Add regression test for invalid declarations in generate blocks

Check that the following declarations inside a generate block generate an
error:
 * module, program or interface
 * specparam
 * specify block
 * timeunit

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

ivtest/ivltests/generate_module.v

@@ -0,0 +1,16 @@
+// Check that declaring a module inside a generate block is an error
+
+module test #(
+  parameter A = 1
+);
+
+generate
+  if (A) begin
+    // Error
+    module inner;
+      initial $display("FAILED");
+    endmodule
+  end
+endgenerate
+
+endmodule

ivtest/ivltests/generate_specify.v

@@ -0,0 +1,18 @@
+// Check that a specify block inside a generate block is an error
+
+module test #(
+  parameter A = 1
+);
+
+generate
+  if (A) begin
+    specify // Error
+    endspecify
+  end
+endgenerate
+
+initial begin
+  $display("FAILED");
+end
+
+endmodule

ivtest/ivltests/generate_specparam.v

@@ -0,0 +1,17 @@
+// Check that declaring a specparam inside a generate block is an error
+
+module test #(
+  parameter A = 1
+);
+
+generate
+  if (A) begin
+    specparam x = 10; // Error
+  end
+endgenerate
+
+initial begin
+  $display("FAILED");
+end
+
+endmodule

ivtest/ivltests/generate_timeunit.v

@@ -0,0 +1,17 @@
+// Check that declaring a timeunit inside a generate block is an error
+
+module test #(
+  parameter A = 1
+);
+
+generate
+  if (A) begin
+    timeunit 10ns/1ns; // Error
+  end
+endgenerate
+
+initial begin
+  $display("FAILED");
+end
+
+endmodule

ivtest/regress-sv.list

@@ -269,6 +269,8 @@ function10		CO,-g2005-sv		ivltests
 function11		CE,-g2005-sv		ivltests
 function12		normal,-g2005-sv	ivltests gold=function12.gold
 genvar_inc_dec		normal,-g2009		ivltests
+generate_module		CE,-g2005-sv		ivltests
+generate_timeunit	CE,-g2005-sv		ivltests
 ibit_test		normal,-g2005-sv	ivltests
 ibyte_test		normal,-g2005-sv	ivltests
 iint_test		normal,-g2005-sv	ivltests

ivtest/regress-vlg.list

@@ -570,6 +570,8 @@ generate_case		normal			ivltests
 generate_case2		normal			ivltests
 generate_case3		normal			ivltests
 generate_multi_loop	normal			ivltests gold=generate_multi_loop.gold
+generate_specify	CE,-g2005-sv		ivltests
+generate_specparam	CE,-g2005-sv		ivltests
 genloop			normal			ivltests
 genvar_scopes		normal			ivltests
 hello1			normal			ivltests