diff options
Diffstat (limited to 'src/analyze.cpp')
| -rw-r--r-- | src/analyze.cpp | 296 |
1 files changed, 163 insertions, 133 deletions
diff --git a/src/analyze.cpp b/src/analyze.cpp index b1d362f6e9..b70e756f47 100644 --- a/src/analyze.cpp +++ b/src/analyze.cpp @@ -2372,7 +2372,10 @@ static Error resolve_union_alignment(CodeGen *g, ZigType *union_type) { if (field->gen_index == UINT32_MAX) continue; - AstNode *align_expr = field->decl_node->data.struct_field.align_expr; + AstNode *align_expr = nullptr; + if (union_type->data.unionation.decl_node->type == NodeTypeContainerDecl) { + align_expr = field->decl_node->data.struct_field.align_expr; + } if (align_expr != nullptr) { if (!analyze_const_align(g, &union_type->data.unionation.decls_scope->base, align_expr, &field->align)) @@ -2468,9 +2471,6 @@ static Error resolve_union_type(CodeGen *g, ZigType *union_type) { AstNode *decl_node = union_type->data.unionation.decl_node; - - assert(decl_node->type == NodeTypeContainerDecl); - uint32_t field_count = union_type->data.unionation.src_field_count; TypeUnionField *most_aligned_union_member = union_type->data.unionation.most_aligned_union_member; @@ -3055,7 +3055,6 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) { return ErrorNone; AstNode *decl_node = union_type->data.unionation.decl_node; - assert(decl_node->type == NodeTypeContainerDecl); if (union_type->data.unionation.resolve_loop_flag_zero_bits) { if (union_type->data.unionation.resolve_status != ResolveStatusInvalid) { @@ -3069,30 +3068,50 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) { union_type->data.unionation.resolve_loop_flag_zero_bits = true; - assert(union_type->data.unionation.fields == nullptr); - uint32_t field_count = (uint32_t)decl_node->data.container_decl.fields.length; - if (field_count == 0) { - add_node_error(g, decl_node, buf_sprintf("unions must have 1 or more fields")); + uint32_t field_count; + if (decl_node->type == NodeTypeContainerDecl) { + assert(union_type->data.unionation.fields == nullptr); + field_count = (uint32_t)decl_node->data.container_decl.fields.length; + if (field_count == 0) { + add_node_error(g, decl_node, buf_sprintf("unions must have 1 or more fields")); + union_type->data.unionation.src_field_count = field_count; + union_type->data.unionation.resolve_status = ResolveStatusInvalid; + return ErrorSemanticAnalyzeFail; + } union_type->data.unionation.src_field_count = field_count; - union_type->data.unionation.resolve_status = ResolveStatusInvalid; - return ErrorSemanticAnalyzeFail; + union_type->data.unionation.fields = heap::c_allocator.allocate<TypeUnionField>(field_count); + union_type->data.unionation.fields_by_name.init(field_count); + } else { + assert(union_type->data.unionation.fields != nullptr); + field_count = union_type->data.unionation.src_field_count; } - union_type->data.unionation.src_field_count = field_count; - union_type->data.unionation.fields = heap::c_allocator.allocate<TypeUnionField>(field_count); - union_type->data.unionation.fields_by_name.init(field_count); Scope *scope = &union_type->data.unionation.decls_scope->base; HashMap<BigInt, AstNode *, bigint_hash, bigint_eql> occupied_tag_values = {}; - AstNode *enum_type_node = decl_node->data.container_decl.init_arg_expr; - union_type->data.unionation.have_explicit_tag_type = decl_node->data.container_decl.auto_enum || - enum_type_node != nullptr; - bool auto_layout = (union_type->data.unionation.layout == ContainerLayoutAuto); - bool want_safety = (field_count >= 2) && (auto_layout || enum_type_node != nullptr) && !