PR c++/12333 - X::~X() with implicit this->.

[thirdparty/gcc.git] / gcc / cp / ChangeLog

2019-12-17  Jason Merrill  <jason@redhat.com>

        PR c++/12333 - X::~X() with implicit this->.
        * parser.c (cp_parser_lookup_name): Use lookup_destructor.
        * typeck.c (lookup_destructor): No longer static.

2019-12-17  Martin Sebor  <msebor@redhat.com>

        PR c++/61339
        * parser.c (cp_parser_maybe_warn_enum_key): New function.
        (class_decl_loc_t): New class.
        (cp_parser_elaborated_type_specifier): Call
        cp_parser_maybe_warn_enum_key.
        (cp_parser_class_head): Call cp_parser_check_class_key.
        (cp_parser_check_class_key): Add arguments.  Call class_decl_loc_t::add.
        (c_parse_file): Call class_decl_loc_t::diag_mismatched_tags.

2019-12-17  Jason Merrill  <jason@redhat.com>

        PR c++/79592 - missing explanation of invalid constexpr.
        * constexpr.c (register_constexpr_fundef): Do store the body of a
        template instantiation that is not potentially constant.
        (explain_invalid_constexpr_fn): Look it up.
        (cxx_eval_call_expression): Check fundef->result.

2019-12-17  Jason Merrill  <jason@redhat.com>

        PR c++/92576 - redeclaration of variable template.
        * decl.c (redeclaration_error_message): Recurse for variable
        templates.

2019-12-17  Jason Merrill  <jason@redhat.com>

        * name-lookup.c (get_std_name_hint): Add std::byte.

2019-12-17  Jakub Jelinek  <jakub@redhat.com>

        PR c++/59655
        * pt.c (push_tinst_level_loc): If limit_bad_template_recursion,
        set TREE_NO_WARNING on tldcl.
        * decl2.c (no_linkage_error): Treat templates with TREE_NO_WARNING
        as defined during error recovery.

2019-12-13  Jason Merrill  <jason@redhat.com>

        PR c++/91165 - verify_gimple ICE with cached constexpr.
        * constexpr.c (cxx_bind_parameters_in_call): Don't unshare.
        (cxx_eval_call_expression): Unshare all args if we're caching.

2019-12-12  Jason Merrill  <jason@redhat.com>

        PR c++/92496 - ICE with <=> and no #include <compare>.
        * typeck.c (cp_build_binary_op): Handle error from spaceship_type.

2019-12-11  David Malcolm  <dmalcolm@redhat.com>

        * cxx-pretty-print.c (cxx_pretty_printer::clone): New vfunc
        implementation.
        * cxx-pretty-print.h (cxx_pretty_printer::clone): New vfunc decl.
        * error.c (cxx_format_postprocessor::clone): New vfunc.

2019-12-11  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92869
        * class.c (finish_struct): For C++17 and earlier, check
        type_has_user_provided_or_explicit_constructor rather than
        TYPE_HAS_USER_CONSTRUCTOR whether to set CLASSTYPE_NON_AGGREGATE.

2019-12-11  Marek Polacek  <polacek@redhat.com>

        PR c++/92878 - Parenthesized init of aggregates in new-expression.
        * init.c (build_new_1): Handle parenthesized initialization of
        aggregates in new-expression.

2019-12-11  Jason Merrill  <jason@redhat.com>

        PR c++/92105 - decltype(decltype) error cascade.
        * parser.c (cp_parser_decltype_expr): Don't tentative_firewall here.
        (cp_parser_decltype): Do it here.  Remember a non-tentative error.

        PR c++/57082 - new X{} and private destructor.
        * init.c (build_new_1): Also pass tf_no_cleanup to
        build_special_member_call.

        PR c++/92774 - ICE with implicitly deleted operator<=>.
        * method.c (comp_info::~comp_info): Factor out of...
        (build_comparison_op): Here.  Handle error return from build_new_op.

        PR c++/92859 - ADL and bit-field.
        * name-lookup.c: Use unlowered_expr_type.

        PR c++/92446 - deduction of class NTTP.
        * pt.c (deducible_expression): Look through VIEW_CONVERT_EXPR.

2019-12-10  Jason Merrill  <jason@redhat.com>

        PR c++/92847 - C++20 comparison ambiguity with class template.
        * call.c (cand_parms_match): Handle all templated functions.

        Fix C++20 structural type vs. private base.
        * class.c (build_base_field_1): Take access parameter.
        (build_base_field): Likewise.
        (build_base_fields, layout_virtual_bases): Pass it.
        * tree.c (structural_type_p): Improve private base diagnostic.

        PR c++/92560 - ICE with decltype and rewritten operator.
        * call.c (build_new_op_1): Clear tf_decltype on inner call.

2019-12-09  David Malcolm  <dmalcolm@redhat.com>

        * error.c (range_label_for_type_mismatch::get_text): Replace
        label_text ctor calls with label_text::borrow.

2019-12-09  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (check_for_casting_away_constness): Add location_t
        parameter and use it.
        (maybe_warn_about_useless_cast): Likewise.
        (maybe_warn_about_cast_ignoring_quals): Likewise.
        (build_static_cast_1): Likewise.
        (build_static_cast): Likewise; sets the location of the returned tree.
        (build_reinterpret_cast_1): Likewise.
        (build_reinterpret_cast): Likewise; sets the location of the returned
        tree.
        (build_const_cast_1): Likewise.
        (build_const_cast): Likewise; sets the location of the returned tree.
        (cp_build_c_cast): Likewise.
        (build_c_cast): Adjust.
        (build_ptrmemfunc): Adjust calls.
        (cp_build_unary_op): Pass the location to invert_truthvalue_loc.
        * rtti.c (build_dynamic_cast_1): Add location_t parameter and
        use it.
        (build_dynamic_cast): Likewise.
        * cp-tree.h: Adjust declarations.
        * parser.c (cp_parser_postfix_expression): Pass cp_cast_loc to
        the various build_*_cast functions.
        (get_cast_suggestion): Adjust calls.
        (cp_parser_builtin_offsetof): Likewise.
        * decl.c (reshape_init): Adjust call.
        * method.c (forward_parm): Likewise.
        (build_comparison_op): Likewise.
        * pt.c (tsubst_copy_and_build): Likewise.
        * semantics.c (finish_omp_reduction_clause): Likewise.
        (cp_omp_finish_iterators): Likewise.
        * tree.c (cp_stabilize_reference): Likewise.
        (move): Likewise.
        * typeck2.c (build_functional_cast): Likewise.

        * typeck2.c (build_functional_cast_1): New.
        (build_functional_cast_1): Calls the latter and sets the location
        of the returned tree.

2019-12-08  Jakub Jelinek  <jakub@redhat.com>

        * cvt.c (maybe_warn_nodiscard): Add workaround for GCC 3.4-4.4 - cast
        msg to (const char *) in conditional expressions.  Formatting fixes.

2019-12-07  Jason Merrill  <jason@redhat.com>
            Jakub Jelinek  <jakub@redhat.com>

        PR c++/92831
        * call.c (build_conditional_expr_1): For ?: with omitted middle
        operand use cp_stabilize_reference if arg1 is glvalue_p rather than
        just if it is lvalue_p.

2019-12-06  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (cp_parser_diagnose_invalid_type_name): Mention
        that concept is also available with -std=c++2a.

        PR c++/92831 - CWG 1299, not extending temporary lifetime for ?:
        * cp-tree.h (extend_ref_init_temps): Add a new argument with NULL
        default arg.
        * call.c (set_up_extended_ref_temp): Add COND_GUARD argument, pass it
        down to extend_ref_init_temps.  Before pushing cleanup, if COND_GUARD
        is non-NULL, create a bool temporary if needed, initialize to false
        and guard the cleanup with the temporary being true.
        (extend_ref_init_temps_1): Add COND_GUARD argument, pass it down
        to recursive calls and set_up_extended_ref_temp.  Handle COND_EXPR.
        (extend_ref_init_temps): Add COND_GUARD argument, pass it down to
        recursive calls and to extend_ref_init_temps_1.

2019-12-06  Richard Sandiford  <richard.sandiford@arm.com>

        * decl.c (start_decl_1): Use verify_type_context to check whether
        the target allows variables of a particular type to have static
        or thread-local storage duration.
        (check_array_initializer): Use verify_type_context to check whether
        the target allows a particular type to be used as an array element.
        (create_array_type_for_decl): Likewise.
        (cp_finish_decl): Use verify_type_context to check whether
        the target allows static member variables of a particular type.
        (grokdeclarator): Likewise.  Also use verify_type_context to check
        whether the target allows non-static member variables of a particular
        type.
        * except.c: Include target.h.
        (is_admissible_throw_operand_or_catch_parameter): Use
        verify_type_context to check whether the target allows particular
        types to be thrown and caught.
        * typeck2.c (add_exception_specifier): Likewise.
        * init.c (build_new_1): Use verify_type_context to check whether
        the target allows particular types to be dynamically allocated.
        (build_vec_delete_1, build_delete): Use verify_type_context to check
        whether the target allows particular types to be deleted.
        * lambda.c (add_capture): Use verify_type_context to check
        whether the target allows particular types to be captured by copy.
        * pt.c: Include target.h.
        (instantiate_class_template_1): Use verify_type_context to check
        whether the target allows non-static member variables of a particular
        type.
        * typeck.c (cxx_alignof_expr): Use verify_type_context to check
        whether the target allows the alignment of a particular type
        to be measured.
        (pointer_diff, cp_build_unary_op): Use verify_type_context to check
        whether the target allows arithmetic involving pointers to particular
        types.

2019-12-05  Marek Polacek  <polacek@redhat.com>
            Jakub Jelinek  <jakub@redhat.com>

        PR c++/91353 - P1331R2: Allow trivial default init in constexpr contexts.
        * class.c (trivial_default_constructor_is_constexpr): Return true in
        C++20.
        * constexpr.c (cx_check_missing_mem_inits): Allow missing field
        initializers in C++20.
        (cxx_eval_call_expression): Don't clear CONSTRUCTOR_NO_CLEARING for
        constexpr constructors in C++20.
        (reduced_constant_expression_p): Don't set FIELD for union and array
        types.  Skip empty class fields without initializers.
        * decl.c (check_for_uninitialized_const_var): Permit trivial default
        initialization in constexpr.
        (next_initializable_field): Don't skip vptr fields.
        * method.c (walk_field_subobs): Still consider a constructor that
        doesn't initialize all the members constexpr.

2019-12-05  Marek Polacek  <polacek@redhat.com>

        PR c++/92271 - make __is_same alias for __is_same_as.
        * cxx-pretty-print.c (pp_cxx_trait_expression) <case CPTK_IS_SAME_AS>:
        Print "__is_same".

2019-12-05  David Edelsohn  <dje.gcc@gmail.com>

        * cp-gimplify.c: Include memmodel.h.

2019-12-05  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck2.c (build_functional_cast): Add location_t parameter
        and use it.
        * cp-tree.h: Update declaration.
        * parser.c (cp_parser_functional_cast): Adjust call.
        * call.c (build_op_delete_call): Likewise.
        (build_new_method_call_1): Likewise.
        * decl.c (check_initializer): Likewise.
        * pt.c (tsubst_copy_and_build): Likewise.
        * semantics.c (finish_compound_literal): Likewise.

2019-12-04  David Edelsohn  <dje.gcc@gmail.com>

        * cp-gimplify.c: Include tm_p.h.

2019-12-04  Marek Polacek  <polacek@redhat.com>

        * parser.c (enum primary_constraint_error): Remove stray comma.

2019-12-04  Richard Sandiford  <richard.sandiford@arm.com>

        * cp-tree.h (CP_AGGREGATE_TYPE_P): Check for gnu_vector_type_p
        instead of VECTOR_TYPE.
        * call.c (build_conditional_expr_1): Restrict vector handling
        to vectors that satisfy gnu_vector_type_p.
        * cvt.c (ocp_convert): Only allow vectors to be converted
        to bool if they satisfy gnu_vector_type_p.
        (build_expr_type_conversion): Only allow conversions from
        vectors if they satisfy gnu_vector_type_p.
        * typeck.c (cp_build_binary_op): Only allow binary operators to be
        applied to vectors if they satisfy gnu_vector_type_p.
        (cp_build_unary_op): Likewise unary operators.
        (build_reinterpret_cast_1):

2019-12-03  Jakub Jelinek  <jakub@redhat.com>

        * cp-tree.h (enum cp_tree_index): Add CPTI_SOURCE_LOCATION_IMPL.
        (source_location_impl): Define.
        (enum cp_built_in_function): Add CP_BUILT_IN_SOURCE_LOCATION.
        (fold_builtin_source_location): Declare.
        * cp-gimplify.c: Include output.h, file-prefix-map.h and cgraph.h.
        (cp_gimplify_expr, cp_fold): Handle CP_BUILT_IN_SOURCE_LOCATION.
        Formatting fix.
        (get_source_location_impl_type): New function.
        (struct source_location_table_entry,
        struct source_location_table_entry_hash): New types.
        (source_location_table, source_location_id): New variables.
        (fold_builtin_source_location): New function.
        * constexpr.c (cxx_eval_builtin_function_call): Handle
        CP_BUILT_IN_SOURCE_LOCATION.
        * tree.c (builtin_valid_in_constant_expr_p): Likewise.  Formatting
        fix.
        * decl.c (cxx_init_decl_processing): Register
        __builtin_source_location.
        * name-lookup.c (get_std_name_hint): Add source_location entry.

2019-12-03  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (cp_build_addr_expr_1): Use the cp_expr_loc_or_input_loc
        location in a few additional diagnostics; tidy.
        (check_return_expr): Likewise.

        * typeck.c (cp_build_addr_expr_1): Use tree_strip_any_location_wrapper
        for the address of main pedwarn.

2019-12-03  Jakub Jelinek  <jakub@redhat.com>

        PR c++/91369
        * constexpr.c (struct constexpr_global_ctx): Add cleanups member,
        initialize it in the ctor.
        (cxx_eval_constant_expression) <case TARGET_EXPR>: If TARGET_EXPR_SLOT
        is already in the values hash_map, don't evaluate it again.  Put
        TARGET_EXPR_SLOT into hash_map even if not lval, and push it into
        save_exprs too.  If there is TARGET_EXPR_CLEANUP and not
        CLEANUP_EH_ONLY, push the cleanup to cleanups vector.
        <case CLEANUP_POINT_EXPR>: Save outer cleanups, set cleanups to
        local auto_vec, after evaluating the body evaluate cleanups and
        restore previous cleanups.
        <case TRY_CATCH_EXPR>: Don't crash if the first operand is NULL_TREE.
        (cxx_eval_outermost_constant_expr): Set cleanups to local auto_vec,
        after evaluating the expression evaluate cleanups.

