zig

commit 59668fbe802be744c200ea9fd38fda28f5f951c1 (tree)
parent a31fe0ff12270ba2f957c2a957941a23f2143ad5
Author: Veikka Tuominen <git@vexu.eu>
Date:   Mon, 21 Mar 2022 15:05:21 +0200

stage2: add test for fixed issue

Closes #11157

Diffstat:
M
test/behavior/comptime_memory.zig
 | 
50
++++++++++++++++++++++++++++++--------------------

1 file changed, 30 insertions(+), 20 deletions(-)
diff --git a/test/behavior/comptime_memory.zig b/test/behavior/comptime_memory.zig
@@ -5,10 +5,8 @@ const ptr_size = @sizeOf(usize);
 
 test "type pun signed and unsigned as single pointer" {
     if (builtin.zig_backend == .stage1) return error.SkipZigTest;
-    if (builtin.zig_backend != .stage1) {
-        // TODO https://github.com/ziglang/zig/issues/9646
-        return error.SkipZigTest;
-    }
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
 
     comptime {
         var x: u32 = 0;
@@ -20,10 +18,7 @@ test "type pun signed and unsigned as single pointer" {
 
 test "type pun signed and unsigned as many pointer" {
     if (builtin.zig_backend == .stage1) return error.SkipZigTest;
-    if (builtin.zig_backend != .stage1) {
-        // TODO https://github.com/ziglang/zig/issues/9646
-        return error.SkipZigTest;
-    }
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
 
     comptime {
         var x: u32 = 0;
@@ -35,10 +30,7 @@ test "type pun signed and unsigned as many pointer" {
 
 test "type pun signed and unsigned as array pointer" {
     if (builtin.zig_backend == .stage1) return error.SkipZigTest;
-    if (builtin.zig_backend != .stage1) {
-        // TODO https://github.com/ziglang/zig/issues/9646
-        return error.SkipZigTest;
-    }
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
 
     comptime {
         var x: u32 = 0;
@@ -82,10 +74,7 @@ test "type pun signed and unsigned as array pointer" {
 
 test "type pun value and struct" {
     if (builtin.zig_backend == .stage1) return error.SkipZigTest;
-    if (builtin.zig_backend != .stage1) {
-        // TODO https://github.com/ziglang/zig/issues/9646
-        return error.SkipZigTest;
-    }
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
 
     comptime {
         const StructOfU32 = extern struct { x: u32 };
@@ -102,10 +91,8 @@ fn bigToNativeEndian(comptime T: type, v: T) T {
 }
 test "type pun endianness" {
     if (builtin.zig_backend == .stage1) return error.SkipZigTest;
-    if (builtin.zig_backend != .stage1) {
-        // TODO https://github.com/ziglang/zig/issues/9646
-        return error.SkipZigTest;
-    }
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
 
     comptime {
         const StructOfBytes = extern struct { x: [4]u8 };
@@ -412,3 +399,26 @@ test "offset field ptr by enclosing array element size" {
         }
     }
 }
+
+test "accessing reinterpreted memory of parent object" {
+    if (builtin.zig_backend == .stage1) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
+    const S = extern struct {
+        a: f32,
+        b: [4]u8,
+        c: f32,
+    };
+    const expected = if (endian == .Little) 102 else 38;
+
+    comptime {
+        const x = S{
+            .a = 1.5,
+            .b = [_]u8{ 1, 2, 3, 4 },
+            .c = 2.6,
+        };
+        const ptr = &x.b[0];
+        const b = @ptrCast([*c]const u8, ptr)[5];
+        try testing.expect(b == expected);
+    }
+}