(g->build_mode == BuildModeFastRelease || g->build_mode == BuildModeSmallRelease); + bool is_auto_enum; // union(enum) or union(enum(expr)) + bool is_explicit_enum; // union(expr) + AstNode *enum_type_node; // expr in union(enum(expr)) or union(expr) + if (decl_node->type == NodeTypeContainerDecl) { + is_auto_enum = decl_node->data.container_decl.auto_enum; + is_explicit_enum = decl_node->data.container_decl.init_arg_expr != nullptr; + enum_type_node = decl_node->data.container_decl.init_arg_expr; + } else { + is_auto_enum = false; + is_explicit_enum = union_type->data.unionation.tag_type != nullptr; + enum_type_node = nullptr; + } + union_type->data.unionation.have_explicit_tag_type = is_auto_enum || is_explicit_enum; + + bool is_auto_layout = union_type->data.unionation.layout == ContainerLayoutAuto; + bool want_safety = (field_count >= 2) + && (is_auto_layout || is_explicit_enum) + && !(g->build_mode == BuildModeFastRelease || g->build_mode == BuildModeSmallRelease); ZigType *tag_type; - bool create_enum_type = decl_node->data.container_decl.auto_enum || (enum_type_node == nullptr && want_safety); + bool create_enum_type = is_auto_enum || (!is_explicit_enum && want_safety); bool *covered_enum_fields; + bool *is_zero_bits = heap::c_allocator.allocate<bool>(field_count); ZigLLVMDIEnumerator **di_enumerators; if (create_enum_type) { occupied_tag_values.init(field_count); @@ -3150,105 +3169,111 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) { return err; } tag_type = enum_type; - covered_enum_fields = heap::c_allocator.allocate<bool>(enum_type->data.enumeration.src_field_count); } else { - tag_type = nullptr; + if (decl_node->type == NodeTypeContainerDecl) { + tag_type = nullptr; + } else { + tag_type = union_type->data.unionation.tag_type; + } + } + if (tag_type != nullptr) { + covered_enum_fields = heap::c_allocator.allocate<bool>(tag_type->data.enumeration.src_field_count); } union_type->data.unionation.tag_type = tag_type; - uint32_t gen_field_index = 0; for (uint32_t i = 0; i < field_count; i += 1) { - AstNode *field_node = decl_node->data.container_decl.fields.at(i); - Buf *field_name = field_node->data.struct_field.name; TypeUnionField *union_field = &union_type->data.unionation.fields[i]; - union_field->name = field_node->data.struct_field.name; - union_field->decl_node = field_node; - union_field->gen_index = UINT32_MAX; - - auto field_entry = union_type->data.unionation.fields_by_name.put_unique(union_field->name, union_field); - if (field_entry != nullptr) { - ErrorMsg *msg = add_node_error(g, field_node, - buf_sprintf("duplicate union field: '%s'", buf_ptr(union_field->name))); - add_error_note(g, msg, field_entry->value->decl_node, buf_sprintf("other field here")); - union_type->data.unionation.resolve_status = ResolveStatusInvalid; - return ErrorSemanticAnalyzeFail; - } + if (decl_node->type == NodeTypeContainerDecl) { + AstNode *field_node = decl_node->data.container_decl.fields.at(i); + union_field->name = field_node->data.struct_field.name; + union_field->decl_node = field_node; + union_field->gen_index = UINT32_MAX; + is_zero_bits[i] = false; - bool field_is_zero_bits; - if (field_node->data.struct_field.type == nullptr) { - if (decl_node->data.container_decl.auto_enum || - decl_node->data.container_decl.init_arg_expr != nullptr) - { - union_field->type_entry = g->builtin_types.entry_void; - field_is_zero_bits = true; - } else { - add_node_error(g, field_node, buf_sprintf("union field missing type")); - union_type->data.unionation.resolve_status = ResolveStatusInvalid; - return ErrorSemanticAnalyzeFail; - } - } else { - ZigValue *field_type_val = analyze_const_value(g, scope, - field_node->data.struct_field.type, g->builtin_types.entry_type, nullptr, LazyOkNoUndef); - if (type_is_invalid(field_type_val->type)) { + auto field_entry = union_type->data.unionation.fields_by_name.put_unique(union_field->name, union_field); + if (field_entry != nullptr) { + ErrorMsg *msg = add_node_error(g, union_field->decl_node, + buf_sprintf("duplicate union field: '%s'", buf_ptr(union_field->name))); + add_error_note(g, msg, field_entry->value->decl_node, buf_sprintf("other