Add regression test for scalar and 1-bit parameters

Check that scalar typed parameters are handled correctly. Make sure the
width of the parameter only depends on the type and not on the value
assigned to the parameter.

Same for parameters with a 1-bit range specification.

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

ivtest/ivltests/parameter_1bit.v

@@ -0,0 +1,26 @@
+// Check that parameters with a implicit and 1-bit range type are handled correctly
+
+module test #(
+  // This should get truncated to 1'b1
+  parameter [0:0] P = 2'b11
+);
+
+  reg failed = 1'b0;
+
+  `define check(expr, val) \
+    if (expr !== val) begin \
+      $display("FAILED: `%s`, expected %0d, got %0d", `"expr`", val, expr); \
+      failed = 1'b1; \
+    end
+
+  initial begin
+    `check($bits(P), 1);
+    `check(P + 1'b1, 1'b0);
+    `check(P, 1'b1);
+
+    if (!failed) begin
+      $display("PASSED");
+    end
+  end
+
+endmodule

ivtest/ivltests/parameter_scalar.v

@@ -0,0 +1,26 @@
+// Check that parameters with a scalar type are handled correctly
+
+module test #(
+  // This should get truncated to 1'b1
+  parameter bit P = 2'b11
+);
+
+  bit failed = 1'b0;
+
+  `define check(expr, val) \
+    if (expr !== val) begin \
+      $display("FAILED: `%s`, expected %0d, got %0d", `"expr`", val, expr); \
+      failed = 1'b1; \
+    end
+
+  initial begin
+    `check($bits(P), 1);
+    `check(P + 1'b1, 1'b0);
+    `check(P, 1'b1);
+
+    if (!failed) begin
+      $display("PASSED");
+    end
+  end
+
+endmodule

ivtest/regress-sv.list

@@ -374,6 +374,7 @@ parameter_no_default_fail2 CE			ivltests
 parameter_no_default_toplvl normal,-g2005-sv	ivltests
 parameter_override_invalid7 CE,-g2005-sv	ivltests
 parameter_override_invalid8 CE,-g2005-sv	ivltests
+parameter_scalar	normal,-g2005-sv	ivltests
 parameter_type2		normal,-g2009		ivltests
 parpkg_test		normal,-g2009		ivltests
 parpkg_test2		normal,-g2009		ivltests

ivtest/regress-vlg.list

@@ -712,6 +712,7 @@ param_test2		normal			ivltests gold=param_test2.gold
 param_test3		normal			ivltests gold=param_test3.gold # PR#293
 param_test4		normal			ivltests
 param_times		normal			ivltests # param has multiplication.
+parameter_1bit		normal			ivltests
 parameter_type		normal			ivltests gold=parameter_type.gold
 parameter_in_generate1	CE			ivltests
 parameter_no_default	CE			ivltests