Add test for std::randomize with complex expressions

Signed-off-by: Jakub Wasilewski <jwasilewski@antmicro.com>

test_regress/t/t_randomize_arraysel_membersel.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2025 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+import vltest_bootstrap
+
+test.scenarios('simulator')
+
+if not test.have_solver:
+    test.skip("No constraint solver installed")
+
+test.compile()
+
+test.execute()
+
+test.passes()

test_regress/t/t_randomize_arraysel_membersel.v

@@ -0,0 +1,107 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2025 by Antmicro.
+// SPDX-License-Identifier: CC0-1.0
+
+class inner_class;
+  logic [3:0] c;
+  logic [3:0] d[2];
+endclass
+
+class test_class;
+  logic [3:0] member[5];
+  logic [3:0] member_2d[3][4];
+  inner_class b;
+endclass
+
+module t;
+  initial begin
+    test_class example;
+    example = new;
+    example.b = new;
+
+    // Simple array element access
+    repeat(5) begin
+      if (std::randomize(example.member[1]) with {example.member[1] inside {[0 : 3]};} == 0) begin
+        $stop;
+      end
+      if (example.member[1] > 3) begin
+        $stop;
+      end
+    end
+
+    // Different array indices
+    repeat(5) begin
+      if (std::randomize(example.member[0]) with {example.member[0] inside {[5 : 7]};} == 0) begin
+        $stop;
+      end
+      if (example.member[0] < 5 || example.member[0] > 7) begin
+        $stop;
+      end
+    end
+
+    // Last element
+    repeat(5) begin
+      if (std::randomize(example.member[4]) with {example.member[4] inside {[10 : 15]};} == 0) begin
+        $stop;
+      end
+      if (example.member[4] < 10 || example.member[4] > 15) begin
+        $stop;
+      end
+    end
+
+    // 2D array access
+    repeat(5) begin
+      if (std::randomize(example.member_2d[1][2]) with {example.member_2d[1][2] inside {[8 : 12]};} == 0) begin
+        $stop;
+      end
+      if (example.member_2d[1][2] < 8 || example.member_2d[1][2] > 12) begin
+        $stop;
+      end
+    end
+
+    // 2D array different indices
+    repeat(5) begin
+      if (std::randomize(example.member_2d[0][0]) with {example.member_2d[0][0] inside {[1 : 4]};} == 0) begin
+        $stop;
+      end
+      if (example.member_2d[0][0] < 1 || example.member_2d[0][0] > 4) begin
+        $stop;
+      end
+    end
+
+    // Nested object: obj.b.c
+    repeat(5) begin
+      if (std::randomize(example.b.c) with {example.b.c inside {[5 : 9]};} == 0) begin
+        $stop;
+      end
+      if (example.b.c < 5 || example.b.c > 9) begin
+        $stop;
+      end
+    end
+
+    // Nested object with array: obj.b.d[0]
+    repeat(5) begin
+      if (std::randomize(example.b.d[0]) with {example.b.d[0] inside {[11 : 14]};} == 0) begin
+        $stop;
+      end
+      if (example.b.d[0] < 11 || example.b.d[0] > 14) begin
+        $stop;
+      end
+    end
+
+    // Nested object with array: obj.b.d[1] (different index)
+    repeat(5) begin
+      if (std::randomize(example.b.d[1]) with {example.b.d[1] inside {[2 : 6]};} == 0) begin
+        $stop;
+      end
+      if (example.b.d[1] < 2 || example.b.d[1] > 6) begin
+        $stop;
+      end
+    end
+
+    $write("*-* All Finished *-*\n");
+    $finish;
+  end
+endmodule