Fixes SI-5629.

Adds an additional argument to the unify method in
specialization - `tparams`. When this parameter is set
to `true`, unification is done over type parameters in
poly types as well.

Additionally, the unification in specialization now
works over type bounds.

This ensures that in the below example:

trait Foo[@specialized(Int) A] {
  def bar[B <: A](b: B) {}
}

class IntFoo extends Foo[Int] {
  override def bar[B <: Int](b: B) {}
}

the method `bar` gets correctly determined
as a method that needs a special override
for its `bar$mcI$sp`.

1 files changed, 36 insertions, 0 deletions

diff --git a/test/files/run/t5629.scala b/test/files/run/t5629.scala
new file mode 100644
index 0000000000..69feddd3a5
--- /dev/null
+++ b/test/files/run/t5629.scala
@@ -0,0 +1,36 @@
+
+
+
+import scala.{specialized => spec}
+
+
+
+trait GrandParent[@spec(Int) -A] {
+  def foo(a: A): Unit
+  def bar[B <: A](b: B): Unit = println("grandparent got: %s" format b)
+}
+
+
+trait Parent[@spec(Int) -A] extends GrandParent[A] {
+  def foo(a: A) = bar(a)
+}
+
+
+class IntChild extends Parent[Int] {
+  override def bar[B <: Int](b: B): Unit = println("int child got: %s" format b)
+}
+
+
+class AnyChild extends Parent[Any] {
+  override def bar[B <: Any](b: B): Unit = println("any child got: %s" format b)
+}
+
+
+object Test {
+  
+  def main(args: Array[String]) {
+    new IntChild().foo(33)
+    new AnyChild().foo(33)
+  }
+  
+}