From 44badf50de6e76253c2575581fb0daff0416f032 Mon Sep 17 00:00:00 2001
From: Ethan Sifferman <ethan@sifferman.dev>
Date: Fri, 28 Jul 2023 23:51:02 -0700
Subject: [PATCH] added test

---
 ivtest/ivltests/sv_argumentless_func.v     | 29 ++++++++++++++++++++++
 ivtest/regress-vvp.list                    |  1 +
 ivtest/vvp_tests/sv_argumentless_func.json |  5 ++++
 3 files changed, 35 insertions(+)
 create mode 100644 ivtest/ivltests/sv_argumentless_func.v
 create mode 100644 ivtest/vvp_tests/sv_argumentless_func.json

diff --git a/ivtest/ivltests/sv_argumentless_func.v b/ivtest/ivltests/sv_argumentless_func.v
new file mode 100644
index 000000000..858da97f0
--- /dev/null
+++ b/ivtest/ivltests/sv_argumentless_func.v
@@ -0,0 +1,29 @@
+
+module test;
+
+function automatic [7:0] test_func;
+    input _unused;
+    test_func = _unused;
+endfunction
+
+logic [7:0] test_assign;
+assign test_assign = test_func(0);
+
+wire [7:0] test_wire = test_func(0);
+
+initial begin
+    if (test_assign !== test_func(0)) begin
+        $display("FAILED -- test_assign=%h, expect %h", test_assign, test_func(0));
+        $finish;
+    end
+
+    if (test_wire !== test_func(0)) begin
+        $display("FAILED -- test_wire=%h, expect %h", test_wire, test_func(0));
+        $finish;
+    end
+
+    $display("PASSED");
+    $finish;
+end
+
+endmodule
diff --git a/ivtest/regress-vvp.list b/ivtest/regress-vvp.list
index 11f9dc682..a3a38b0ed 100644
--- a/ivtest/regress-vvp.list
+++ b/ivtest/regress-vvp.list
@@ -56,6 +56,7 @@ sv_ap_uarray5			vvp_tests/sv_ap_uarray5.json
 sv_ap_uarray6			vvp_tests/sv_ap_uarray6.json
 sv_ap_uarray_fail1		vvp_tests/sv_ap_uarray_fail1.json
 sv_ap_uarray_fail2		vvp_tests/sv_ap_uarray_fail2.json
+sv_argumentless_func		vvp_tests/sv_argumentless_func.json
 sv_array_assign_fail1	vvp_tests/sv_array_assign_fail1.json
 sv_array_assign_fail2	vvp_tests/sv_array_assign_fail2.json
 sv_array_cassign6		vvp_tests/sv_array_cassign6.json
diff --git a/ivtest/vvp_tests/sv_argumentless_func.json b/ivtest/vvp_tests/sv_argumentless_func.json
new file mode 100644
index 000000000..6cf5de5aa
--- /dev/null
+++ b/ivtest/vvp_tests/sv_argumentless_func.json
@@ -0,0 +1,5 @@
+{
+    "type"          : "normal",
+    "source"        : "sv_argumentless_func.v",
+    "iverilog-args" : [ "-g2012" ]
+}