1 files changed, 141 insertions, 0 deletions
diff --git a/test/behavior/call.zig b/test/behavior/call.zig
index 119dc289b1..27d0bbf1d6 100644
--- a/test/behavior/call.zig
+++ b/test/behavior/call.zig
@@ -118,3 +118,144 @@ test "result location of function call argument through runtime condition and st
         .e = if (!runtime) .a else .b,
     });
 }
+
+test "function call with 40 arguments" {
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+
+    const S = struct {
+        fn doTheTest(thirty_nine: i32) !void {
+            const result = add(
+                0,
+                1,
+                2,
+                3,
+                4,
+                5,
+                6,
+                7,
+                8,
+                9,
+                10,
+                11,
+                12,
+                13,
+                14,
+                15,
+                16,
+                17,
+                18,
+                19,
+                20,
+                21,
+                22,
+                23,
+                24,
+                25,
+                26,
+                27,
+                28,
+                29,
+                30,
+                31,
+                32,
+                33,
+                34,
+                35,
+                36,
+                37,
+                38,
+                thirty_nine,
+                40,
+            );
+            try expect(result == 820);
+            try expect(thirty_nine == 39);
+        }
+
+        fn add(
+            a0: i32,
+            a1: i32,
+            a2: i32,
+            a3: i32,
+            a4: i32,
+            a5: i32,
+            a6: i32,
+            a7: i32,
+            a8: i32,
+            a9: i32,
+            a10: i32,
+            a11: i32,
+            a12: i32,
+            a13: i32,
+            a14: i32,
+            a15: i32,
+            a16: i32,
+            a17: i32,
+            a18: i32,
+            a19: i32,
+            a20: i32,
+            a21: i32,
+            a22: i32,
+            a23: i32,
+            a24: i32,
+            a25: i32,
+            a26: i32,
+            a27: i32,
+            a28: i32,
+            a29: i32,
+            a30: i32,
+            a31: i32,
+            a32: i32,
+            a33: i32,
+            a34: i32,
+            a35: i32,
+            a36: i32,
+            a37: i32,
+            a38: i32,
+            a39: i32,
+            a40: i32,
+        ) i32 {
+            return a0 +
+                a1 +
+                a2 +
+                a3 +
+                a4 +
+                a5 +
+                a6 +
+                a7 +
+                a8 +
+                a9 +
+                a10 +
+                a11 +
+                a12 +
+                a13 +
+                a14 +
+                a15 +
+                a16 +
+                a17 +
+                a18 +
+                a19 +
+                a20 +
+                a21 +
+                a22 +
+                a23 +
+                a24 +
+                a25 +
+                a26 +
+                a27 +
+                a28 +
+                a29 +
+                a30 +
+                a31 +
+                a32 +
+                a33 +
+                a34 +
+                a35 +
+                a36 +
+                a37 +
+                a38 +
+                a39 +
+                a40;
+        }
+    };
+    try S.doTheTest(39);
+}