| ... | ... | @@ -1388,8 +1388,13 @@ pub const Object = struct { |
| 1388 | 1388 | if (ty.castTag(.@"struct")) |payload| { |
| 1389 | 1389 | const struct_obj = payload.data; |
| 1390 | 1390 | if (!struct_obj.haveFieldTypes()) { |
| 1391 | | // TODO: improve the frontend to populate this struct. |
| 1392 | | // For now we treat it as a zero bit type. |
| 1391 | // This can happen if a struct type makes it all the way to |
| 1392 | // flush() without ever being instantiated or referenced (even |
| 1393 | // via pointer). The only reason we are hearing about it now is |
| 1394 | // that it is being used as a namespace to put other debug types |
| 1395 | // into. Therefore we can satisfy this by making an empty namespace, |
| 1396 | // rather than changing the frontend to unnecessarily resolve the |
| 1397 | // struct field types. |
| 1393 | 1398 | const owner_decl = ty.getOwnerDecl(); |
| 1394 | 1399 | const struct_di_ty = try o.makeEmptyNamespaceDIType(owner_decl); |
| 1395 | 1400 | dib.replaceTemporary(fwd_decl, struct_di_ty); |
| ... | ... | @@ -1465,6 +1470,7 @@ pub const Object = struct { |
| 1465 | 1470 | return full_di_ty; |
| 1466 | 1471 | }, |
| 1467 | 1472 | .Union => { |
| 1473 | const compile_unit_scope = o.di_compile_unit.?.toScope(); |
| 1468 | 1474 | const owner_decl = ty.getOwnerDecl(); |
| 1469 | 1475 | |
| 1470 | 1476 | const name = try ty.nameAlloc(gpa, target); |
| ... | ... | @@ -1483,8 +1489,7 @@ pub const Object = struct { |
| 1483 | 1489 | break :blk fwd_decl; |
| 1484 | 1490 | }; |
| 1485 | 1491 | |
| 1486 | | const TODO_implement_this = true; // TODO |
| 1487 | | if (TODO_implement_this or !ty.hasRuntimeBitsIgnoreComptime()) { |
| 1492 | if (!ty.hasRuntimeBitsIgnoreComptime()) { |
| 1488 | 1493 | const union_di_ty = try o.makeEmptyNamespaceDIType(owner_decl); |
| 1489 | 1494 | dib.replaceTemporary(fwd_decl, union_di_ty); |
| 1490 | 1495 | // The recursive call to `lowerDebugType` via `makeEmptyNamespaceDIType` |
| ... | ... | @@ -1493,70 +1498,145 @@ pub const Object = struct { |
| 1493 | 1498 | return union_di_ty; |
| 1494 | 1499 | } |
| 1495 | 1500 | |
| 1496 | | @panic("TODO debug info type for union"); |
| 1497 | | //const gop = try o.type_map.getOrPut(gpa, ty); |
| 1498 | | //if (gop.found_existing) return gop.value_ptr.*; |
| 1499 | | |
| 1500 | | //// The Type memory is ephemeral; since we want to store a longer-lived |
| 1501 | | //// reference, we need to copy it here. |
| 1502 | | //gop.key_ptr.* = try ty.copy(o.type_map_arena.allocator()); |
| 1503 | | |
| 1504 | | //const layout = ty.unionGetLayout(target); |
| 1505 | | //const union_obj = ty.cast(Type.Payload.Union).?.data; |
| 1506 | | |
| 1507 | | //if (layout.payload_size == 0) { |
| 1508 | | // const enum_tag_llvm_ty = try dg.llvmType(union_obj.tag_ty); |
| 1509 | | // gop.value_ptr.* = enum_tag_llvm_ty; |
| 1510 | | // return enum_tag_llvm_ty; |
| 1511 | | //} |
| 1512 | | |
| 1513 | | //const name = try union_obj.getFullyQualifiedName(gpa); |
| 1514 | | //defer gpa.free(name); |
| 1515 | | |
| 1516 | | //const llvm_union_ty = dg.context.structCreateNamed(name); |
| 1517 | | //gop.value_ptr.* = llvm_union_ty; // must be done before any recursive calls |
| 1518 | | |
| 1519 | | //const aligned_field = union_obj.fields.values()[layout.most_aligned_field]; |
| 1520 | | //const llvm_aligned_field_ty = try dg.llvmType(aligned_field.ty); |
| 1521 | | |
| 1522 | | //const llvm_payload_ty = ty: { |
| 1523 | | // if (layout.most_aligned_field_size == layout.payload_size) { |
| 1524 | | // break :ty llvm_aligned_field_ty; |