2019-12-03  Marek Polacek  <polacek@redhat.com>

        PR c++/91363 - P0960R3: Parenthesized initialization of aggregates.
        * call.c (build_new_method_call_1): Handle parenthesized initialization
        of aggregates by building up a CONSTRUCTOR.
        (extend_ref_init_temps): Do nothing for CONSTRUCTOR_IS_PAREN_INIT.
        * cp-tree.h (CONSTRUCTOR_IS_PAREN_INIT, LOOKUP_AGGREGATE_PAREN_INIT):
        Define.
        * decl.c (grok_reference_init): Handle aggregate initialization from
        a parenthesized list of values.
        (reshape_init): Do nothing for CONSTRUCTOR_IS_PAREN_INIT.
        (check_initializer): Handle initialization of an array from a
        parenthesized list of values.  Use NULL_TREE instead of NULL.
        * tree.c (build_cplus_new): Handle BRACE_ENCLOSED_INITIALIZER_P.
        * typeck2.c (digest_init_r): Set LOOKUP_AGGREGATE_PAREN_INIT if it
        receives a CONSTRUCTOR with CONSTRUCTOR_IS_PAREN_INIT set.  Allow
        narrowing when LOOKUP_AGGREGATE_PAREN_INIT.
        (massage_init_elt): Don't lose LOOKUP_AGGREGATE_PAREN_INIT when passing
        flags to digest_init_r.

2019-12-03  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92732
        * typeck2.c (digest_nsdmi_init): For bitfields, use
        DECL_BIT_FIELD_TYPE instead of TREE_TYPE.

2019-12-03  Jason Merrill  <jason@redhat.com>
            Jakub Jelinek  <jakub@redhat.com>

        PR c++/92705
        * call.c (strip_standard_conversion): New function.
        (build_new_op_1): Use it for user_conv_p.
        (compare_ics): Likewise.
        (source_type): Likewise.

2019-12-03  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92695
        * constexpr.c (cxx_bind_parameters_in_call): For virtual calls,
        adjust the first argument to point to the derived object rather
        than its base.

2019-12-02  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92695
        * constexpr.c (cxx_eval_constant_expression) <case OBJ_TYPE_REF>: Use
        STRIP_NOPS before checking for ADDR_EXPR.

2019-11-29  Jakub Jelinek  <jakub@redhat.com>

        PR c++/60228
        * parser.c (cp_parser_omp_declare_reduction_exprs): If
        processing_template_decl, wrap the combiner or initializer
        into EXPR_STMT.
        * decl.c (start_preparsed_function): Don't start a lambda scope
        for DECL_OMP_DECLARE_REDUCTION_P functions.
        (finish_function): Don't finish a lambda scope for
        DECL_OMP_DECLARE_REDUCTION_P functions, nor cp_fold_function
        them nor cp_genericize them.
        * mangle.c (decl_mangling_context): Look through
        DECL_OMP_DECLARE_REDUCTION_P functions.
        * semantics.c (expand_or_defer_fn_1): For DECL_OMP_DECLARE_REDUCTION_P
        functions, use tentative linkage, don't keep their bodies with
        -fkeep-inline-functions and return false at the end.

2019-11-28  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92695
        * decl2.c (mark_used): Don't call note_vague_linkage_fn for pure
        virtual functions, even if they are declared inline.

2019-11-16  Jason Merrill  <jason@redhat.com>

        Implement P1814R0, CTAD for alias templates.
        * pt.c (rewrite_tparm_list): Factor out of build_deduction_guide.
        (maybe_aggr_guide): Check for copy-init here.
        (alias_ctad_tweaks, deduction_guides_for): New.
        (ctor_deduction_guides_for): Factor out of do_class_deduction.
        (ctad_template_p): New.
        * parser.c (cp_parser_simple_type_specifier): Use it.
        * constraint.cc (append_constraint): New.

2019-11-16  Jason Merrill  <jason@redhat.com>

        * cxx-pretty-print.c (pp_cxx_unqualified_id): Handle alias
        template-id.
        * pt.c (complex_alias_template_p): True if constraints.
        (get_underlying_template, tsubst): Check alias constraints.
        (push_template_decl_real): Set alias constraints here.
        * parser.c (cp_parser_alias_declaration): Not here.
        * constraint.cc (get_constraints): Take const_tree.

2019-11-12  Jason Merrill  <jason@redhat.com>

        PR c++/92206 - ICE with typedef to dependent alias.
        * pt.c (dependent_alias_template_spec_p)
        (alias_template_specialization_p): Add transparent_typedefs
        parameter.
        (iterative_hash_template_arg, any_template_parm_r)
        (primary_template_specialization_p, tsubst, dependent_type_p_r):
        Adjust.
        * decl.c (check_elaborated_type_specifier): Adjust.
        * error.c (dump_template_bindings, dump_aggr_type): Adjust.

2019-11-27  Andrew Sutton  <asutton@lock3software.com>

        PR c++/92236
        Defer evaluation of concept checks so that static assertions can
        emit more detailed diagnostics.
        * constexpr.c (cxx_eval_call_expression): Handle concept checks.
        (cxx_eval_constant_expression): Diagnose misuse of function concepts
        as template-id expressions. Follow the usual return path for results.
        (cxx_eval_outermost_constant_expr): Avoid calling
        cp_get_callee_fndecl_nofold for function concepts.
        * constraint.cc (build_function_check): Fully type the concept check
        so that we don't ICE in conversions.
        * cp-gimplify.c (cp_genericize_r) [CALL_EXPR]: Handle concept checks.
        [TEMPLATE_ID_EXPR] Likewise.
        * cvt.c (convert_to_void): Always evaluate concept checks so we don't
        accidentally ignore them. Substitution during satisfaction can make
        a program ill-formed (example in g++.dg/cpp2a/concepts6.C).
        * pt.c (tsubst_copy_and_build): [CALL_EXPR]: Don't evaluate concepts.
        [TEMPLATE_ID_EXPR]: Likewise.
        * semantics.c (finish_call_expr): Don't evaluate concepts.
        (finish_id_expression_1): Likewise.
        (finish_static_assert): Preserve the original condition so we can
        diagnose concept errors when a check returns false.

2019-11-27  Andrew Sutton  <asutton@lock3software.com>

        PR c++/92439
        Improve quality of diagnostics for subexpressions that need parens.
        * parser.c (cp_parser_requires_clause_opt): Add a flag to indicate
        when parsing a requires-clause before lambda parameters, and...
        (cp_parser_lambda_declarator_opt): ... use that here ...
        (cp_parser_type_parameter): ... and here ...
        (cp_parser_late_return_type_opt): ... and here ...
        (cp_parser_explicit_template_declaration): ... and here.
        (cp_parser_diagnose_ungrouped_constraint_plain): Adjust the message
        because this can apply to subexpressions that are not immediately
        after a requires-clause.
        (cp_parser_diagnose_ungrouped_constraint_rich): Likewise.
        (primary_constraint_error): New.
        (cp_parser_constraint_requires_parens): New.
        (cp_parser_unary_constraint_requires_parens): New.
        (cp_parser_constraint_primary_expression): Check for unary expressions
        before parsing the primary expression. Also check for binary and
        postfix operators after a successful parse of the primary expression.
        Force a re-parse if the result would form a lower-precedence string.
        (cp_parser_constraint_logical_and_expression): Propagate lambda flag;
        move checks for ill-formed constraints into the constraint primary
        expression.
        (cp_parser_constraint_logical_or_expression): Likewise.
        (cp_parser_requires_clause_expression): Propagate lambda flag.

2019-11-27  Andrew Sutton  <asutton@lock3software.com>

        PR c++/88395
        * constraint.cc (satisfy_declaration_constraints): Push tinst levels
        around satisfaction.

2019-11-27  Andrew Sutton  <asutton@lock3software.com>

        Diagnose certain constraint errors as hard errors, but otherwise treat
        them the same as normal SFINAE-type errors. Also, generally clean up
        the satisfaction functions.

        * constexpr.c (cxx_eval_constant_expression): Use
        evaluate_concept_check.
        * constraint.cc (normalize_concept_definition): Accept a diagnostic
        flag and only cache when not diagnosing errors.
        (decl_satisfied_cache): Map to trees instead of bools.
        (satisfy_atom): Guarantee a location for the errors, propagate complain
        flags to force_rvalue, and emit errors for non-boolean constraints.
        (get_normalized_constraints_and_args): New overloads. Factored out of
        satisfy_constraint_expression and satisfy_declaration_constraints.
        (satisfy_constraint_expression): Propagate diagnostic info to
        normalization.
        (satisfy_declaration_constraints): New. Factored out of
        constraints_satisfied_p.
        (constraint_satisfaction_value): New. Calls
        satisfy_constraint_expression or satisfy_declaration_constraints.
        (constraints_satisfied_p): Call constraint_satisfaction_value.
        (evaluate_concept_check): Don't take tsubst_falgs_t. Replay
        satisfaction if an error is encountered.
        (current_failed_constraint): Moved from pt.c.
        (diagnose_constraints): Call constraint_satisfaction_value.
        * cp-tree.h: Update declarations.
        * pt.c (current_failed_constraint): Moved to constraint.cc.
        * semantics.c (finish_id_expression_1): Remove a duplicate case.

2019-11-27  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92524
        * tree.c (replace_placeholders_r): Don't walk constructor elts with
        RANGE_EXPR indexes.

2019-11-26  Jason Merrill  <jason@redhat.com>

        * pt.c (tsubst_copy_and_build) [TEMPLATE_ID_EXPR]: Remember the
        location of a variable template-id.
        * constexpr.c (cxx_eval_constant_expression): Get expr location
        before stripping location wrappers.
        (non_const_var_error): Take location argument.

2019-11-26  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (cp_build_unary_op): Consistently use the accurate
        location in seven additional diagnostic messages.
        (cp_build_compound_expr): Use cp_expr_loc_or_input_loc in one place.

2019-11-26  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92648
        * parser.c (cp_parser_std_attribute): For unknown attributes,
        skip balanced token seq instead of trying to parse
        attribute-argument-clause as expression list.  Formatting fix.

        PR c++/61414
        * class.c (enum_to_min_precision): New hash_map.
        (enum_min_precision): New function.
        (check_bitfield_decl): Use it.

2019-11-25  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (cp_build_indirect_ref_1): Add location_t parameter
        and use it in error messages.
        (build_x_indirect_ref): Adjust call.
        (build_indirect_ref): Likewise.
        (cp_build_fold_indirect_ref): Likewise.
        (cp_build_array_ref): Likewise.
        * call.c (build_new_op_1): Likewise.
        * semantics.c (finish_omp_clauses): Likewise.
        (finish_omp_depobj): Likewise.
        * typeck2.c (build_x_arrow): Likewise.
        * cp-tree.h (cp_build_indirect_ref): Update declaration.

        * call.c (build_new_op_1): Use location argument in warning_at.

        * typeck.c (cp_build_modify_expr): Consistently use the
        location_t argument.

2019-11-23  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR c++/92365
        * name-lookup.c (check_local_shadow): Use can_convert_arg
        instead of can_convert.

2019-11-22  Marek Polacek  <polacek@redhat.com>

        PR c++/88337 - P1327R1: Allow polymorphic typeid in constexpr.
        * constexpr.c (potential_constant_expression_1): Allow a typeid
        expression whose operand is of polymorphic type in constexpr in
        C++20.
        * rtti.c (build_typeid): Remove obsolete FIXME comment.

2019-11-22  Jakub Jelinek  <jakub@redhat.com>

        PR c/90677
        * cp-objcp-common.c (identifier_global_tag): Define.

        PR c++/92458
        * init.c (nsdmi_inst): Change type to
        decl_tree_cache_map * from tree_cache_map *.
        * constraint.cc (decl_constraints): Likewise.
        * decl.c (get_tuple_decomp_init): Likewise.
        * pt.c (defarg_inst, explicit_specifier_map): Likewise.
        (tsubst_default_argument, store_explicit_specifier): Use
        decl_tree_cache_map::create_ggc rather than
        tree_cache_map::create_ggc.
        * cp-objcp-common.c (debug_type_map): Change type to
        type_tree_cache_map * from tree_cache_map *.

2019-11-21  Marek Polacek  <polacek@redhat.com>

        PR c++/92450 - ICE with invalid nested name specifier.
        * parser.c (cp_parser_member_declaration): Don't attempt to print
        erroneous bit-field diagnostic if grokdeclarator returns
        error_mark_node.

2019-11-21  Jakub Jelinek  <jakub@redhat.com>
            Jason Merrill  <jason@redhat.com>

        PR c++/90842
        * parser.c (cp_parser_decl_specifier_seq): For concept or typedef
        break early if CP_PARSER_FLAGS_ONLY_MUTABLE_OR_CONSTEXPR.
        For type specifiers, set CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS
        if CP_PARSER_FLAGS_ONLY_MUTABLE_OR_CONSTEXPR is set.

2019-11-20  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck2.c (build_x_arrow): Early return if decay_conversion
        returns error_mark_node.

2019-11-20  Jakub Jelinek  <jakub@redhat.com>

        PR c++/90767
        * call.c (complain_about_no_candidates_for_method_call): If
        conv->from is not a type, pass to complain_about_bad_argument
        lvalue_type of conv->from.

2019-11-20  Paolo Carlini  <paolo.carlini@oracle.com>

        * cvt.c (ocp_convert): Use additional warning sentinel.

2019-11-19  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92414
        * constexpr.c (cxx_eval_outermost_constant_expr): If DECL_INITIAL
        on object is erroneous, return t without trying to evaluate
        a constexpr dtor.

2019-11-12  Jason Merrill  <jason@redhat.com>

        * call.c (same_fn_or_template): Change to cand_parms_match.
        (joust): Adjust.
        (print_z_candidate): Mark rewritten/reversed candidates.
        (build_new_op_1): Warn about recursive call with reversed arguments.

2019-11-15  Andrew Sutton  <asutton@lock3software.com>

        PR c++/89913
        * pt.c (get_underlying_template): Exit loop if the original type
        of the alias is null.

2019-11-19  Andrew Sutton  <asutton@lock3software.com>

        PR c++/92078
        * pt.c (maybe_new_partial_specialization): Apply access to newly
        created partial specializations. Update comment style.

2019-11-19  Andrew Sutton  <asutton@lock3software.com>

        PR c++/92078
        * pt.c (maybe_new_partial_specialization): Apply access to newly
        created partial specializations. Update comment style.

2019-11-19  Andrew Sutton  <asutton@lock3software.com>

        PR c++/92403
        Suppress diagnostics substituting into a requires-expression.
        * pt.c (tsubst_copy_and_build): Perform the first substitution without
        diagnostics and a second only if tsubst_requries_expr returns an error.

2019-11-19  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92504
        * semantics.c (handle_omp_for_class_iterator): Don't call
        cp_fully_fold on cond.

2019-11-18  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (cp_build_addr_expr_1): Use cp_expr_loc_or_input_loc
        in three places.
        (cxx_sizeof_expr): Use it in one additional place.
        (cxx_alignof_expr): Likewise.
        (lvalue_or_else): Likewise.

