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translate-c: fix applying struct alignment to first field #23863

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translate-c: fix applying struct alignment to first field #23863

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4 changes: 2 additions & 2 deletions src/translate_c.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -977,8 +977,8 @@ fn transRecordDecl(c: *Context, scope: *Scope, record_decl: *const clang.RecordD
else => |e| return e,
};

const alignment = if (flexible_field != null and field_decl.getFieldIndex() == 0)
@as(c_uint, @intCast(record_alignment))
const alignment: ?c_uint = if (flexible_field == null and field_decl.getFieldIndex() == 0)
@intCast(record_alignment)
else
ClangAlignment.forField(c, field_decl, record_def).zigAlignment();

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12 changes: 12 additions & 0 deletions test/cases/translate_c/aligned_struct.c
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
struct __attribute__((aligned(16))) foo {
int bar;
int baz;
};

// translate-c
// c_frontend=aro,clang
//
// pub const struct_foo = extern struct {
// bar: c_int align(16) = @import("std").mem.zeroes(c_int),
// baz: c_int = @import("std").mem.zeroes(c_int),
// };
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