zig

commit 9694c83b954d1bd4a3f224ef69d75639e6da56c7 (tree)
parent d07b67a55cba683c7adb73f5e2f7b1bec803a361
Author: Alex Rønne Petersen <alex@alexrp.com>
Date:   Mon, 22 Sep 2025 04:56:46 +0200

Revert "frontend: another packedStructFieldPtrInfo fix"

This reverts commit 3ab845e028f464666856e4eaaeff2e6ab1b3da5d.

Diffstat:
M
src/Type.zig
 | 
5
++++-
M
test/behavior/union.zig
 | 
10
+++++++---

2 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/src/Type.zig b/src/Type.zig
@@ -3545,7 +3545,10 @@ pub fn packedStructFieldPtrInfo(struct_ty: Type, parent_ptr_ty: Type, field_idx:
         parent_ptr_info.packed_offset.host_size,
         parent_ptr_info.packed_offset.bit_offset + bit_offset,
     } else .{
-        @intCast(struct_ty.abiSize(zcu)),
+        switch (zcu.comp.getZigBackend()) {
+            else => (running_bits + 7) / 8,
+            .stage2_x86_64 => @intCast(struct_ty.abiSize(zcu)),
+        },
         bit_offset,
     };
 
diff --git a/test/behavior/union.zig b/test/behavior/union.zig
@@ -1564,9 +1564,13 @@ test "packed union field pointer has correct alignment" {
     const bp = &b.u.x;
     const cp = &c.u.x;
 
-    comptime assert(@TypeOf(ap) == *align(4:2:@sizeOf(S)) u20);
-    comptime assert(@TypeOf(bp) == *align(1:2:@sizeOf(S)) u20);
-    comptime assert(@TypeOf(cp) == *align(64:2:@sizeOf(S)) u20);
+    const host_size = switch (builtin.zig_backend) {
+        else => comptime std.math.divCeil(comptime_int, @bitSizeOf(S), 8) catch unreachable,
+        .stage2_x86_64 => @sizeOf(S),
+    };
+    comptime assert(@TypeOf(ap) == *align(4:2:host_size) u20);
+    comptime assert(@TypeOf(bp) == *align(1:2:host_size) u20);
+    comptime assert(@TypeOf(cp) == *align(64:2:host_size) u20);
 
     a.u = .{ .x = 123 };
     b.u = .{ .x = 456 };