2019-11-18  Marek Polacek  <polacek@redhat.com>

        PR c++/91962 - ICE with reference binding and qualification conversion.
        * call.c (convert_like_real) <case ck_ref_bind>: Check need_temporary_p.

2019-11-17  Jakub Jelinek  <jakub@redhat.com>

        * method.c (lookup_comparison_result): Use %qD instead of %<%T::%D%>
        to print the decl.
        (lookup_comparison_category): Use %qD instead of %<std::%D%> to print
        the decl.

2019-11-15  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (cp_truthvalue_conversion): Add tsubst_flags_t parameter
        and use it in calls; also pass the location_t of the expression to
        cp_build_binary_op and c_common_truthvalue_conversion.
        * rtti.c (build_dynamic_cast_1): Adjust call.
        * cvt.c (ocp_convert): Likewise.
        * cp-gimplify.c (cp_fold): Likewise.
        * cp-tree.h (cp_truthvalue_conversion): Update declaration.

2019-11-14  Jason Merrill  <jason@redhat.com>

        Implement P1816R0, class template argument deduction for aggregates.
        * pt.c (maybe_aggr_guide, collect_ctor_idx_types): New.
        (is_spec_or_derived): Split out from do_class_deduction.
        (build_deduction_guide): Handle aggregate guide.
        * class.c (finish_struct): Set CLASSTYPE_NON_AGGREGATE in a
        template.
        * cp-tree.h (CP_AGGREGATE_TYPE_P): An incomplete class is not an
        aggregate.

2019-11-14  Richard Sandiford  <richard.sandiford@arm.com>

        * call.c (build_conditional_expr_1): Use truth_type_for instead
        of build_same_sized_truth_vector_type.
        * typeck.c (build_vec_cmp): Likewise.

2019-11-14  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (cp_parser_omp_context_selector): Don't require score
        argument to fit into shwi, just to be INTEGER_CST.  Diagnose
        negative score.
        * pt.c (tsubst_attribute): Likewise.

        * parser.c (cp_parser_omp_context_selector): Rename
        CTX_PROPERTY_IDLIST to CTX_PROPERTY_NAME_LIST, add CTX_PROPERTY_ID.
        Use CTX_PROPERTY_ID for atomic_default_mem_order, only allow a single
        identifier in that.  For CTX_PROPERTY_NAME_LIST, allow identifiers
        and string literals.
        * pt.c (tsubst_attribute): Fix up STRING_CST handling if allow_string.

2019-11-13  Marek Polacek  <polacek@redhat.com>

        PR c++/89070 - bogus [[nodiscard]] warning in SFINAE.
        * cvt.c (convert_to_void): Guard maybe_warn_nodiscard calls with
        tf_warning.

2019-11-13  Richard Sandiford  <richard.sandiford@arm.com>

        PR c++/92206
        * cp-tree.h (STF_STRIP_DEPENDENT): New constant.
        * tree.c (strip_typedefs): Add STF_STRIP_DEPENDENT to the flags
        when calling strip_typedefs recursively on a DECL_ORIGINAL_TYPE.
        Don't apply the fix for DR1558 in that case; allow aliases with
        dependent template parameters to be stripped instead.

2019-11-12  Nathan Sidwell  <nathan@acm.org>

        * name-lookup.c (lookup_using_decl): New function, merged from ...
        (do_class_using_decl): ... here.  Call it.  And ...
        (finish_nonmember_using_decl): ... here.  Call it.

2019-11-12  Martin Liska  <mliska@suse.cz>

        * name-lookup.c: Do not include params.h.
        * typeck.c: Likewise.

2019-11-12  Martin Liska  <mliska@suse.cz>

        * name-lookup.c (namespace_hints::namespace_hints): Replace old
        parameter syntax with the new one, include opts.h if needed.  Use
        SET_OPTION_IF_UNSET macro.
        * typeck.c (comptypes): Likewise.

2019-11-12  Maciej W. Rozycki  <macro@codesourcery.com>
            Frederik Harwath  <frederik@codesourcery.com>

        gcc/cp/
        * constexpr.c (potential_constant_expression_1): Handle
        OACC_SERIAL.
        * parser.c (OACC_SERIAL_CLAUSE_MASK): New macro.
        (cp_parser_oacc_kernels_parallel): Rename function to...
        (cp_parser_oacc_compute): ... this.  Handle PRAGMA_OACC_SERIAL.
        (cp_parser_omp_construct): Update accordingly.
        (cp_parser_pragma): Handle PRAGMA_OACC_SERIAL.  Fix alphabetic
        order.
        * pt.c (tsubst_expr): Handle OACC_SERIAL.

2019-11-11  Jason Merrill  <jason@redhat.com>

        Implement P1946R0, Allow defaulting comparisons by value.
        * method.c (early_check_defaulted_comparison): Accept by-value,
        reject mixed by-value and by-reference parms.
        * decl.c (grokdeclarator): Set funcdef_flag for defaulted friend.
        * decl2.c (grokfield): Don't SET_DECL_FRIEND_CONTEXT.

        * typeck.c (cp_build_binary_op): Sorry about <=> on VECTOR_TYPE.

2019-11-11  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92447
        * decl.c (finish_function): Move ctype initialization before
        DECL_DELETED_FN handling.

        * semantics.c (finish_translation_unit): Diagnose declare target
        without corresponding end declare target.

2019-11-10  Jason Merrill  <jason@redhat.com>

        Implement D1957R0, T* to bool should be considered narrowing.
        * typeck2.c (check_narrowing): Treat pointer->bool as a narrowing
        conversion with -std=c++2a.

2019-11-08  Marek Polacek  <polacek@redhat.com>

        PR c++/92215 - flawed diagnostic for bit-field with non-integral type.
        * parser.c (cp_parser_member_declaration): Add a diagnostic for
        bit-fields with non-integral types.

2019-11-08  Jakub Jelinek  <jakub@redhat.com>

        * init.c (build_vec_delete_1): Fix a comment typo - mist -> must.

2019-11-07  Jason Merrill  <jason@redhat.com>

        Implement D1959R0, remove weak_equality and strong_equality.
        * method.c (enum comp_cat_tag, comp_cat_info): Remove *_equality.
        (genericize_spaceship, common_comparison_type): Likewise.
        * typeck.c (cp_build_binary_op): Move SPACESHIP_EXPR to be with the
        relational operators, exclude other types no longer supported.

2019-11-06  Jason Merrill  <jason@redhat.com>

        Implement D1907R1 "structural type".
        * tree.c (structural_type_p): New.
        * pt.c (invalid_nontype_parm_type_p): Use it.
        * class.c (build_base_field_1): Take binfo.  Copy TREE_PRIVATE.
        (build_base_field): Pass binfo.

        PR c++/92150 - partial specialization with class NTTP.
        * pt.c (unify): Handle VIEW_CONVERT_EXPR.

        * pt.c (use_pack_expansion_extra_args_p): Still do substitution if
        all packs are simple pack expansions.
        (add_extra_args): Check that the extra args aren't dependent.

2019-11-06  Andrew Sutton  <asutton@lock3software.com>

        Use satisfaction with nested requirements.
        * constraint.cc (build_parameter_mapping): Use
        current_template_parms when the declaration is not available.
        (norm_info::norm_info) Make explicit.
        (normalize_constraint_expression): Factor into a separate overload
        that takes arguments, and use that in the original function.
        (tsubst_nested_requirement): Use satisfy_constraint instead of
        trying to evaluate this as a constant expression.
        (finish_nested_requirement): Keep the normalized constraint and the
        original normalization arguments with the requirement.
        (diagnose_nested_requirement): Use satisfy_constraint. Tentatively
        implement more comprehensive diagnostics, but do not enable.
        * parser.c (cp_parser_requires_expression): Relax requirement that
        requires-expressions can live only inside templates.
        * pt.c (any_template_parm_r): Look into type of PARM_DECL.

2019-11-06  Jason Merrill  <jason@redhat.com>

        C++20 NB CA378 - Remove constrained non-template functions.
        * decl.c (grokfndecl): Reject constraints on non-templated function.

2019-11-06  Matthias Kretz  <m.kretz@gsi.de>

        * parser.c (cp_parser_operator): Parse operator?: as an
        attempt to overload the conditional operator.

2019-11-05  Jason Merrill  <jason@redhat.com>

        Implement C++20 operator<=>.
        * cp-tree.h (struct lang_decl_fn): Add maybe_deleted bitfield.
        (DECL_MAYBE_DELETED): New.
        (enum special_function_kind): Add sfk_comparison.
        (LOOKUP_REWRITTEN, LOOKUP_REVERSED): New.
        * call.c (struct z_candidate): Add rewritten and reversed methods.
        (add_builtin_candidate): Handle SPACESHIP_EXPR.
        (add_builtin_candidates): Likewise.
        (add_candidates): Don't add a reversed candidate if the parms are
        the same.
        (add_operator_candidates): Split out from build_new_op_1.  Handle
        rewritten and reversed candidates.
        (add_candidate): Swap conversions of reversed candidate.
        (build_new_op_1): Swap them back.  Build a second operation for
        rewritten candidates.
        (extract_call_expr): Handle rewritten calls.
        (same_fn_or_template): New.
        (joust): Handle rewritten and reversed candidates.
        * class.c (add_implicitly_declared_members): Add implicit op==.
        (classtype_has_op, classtype_has_defaulted_op): New.
        * constexpr.c (cxx_eval_binary_expression): Handle SPACESHIP_EXPR.
        (cxx_eval_constant_expression, potential_constant_expression_1):
        Likewise.
        * cp-gimplify.c (genericize_spaceship): New.
        (cp_genericize_r): Use it.
        * cp-objcp-common.c (cp_common_init_ts): Handle SPACESHIP_EXPR.
        * decl.c (finish_function): Handle deleted function.
        * decl2.c (grokfield): SET_DECL_FRIEND_CONTEXT on defaulted friend.
        (mark_used): Check DECL_MAYBE_DELETED.  Remove assumption that
        defaulted functions are non-static members.
        * error.c (dump_expr): Handle SPACESHIP_EXPR.
        * method.c (type_has_trivial_fn): False for sfk_comparison.
        (enum comp_cat_tag, struct comp_cat_info_t): New types.
        (comp_cat_cache): New array variable.
        (lookup_comparison_result, lookup_comparison_category)
        (is_cat, cat_tag_for, spaceship_comp_cat)
        (spaceship_type, genericize_spaceship)
        (common_comparison_type, early_check_defaulted_comparison)
        (comp_info, build_comparison_op): New.
        (synthesize_method): Handle sfk_comparison.  Handle deleted.
        (get_defaulted_eh_spec, maybe_explain_implicit_delete)
        (explain_implicit_non_constexpr, implicitly_declare_fn)
        (defaulted_late_check, defaultable_fn_check): Handle sfk_comparison.
        * name-lookup.c (get_std_name_hint): Add comparison categories.
        * tree.c (special_function_p): Add sfk_comparison.
        * typeck.c (cp_build_binary_op): Handle SPACESHIP_EXPR.

2019-11-05  Tim van Deurzen  <tim@kompiler.org>

        Add new tree code for the spaceship operator.
        * cp-tree.def: Add new tree code.
        * operators.def: New binary operator.
        * parser.c: Add new token and tree code.

2019-09-15  Jason Merrill  <jason@redhat.com>

        * call.c (build_new_op_1): Don't apply any standard conversions to
        the operands of a built-in operator.  Don't suppress conversions in
        cp_build_unary_op.
        * typeck.c (cp_build_unary_op): Do integral promotions for enums.

2019-11-04  Jason Merrill  <jason@redhat.com>

        Use vec instead of raw array for built-in candidates.
        * call.c (build_builtin_candidate): Take args in a vec.
        (add_builtin_candidate, add_builtin_candidates): Likewise.
        (build_conditional_expr_1, build_new_op_1): Adjust.

2019-11-04  Jason Merrill  <jason@redhat.com>

        * constexpr.c (explain_invalid_constexpr_fn): Show location of fn.

        * pt.c (maybe_instantiate_noexcept): Only update clones if we
        instantiated.

        * typeck.c (contextual_conv_bool): New.

        * name-lookup.c (lookup_qualified_name): Add wrapper overload taking
        C string rather than identifier.
        * parser.c (cp_parser_userdef_numeric_literal): Use it.
        * rtti.c (emit_support_tinfos): Use it.
        * cp-tree.h (ovl_op_identifier): Change to inline functions.
        (build_x_binary_op): Add wrapper with fewer parms.

2019-11-05  Jason Merrill  <jason@redhat.com>

        * decl2.c (mark_used): Diagnose use of a function with unsatisfied
        constraints here.
        * typeck.c (cp_build_function_call_vec): Not here.

2019-11-05  Nathan Sidwell  <nathan@acm.org>

        PR c++/92370
        * parser.c (cp_parser_error_1): Check EOF and UNKNOWN_LOCATION
        when skipping over version control marker.

2019-11-05  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92343
        * constexpr.c (potential_constant_expression_1): Return true rather
        than false for PREDICT_EXPR.

        * decl.c (omp_declare_variant_finalize_one): Call
        declare_simd_adjust_this not just on the context, but also on the
        variant-id expression for methods.  Don't call
        cp_get_callee_fndecl_nofold, call cp_get_callee and only if it is
        safe cp_get_fndecl_from_callee.  Don't try to print as %qD
        NULL in diagnostics.
        * pt.c (tsubst_attribute): Handle "omp declare variant base"
        attribute.
        (tsubst_function_decl): Call omp_declare_variant_finalize
        if there are any "omp declare variant base" attributes left.

2019-11-04  Kamlesh Kumar  <kamleshbhalui@gmail.com>

        PR c++/91979 - mangling nullptr expression
        * mangle.c (write_template_arg_literal): Handle nullptr
        mangling.

2019-11-04  Jason Merrill  <jason@redhat.com>

        * typeck.c (check_return_expr): Avoid redundant error.

2019-11-02  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (composite_pointer_type): Add a const op_location_t&
        parameter and use it in diagnostics.
        (composite_pointer_error): Likewise.
        (composite_pointer_type_r): Add a const op_location_t&
        parameter and forward it.
        (cp_build_binary_op): Adjust calls.
        (common_pointer_type): Likewise.
        * call.c (add_builtin_candidate): Likewise.
        (build_conditional_expr_1): Likewise.
        * cp-tree.h (composite_pointer_type): Update declaration.

        * typeck.c (cxx_sizeof_expr): Use cp_expr_loc_or_input_loc
        in permerror.
        (cxx_alignof_expr): Likewise.
        (lvalue_or_else): Likewise.

2019-11-02  Jakub Jelinek  <jakub@redhat.com>

        * decl.c (omp_declare_variant_finalize_one): Use
        omp_get_context_selector instead of c_omp_get_context_selector.

        PR c++/89640
        * parser.c (cp_parser_decl_specifier_seq): Don't parse attributes
        if CP_PARSER_FLAGS_ONLY_MUTABLE_OR_CONSTEXPR.

