Add regression tests for comments in macros

Add regression tests for some corner cases for handling comments in macros.

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

ivtest/ivltests/macro_comment1.v

@@ -0,0 +1,16 @@
+// Check that a '*' or '/' following a C-style comment is supported in a macro
+
+`define x(a, b) a /* comment */ * b
+`define y(a, b) a /* comment */ / b
+
+ module test;
+
+  initial begin
+    if (`x(2, 3) === 6 && `y(8, 2) === 4) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+ endmodule

ivtest/ivltests/macro_comment2.v

@@ -0,0 +1,17 @@
+// Check that another comment directly following a C-style comment is
+// supported in a macro.
+
+`define x(a, b) a /* comment */// * b
+`define y(a, b) a /* comment *//*/ b*/
+
+ module test;
+
+  initial begin
+    if (`x(2, 3) === 2 && `y(8, 2) === 8) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+ endmodule

ivtest/ivltests/macro_comment3.v

@@ -0,0 +1,16 @@
+// Check that a '/' directly after opening a C-style comment gets handled
+// correctly in a macro.
+
+`define x(a, b) a /*/ b */ + b
+
+ module test;
+
+  initial begin
+    if (`x(2, 3) === 5) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+ endmodule

ivtest/regress-vlg.list

@@ -635,6 +635,9 @@ localparam_type		normal			ivltests gold=parameter_type.gold
 long_div		normal			ivltests gold=long_div.gold
 macro2			normal			ivltests
 macro_args		CO,-yivltests			ivltests
+macro_comment1		normal			ivltests
+macro_comment2		normal			ivltests
+macro_comment3		normal			ivltests
 macro_redefinition	normal,-Wmacro-redefinition	ivltests gold=macro_redefinition.gold
 macro_replacement	normal,-Wmacro-replacement	ivltests gold=macro_replacement.gold
 macsub			normal			ivltests