| 1525 | | // } |
| 1526 | | // const padding_len = @intCast(c_uint, layout.payload_size - layout.most_aligned_field_size); |
| 1527 | | // const fields: [2]*const llvm.Type = .{ |
| 1528 | | // llvm_aligned_field_ty, |
| 1529 | | // dg.context.intType(8).arrayType(padding_len), |
| 1530 | | // }; |
| 1531 | | // break :ty dg.context.structType(&fields, fields.len, .True); |
| 1532 | | //}; |
| 1533 | | |
| 1534 | | //if (layout.tag_size == 0) { |
| 1535 | | // var llvm_fields: [1]*const llvm.Type = .{llvm_payload_ty}; |
| 1536 | | // llvm_union_ty.structSetBody(&llvm_fields, llvm_fields.len, .False); |
| 1537 | | // return llvm_union_ty; |
| 1538 | | //} |
| 1539 | | //const enum_tag_llvm_ty = try dg.llvmType(union_obj.tag_ty); |
| 1540 | | |
| 1541 | | //// Put the tag before or after the payload depending on which one's |
| 1542 | | //// alignment is greater. |
| 1543 | | //var llvm_fields: [3]*const llvm.Type = undefined; |
| 1544 | | //var llvm_fields_len: c_uint = 2; |
| 1545 | | |
| 1546 | | //if (layout.tag_align >= layout.payload_align) { |
| 1547 | | // llvm_fields = .{ enum_tag_llvm_ty, llvm_payload_ty, undefined }; |
| 1548 | | //} else { |
| 1549 | | // llvm_fields = .{ llvm_payload_ty, enum_tag_llvm_ty, undefined }; |
| 1550 | | //} |
| 1551 | | |
| 1552 | | //// Insert padding to make the LLVM struct ABI size match the Zig union ABI size. |
| 1553 | | //if (layout.padding != 0) { |
| 1554 | | // llvm_fields[2] = dg.context.intType(8).arrayType(layout.padding); |
| 1555 | | // llvm_fields_len = 3; |
| 1556 | | //} |
| 1557 | | |
| 1558 | | //llvm_union_ty.structSetBody(&llvm_fields, llvm_fields_len, .False); |
| 1559 | | //return llvm_union_ty; |
| 1501 | const layout = ty.unionGetLayout(target); |
| 1502 | const union_obj = ty.cast(Type.Payload.Union).?.data; |
| 1503 | |
| 1504 | if (layout.payload_size == 0) { |
| 1505 | const tag_di_ty = try o.lowerDebugType(union_obj.tag_ty, .full); |
| 1506 | const di_fields = [_]*llvm.DIType{tag_di_ty}; |
| 1507 | const full_di_ty = dib.createStructType( |
| 1508 | compile_unit_scope, |
| 1509 | name.ptr, |
| 1510 | null, // file |
| 1511 | 0, // line |
| 1512 | ty.abiSize(target) * 8, // size in bits |
| 1513 | ty.abiAlignment(target) * 8, // align in bits |
| 1514 | 0, // flags |
| 1515 | null, // derived from |
| 1516 | &di_fields, |
| 1517 | di_fields.len, |
| 1518 | 0, // run time lang |
| 1519 | null, // vtable holder |
| 1520 | "", // unique id |
| 1521 | ); |
| 1522 | dib.replaceTemporary(fwd_decl, full_di_ty); |
| 1523 | // The recursive call to `lowerDebugType` via `makeEmptyNamespaceDIType` |
| 1524 | // means we can't use `gop` anymore. |
| 1525 | try o.di_type_map.putContext(gpa, ty, AnnotatedDITypePtr.initFull(full_di_ty), .{ .target = o.target }); |
| 1526 | return full_di_ty; |
| 1527 | } |
| 1528 | |
| 1529 | var di_fields: std.ArrayListUnmanaged(*llvm.DIType) = .{}; |
| 1530 | defer di_fields.deinit(gpa); |
| 1531 | |
| 1532 | try di_fields.ensureUnusedCapacity(gpa, union_obj.fields.count()); |
| 1533 | |
| 1534 | var it = union_obj.fields.iterator(); |
| 1535 | while (it.next()) |kv| { |
| 1536 | const field_name = kv.key_ptr.*; |
| 1537 | const field = kv.value_ptr.*; |
| 1538 | |
| 1539 | if (!field.ty.hasRuntimeBitsIgnoreComptime()) continue; |
| 1540 | |
| 1541 | const field_size = field.ty.abiSize(target); |
| 1542 | const field_align = field.normalAlignment(target); |
| 1543 | |
| 1544 | const field_name_copy = try gpa.dupeZ(u8, field_name); |
| 1545 | defer gpa.free(field_name_copy); |
| 1546 | |
| 1547 | di_fields.appendAssumeCapacity(dib.createMemberType( |