        PR c++/88335 - Implement P1073R3: Immediate functions
        * cp-tree.h (struct lang_decl_fn): Add immediate_fn_p bit.
        (DECL_IMMEDIATE_FUNCTION_P, SET_DECL_IMMEDIATE_FUNCTION_P): Define.
        (enum cp_decl_spec): Add ds_consteval.
        (fold_non_dependent_expr): Add another tree argument defaulted to
        NULL_TREE.
        * name-lookup.h (struct cp_binding_level): Add immediate_fn_ctx_p
        member.
        * parser.c (cp_keyword_starts_decl_specifier_p): Adjust comments
        for C++11 and C++20 specifiers.  Handle RID_CONSTEVAL.
        (CP_PARSER_FLAGS_ONLY_MUTABLE_OR_CONSTEXPR): Adjust comment.
        (CP_PARSER_FLAGS_CONSTEVAL): New.
        (cp_parser_skip_balanced_tokens): New forward declaration.
        (cp_parser_lambda_declarator_opt): Handle ds_consteval.  Set
        current_binding_level->immediate_fn_ctx_p before parsing parameter
        list if decl-specifier-seq contains consteval specifier.
        (cp_parser_decl_specifier_seq): Handle RID_CONSTEVAL.
        (cp_parser_explicit_instantiation): Diagnose explicit instantiation
        with consteval specifier.
        (cp_parser_init_declarator): For consteval or into flags
        CP_PARSER_FLAGS_CONSTEVAL.
        (cp_parser_direct_declarator): If CP_PARSER_FLAGS_CONSTEVAL, set
        current_binding_level->immediate_fn_ctx_p in the sk_function_parms
        scope.
        (set_and_check_decl_spec_loc): Add consteval entry, formatting fix.
        * call.c (build_addr_func): For direct calls to immediate functions
        use build_address rather than decay_conversion.
        (build_over_call): Evaluate immediate function invocations.
        * error.c (dump_function_decl): Handle DECL_IMMEDIATE_FUNCTION_P.
        * semantics.c (expand_or_defer_fn_1): Use tentative linkage and don't
        call mark_needed for immediate functions.
        * typeck.c (cxx_sizeof_or_alignof_expr): Likewise.  Formatting fix.
        (cp_build_addr_expr_1): Reject taking address of immediate function
        outside of immediate function.
        * decl.c (validate_constexpr_redeclaration): Diagnose consteval
        vs. non-consteval or vice versa redeclaration.  Use
        SET_DECL_IMMEDIATE_FUNCTION_P if new_decl is immediate function.
        (check_tag_decl): Use %qs with keyword string to simplify translation.
        Handle ds_consteval.
        (start_decl): Adjust diagnostics for static or thread_local variables
        in immediate functions.
        (grokfndecl): Call sorry_at on virtual consteval.  Use %qs with keyword
        to string to simplify translation.  Diagnose consteval main.  Use
        SET_DECL_IMMEDIATE_FUNCTION_P for consteval.
        (grokdeclarator): Handle consteval.  Use %qs with keyword strings to
        simplify translation.  Use separate ifs instead of chained else if
        for invalid specifiers.  For constinit clear constinit_p rather than
        constexpr_p.
        * constexpr.c (find_immediate_fndecl): New function.
        (cxx_eval_outermost_constant_expr): Allow consteval calls returning
        void.  Diagnose returning address of immediate function from consteval
        evaluation.
        (fold_non_dependent_expr_template): Add OBJECT argument, pass it
        through to cxx_eval_outermost_constant_expr.
        (fold_non_dependent_expr): Add OBJECT argument, pass it through to
        fold_non_dependent_expr_template.
        (fold_non_dependent_init): Adjust fold_non_dependent_expr_template
        caller.
        * method.c (defaulted_late_check): Adjust diagnostics for consteval.
        * lambda.c (maybe_add_lambda_conv_op): Copy over
        DECL_DECLARED_CONSTEXPR_P and DECL_IMMEDIATE_FUNCTION_P bits from
        callop to both artificial functions.
        * init.c (build_value_init): Don't do further processing if
        build_special_member_call returned a TREE_CONSTANT.  Formatting fix.

        PR c++/91369 - Implement P0784R7: constexpr new
        * cp-tree.h (CALL_FROM_NEW_OR_DELETE_P): Define.
        * init.c (build_new_1, build_vec_delete_1, build_delete): Set
        CALL_FROM_NEW_OR_DELETE_P on the CALL_EXPR to allocator functions.
        * constexpr.c (is_std_allocator_allocate): Only allow
        global replaceable allocator functions if CALL_FROM_NEW_OR_DELETE_P
        or in std::allocate<T>::{,de}allocate.
        (potential_constant_expression_1): Likewise.

2019-11-01  Nathan Sidwell  <nathan@acm.org>

        * class.c (check_field_decls): Refactor.

2019-10-31  Jakub Jelinek  <jakub@redhat.com>

        PR c++/90947
        * cp-tree.h (type_initializer_zero_p): Declare.
        * decl.c (reshape_init_array_1): Formatting fix.
        * tree.c (type_initializer_zero_p): New function.  Moved from
        ../tree.c, use next_initializable_field, formatting fix.  Return
        false for TYPE_NON_AGGREGATE_CLASS types.

2019-10-30  Jason Merrill  <jason@redhat.com>

        PR c++/92268 - hard error satisfying return-type-requirement
        * constraint.cc (type_deducible_p): Check for substitution failure.
        (diagnose_compound_requirement): Adjust diagnostic.
        * pt.c (do_auto_deduction): Don't pass cargs to
        constraints_satisfied_p.

2019-10-30  Jakub Jelinek  <jakub@redhat.com>

        PR c++/91369 - Implement P0784R7: constexpr new
        * constexpr.c (cxx_replaceable_global_alloc_fn): Don't return true
        for placement new.
        (cxx_placement_new_fn, is_std_construct_at): New functions.
        (cxx_eval_call_expression): Allow placement new in std::construct_at.
        (potential_constant_expression_1): Likewise.

        * typeck.c (decl_in_std_namespace_p): Return true also for decls
        in inline namespaces inside of std namespace.

2019-10-30  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR c++/92024
        * name-lookup.c (check_local_shadow): Shadowing TYPE_DECLs
        is always a -Wshadow=compatible-local warning, unless
        -Wshadow is used.

2019-10-30  Jason Merrill  <jason@redhat.com>

        * cxx-pretty-print.c (get_fold_operator): Use OVL_OP_INFO.

2019-10-30  Marek Polacek  <polacek@redhat.com>

        PR c++/92134 - constinit malfunction in static data member.
        * decl2.c (grokfield): Set LOOKUP_CONSTINIT.

2019-10-30  Jakub Jelinek  <jakub@redhat.com>

        * cp-tree.h (omp_declare_variant_finalize, build_local_temp): Declare.
        * decl.c: Include omp-general.h.
        (declare_simd_adjust_this): Add forward declaration.
        (omp_declare_variant_finalize_one, omp_declare_variant_finalize): New
        function.
        (cp_finish_decl, finish_function): Call omp_declare_variant_finalize.
        * parser.c (cp_finish_omp_declare_variant): Adjust parsing of the
        variant id-expression and propagate enough information to
        omp_declare_variant_finalize_one in the attribute so that it can
        finalize it.
        * class.c (finish_struct): Call omp_declare_variant_finalize.
        * tree.c (build_local_temp): No longer static, remove forward
        declaration.

2019-10-30  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (cp_build_modify_expr): Prefer error + inform to
        error + error in one place.
        (get_delta_difference_1): Likewise.
        (get_delta_difference): Likewise, in two places.

2019-10-29  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (build_x_unary_op): Use the location_t argument in
        three error_at.

2019-10-29  Marek Polacek  <polacek@redhat.com>

        PR c++/90998 - ICE with copy elision in init by ctor and -Wconversion.
        * call.c (joust): Don't attempt to warn if ->second_conv is null.

2019-10-29  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92201
        * cp-gimplify.c (cp_gimplify_expr): If gimplify_to_rvalue changes the
        function pointer type, re-add cast to the original one.

2019-10-29  Marek Polacek  <polacek@redhat.com>

        PR c++/91548 - fix detecting modifying const objects for ARRAY_REF.
        * constexpr.c (cxx_eval_store_expression): Don't call
        modifying_const_object_p for ARRAY_REF.

2019-10-29  Richard Sandiford  <richard.sandiford@arm.com>

        * cp-objcp-common.h (cxx_simulate_enum_decl): Declare.
        (LANG_HOOKS_SIMULATE_ENUM_DECL): Define to the above.
        * decl.c (cxx_simulate_enum_decl): New function.

2019-10-29  Richard Sandiford  <richard.sandiford@arm.com>

        * cp-tree.h (cxx_simulate_builtin_function_decl): Declare.
        * decl.c (cxx_simulate_builtin_function_decl): New function.
        * cp-objcp-common.h (LANG_HOOKS_SIMULATE_BUILTIN_FUNCTION_DECL):
        Define to the above.

2019-10-28  Martin Sebor  <msebor@redhat.com>

        PR c/66970
        * cp-objcp-common.c (names_builtin_p): Define new function.

2019-10-28  Nathan Sidwell  <nathan@acm.org>

        * parser.h (struct cp_token): Drop {ENUM,BOOL}_BITFIELD C-ism.
        Add tree_check_p flag, use as nested union discriminator.
        (struct cp_lexer): Add saved_type & saved_keyword fields.
        * parser.c (eof_token): Delete.
        (cp_lexer_new_main): Always init last_token to last token of
        buffer.
        (cp_lexer_new_from_tokens): Overlay EOF token at end of range.
        (cp_lexer_destroy): Restore token under the EOF.
        (cp_lexer_previous_token_position): No check for eof_token here.
        (cp_lexer_get_preprocessor_token): Clear tree_check_p.
        (cp_lexer_peek_nth_token): Check CPP_EOF not eof_token.
        (cp_lexer_consume_token): Assert not CPP_EOF, no check for
        eof_token.
        (cp_lexer_purge_token): Likewise.
        (cp_lexer_purge_tokens_after): No check for EOF token.
        (cp_parser_nested_name_specifier, cp_parser_decltype)
        (cp_parser_template_id): Set tree_check_p.

2019-10-24  Jakub Jelinek  <jakub@redhat.com>

        * decl2.c (cplus_decl_attributes): Add "omp declare target block"
        attribute in between declare target and end declare target
        pragmas.

        * call.c (convert_arg_to_ellipsis): Add missing space in string
        literal.

2019-10-24  Marek Polacek  <polacek@redhat.com>

        * decl.c (reshape_init_r): Add missing space.

2019-10-24  Nathan Sidwell  <nathan@acm.org>

        * pt.c (reduce_template_parm_level): Attach the new TPI to the new
        DECL.
        (convert_generic_types_to_packs): Pass the copied type to
        reduce_templatE_parm_level.

2019-10-23  Nathan Sidwell  <nathan@acm.org>

        * cp-tree.c (CPTI_STD_IDENTIFIER): Delete.
        (std_identifier): Delete.
        (DECL_NAME_SPACE_STD_P): Compare against std_node.
        * decl.c (initialize_predefined_identifiers): 'std' is not needed.
        (cxx_init_decl_processing): Adjust creation of ::std.  Use
        {push,pop}_nested_namespace.
        (cxx_builtin_function): Use {push,pop}_nested_namespace.
        * except.c (init_exception_processing): Likewise.
        * rtti.c (init_rtti_processing): Likewise.

2019-10-23  Jason Merrill  <jason@redhat.com>

        Implement P1286R2, Contra CWG1778
        * method.c (defaulted_late_check): Don't check explicit
        exception-specification on defaulted function.
        (after_nsdmi_defaulted_late_checks): Remove.
        * parser.h (struct cp_unparsed_functions_entry): Remove classes.
        * parser.c (unparsed_classes): Remove.
        (push_unparsed_function_queues, cp_parser_class_specifier_1):
        Adjust.

2019-10-23  Jakub Jelinek  <jakub@redhat.com>

        * constexpr.c (cxx_eval_constant_expression) <case CLEANUP_STMT>:
        Temporarily change input_location to CLEANUP_STMT location.

2019-10-22  Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/85887
        * decl.c (expand_static_init): Drop ECF_LEAF from __cxa_guard_acquire
        and __cxa_guard_release.

2019-10-22  Marc Glisse  <marc.glisse@inria.fr>

        PR c++/85746
        * constexpr.c (cxx_eval_builtin_function_call): Only set
        force_folding_builtin_constant_p if manifestly_const_eval.

2019-10-22  Richard Sandiford  <richard.sandiford@arm.com>

        * cp-tree.h (STF_USER_VISIBLE): New constant.
        (strip_typedefs, strip_typedefs_expr): Take a flags argument.
        * tree.c (strip_typedefs, strip_typedefs_expr): Likewise,
        updating mutual calls accordingly.  When STF_USER_VISIBLE is true,
        only look through typedefs if user_facing_original_type_p.
        * error.c (dump_template_bindings, type_to_string): Pass
        STF_USER_VISIBLE to strip_typedefs.
        (dump_type): Likewise, unless pp_c_flag_gnu_v3 is set.

2019-10-21  Kamlesh Kumar  <kamleshbhalui@gmail.com>
            Jason Merrill  <jason@redhat.com>

        PR c++/83534 - typeinfo of noexcept function
        * rtti.c (get_tinfo_decl_dynamic): Do not call
        TYPE_MAIN_VARIANT for function.
        (get_typeid): Likewise.

2019-10-21  Paolo Carlini  <paolo.carlini@oracle.com>

        * parser.c (cp_parser_class_head): Improve error recovery upon
        extra qualification error.

2019-10-21  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92015
        * constexpr.c (cxx_eval_component_reference, cxx_eval_bit_field_ref):
        Use STRIP_ANY_LOCATION_WRAPPER on CONSTRUCTOR elts.

2019-10-21  Marek Polacek  <polacek@redhat.com>

        PR c++/92062 - ODR-use ignored for static member of class template.
        * pt.c (has_value_dependent_address): Strip location wrappers.

2019-10-21  Marek Polacek  <polacek@redhat.com>

        PR c++/92106 - ICE with structured bindings and -Wreturn-local-addr.
        * typeck.c (maybe_warn_about_returning_address_of_local): Avoid
        recursing on null initializer and return false instead.

2019-10-17  JeanHeyd Meneide  <phdofthehouse@gmail.com>

        Implement p1301 [[nodiscard("should have a reason")]] + p1771 DR
        * tree.c (handle_nodiscard_attribute): Handle C++2a nodiscard
        string message.
        (std_attribute_table) Increase nodiscard argument handling
        max_length from 0 to 1.
        * parser.c (cp_parser_check_std_attribute): Add requirement
        that nodiscard only be seen once in attribute-list.
        (cp_parser_std_attribute): Check that empty parenthesis lists are
        not specified for attributes that have max_length > 0 (e.g.
        [[attr()]]).
        * cvt.c (maybe_warn_nodiscard): Add nodiscard message to
        output, if applicable.
        (convert_to_void): Allow constructors to be nodiscard-able (P1771).

