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Fix type_union_tag_offset when all members are zero sized

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Jeroen van Rijn
2025-05-05 18:09:54 +02:00
parent c4719e75fd
commit 2224911aca
2 changed files with 6 additions and 5 deletions
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src/check_builtin.cpp
+4 -3
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@@ -6032,12 +6032,13 @@ gb_internal bool check_builtin_procedure(CheckerContext *c, Operand *operand, As
// NOTE(jakubtomsu): forces calculation of variant_block_size
type_size_of(u);
i64 tag_offset = u->Union.variant_block_size;
GB_ASSERT(tag_offset > 0);
// NOTE(Jeroen): A tag offset of zero is perfectly fine if all members of the union are empty structs.
// What matters is that the tag size is > 0.
GB_ASSERT(u->Union.tag_size > 0);
operand->mode = Addressing_Constant;
operand->type = t_untyped_integer;
operand->value = exact_value_i64(tag_offset);
operand->value = exact_value_i64(u->Union.variant_block_size);
}
break;