add behavior test for `@memset` on slices

and avoid new language feature in std.ArrayList for now, until x86_64
self-hosted backend can implement it.

1 files changed, 50 insertions, 0 deletions

diff --git a/test/behavior/basic.zig b/test/behavior/basic.zig
index a1ea2c340f..a59397d0b5 100644
--- a/test/behavior/basic.zig
+++ b/test/behavior/basic.zig
@@ -357,6 +357,14 @@ test "@memset on array pointers" {
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
     if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_wasm) {
+        // TODO: implement memset when element ABI size > 1
+        return error.SkipZigTest;
+    }
+    if (builtin.zig_backend == .stage2_x86_64) {
+        // TODO: implement memset when element ABI size > 1
+        return error.SkipZigTest;
+    }
 
     try testMemsetArray();
     try comptime testMemsetArray();
@@ -381,6 +389,48 @@ fn testMemsetArray() !void {
     }
 }
 
+test "@memset on slices" {
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_wasm) {
+        // TODO: implement memset when element ABI size > 1
+        // TODO: implement memset on slices
+        return error.SkipZigTest;
+    }
+    if (builtin.zig_backend == .stage2_x86_64) {
+        // TODO: implement memset when element ABI size > 1
+        // TODO: implement memset on slices
+        return error.SkipZigTest;
+    }
+
+    try testMemsetSlice();
+    try comptime testMemsetSlice();
+}
+
+fn testMemsetSlice() !void {
+    {
+        // memset slice to non-undefined, ABI size == 1
+        var array: [20]u8 = undefined;
+        var len = array.len;
+        var slice = array[0..len];
+        @memset(slice, 'A');
+        try expect(slice[0] == 'A');
+        try expect(slice[11] == 'A');
+        try expect(slice[19] == 'A');
+    }
+    {
+        // memset slice to non-undefined, ABI size > 1
+        var array: [20]u32 = undefined;
+        var len = array.len;
+        var slice = array[0..len];
+        @memset(slice, 1234);
+        try expect(slice[0] == 1234);
+        try expect(slice[11] == 1234);
+        try expect(slice[19] == 1234);
+    }
+}
+
 test "memcpy and memset intrinsics" {
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
     if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;