2019-10-18  Nathan Sidwell  <nathan@acm.org>

        * cp-tree.h (struct lang_type): Remove was_anonymous.
        (TYPE_WAS_UNNAMED): Implement by checking TYPE_DECL &
        TYPE_STUB_DECL.
        * decl.c (name_unnamed_type): Don't set TYPE_WAS_UNNAMED.

2019-10-17  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokfndecl): Remove redundant use of in_system_header_at.
        (compute_array_index_type_loc): Likewise.
        (grokdeclarator): Likewise.
        * error.c (cp_printer): Likewise.
        * lambda.c (add_default_capture): Likewise.
        * parser.c (cp_parser_primary_expression): Likewise.
        (cp_parser_selection_statement): Likewise.
        (cp_parser_toplevel_declaration): Likewise.
        (cp_parser_enumerator_list): Likewise.
        (cp_parser_using_declaration): Likewise.
        (cp_parser_member_declaration): Likewise.
        (cp_parser_exception_specification_opt): Likewise.
        (cp_parser_std_attribute_spec): Likewise.
        * pt.c (do_decl_instantiation): Likewise.
        (do_type_instantiation): Likewise.
        * typeck.c (cp_build_unary_op): Likewise.

        * decl.c (check_tag_decl): Pass to in_system_header_at the same
        location used for the permerror.
        (grokdeclarator): Likewise.

        * decl.c (check_tag_decl): Use locations[ds_typedef] in error_at.

2019-10-17  Jason Merrill  <jason@redhat.com>

        * cp-gimplify.c (cp_gimplify_expr): Use get_initialized_tmp_var.
        (gimplify_to_rvalue): Remove default NULL argument.

2019-10-17  Nathan Sidwell  <nathan@acm.org>

        * decl.c (builtin_function_1): Merge into ...
        (cxx_builtin_function): ... here.  Nadger the decl before maybe
        copying it.  Set the context.
        (cxx_builtin_function_ext_scope): Push to top level, then call
        cxx_builtin_function.

2019-10-16  Luis Machado  <luis.machado@linaro.org>

        * cp-gimplify.c: Fix reference to non-existing tree-gimple.c file.

2019-10-16  Jakub Jelinek  <jakub@redhat.com>

        * decl.c (cxx_maybe_build_cleanup): When clearing location of cleanup,
        if cleanup is a nop, clear location of its operand too.

2019-10-15  Andrew Sutton  <asutton@lock3software.com>

        Finish moving constraint and logic functionality of out pt.c.
        Reimplement and re-enable subsumption caching.

        * config-lang.in (gtfiles): Add logic.cc.
        * constraint.cc (atomic_constraints_identical_p): Add assertions.
        (hash_atomic_constraint): Likewise.
        (constraints_equivalent_p): New.
        (inchash::add_constraint): New.
        (iterative_hash_constraint): New.
        (decl_constraints): Moved from pt.c.
        (get_constraints): Likewise.
        (set_constraints): Likewise.
        (remove_constraints): Likewise.
        * cp-tree.h (CONSTR_P): New.
        (init_constraint_processing): Remove.
        (constraints_equivalent_p, iterative_hash_constraint): Declare.
        * decl.c (cxx_init_decl_processing): Don't initialize constraints.
        * logic.cc (subsumption_entry): Moved from pt.c.
        (subsumption_hasher): Likewise.
        (subsumption_cache): Likewise.
        (lookup_subsumption): Likewise.
        (save_subsumption): Likewise.
        (subsumes_constraints_nonnull): Use subsumption cache.
        * pt.c: Move aforementioned declarations out of this file.
        (init_constraint_processing): Remove.

2019-10-15  Andrew Sutton  <asutton@lock3software.com>

        * parser.c (cp_parser_constructor_declarator_p): Pass an empty
        decl-specifier-seq to make sure we parse type constraints as part
        of a type-specifier.

2019-10-15  Nathan Sidwell  <nathan@acm.org>

        * class.c (build_clones): Break out of clone_function_decl.  Just
        build the clones.
        (clone_function_decl): Call build_clones, then maybe add them to
        the method vector.

        * class.c (build_clone): Refactor to clarify recursiveness.

2019-10-14  Jason Merrill  <jason@redhat.com>

        PR c++/91930 - ICE with constrained inherited default ctor.
        * name-lookup.c (do_class_using_decl): Set TYPE_HAS_USER_CONSTRUCTOR
        for inherited constructor.

2019-10-14  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (check_tag_decl): Use DECL_SOURCE_LOCATION.

2019-10-14  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92084
        * semantics.c (handle_omp_array_sections_1): Temporarily disable
        -fstrong-eval-order also for in_reduction and task_reduction clauses.

        * parser.c (cp_parser_omp_all_clauses): Change bool NESTED_P argument
        into int NESTED, if it is 2, diagnose missing commas in between
        clauses.
        (cp_parser_omp_context_selector): Pass 2 as last argument to
        cp_parser_omp_all_clauses.

2019-10-12  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (cp_parser_omp_context_selector): Improve error recovery.
        For simd properties, put them directly into TREE_VALUE.
        (cp_finish_omp_declare_variant): Add "omp declare variant base"
        attribute rather than "omp declare variant".

2019-10-11  Marek Polacek  <polacek@redhat.com>

        PR c++/92049 - extra error with -fchecking=2.
        * pt.c (build_non_dependent_expr): Call fold_non_dependent_expr
        with tf_none.

2019-10-11  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (cp_build_binary_op): Do not handle RROTATE_EXPR and
        LROTATE_EXPR.
        * constexpr.c (cxx_eval_constant_expression): Likewise.
        (potential_constant_expression_1): Likewise.
        * pt.c (tsubst_copy): Likewise.

2019-10-11  Jason Merrill  <jason@redhat.com>

        * decl2.c (mark_used): Don't clobber DECL_SOURCE_LOCATION on
        explicitly defaulted functions.
        * method.c (synthesize_method): Likewise.

2019-10-11  Jakub Jelinek  <jakub@redhat.com>

        PR c++/91987
        * decl2.c (grok_array_decl): For -fstrong-eval-order, when array ref
        operands have been swapped and at least one operand has side-effects,
        revert the swapping before calling build_array_ref.
        * typeck.c (cp_build_array_ref): For non-ARRAY_TYPE array ref with
        side-effects on the index operand, if -fstrong-eval-order use
        save_expr around the array operand.
        (cp_build_binary_op): For shifts with side-effects in the second
        operand, wrap first operand into SAVE_EXPR and evaluate it before
        the shift.
        * semantics.c (handle_omp_array_sections_1): Temporarily disable
        flag_strong_eval_order during OMP_CLAUSE_REDUCTION array section
        processing.
        * cp-gimplify.c (gimplify_to_rvalue): New function.
        (cp_gimplify_expr): Use it.

2019-10-10  Marek Polacek  <polacek@redhat.com>

        * typeck.c (comp_ptr_ttypes_real): Change the return type to bool.
        Use false instead of 0.

2019-10-10  Jakub Jelinek  <jakub@redhat.com>

        * parser.h (struct cp_omp_declare_simd_data): Add variant_p member.
        * parser.c (cp_ensure_no_omp_declare_simd): Handle both declare simd
        and declare variant.
        (cp_parser_oacc_all_clauses): Formatting fix.
        (cp_parser_omp_all_clauses): Add NESTED_P argument, if true, terminate
        processing on closing paren and don't skip to end of pragma line.
        (cp_parser_omp_declare_simd): Add VARIANT_P argument.  Handle also
        declare variant.
        (omp_construct_selectors, omp_device_selectors,
        omp_implementation_selectors, omp_user_selectors): New variables.
        (cp_parser_omp_context_selector,
        cp_parser_omp_context_selector_specification,
        cp_finish_omp_declare_variant): New functions.
        (cp_parser_late_parsing_omp_declare_simd): Handle also declare variant.
        (cp_parser_omp_declare): Handle declare variant.

2019-10-09  Jason Merrill  <jason@redhat.com>

        * cp-tree.h (template_info_decl_check): Check ENABLE_TREE_CHECKING.

2019-10-09  Marek Polacek  <polacek@redhat.com>

        PR c++/91364 - P0388R4: Permit conversions to arrays of unknown bound.
        PR c++/69531 - DR 1307: Differently bounded array parameters.
        PR c++/88128 - DR 330: Qual convs and pointers to arrays of pointers.
        * call.c (build_array_conv): Build ck_identity at the beginning
        of the conversion.
        (standard_conversion): Pass bounds_none to comp_ptr_ttypes_const.
        (maybe_warn_array_conv): New.
        (convert_like_real): Call it.  Add an error message about converting
        from arrays of unknown bounds.
        (conv_get_original_expr): New.
        (nelts_initialized_by_list_init): New.
        (conv_binds_to_array_of_unknown_bound): New.
        (compare_ics): Implement list-initialization ranking based on
        array sizes, as specified in DR 1307 and P0388R.
        * cp-tree.h (comp_ptr_ttypes_const): Adjust declaration.
        (compare_bounds_t): New enum.
        * typeck.c (comp_array_types): New bool and compare_bounds_t
        parameters.  Use them.
        (structural_comptypes): Adjust the call to comp_array_types.
        (similar_type_p): Handle ARRAY_TYPE.
        (build_const_cast_1): Pass bounds_none to comp_ptr_ttypes_const.
        (comp_ptr_ttypes_real): Don't check cv-quals of ARRAY_TYPEs.  Use
        comp_array_types to compare array types.  Look through arrays as per
        DR 330.
        (comp_ptr_ttypes_const): Use comp_array_types to compare array types.
        Look through arrays as per DR 330.

2019-10-09  Marek Polacek  <polacek@redhat.com>

        PR c++/92032 - DR 1601: Promotion of enum with fixed underlying type.
        * call.c (standard_conversion): When converting an enumeration with
        a fixed underlying type to the underlying type, give it the cr_promotion
        rank.
        (compare_ics): Implement a tiebreaker as per CWG 1601.

2019-10-08  Andrew Sutton  <asutton@lock3software.com>
            Jason Merrill  <jason@redhat.com>