field here")); union_type->data.unionation.resolve_status = ResolveStatusInvalid; return ErrorSemanticAnalyzeFail; } - assert(field_type_val->special != ConstValSpecialRuntime); - union_field->type_val = field_type_val; - if (union_type->data.unionation.resolve_status == ResolveStatusInvalid) - return ErrorSemanticAnalyzeFail; - bool field_is_opaque_type; - if ((err = type_val_resolve_is_opaque_type(g, field_type_val, &field_is_opaque_type))) { - union_type->data.unionation.resolve_status = ResolveStatusInvalid; - return ErrorSemanticAnalyzeFail; - } - if (field_is_opaque_type) { - add_node_error(g, field_node, - buf_create_from_str( - "opaque types have unknown size and therefore cannot be directly embedded in unions")); - union_type->data.unionation.resolve_status = ResolveStatusInvalid; - return ErrorSemanticAnalyzeFail; - } + if (field_node->data.struct_field.type == nullptr) { + if (is_auto_enum || is_explicit_enum) { + union_field->type_entry = g->builtin_types.entry_void; + is_zero_bits[i] = true; + } else { + add_node_error(g, field_node, buf_sprintf("union field missing type")); + union_type->data.unionation.resolve_status = ResolveStatusInvalid; + return ErrorSemanticAnalyzeFail; + } + } else { + ZigValue *field_type_val = analyze_const_value(g, scope, + field_node->data.struct_field.type, g->builtin_types.entry_type, nullptr, LazyOkNoUndef); + if (type_is_invalid(field_type_val->type)) { + union_type->data.unionation.resolve_status = ResolveStatusInvalid; + return ErrorSemanticAnalyzeFail; + } + assert(field_type_val->special != ConstValSpecialRuntime); + union_field->type_val = field_type_val; + if (union_type->data.unionation.resolve_status == ResolveStatusInvalid) + return ErrorSemanticAnalyzeFail; - switch (type_val_resolve_requires_comptime(g, field_type_val)) { - case ReqCompTimeInvalid: - if (g->trace_err != nullptr) { - g->trace_err = add_error_note(g, g->trace_err, field_node, - buf_create_from_str("while checking this field")); - } + bool field_is_opaque_type; + if ((err = type_val_resolve_is_opaque_type(g, field_type_val, &field_is_opaque_type))) { union_type->data.unionation.resolve_status = ResolveStatusInvalid; return ErrorSemanticAnalyzeFail; - case ReqCompTimeYes: - union_type->data.unionation.requires_comptime = true; - break; - case ReqCompTimeNo: - break; - } + } + if (field_is_opaque_type) { + add_node_error(g, field_node, + buf_create_from_str( + "opaque types have unknown size and therefore cannot be directly embedded in unions")); + union_type->data.unionation.resolve_status = ResolveStatusInvalid; + return ErrorSemanticAnalyzeFail; + } - if ((err = type_val_resolve_zero_bits(g, field_type_val, union_type, nullptr, &field_is_zero_bits))) { - union_type->data.unionation.resolve_status = ResolveStatusInvalid; - return ErrorSemanticAnalyzeFail; + switch (type_val_resolve_requires_comptime(g, field_type_val)) { + case ReqCompTimeInvalid: + if (g->trace_err != nullptr) { + g->trace_err = add_error_note(g, g->trace_err, field_node, + buf_create_from_str("while checking this field")); + } + union_type->data.unionation.resolve_status = ResolveStatusInvalid; + return ErrorSemanticAnalyzeFail; + case ReqCompTimeYes: + union_type->data.unionation.requires_comptime = true; + break; + case ReqCompTimeNo: + break; + } + + if ((err = type_val_resolve_zero_bits(g, field_type_val, union_type, nullptr, &is_zero_bits[i]))) { + union_type->data.unionation.resolve_status = ResolveStatusInvalid; + return ErrorSemanticAnalyzeFail; + } } - } - if (field_node->data.struct_field.value != nullptr && !decl_node->data.container_decl.auto_enum) { - ErrorMsg *msg = add_node_error(g, field_node->data.struct_field.value, - buf_create_from_str("untagged union field assignment")); - add_error_note(g, msg, decl_node, buf_create_from_str("consider 'union(enum)' here")); + if (field_node->data.struct_field.value != nullptr && !is_auto_enum) { + ErrorMsg *msg = add_node_error(g, field_node->data.struct_field.value, + buf_create_from_str("untagged union field assignment")); + add_error_note(g, msg, decl_node, buf_create_from_str("consider 'union(enum)' here")); + } } if (create_enum_type) { - di_enumerators[i] = ZigLLVMCreateDebugEnumerator(g->dbuilder, buf_ptr(field_name), i); + di_enumerators[i] = ZigLLVMCreateDebugEnumerator(g->dbuilder, buf_ptr(union_field->name), i); union_field->enum_field = &tag_type->data.enumeration.fields[i]; - union_field->enum_field->name = field_name; + union_field->enum_field->name = union_field->name; union_field->enum_field->decl_index = i; - union_field->enum_field->decl_node = field_node; + union_field->enum_field->decl_node = union_field->decl_node; auto prev_entry = tag_type->data.enumeration.fields_by_name.put_unique(union_field->enum_field->name, union_field->enum_field); assert(prev_entry == nullptr); // caught by union de-duplicator above - AstNode *tag_value = field_node->data.struct_field.value; + AstNode *tag_value = decl_node->type == NodeTypeContainerDecl + ? union_field->decl_node->data.struct_field.value : nullptr; + // In this first pass we resolve explicit tag values. // In a second pass we will fill in the unspecified ones. if (tag_value != nullptr) { @@ -3276,11 +3301,11 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) { return ErrorSemanticAnalyzeFail; } } - } else if (enum_type_node != nullptr) { - union_field->enum_field = find_enum_type_field(tag_type, field_name); + } else if (tag_type != nullptr) { + union_field->enum_field = find_enum_type_field(tag_type, union_field->name); if (union_field->enum_field == nullptr) { - ErrorMsg *msg = add_node_error(g, field_node, - buf_sprintf("enum field not found: '%s'", buf_ptr(field_name))); + ErrorMsg *msg = add_node_error(g, union_field->decl_node, + buf_sprintf("enum field not found: '%s'", buf_ptr(union_field->name))); add_error_note(g, msg, tag_type->data.enumeration.decl_node, buf_sprintf("enum declared here")); union_type->data.unionation.resolve_status = ResolveStatusInvalid; @@ -3289,21 +3314,23 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) { covered_enum_fields[union_field->enum_field->decl_index] = true; } else { union_field->enum_field = heap::c_allocator.create<TypeEnumField>(); - union_field->enum_field->name = field_name; + union_field->enum_field->name = union_field->name; union_field->enum_field->decl_index = i; bigint_init_unsigned(&union_field->enum_field->value, i); } assert(union_field->enum_field != nullptr); + } - if (field_is_zero_bits) - continue; - - union_field->gen_index = gen_field_index; - gen_field_index += 1; + uint32_t gen_field_index = 0; + for (uint32_t i = 0; i < field_count; i += 1) { + TypeUnionField *union_field = &union_type->data.unionation.fields[i]; + if (!is_zero_bits[i]) { + union_field->gen_index = gen_field_index; + gen_field_index += 1; + } } - bool src_have_tag = decl_node->data.container_decl.auto_enum || - decl_node->data.container_decl.init_arg_expr != nullptr; + bool src_have_tag = is_auto_enum || is_explicit_enum; if (src_have_tag && union_type->data.unionation.layout != ContainerLayoutAuto) { const char *qual_str; @@ -3317,8 +3344,7 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) { qual_str = "extern"; break; } - AstNode *source_node = (decl_node->data.container_decl.init_arg_expr != nullptr) ? - decl_node->data.container_decl.init_arg_expr : decl_node; + AstNode *source_node = enum_type_node != nullptr ? enum_type_node : decl_node; add_node_error(g, source_node, buf_sprintf("%s union does not support enum tag type", qual_str)); union_type->data.unionation.resolve_status = ResolveStatusInvalid; @@ -3326,43 +3352,47 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) { } if (create_enum_type) { - // Now