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Fix #5129

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This commit is contained in:
gingerBill
2026-03-15 17:15:16 +00:00
parent 0314c91a64
commit c51391f8cb
5 changed files with 37 additions and 9 deletions
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8
src/llvm_backend_general.cpp
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@@ -1497,7 +1497,7 @@ gb_internal lbValue lb_addr_load(lbProcedure *p, lbAddr const &addr) {
}
gb_internal lbValue lb_const_union_tag(lbModule *m, Type *u, Type *v) {
return lb_const_value(m, union_tag_type(u), exact_value_i64(union_variant_index(u, v)));
return lb_const_value(m, union_tag_type(u), exact_value_i64(union_variant_index_checked(u, v)));
}
gb_internal lbValue lb_emit_union_tag_ptr(lbProcedure *p, lbValue u) {
@@ -1540,13 +1540,17 @@ gb_internal void lb_emit_store_union_variant_tag(lbProcedure *p, lbValue parent,
// No tag needed!
} else {
lbValue tag_ptr = lb_emit_union_tag_ptr(p, parent);
lb_emit_store(p, tag_ptr, lb_const_union_tag(p->module, t, variant_type));
lbValue tag = lb_const_union_tag(p->module, t, variant_type);
lb_emit_store(p, tag_ptr, tag);
}
}
gb_internal void lb_emit_store_union_variant(lbProcedure *p, lbValue parent, lbValue variant, Type *variant_type) {
Type *pt = base_type(type_deref(parent.type));
GB_ASSERT(pt->kind == Type_Union);
GB_ASSERT_MSG(union_is_variant_of(pt, variant_type), "%s %s", type_to_string(pt), type_to_string(variant_type));
if (pt->Union.kind == UnionType_shared_nil) {
GB_ASSERT(type_size_of(variant_type));