        Update the concepts implementation to conform to the C++20
        specification, improve compile times, and generally clean up
        the implementation.
        * call.c (build_new_function_call): Don't evaluate concepts here.
        (constraint_failure): Don't record the template.
        (print_z_candidate): Don't extract the template.
        * class.c (add_method): When overloading, hide ineligible special
        member fns.
        (check_methods): Set TYPE_HAS_COMPLEX_* here.
        * constexpr.c (cxx_eval_constant_expression): Evaluate concepts.
        (maybe_initialize_fundef_copies_table): Remove.
        (get_fundef_copy): Use hash_map_safe_get_or_insert.
        (clear_cv_and_fold_caches): Clear the satisfaction cache.
        * constraint.cc (known_non_bool_p): New.
        (parsing_constraint_expression_sentinel): Renamed from
        expanding_constraint_sentinel.
        (check_constraint_operands): New.
        (check_constraint_atom): New.
        (finish_constraint_binary_op): New.
        (finish_constraint_or_expr): Likewise.
        (finish_constraint_and_expr): Likewise.
        (finish_constraint_primary_expr): Likewise.
        (combine_constraint_expressions): New.
        (finish_requires_expr): Add location parm.
        (get_concept_definition): Return the initializer of concept definitions.
        (get_template_head_requirements): New.
        (get_trailing_function_requirements): New.
        (deduce_constrained_parameter): Check if the identifier or template-id
        is a concept definition.
        (resolve_concept_definition_check): Removed.
        (resolve_variable_concept_check): Removed.
        (resolve_concept_check): New.
        (resolve_constraint_check): Handle concept definitions.
        converting arguments.
        (function_concept_check_p): Removed.
        (variable_concept_check_p): Removed.
        (unpack_concept_check): New.
        (get_concept_check_template): New.
        (build_call_check): Moved and renamed to build_function_check.
        (build_concept_check_arguments): make static.
        (build_function_check): Always do overload resolution
        in order to force conversion of template arguments (i.e., actually
        check that the use of a concept is valid).
        (build_standard_check): Renamed from build_real_concept_check.
        (build_real_concept_check): Build checks for C++2a concepts by
        (build_wildcard_concept_check): New.
        (build_concept_check): Use build_real_concept_check. New overload.
        (build_constraints): Save expressions, not normalized constraints.
        (build_concept_id): New. Pass tf_warning_or_error.
        (build_type_constraint): New.
        (finish_type_constraints): New.
        (associate_classtype_constraints): Also add constraints to union
        types. Note the original declaration in errors. Don't return
        error_mark_node in order to avoid an assertion later.
        (push_down_pack_expansion): Remove.
        (finish_shorthand_constraint): Make fold expressions, not naked
        parameter packs. Always apply the constraint to each template argument.
        (check_introduction_list): New. Fail if not enough
        names are introduced.
        (finish_template_introduction): Don't normalize constraints. Pass
        tsubst flags. Check for insufficient introductions.
        (placeholder_extract_concept_and_args): Handle the template-id case.
        Unpack function concept checks correctly.
        (tsubst_simple_requirement): Return errors if they occur. Don't
        process as a template.
        (tsubst_type_requirement): Likewise.
        (type_deducible_p): New. Wrap the input expression in parens for the
        purpose of deduction.
        (expression_convertible_t): New.
        (tsubst_compound_requirement): Use new deduction, conversion predicates.
        (tsubst_nested_requirement): Return errors if they occur. Don't
        process as a template. Instantiate and evaluate the nested requirement.
        (tsubst_valid_expression_requirement): New.
        (tsubst_simple_requirement): Use tsubst_valid_expression_requirement.
        (tsubst_compound_requirement): Use tsubst_valid_expression_requirement.
        (check_constaint_variables): New.
        (tsubst_constraint_variables): Check that type substitutions are valid.
        (tsubst_requires_expr): Likewise. Produce new requires-exprs during
        template substitution. Copy the previous local specialization stack,
        so references to non-local parameters can be found. Use cp_unevaluated.
        (tsubst_constraint): New. Don't evaluate concept checks.
        (subst_info): New.
        (norm_info): New. Used to build a normalization tree for concept check
        diagnostics.
        (debug_parameter_mapping): New.
        (debug_argument_list): New.
        (expand_concept): Removed.
        (normalize_logical_operation): Pass subst_info through call.
        (normalize_pack_expansion): Remove.
        (normalize_simple_requirement): Removed
        (normalize_type_requirement): Removed
        (normalize_compound_requirement): Removed
        (normalize_nested_requirement): Removed
        (normalize_requirement): Removed
        (normalize_requirements): Removed
        (normalize_requires_expression): Removed
        (normalize_variable_concept_check): Removed.
        (normalize_function_concept_check): Removed.
        (normalize_concept_check): Merged all normalize_*_check here.
        Substitute through written template arguments before normalizing the
        definition. Only substitute the innermost template arguments.
        (check_for_logical_overloads): Delete.
        (map_arguments): New. Associate template parameters with arguments.
        (build_parameter_mapping): New. Extract used parameters.
        (normalize_expression): Rewrite.
        (normalize_conjunction): Removed
        (normalize_disjunction): Removed
        (normalize_predicate_constraint): Removed
        (normalize_parameterized_constraint): Removed
        (normalized_map): New variable.
        (get_normalized_constraints): New entry point for normalization.
        Establishes a timer.
        (get_normalized_constraints_from_info): New.
        (get_normalized_constraints_from_decl): New. Turn on template processing
        prior to normalization. Handle inheriting ctors. Build the
        normalization arguments from the full set of template parameters of the
        most general template. This guarantees that we have no concrete arguments
        in the parameter mapping (e.g., from template members of class
        templates). Cache normalizations.
        (normalize_concept_definition): New. Cache normalizations.
        (normalize_template_requirements): New.
        (normalize_nontemplate_requirements): New.
        (normalize_constraint_expression): New.
        (tsubst_parameter_mapping): New.
        (get_mapped_args): New.
        (parameter_mapping_equivalent_p): New. Use template_args_equal.
        (atomic_constraints_identical_p): New.
        (hash_atomic_constraint): New.
        (satisfying_constraint_p): New. Guard against recursive evaluation of
        constraints during satisfaction.
        (satisfy_conjunction): New.
        (satisfy_disjunction): New.
        (sat_entry): New class for hashing satisfaction results.
        (sat_hasher): New hash traits.
        (sat_cache): New.
        (get_satisfaction): New. Returns cached satisfaction result.
        (save_satisfaction): New. Caches a satisfaction result.
        (clear_satisfaction_cache): New.
        (satisfaction_cache): New. Helps manage satisfaction cache requests.
        (decl_satisfied_cache): New.
        (satisfy_atom): New.
        (satisfy_constraint_r): New.
        (satisfy_constraint): Use new satisfaction algorithm.
        (evaluate_concept_check): New.
        (evaluate_concept): Removed.
        (evaluate_function_concept): Removed.
        (evaluate_variable_concept): Removed.
        (satisfy_constraint_expression): New.
        (constraint_expression_satisfied_p): New.
        (constraints_satisfied_p): Use strip_inheriting_ctors. Use
        push_/pop_access_scope.
        (more_constrained): Normalize before calling out to subsumption. Allow
        classes as arguments.
        (strictly_subsumes): Allow non-templates as arguments. Accept a new
        template argument.
        (weakly_subsumes): New.
        (at_least_as_constrained): Removed.
        (diagnose_other_expression): Removed.
        (diagnose_predicate_constraint): Removed.
        (diagnose_pack_expansion): Removed.
        (diagnose_check_constraint): Removed.
        (diagnose_logical_constraint): Removed.
        (diagnose_expression_constraint): Removed.
        (diagnose_type_constraint): Removed.
        (diagnose_implicit_conversion_constraint): Removed.
        (diagnose_argument_deduction_constraint): Removed.
        (diagnose_exception_constraint): Removed.
        (diagnose_parameterized_constraint): Removed.
        (diagnose_argument_deduction_constraint): Removed.
        (diagnose_argument_deduction_constraint): Removed.
        (diagnose_argument_deduction_constraint): Removed.
        (diagnose_trait_expr): New.
        (diagnose_requires_expr): New.
        (diagnose_atomic_constraint): New.
        (diagnose_valid_expression) Stop wrongly diagnosing valid expressions.
        Don't substitute as if in template decls. This causes substitution
        to generate expressions that aren't suitable for use with the noexcept
        routines.
        (diagnose_valid_type) Likewise.
        (diagnose_compound_requirement) Actually emit diagnostics for
        the causes of errors.Call force_paren_expr_uneval.
        (diagnose_declaration_constraints): Turn on template processing to
        suppress certain analyses.
        * cp-objcp-common.c (cp_common_init_ts): Make concepts typed.
        (cp_get_debug_type): Use hash_map_safe_*.
        * cp-tree.h: New function declarations for semantic actions, other
        facilities. Remove declaration no longer used or needed. Remove
        unused _CONSTR macros.
        (LANG_DECL_HAS_MIN): Add CONCEPT_DECL.
        (template_info_decl_check): Factor macro check into an inline function.
        (DECL_TEMPLATE_INFO): Use new check facility.
        (finish_concept_definition): New. Don't invalid concept declarations
        with invalid initializers.
        (find_template_parameters): New.
        (concept_definition_p): New.
        (concept_check_p): New.
        (variable_concept_check_p): New.
        (force_paren_expr_uneval): New.
        (ovl_iterator::using_p): A USING_DECL by itself was also
        introduced by a using-declaration.
        (struct tree_template_info): Use tree_base instead of
        tree_common. Add tmpl and args fields.
        (TI_TEMPLATE, TI_ARGS): Adjust.
        (DECLTYPE_FOR_INIT_CAPTURE): Remove.
        (CONSTR_CHECK, CONSTR_INFO, CONSTR_EXPR, CONSTR_CONTEXT): New.
        (ATOMIC_CONSTR_MAP, TRAIT_EXPR_LOCATION): New.
        (struct tree_trait_expr): Add locus field.
        (enum tsubst_flags): Add tf_norm as a hint to generate normalization
        context when diagnosing constraint failure.
        * cp-tree.def: Remove unused _CONSTR nodes and rename PRED_CONSTR
        to ATOMIC_CONSTR.
        (CONCEPT_DECL): New.
        * cxx-pretty-print.c: Remove constraint printing code.
        (pp_cxx_concept_definition): New.
        (pp_cxx_template_declaration): Print concept definitions.
        (pp_cxx_check_constraint): Update printing for concept definitions.
        (pp_cxx_nested_name_specifier): Fix a weird
        case where we're printing '::::' for concepts.
        (simple_type_specifier): Print requirements for placeholder types.
        (pp_cxx_constrained_type_spec): Print the associated requirements of
        a placeholder type.
        (pp_cxx_compound_requirement): Add space before the '->'.
        (pp_cxx_parameter_mapping): Print the parameter mapping.
        (pp_cxx_atomic_constraint): Use the function above.
        * decl.c (redeclaration_error_message): New error for concepts.
        (grokdeclarator): Check for and disallow decltype(auto) in parameter
        declarations.
        (grokfndecl): Don't normalize constraints. Add check for constraints
        on declaration.
        (grokvardecl): Don't normalize constraints.
        (grok_special_member_properties): Don't set TYPE_HAS_COMPLEX_*.
        (function_requirements_equivalent_p): New. Compare trailing
        requires clauses. Compare combined constraints in pre-C++20 mode.
        (decls_match): Compare trailing requires clauses. Compare template
        heads for function templates. Remove old constraint comparison.
        Simplify comparison of functions, function templates.
        (duplicate_function_template_decls): New. Refactor a nasty if
        condition into a single predicate.
        (require_deduced_type): Don't complain if we already complained about
        deduction failure.
        (finish_function): Perform auto deduction to ensure that constraints
        are checked even when functions contain no return statements. Only do
        auto deduction if we haven't previously seen any return statements.
        This prevents multiple diagnostics of the same error.
        (store_decomp_type): Remove.
        (cp_finish_decomp): Use hash_map_safe_put.
        * error.c: Remove constraint printing code.
        (dump_decl): Dump concept definitions. Handle wildcard declarations.
        (dump_template_decl): Likewise.
        (dump_type): Print associated requirements for placeholder
        types.
        (rebuild_concept_check): New.
        (maybe_print_single_constraint_context): New.
        (maybe_print_constraint_context): Recursively print nested contexts.
        * init.c (get_nsdmi): Use hash_map_safe_*.
        * lambda.c (maybe_add_lambda_conv_op): Bail if deduction failed.
        (add_capture): Copy parameter packs from init.
        (lambda_capture_field_type): Always use auto for init-capture.
        * logic.cc: Completely rewrite.
        (constraint_hash): New.
        (clause/ctor): Save atoms in the hash table.
        (replace): Save atoms during replacement.
        (insert): Save atoms during insertion.
        (contains): Only search the hash table for containment.
        (clause): Keep a hash of atomic constraints.
        (clause::clause): Explicitly copy the hash table when copying.
        (disjunction_p, conjunction_p, atomic_p, dnf_size, cnf_size): New.
        (diagnose_constraint_size): New.
        (subsumes_constraints_nonnull): Compare the sizes of normalized formula
        to determine the cheapest decomposition.
        * name-lookup.c (diagnose_name_conflict): Diagnose name issues with
        concepts.
        (matching_fn_p): Check constraints.
        (push_class_level_binding_1): Move overloaded functions case down,
        accept FUNCTION_DECL as target_decl.
        * parser.c (enum required_token): New required token for auto.
        (make_location): Add overload taking lexer as last parm.
        (cp_parser_required_error): Diagnose missing auto.
        (cp_parser_diagnose_ungrouped_constraint_plain): New.
        (cp_parser_diagnose_ungrouped_constraint_plain): New.
        (cp_parser_constraint_primary_expression): New. Tentatively parse the
        primary expression. If that fails tentatively parse a lower
        precedence expression in order to diagnose the error.
        (cp_parser_check_non_logical_constraint): New. Performs a trial
        parse of the right-hand-side of non-logical operators in order to
        generate good diagnostics.
        (cp_parser_constraint_logical_and_expression): New.
        (cp_parser_constraint_logical_or_expression): New.
        (cp_parser_requires_clause_expression): New.
        (cp_parser_requires_clause): Renamed to cp_parser_constraint_expression.
        (cp_parser_requires_clause_opt): Parse the requires-clause differently
        in -fconcepts and -std=c++2a modes.
        (cp_parser_requirement_list): Rename to cp_parser_requirement_seq.
        Rewrite so that semicolons are parsed
        along with requirements, not the sequence.
        (cp_parser_simple_requirement): Expect a semicolon at end.
        (cp_parser_compound_requirement): Expect a semicolon at end. Only
        allow trailing-return-type with -fconcepts-ts.
        (cp_parser_nested_requirement): Expect a semicolon at end. Parse
        constraint-expressions.
        (cp_parser_concept_definition): New. Don't fail parsing the concept
        definition if the initializer is ill-formed. Don't declare the concept
        before parsing the initializer.
        (cp_parser_constraint_expression): Declare earlier.
        (cp_parser_type_requirement): Current scope is not valid.
        (cp_parser_requires_expression): Commit to the tentative parse.
        (cp_parser_decl_specifier_seq): Warn when concept appears to be used
        as a decl-specifier.
        (cp_parser_template_declaration_after_parameters): Parse concept
        definitions.
        (cp_parser_template_id): Don't try to resolve a concept template-id yet.
        (cp_parser_template_id_expr): Resolve it as a concept check.
        (cp_parser_decl_specifier_seq): Warn on 'concept bool'.
        (cp_parser_type_parameter): Combine expressions not
        constraints.
        (cp_parser_explicit_template_declaration): Combine expressions not
        constraints.
        (cp_parser_maybe_concept_name): Removed.
        (cp_parser_simple_type_specifier): Handle an error condition of
        a bad constrained type specifier. Expect auto or decltype after
        a concept name. Also handle the case where we have a template-id
        as a concept check.
        (cp_parser_template_introduction): Diagnose errors on invalid
        introductions. Give up if it doesn't start with a concept name.
        Pedwarn if not -fconcepts-ts.
        (synthesize_implicit_template_parm): Don't do consistent binding.
        Use a new flag for constrained parameters. Combine expressions,
        not constraints. Fail if we get a placeholder in block scope.
        Placeholders that do not constrain types are not allowed in parameter
        declarations, so don't handle them.
        (cp_parser_placeholder_type_specifier): New. Implement parsing of
        placeholder type specifiers following a concept name or partial
        concept check. Disallow decltype(auto) parameters.
        (cp_parser_nested_name_specifier_opt): If the token is already
        CPP_NESTED_NAME_SPECIFIER, leave it alone.
        (cp_parser_id_expression, cp_parser_unqualified_id): Call
        cp_parser_template_id_expr.
        (cp_parser_placeholder_type_specifier): Add tentative parm.  Don't
        expect a WILDCARD_DECL.
        (cp_parser_trait_expr): Pass trait_loc down.
        (cp_parser_postfix_expression): Do set location of dependent member
        call.
        * pt.c (finish_concept_definition): New.
        (push_template_decl_real): Handle concept definitions.
        (start_concept_definition): Let push_template_decl_real handle the
        creation of the template.
        (get_constraints): Return null if the table hasn't been initialized.
        (tsubst_copy_and_build): Build template-id expressions for concept
        checks.
        [TRAIT_EXPR]: Pass trait_loc down.
        (lookup_template_class_1): Add the template name to the constraint
        failure diagnostic.
        (lookup_and_finish_template_variable): Build concept checks
        with the correct arguments.
        (tsubst_function_decl): Don't substitute through constraints.
        Always associate constraints with functions.
        (template_parm_level_and_index): Make non-static.
        (for_each_template_parm_r): Handle requires expressions.
        (keep_template_parm): New.
        (find_template_parameters): New.
        (more_specialized_fn): Change how winners and losers are chosen.
        (make_constrained_auto): Don't normalize constraints.
        (template_parameters_equivalent_p): New. Compare template
        parameters. Add a comparison for implicitly vs. explicitly declared
        parameters.
        (template_parameter_lists_equivalent_p): New. Compare template
        parameter lists.
        (template_requirements_equivalent_p): New.
        (template_heads_equivalent_p): New. Compare template heads.
        (template_parameter_constraints_equivalent_p): New.
        (is_compatible_template_arg): Use weakly_subsumes.
        (maybe_new_partial_specialization): Use new constraint comparison
        for finding specializations.
        (process_partial_specialization): Pass main template as argument.
        (more_specialized_partial_spec): Don't immediately return when
        detecting a winner.
        (make_constrained_auto): Handle concept definitions.
        (do_auto_deduction): Update auto deduction for new concept model.
        Extract the function concept correctly; rename constr to check to
        reflect the kind of node.
        (tsubst): Adjust wildcard argument during substitution.
        [DECLTYPE_TYPE]: Remove init-capture handling.
        (tsubst_copy_and_build): Build concept checks, not template ids.
        Defer checks of function concepts. Handle concepts before variable
        templates. Handle calls to function concepts explicitly.
        (coerce_template_parms): Use concept_definition_p. Handle a deduction
        error where a potentially empty pack can be supplied after the last
        parameter of a concept.
        (finish_template_variable): Don't process concepts here.
        (instantiation_dependent_r): Use concept_check_p.
        (tsubst_template_args): Make non-static.
        (make_constrained_placeholder_type): New. Refactored from
        make_constrained_auto.
        (make_constrained_auto) Use make_constrained_placeholder_type.
        (make_constrained_decltype_auto) New.
        (tsubst_function_parms): New.
        (value_dependent_expression_p) [TEMPLATE_ID_EXPR]: Use
        concept_definition_p.
        (push_access_scope, pop_access_scope): No longer static.
        (tsubst_template_parm): Substitute TEMPLATE_PARM_CONSTRAINTS.
        (tsubst_friend_function): Use tsubst_constraint. Use generic_targs_for.
        (get_underlying_template) Use generic_targs_for.
        (uses_parameter_packs): Return tree.
        (gen_elem_of_pack_expansion_instantiation): Don't push
        local_specialization_stack.
        (prepend_one_capture): New.
        (tsubst_lambda_expr): Use prepend_one_capture.  Don't touch
        local_specializations.
        (template_parms_level_to_args): No longer static.
        (add_outermost_template_args): Likewise.
        (find_template_parameter_info): New. Provide context for finding
        template parameters.
        (keep_template_parm): Don't keep parameters declared at depth levels
        greater than those of the template parameters of the source declaration.
        Don't propagate cv-qualified types. Return 0, so we find all template
        parameters, not the just first.
        (any_template_parm_r): New. Handle cases that are mishandled by
        for_each_template_parm_r.
        (generic_targs_for): Factor out of coerce_template_args_for_ttp.
        (tsubst_argument_pack): Factor out of tsubst_template_args.
        (constraint_sat_entry): Removed.
        (constraint_sat_hasher): Removed.
        (concept_spec_entry): Removed.
        (concept_spec_hasher): Removed.
        (constraint_memos): Removed.
        (concept_memos): Removed.
        (lookup_constraint_satisfaction): Removed.
        (memoize_constraint_satisfaction): Removed.
        (lookup_concept_satisfaction): Removed.
        (memoize_concept_satisfaction): Removed.
        (concept_expansions): Removed.
        (get_concept_expansion): Removed.
        (save_concept_expansion): Removed.
        (init_constraint_processing): Remove initialization of non-existing
        resources.
        (find_template_requirement): New. Search for the sub-requirement
        within the associated constraints.
        (convert_generic_types_to_packs): Also transform the associated
        constraint and update the current template requirements.
        (store_defaulted_ttp, lookup_defaulted_ttp): Remove.
        (add_defaults_to_ttp): Use hash_map_safe_*.
        * semantics.c (finish_call_expr): Diagnose calls to concepts.
        Handle concept checks explicitly.
        (finish_id_expression): Evaluate variable concepts as part of
        id-expression processing. Don't treat variable concepts as variables,
        and don't process function concepts as plain id-expressions.
        (force_paren_expr): Add even_uneval parm.
        (finish_trait_expr): Add location parm.
        * tree.c (special_memfn_p): New.
        (cp_expr_location): Handle TRAIT_EXPR.
        * typeck.c (check_return_expr): Actually use the diagnostic kind
        when performing return-type deduction.
        * typeck2.c (build_functional_cast): Don't rely on the location of
        'auto'.