iterate again and populate the unspecified tag values - uint32_t next_maybe_unoccupied_index = 0; + if (decl_node->type == NodeTypeContainerDecl) { + // Now iterate again and populate the unspecified tag values + uint32_t next_maybe_unoccupied_index = 0; - for (uint32_t field_i = 0; field_i < field_count; field_i += 1) { - AstNode *field_node = decl_node->data.container_decl.fields.at(field_i); - TypeUnionField *union_field = &union_type->data.unionation.fields[field_i]; - AstNode *tag_value = field_node->data.struct_field.value; + for (uint32_t field_i = 0; field_i < field_count; field_i += 1) { + AstNode *field_node = decl_node->data.container_decl.fields.at(field_i); + TypeUnionField *union_field = &union_type->data.unionation.fields[field_i]; + AstNode *tag_value = field_node->data.struct_field.value; - if (tag_value == nullptr) { - if (occupied_tag_values.size() == 0) { - bigint_init_unsigned(&union_field->enum_field->value, next_maybe_unoccupied_index); - next_maybe_unoccupied_index += 1; - } else { - BigInt proposed_value; - for (;;) { - bigint_init_unsigned(&proposed_value, next_maybe_unoccupied_index); + if (tag_value == nullptr) { + if (occupied_tag_values.size() == 0) { + bigint_init_unsigned(&union_field->enum_field->value, next_maybe_unoccupied_index); next_maybe_unoccupied_index += 1; - auto entry = occupied_tag_values.put_unique(proposed_value, field_node); - if (entry != nullptr) { - continue; + } else { + BigInt proposed_value; + for (;;) { + bigint_init_unsigned(&proposed_value, next_maybe_unoccupied_index); + next_maybe_unoccupied_index += 1; + auto entry = occupied_tag_values.put_unique(proposed_value, field_node); + if (entry != nullptr) { + continue; + } + break; } - break; + bigint_init_bigint(&union_field->enum_field->value, &proposed_value); } - bigint_init_bigint(&union_field->enum_field->value, &proposed_value); } } } - } else if (enum_type_node != nullptr) { + } else if (tag_type != nullptr) { for (uint32_t i = 0; i < tag_type->data.enumeration.src_field_count; i += 1) { TypeEnumField *enum_field = &tag_type->data.enumeration.fields[i]; if (!covered_enum_fields[i]) { - AstNode *enum_decl_node = tag_type->data.enumeration.decl_node; - AstNode *field_node = enum_decl_node->data.container_decl.fields.at(i); ErrorMsg *msg = add_node_error(g, decl_node, buf_sprintf("enum field missing: '%s'", buf_ptr(enum_field->name))); - add_error_note(g, msg, field_node, - buf_sprintf("declared here")); + if (decl_node->type == NodeTypeContainerDecl) { + AstNode *enum_decl_node = tag_type->data.enumeration.decl_node; + AstNode *field_node = enum_decl_node->data.container_decl.fields.at(i); + add_error_note(g, msg, field_node, + buf_sprintf("declared here")); + } union_type->data.unionation.resolve_status = ResolveStatusInvalid; } } @@ -8350,7 +8380,7 @@ static void resolve_llvm_types_struct(CodeGen *g, ZigType *struct_type, ResolveS ZigLLVMDIFile *di_file; ZigLLVMDIScope *di_scope; unsigned line; - if (decl_node != nullptr && !struct_type->data.structure.created_by_at_type) { + if (decl_node != nullptr) { Scope *scope = &struct_type->data.structure.decls_scope->base; ZigType *import = get_scope_import(scope); di_file = import->data.structure.root_struct->di_file; @@ -8713,7 +8743,7 @@ static void resolve_llvm_types_union(CodeGen *g, ZigType *union_type, ResolveSta uint64_t store_size_in_bits = union_field->type_entry->size_in_bits; uint64_t abi_align_in_bits = 8*union_field->type_entry->abi_align; - AstNode *field_node = decl_node->data.container_decl.fields.at(i); + AstNode *field_node = union_field->decl_node; union_inner_di_types[union_field->gen_index] = ZigLLVMCreateDebugMemberType(g->dbuilder, ZigLLVMTypeToScope(union_type->llvm_di_type), buf_ptr(union_field->enum_field->name), import->data.structure.root_struct->di_file, (unsigned)(field_node->line + 1), |