Add regression test for implicit `localparam`

Check that all parameters in a parameter port list after a `localparam` get
elaborated as localparams, until the next `parameter`.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

ivtest/ivltests/localparam_implicit.v

@@ -0,0 +1,30 @@
+// Check that all parameters in a parameter port list after a `localparam` get
+// elaborated as localparams, until the next `parameter`.
+
+module a #(
+  parameter A = 1, B = 2,
+  localparam C = 3, D = 4,
+  parameter E = 5
+);
+
+initial begin
+  if (A == 10 && B == 20 && C == 3 && D == 4 && E == 50) begin
+    $display("PASSED");
+  end else begin
+    $display("FAILED");
+  end
+end
+
+endmodule
+
+module b;
+
+  a #(
+    .A(10),
+    .B(20),
+    .C(30),
+    .D(40),
+    .E(50)
+  ) i_a();
+
+endmodule

ivtest/regress-sv.list

@@ -300,6 +300,7 @@ l_equiv			normal,-g2005-sv	ivltests
 l_equiv_ca		normal,-g2005-sv	ivltests
 l_equiv_const		normal,-g2005-sv	ivltests
 line_directive		normal,-g2009,-I./ivltests	ivltests gold=line_directive.gold
+localparam_implicit	normal,-g2005-sv	ivltests
 localparam_query	normal,-g2005-sv	ivltests
 localparam_type2	normal,-g2009		ivltests
 logical_short_circuit	normal,-g2012		ivltests