2019-10-09  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grok_ctor_properties): Use DECL_SOURCE_LOCATION.
        * typeck.c (cp_build_binary_op): Use the op_location_t argument
        in many error messages.

2019-10-08  Martin Sebor  <msebor@redhat.com>

        PR c++/92001
        * call.c (maybe_warn_class_memaccess): Handle arrays.

2019-10-07  Paolo Carlini  <paolo.carlini@oracle.com>

        * call.c (resolve_args): Use cp_expr_loc_or_input_loc in one place.
        * decl.c (grokdeclarator): Use id_loc in one place.
        * decl2.c (build_anon_union_vars): Use DECL_SOURCE_LOCATION.
        * parser.c (cp_parser_delete_expression): Fix the location of the
        returned expression.
        (cp_parser_throw_expression): Likewise.
        * pt.c (determine_specialization): Use DECL_SOURCE_LOCATION.

2019-10-05  Jakub Jelinek  <jakub@redhat.com>

        PR c++/91369 - Implement P0784R7: constexpr new
        * cp-tree.h (enum cp_tree_index): Add CPTI_HEAP_UNINIT_IDENTIFIER,
        CPTI_HEAP_IDENTIFIER and CPTI_HEAP_DELETED_IDENTIFIER.
        (heap_uninit_identifier, heap_identifier, heap_deleted_identifier):
        Define.
        (type_has_constexpr_destructor, build_new_constexpr_heap_type,
        cxx_constant_dtor): Declare.
        * class.c (type_maybe_constexpr_default_constructor): Make static.
        (type_maybe_constexpr_destructor, type_has_constexpr_destructor): New
        functions.
        (finalize_literal_type_property): For c++2a, don't clear
        CLASSTYPE_LITERAL_P for types without trivial destructors unless they
        have non-constexpr destructors.
        (explain_non_literal_class): For c++2a, complain about non-constexpr
        destructors rather than about non-trivial destructors.
        * constexpr.c: Include stor-layout.h.
        (struct constexpr_global_ctx): New type.
        (struct constexpr_ctx): Add global field, remove values and
        constexpr_ops_count.
        (cxx_replaceable_global_alloc_fn): New inline function.
        (cxx_eval_call_expression): For c++2a allow calls to replaceable
        global allocation functions, for new return address of a heap uninit
        var, for delete record its deletion.  Change ctx->values->{get,put} to
        ctx->global->values.{get,put}.
        (non_const_var_error): Add auto_diagnostic_group sentinel.  Emit
        special diagnostics for heap variables.
        (cxx_eval_store_expression): Change ctx->values->{get,put} to
        ctx->global->values.{get,put}.
        (cxx_eval_loop_expr): Initialize jump_target if NULL.  Change
        new_ctx.values->remove to ctx->global->values.remove.
        (cxx_eval_constant_expression): Change *ctx->constexpr_ops_count
        to ctx->global->constexpr_ops_count.  Change ctx->values->{get,put} to
        ctx->global->values.{get,put}.
        <case NOP_EXPR>: Formatting fix.  On cast of replaceable global
        allocation function to some pointer type, adjust the type of
        the heap variable and change name from heap_uninit_identifier
        to heap_identifier.
        (find_heap_var_refs): New function.
        (cxx_eval_outermost_constant_expr): Add constexpr_dtor argument,
        handle evaluation of constexpr dtors and add tracking of heap
        variables.  Use tf_no_cleanup for get_target_expr_with_sfinae.
        (cxx_constant_value): Adjust cxx_eval_outermost_constant_expr caller.
        (cxx_constant_dtor): New function.
        (maybe_constant_value, fold_non_dependent_expr_template,
        maybe_constant_init_1): Adjust cxx_eval_outermost_constant_expr
        callers.
        (potential_constant_expression_1): Ignore clobbers.  Allow
        COND_EXPR_IS_VEC_DELETE for c++2a.
        * decl.c (initialize_predefined_identifiers): Add heap identifiers.
        (decl_maybe_constant_destruction): New function.
        (cp_finish_decl): Don't clear TREE_READONLY for constexpr variables
        with non-trivial, but constexpr destructors.
        (register_dtor_fn): For constexpr variables with constexpr non-trivial
        destructors call cxx_maybe_build_cleanup instead of adding destructor
        calls at runtime.
        (expand_static_init): For constexpr variables with constexpr
        non-trivial destructors call cxx_maybe_build_cleanup.
        (grokdeclarator): Allow constexpr destructors for c++2a.  Formatting
        fix.
        (cxx_maybe_build_cleanup): For constexpr variables with constexpr
        non-trivial destructors call cxx_constant_dtor instead of adding
        destructor calls at runtime.
        * init.c: Include stor-layout.h.
        (build_new_constexpr_heap_type, maybe_wrap_new_for_constexpr): New
        functions.
        (build_new_1): For c++2a and new[], add cast around the alloc call
        to help constexpr evaluation figure out the type of the heap storage.
        (build_vec_delete_1): Set DECL_INITIAL of tbase and emit a DECL_EXPR
        for it instead of initializing an uninitialized variable.
        * method.c: Include intl.h.
        (SFK_CTOR_P, SFK_DTOR_P, SFK_ASSIGN_P, SFK_COPY_P, SFK_MOVE_P): Move
        definitions earlier.
        (process_subob_fn): Add sfk argument, adjust non-constexpr call
        diagnostics based on it.
        (walk_field_subobs): Formatting fixes.  Adjust process_subob_fn caller.
        (synthesized_method_base_walk): Likewise.
        (synthesized_method_walk): Set *constexpr_p to true for dtors in c++2a.
        Fix up DR number in comment.
        (implicitly_declare_fn): Formatting fix.
        * typeck2.c (store_init_value): Don't call cp_fully_fold_init on
        initializers of automatic non-constexpr variables in constexpr
        functions.

2019-10-04  Jakub Jelinek  <jakub@redhat.com>

        PR c++/71504
        * constexpr.c (cxx_fold_indirect_ref_1): New function.
        (cxx_fold_indirect_ref): Use it.

        PR c++/91974
        * cp-gimplify.c (cp_gimplify_expr) <case CALL_EXPR>: For
        -fstrong-eval-order ensure CALL_EXPR_FN side-effects are evaluated
        before any arguments.  Additionally, ensure CALL_EXPR_FN that isn't
        invariant nor OBJ_TYPE_REF nor SSA_NAME is forced into a temporary.

2019-10-03  Paolo Carlini  <paolo.carlini@oracle.com>

        * init.c (build_new): Use cp_expr_loc_or_input_loc in two places.
        * name-lookup.c (do_pushdecl): Use DECL_SOURCE_LOCATION.
        (push_class_level_binding_1): Likewise.
        (set_decl_namespace): Likewise.

2019-10-03  Jakub Jelinek  <jakub@redhat.com>

        * constexpr.c (cxx_eval_constant_expression) <case CLEANUP_STMT>: If
        not skipping upon entry to body, run cleanup with the same *jump_target
        as it started to run the cleanup even if the body returns, breaks or
        continues.
        (potential_constant_expression_1): Allow CLEANUP_STMT.

        * constexpr.c (cxx_eval_store_expression): Formatting fix.  Handle
        const_object_being_modified with array type.

2019-10-02  Jason Merrill  <jason@redhat.com>

        * typeck2.c (store_init_value): Only clear_cv_and_fold_caches if the
        value is constant.

2019-09-30  Jason Merrill  <jason@redhat.com>

        Use hash_map_safe_* functions.
        * constexpr.c (maybe_initialize_fundef_copies_table): Remove.
        (get_fundef_copy): Use hash_map_safe_get_or_insert.
        * cp-objcp-common.c (cp_get_debug_type): Use hash_map_safe_*.
        * decl.c (store_decomp_type): Remove.
        (cp_finish_decomp): Use hash_map_safe_put.
        * init.c (get_nsdmi): Use hash_map_safe_*.
        * pt.c (store_defaulted_ttp, lookup_defaulted_ttp): Remove.
        (add_defaults_to_ttp): Use hash_map_safe_*.

2019-10-02  Richard Biener  <rguenther@suse.de>

        PR c++/91606
        * decl.c (build_ptrmemfunc_type): Mark pointer-to-member
        fat pointer structure members as DECL_NONADDRESSABLE_P.

2019-09-28  Marek Polacek  <polacek@redhat.com>

        PR c++/91889 - follow-up fix for DR 2352.
        * call.c (involves_qualification_conversion_p): New function.
        (direct_reference_binding): Build a ck_qual if the conversion
        would involve a qualification conversion.
        (convert_like_real): Strip the conversion created by the ck_qual
        in direct_reference_binding.

        PR c++/91921 - stray warning with -Woverloaded-virtual.
        * class.c (warn_hidden): Only emit the second part of
        -Woverloaded-virtual if the first part was issued.  Use inform instead
        warning_at.

        PR c++/91923 - failure-to-SFINAE with class type NTTP in C++17.
        * pt.c (invalid_nontype_parm_type_p): Only emit errors when
        tf_error.

2019-09-27  Jakub Jelinek  <jakub@redhat.com>

        PR c++/88203
        * parser.c (cp_parser_omp_var_list_no_open): Parse predefined
        variables.
        * semantics.c (finish_omp_clauses): Allow predefined variables in
        shared and firstprivate clauses, even when they are predetermined
        shared.
        * cp-gimplify.c (cxx_omp_predetermined_sharing_1): Return
        OMP_CLAUSE_DEFAULT_SHARED for predefined variables.

2019-09-27  Jason Merrill  <jason@redhat.com>

        * constexpr.c (cxx_fold_indirect_ref): Use similar_type_p.
        (cxx_eval_indirect_ref): Likewise.  Improve error location.

        * cp-tree.h (class iloc_sentinel): New.
        * decl.c (grokdeclarator, finish_enum_value_list): Use it.
        * mangle.c (mangle_decl_string): Use it.
        * pt.c (perform_typedefs_access_check): Use it.

2019-09-27  Richard Sandiford  <richard.sandiford@arm.com>

        * cp-tree.h (build_cxx_call): Take the original function decl
        as an optional final parameter.
        (cp_build_function_call_vec): Likewise.
        * call.c (build_cxx_call): Likewise.  Pass all built-in calls to
        check_builtin_function_arguments.
        * typeck.c (build_function_call_vec): Take the original function
        decl as an optional final parameter and pass it to
        cp_build_function_call_vec.
        (cp_build_function_call_vec): Take the original function
        decl as an optional final parameter and pass it to build_cxx_call.

2019-09-25  Marek Polacek  <polacek@redhat.com>

        PR c++/91877 - ICE with converting member of packed struct.
        * call.c (convert_like_real): Use similar_type_p in an assert.

2019-09-25  Paolo Carlini  <paolo.carlini@oracle.com>

        * name-lookup.c (check_extern_c_conflict): Use DECL_SOURCE_LOCATION.
        (check_local_shadow): Use it in three additional places.

2019-09-24  Jason Merrill  <jason@redhat.com>

        * parser.c (cp_parser_postfix_expression): Do set location of
        dependent member call.

2019-09-24  Marek Polacek  <polacek@redhat.com>

        PR c++/91868 - improve -Wshadow location.
        * name-lookup.c (check_local_shadow): Use DECL_SOURCE_LOCATION
        instead of input_location.

        PR c++/91845 - ICE with invalid pointer-to-member.
        * expr.c (mark_use): Use error_operand_p.
        * typeck2.c (build_m_component_ref): Check error_operand_p after
        calling mark_[lr]value_use.

2019-09-23  Paolo Carlini  <paolo.carlini@oracle.com>

        * pt.c (check_explicit_specialization): Use cp_expr_loc_or_input_loc.
        (process_partial_specialization): Likewise.
        (convert_nontype_argument_function): Likewise.
        (invalid_tparm_referent_p): Likewise.
        (convert_template_argument): Likewise.
        (check_valid_ptrmem_cst_expr): Tidy.

2019-09-23  Jason Merrill  <jason@redhat.com>

        PR c++/91809 - bit-field and ellipsis.
        * call.c (convert_arg_to_ellipsis): Don't call decay_conversion for
        arithmetic arguments.

2019-09-23  Marek Polacek  <polacek@redhat.com>

        PR c++/91844 - Implement CWG 2352, Similar types and reference binding.
        * call.c (reference_related_p): Use similar_type_p instead of
        same_type_p.
        (reference_compatible_p): Update implementation to match CWG 2352.
        * cp-tree.h (similar_type_p): Declare.
        * typeck.c (similar_type_p): New.

