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Support compound literals for bit_field

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gingerBill
2024-02-22 18:41:15 +00:00
parent 5f001f6d51
commit afcc2889ec
3 changed files with 77 additions and 6 deletions
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src/llvm_backend_expr.cpp
+32
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@@ -4235,6 +4235,38 @@ gb_internal lbAddr lb_build_addr_compound_lit(lbProcedure *p, Ast *expr) {
switch (bt->kind) {
default: GB_PANIC("Unknown CompoundLit type: %s", type_to_string(type)); break;
case Type_BitField:
for (Ast *elem : cl->elems) {
ast_node(fv, FieldValue, elem);
String name = fv->field->Ident.token.string;
Selection sel = lookup_field(bt, name, false);
GB_ASSERT(sel.is_bit_field);
GB_ASSERT(!sel.indirect);
GB_ASSERT(sel.index.count == 1);
GB_ASSERT(sel.entity != nullptr);
i64 index = sel.index[0];
i64 bit_offset = 0;
i64 bit_size = -1;
for_array(i, bt->BitField.fields) {
Entity *f = bt->BitField.fields[i];
if (f == sel.entity) {
bit_offset = bt->BitField.bit_offsets[i];
bit_size = bt->BitField.bit_sizes[i];
break;
}
}
GB_ASSERT(bit_size > 0);
Type *field_type = sel.entity->type;
lbValue field_expr = lb_build_expr(p, fv->value);
field_expr = lb_emit_conv(p, field_expr, field_type);
lbAddr field_addr = lb_addr_bit_field(v.addr, field_type, index, bit_offset, bit_size);
lb_addr_store(p, field_addr, field_expr);
}
return v;
case Type_Struct: {
// TODO(bill): "constant" '#raw_union's are not initialized constantly at the moment.
// NOTE(bill): This is due to the layout of the unions when printed to LLVM-IR