package.scala b/src/main/scala/chisel3/package.scala
index 0a57b7de..e0364868 100644
--- a/src/main/scala/chisel3/package.scala
+++ b/src/main/scala/chisel3/package.scala
@@ -37,6 +37,8 @@ package object chisel3 {    // scalastyle:ignore package.object.name
   val UInt = chisel3.core.UInt
   type SInt = chisel3.core.SInt
   val SInt = chisel3.core.SInt
+  type FixedPoint = chisel3.core.FixedPoint
+  val FixedPoint = chisel3.core.FixedPoint
   type Bool = chisel3.core.Bool
   val Bool = chisel3.core.Bool
   val Mux = chisel3.core.Mux
@@ -150,8 +152,13 @@ package object chisel3 {    // scalastyle:ignore package.object.name
     def B: Bool = Bool(x)    // scalastyle:ignore method.name
   }
 
+  implicit class fromDoubleToLiteral(val x: Double) extends AnyVal {
+    def F(binaryPoint: Int): FixedPoint = FixedPoint.fromDouble(x, binaryPoint = binaryPoint)
+  }
+
   implicit class fromUIntToBitPatComparable(val x: UInt) extends AnyVal {
     final def === (that: BitPat): Bool = macro SourceInfoTransform.thatArg
+    @deprecated("Use '=/=', which avoids potential precedence problems", "chisel3")
     final def != (that: BitPat): Bool = macro SourceInfoTransform.thatArg
     final def =/= (that: BitPat): Bool = macro SourceInfoTransform.thatArg
 
diff --git a/src/main/scala/chisel3/util/BitPat.scala b/src/main/scala/chisel3/util/BitPat.scala
index 972010a6..e58258c7 100644
--- a/src/main/scala/chisel3/util/BitPat.scala
+++ b/src/main/scala/chisel3/util/BitPat.scala
@@ -82,6 +82,7 @@ sealed class BitPat(val value: BigInt, val mask: BigInt, width: Int) {
   def getWidth: Int = width
   def === (that: UInt): Bool = macro SourceInfoTransform.thatArg
   def =/= (that: UInt): Bool = macro SourceInfoTransform.thatArg
+  @deprecated("Use '=/=', which avoids potential precedence problems", "chisel3")
   def != (that: UInt): Bool = macro SourceInfoTransform.thatArg
 
   def do_=== (that: UInt)(implicit sourceInfo: SourceInfo): Bool = value.asUInt === (that & mask.asUInt)    // scalastyle:ignore method.name
diff --git a/src/main/scala/chisel3/util/Decoupled.scala b/src/main/scala/chisel3/util/Decoupled.scala
index a0cbf4f7..c9d57759 100644
--- a/src/main/scala/chisel3/util/Decoupled.scala
+++ b/src/main/scala/chisel3/util/Decoupled.scala
@@ -145,6 +145,8 @@ class QueueIO[T <: Data](gen: T, entries: Int) extends Bundle
   val deq = EnqIO(gen)
   /** The current amount of data in the queue */
   val count = Output(UInt.width(log2Up(entries + 1)))
+
+  override def cloneType = new QueueIO(gen, entries).asInstanceOf[this.type]
 }
 
 /** A hardware module implementing a Queue