Add regression tests for package variable lifetimes

Check that package variables can use explicit static lifetime. Check that
automatic lifetime is rejected for package variables.

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

ivtest/ivltests/sv_package_lifetime.v

@@ -0,0 +1,40 @@
+// Check that static lifetime can be specified for variables declared in a
+// package.
+
+`define check(val, exp) \
+  if (val !== exp) begin \
+    $display("FAILED(%0d). '%s' expected %b, got %b", `__LINE__, `"val`", exp, val); \
+    failed = 1'b1; \
+  end
+
+package P;
+  static int x = 1;
+  const static int y = 2;
+  var static z;
+  var static logic [3:0] w = 4'h3;
+endpackage
+
+package automatic Q;
+  int a = 4;
+  static int b = 5;
+endpackage
+
+module test;
+  import P::*;
+  import Q::*;
+
+  bit failed = 1'b0;
+
+  initial begin
+    `check(x, 1)
+    `check(y, 2)
+    `check(z, 1'bx)
+    `check(w, 4'h3)
+    `check(a, 4)
+    `check(b, 5)
+
+    if (!failed) begin
+      $display("PASSED");
+    end
+  end
+endmodule

ivtest/ivltests/sv_package_lifetime_fail.v

@@ -0,0 +1,6 @@
+// Check that automatic lifetime cannot be specified for variables declared in
+// a package.
+
+package P;
+  automatic int x;
+endpackage

ivtest/regress-vvp.list

@@ -280,6 +280,8 @@ sv_module_port1			vvp_tests/sv_module_port1.json
 sv_module_port2			vvp_tests/sv_module_port2.json
 sv_module_port3			vvp_tests/sv_module_port3.json
 sv_module_port4			vvp_tests/sv_module_port4.json
+sv_package_lifetime		vvp_tests/sv_package_lifetime.json
+sv_package_lifetime_fail	vvp_tests/sv_package_lifetime_fail.json
 sv_parameter_type		vvp_tests/sv_parameter_type.json
 sv_queue_assign_op		vvp_tests/sv_queue_assign_op.json
 sv_wildcard_import8		vvp_tests/sv_wildcard_import8.json

ivtest/vvp_tests/sv_package_lifetime.json

@@ -0,0 +1,5 @@
+{
+    "type"          : "normal",
+    "source"        : "sv_package_lifetime.v",
+    "iverilog-args" : [ "-g2005-sv" ]
+}

ivtest/vvp_tests/sv_package_lifetime_fail.json

@@ -0,0 +1,5 @@
+{
+    "type"          : "CE",
+    "source"        : "sv_package_lifetime_fail.v",
+    "iverilog-args" : [ "-g2005-sv" ]
+}