| 1548 | fwd_decl.toScope(), |
| 1549 | field_name_copy, |
| 1550 | null, // file |
| 1551 | 0, // line |
| 1552 | field_size * 8, // size in bits |
| 1553 | field_align * 8, // align in bits |
| 1554 | 0, // offset in bits |
| 1555 | 0, // flags |
| 1556 | try o.lowerDebugType(field.ty, .full), |
| 1557 | )); |
| 1558 | } |
| 1559 | |
| 1560 | const union_name = if (layout.tag_size == 0) "AnonUnion" else name.ptr; |
| 1561 | |
| 1562 | const union_di_ty = dib.createUnionType( |
| 1563 | compile_unit_scope, |
| 1564 | union_name, |
| 1565 | null, // file |
| 1566 | 0, // line |
| 1567 | ty.abiSize(target) * 8, // size in bits |
| 1568 | ty.abiAlignment(target) * 8, // align in bits |
| 1569 | 0, // flags |
| 1570 | di_fields.items.ptr, |
| 1571 | @intCast(c_int, di_fields.items.len), |
| 1572 | 0, // run time lang |
| 1573 | "", // unique id |
| 1574 | ); |
| 1575 | |
| 1576 | if (layout.tag_size == 0) { |
| 1577 | dib.replaceTemporary(fwd_decl, union_di_ty); |
| 1578 | // The recursive call to `lowerDebugType` means we can't use `gop` anymore. |
| 1579 | try o.di_type_map.putContext(gpa, ty, AnnotatedDITypePtr.initFull(union_di_ty), .{ .target = o.target }); |
| 1580 | return union_di_ty; |
| 1581 | } |
| 1582 | |
| 1583 | var tag_offset: u64 = undefined; |
| 1584 | var payload_offset: u64 = undefined; |
| 1585 | if (layout.tag_align >= layout.payload_align) { |
| 1586 | tag_offset = 0; |
| 1587 | payload_offset = std.mem.alignForwardGeneric(u64, layout.tag_size, layout.payload_align); |
| 1588 | } else { |
| 1589 | payload_offset = 0; |
| 1590 | tag_offset = std.mem.alignForwardGeneric(u64, layout.payload_size, layout.tag_align); |
| 1591 | } |
| 1592 | |
| 1593 | const tag_di = dib.createMemberType( |
| 1594 | fwd_decl.toScope(), |
| 1595 | "tag", |
| 1596 | null, // file |
| 1597 | 0, // line |
| 1598 | layout.tag_size * 8, |
| 1599 | layout.tag_align * 8, // align in bits |
| 1600 | tag_offset * 8, // offset in bits |
| 1601 | 0, // flags |
| 1602 | try o.lowerDebugType(union_obj.tag_ty, .full), |
| 1603 | ); |
| 1604 | |
| 1605 | const payload_di = dib.createMemberType( |
| 1606 | fwd_decl.toScope(), |
| 1607 | "payload", |
| 1608 | null, // file |
| 1609 | 0, // line |
| 1610 | layout.payload_size * 8, // size in bits |
| 1611 | layout.payload_align * 8, // align in bits |
| 1612 | payload_offset * 8, // offset in bits |
| 1613 | 0, // flags |
| 1614 | union_di_ty, |
| 1615 | ); |
| 1616 | |
| 1617 | const full_di_fields: [2]*llvm.DIType = |
| 1618 | if (layout.tag_align >= layout.payload_align) |
| 1619 | .{ tag_di, payload_di } else .{ payload_di, tag_di }; |
| 1620 | |
| 1621 | const full_di_ty = dib.createStructType( |
| 1622 | compile_unit_scope, |
| 1623 | name.ptr, |
| 1624 | null, // file |
| 1625 | 0, // line |
| 1626 | ty.abiSize(target) * 8, // size in bits |
| 1627 | ty.abiAlignment(target) * 8, // align in bits |
| 1628 | 0, // flags |
| 1629 | null, // derived from |
| 1630 | &full_di_fields, |
| 1631 | full_di_fields.len, |
| 1632 | 0, // run time lang |
| 1633 | null, // vtable holder |
| 1634 | "", // unique id |
| 1635 | ); |
| 1636 | dib.replaceTemporary(fwd_decl, full_di_ty); |
| 1637 | // The recursive call to `lowerDebugType` means we can't use `gop` anymore. |
| 1638 | try o.di_type_map.putContext(gpa, ty, AnnotatedDITypePtr.initFull(full_di_ty), .{ .target = o.target }); |
| 1639 | return full_di_ty; |
| 1560 | 1640 | }, |
| 1561 | 1641 | .Fn => { |
| 1562 | 1642 | const fn_info = ty.fnInfo(); |
Andrew Kelley <andrew@ziglang.org> 2022-03-28 16:43:24-07:00
src