2019-09-22  Marek Polacek  <polacek@redhat.com>

        PR c++/91819 - ICE with operator++ and enum.
        * call.c (build_new_op_1): Set arg2_type.

2019-09-17  Jason Merrill  <jason@redhat.com>

        * parser.c (cp_parser_statement): Handle [[likely]] on
        compound-statement.

2019-09-19  Jason Merrill  <jason@redhat.com>

        Revert:
        * call.c (build_new_op_1): Don't apply any standard conversions to
        the operands of a built-in operator.  Don't suppress conversions in
        cp_build_unary_op.
        * typeck.c (cp_build_unary_op): Do integral promotions for enums.

2019-09-16  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Use declspecs->locations and
        declarator->id_loc in a few error messages.
        * pt.c (finish_member_template_decl): Use DECL_SOURCE_LOCATION.
        (push_template_decl_real): Likewise.

2019-09-15  Jason Merrill  <jason@redhat.com>

        PR c++/30277 - int-width bit-field promotion.
        PR c++/33819 - long bit-field promotion.
        * typeck.c (cp_perform_integral_promotions): Handle large bit-fields
        properly.  Handle 32-bit non-int bit-fields properly.
        (is_bitfield_expr_with_lowered_type): Don't look through NOP_EXPR.

        PR c++/82165 - enum bitfields and operator overloading.
        * call.c (build_new_op_1): Use unlowered_expr_type.

        * call.c (build_new_op_1): Don't apply any standard conversions to
        the operands of a built-in operator.  Don't suppress conversions in
        cp_build_unary_op.
        * typeck.c (cp_build_unary_op): Do integral promotions for enums.

2019-09-15  Marek Polacek  <polacek@redhat.com>

        PR c++/91740 - ICE with constexpr call and ?: in ARRAY_REF.
        * pt.c (build_non_dependent_expr): Call build_non_dependent_expr for
        the first operand.

2019-09-15  Nathan Sidwell  <nathan@acm.org>

        * cp-tree.h (DECL_CLONED_FUNCTION_P): Reimplement using
        IDENTIFIER_CDTOR_P, correct documentation.
        (DECL_CLONED_FUNCTION): Directly access field.
        (decl_cloned_function_p): Delete.
        * class.c (decl_cloned_function_p): Delete.
        * pt.c (instantiate_template_1): Check DECL_CHAIN is a decl.

2019-09-11  Nathan Sidwell  <nathan@acm.org>

        * c-objcp-common.c (cp-objcp-common.c): Alphababetize and
        correctly mark all C++ nodes.
        * decl.c (cp_tree_node_structure): Alphabetize.

2019-09-10  Marek Polacek  <polacek@redhat.com>

        PR c++/91673 - ICE with noexcept in alias-declaration.
        * parser.c (CP_PARSER_FLAGS_DELAY_NOEXCEPT): New parser flag.
        (cp_parser_lambda_declarator_opt): Pass CP_PARSER_FLAGS_NONE to
        cp_parser_exception_specification_opt.
        (cp_parser_direct_declarator): Adjust a call to
        cp_parser_exception_specification_opt.
        (cp_parser_member_declaration): Pass CP_PARSER_FLAGS_DELAY_NOEXCEPT
        to cp_parser_declarator if not processing a friend or typedef
        declaration.
        (cp_parser_late_noexcept_specifier): Adjust a call to
        cp_parser_noexcept_specification_opt.
        (cp_parser_noexcept_specification_opt): New parameter for parser flags,
        drop the FRIEND_P parameter.  Use the new parameter.
        (cp_parser_exception_specification_opt): Likewise.
        (cp_parser_transaction): Adjust a call to
        cp_parser_noexcept_specification_opt.
        (cp_parser_transaction_expression): Likewise.

2019-09-10  Marek Polacek  <polacek@redhat.com>

        PR c++/91705 - constexpr evaluation rejects ++/-- on floats.
        * constexpr.c (cxx_eval_increment_expression): Call fold_simple on
        the offset.

2019-09-10  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (has_designator_problem): Use cp_expr_loc_or_input_loc
        in error_at.
        (build_enumerator): Likewise.
        (cp_finish_decl): Use DECL_SOURCE_LOCATION.
        (grokdeclarator): Use id_loc in two error_at; change errror
        message about constinit together constexpr to use two ranges.

2019-09-09  Marek Polacek  <polacek@redhat.com>

        PR c++/84374 - diagnose invalid uses of decltype(auto).
        * decl.c (grokdeclarator): Diagnose wrong usage of decltype(auto) in
        a function declaration.

2019-09-06  Nathan Sidwell  <nathan@acm.org>

        PR c++/91125
        * cp-tree.h (IDENTIFIER_REPO_CHOSEN, DECL_REPO_AVAILABLE_P): Delete.
        (struct lang_decl_base): Remove repo_available_p.
        * decl.c (duplicate_decls): Don't copy DECL_REPO_AVAILABLE_P.

        (Reserve TREE_LANG_FLAG_3 for modules.
        * cp-tree.h (DECL_CONSTRUCTION_VTABLE_P): Delete.
        (DECL_NON_TRIVIALLY_INITIALIZED_P): Move to TREE_LANG_FLAG_6.
        * class.c (build_ctor_vtbl_group): Don't set
        DECL_CONSTRUCTION_VTABLE_P.
        * decl2.c (determine_visibility_from_class): Don't check
        DECL_CONSTRUCTION_VTABLE_P anymore.

2019-09-06  Martin Liska  <mliska@suse.cz>

        PR c++/91125
        * Make-lang.in: Remove repo.o.
        * config-lang.in: Likewise.
        * cp-tree.h (init_repo): Remove declarations
        of repo-related functions.
        (repo_emit_p): Likewise.
        (repo_export_class_p): Likewise.
        (finish_repo): Likewise.
        * decl2.c (import_export_class): Always
        set -1 value/
        (mark_needed): Remove -frepo from comment.
        (import_export_decl): Similarly here.
        (c_parse_final_cleanups): Remove call of finish_repo.
        * lex.c (cxx_init): Remove call to init_repo.
        * optimize.c (can_alias_cdtor): Remove dead condition.
        * pt.c (push_template_decl_real): Update comment.
        (instantiate_decl): Remove dead code used for -frepo.
        * repo.c: Remove.

2019-09-05  Marek Polacek  <polacek@redhat.com>

        PR c++/91644 - ICE with constinit in function template.
        * decl.c (start_decl): Call retrofit_lang_decl for constinit variables.
        * pt.c (tsubst_expr): Pass LOOKUP_CONSTINIT down to cp_finish_decl for
        constinit variables.

2019-09-05  Nathan Sidwell  <nathan@acm.org>

        * cp-tree.h (DECL_VTABLE_OR_VTT_P): Forward to DECL_VIRTUAL_P.

2019-09-04  Marek Polacek  <polacek@redhat.com>

        * call.c (build_over_call): Remove -fdeduce-init-list implementation.
        * pt.c (unify): Likewise.

2019-09-01  Marek Polacek  <polacek@redhat.com>

        PR c++/91129 - wrong error with binary op in template argument.
        * typeck.c (warn_for_null_address): Use fold_for_warn instead of
        fold_non_dependent_expr.
        (cp_build_binary_op): Likewise.

2019-08-30  Jason Merrill  <jason@redhat.com>

        Add source location to TRAIT_EXPR.
        * cp-tree.h (TRAIT_EXPR_LOCATION): New.
        (struct tree_trait_expr): Add locus field.
        * parser.c (cp_parser_trait_expr): Pass trait_loc down.
        * pt.c (tsubst_copy_and_build) [TRAIT_EXPR]: Likewise.
        * semantics.c (finish_trait_expr): Add location parm.
        * tree.c (cp_expr_location): Handle TRAIT_EXPR.

2019-08-29  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (check_var_type): Add location_t parameter and use it.
        (grokdeclarator): Adjust call.
        * pt.c (tsubst_decl): Likewise.
        * cp-tree.h: Adjust declaration.

2019-08-28  Marek Polacek  <polacek@redhat.com>

        Implement P1152R4: Deprecating some uses of volatile.
        PR c++/91361
        * cp-gimplify.c (cp_fold): Set TREE_THIS_VOLATILE.
        * decl.c (grokdeclarator): Warn about a volatile-qualified structured
        binding and return type.
        (grokparms): Warn about a volatile-qualified function parameter.
        * expr.c (mark_use) <case MODIFY_EXPR>: Emit a -Wvolatile warning.
        * typeck.c (cp_build_unary_op): Emit a -Wvolatile warning for pre and
        post ++/-- on a volatile operand.
        (genericize_compound_lvalue): Use a better location.  Don't lose
        TREE_THIS_VOLATILE.
        (cp_build_modify_expr): Emit a -Wvolatile warning for a compound
        assignment whose LHS is volatile-qualified.  Build the assignment with
        a more precise location.

2019-08-28  Marek Polacek  <polacek@redhat.com>

        PR c++/91360 - Implement C++20 P1143R2: constinit.
        * cp-tree.h (TINFO_VAR_DECLARED_CONSTINIT): Define.
        (LOOKUP_CONSTINIT): Define.
        (enum cp_decl_spec): Add ds_constinit.
        * decl.c (check_tag_decl): Give an error for constinit in type
        declarations.
        (check_initializer): Also check LOOKUP_CONSTINIT.
        (cp_finish_decl): Add checking for a constinit declaration.  Set
        TINFO_VAR_DECLARED_CONSTINIT.
        (grokdeclarator): Add checking for a declaration with the constinit
        specifier.
        * lex.c (init_reswords): Handle D_CXX20.
        * parser.c (cp_lexer_get_preprocessor_token): Pass a better location
        to warning_at.  Warn about C++20 keywords.
        (cp_keyword_starts_decl_specifier_p): Handle RID_CONSTINIT.
        (cp_parser_diagnose_invalid_type_name): Add an inform about constinit.
        (cp_parser_decomposition_declaration): Maybe pass LOOKUP_CONSTINIT to
        cp_finish_decl.
        (cp_parser_decl_specifier_seq): Handle RID_CONSTINIT.
        (cp_parser_init_declarator): Maybe pass LOOKUP_CONSTINIT to
        cp_finish_decl.
        (set_and_check_decl_spec_loc): Add "constinit".
        * pt.c (tsubst_decl): Set TINFO_VAR_DECLARED_CONSTINIT.
        (instantiate_decl): Maybe pass LOOKUP_CONSTINIT to cp_finish_decl.
        * typeck2.c (store_init_value): If a constinit variable wasn't
        initialized using a constant initializer, give an error.

2019-08-28  Nathan Sidwell  <nathan@acm.org>

        PR c++/90613
        * name-lookup.c (cp_emit_debug_info): Check for builtins during
        overload iteration.

2019-08-27  Marek Polacek  <polacek@redhat.com>

        PR c++/81676 - bogus -Wunused warnings in constexpr if.
        * semantics.c (maybe_mark_exp_read_r): New function.
        (finish_if_stmt): Call it on THEN_CLAUSE and ELSE_CLAUSE.

        PR c++/91428 - warn about std::is_constant_evaluated in if constexpr.
        * cp-tree.h (decl_in_std_namespace_p): Declare.
        * semantics.c (is_std_constant_evaluated_p): New.
        (finish_if_stmt_cond): Warn about "std::is_constant_evaluated ()" in
        an if-constexpr.
        * typeck.c (decl_in_std_namespace_p): No longer static.

2019-08-26  Jason Merrill  <jason@redhat.com>

        * decl.c (duplicate_decls): Always merge DECL_DECLARED_CONSTEXPR_P.

2019-08-26  Marek Polacek  <polacek@redhat.com>

        PR c++/91545 - ICE in constexpr store evaluation.
        * constexpr.c (cxx_eval_store_expression): Check FIELD_DECL instead
        of DECL_P.

2019-08-24  Nathan Sidwell  <nathan@acm.org>

        * class.c (check_for_overrides): Conversion operators need
        checking too.

2019-08-24  Paolo Carlini  <paolo.carlini@oracle.com>

        * semantics.c (finish_switch_cond): Improve error message location.

2019-08-23  Jason Merrill  <jason@redhat.com>

        * decl2.c (decl_dependent_p): New.
        (mark_used): Check it instead of just processing_template_decl.

2019-08-23  Jason Merrill  <jason@redhat.com>

        * parser.c (cp_parser_nested_name_specifier_opt): Avoid redundant
        error.

2019-08-23  Marek Polacek  <polacek@redhat.com>

        PR c++/91521 - wrong error with operator->.
        * decl.c (grokdeclarator): Return error_mark_node for an invalid
        trailing return type.

        PR c++/79817 - attribute deprecated on namespace.
        * cp-tree.h (cp_warn_deprecated_use_scopes): Declare.
        * decl.c (grokdeclarator): Call cp_warn_deprecated_use_scopes.
        (type_is_deprecated): Likewise.
        * decl2.c (cp_warn_deprecated_use_scopes): New function.
        * name-lookup.c (handle_namespace_attrs): Handle attribute deprecated.
        * parser.c (cp_parser_namespace_alias_definition): Call
        cp_warn_deprecated_use_scopes.
        (cp_parser_using_declaration): Likewise.
        (cp_parser_using_directive): Likewise.
        * semantics.c (finish_id_expression_1): Likewise.

2019-08-23  Nathan Sidwell  <nathan@acm.org>

        * class.c (check_for_override): Checking IDENTIFIER_VIRTUAL_P is
        sufficient, reorder DECL_OVERRIDE_P check.

2019-08-23  Iain Sandoe  <iain@sandoe.co.uk>

        PR pch/61250
        * parser.c (cp_parser_initial_pragma): Call c_common_no_more_pch ()
        after determining that the first token is not
        PRAGMA_GCC_PCH_PREPROCESS.

2019-08-22  Marek Polacek  <polacek@redhat.com>

        PR c++/91304 - prefix attributes ignored in condition.
        * parser.c (cp_parser_condition): Handle prefix attributes.

2019-08-21  Richard Sandiford  <richard.sandiford@arm.com>

        PR c++/91505
        * decl.c (duplicate_decls): Call copy_attributes_to_builtin inside
        the BUILT_IN_NORMAL block rather than afterward.

2019-08-19  Marek Polacek  <polacek@redhat.com>

        PR c++/91264 - detect modifying const objects in constexpr.
        * constexpr.c (modifying_const_object_error): New function.
        (cxx_eval_call_expression): Set TREE_READONLY on a CONSTRUCTOR of
        a const-qualified object after it's been fully constructed.
        (modifying_const_object_p): New function.
        (cxx_eval_store_expression): Detect modifying a const object
        during constant expression evaluation.
        (cxx_eval_increment_expression): Use a better location when building
        up the store.
        (cxx_eval_constant_expression) <case DECL_EXPR>: Mark a constant
        object's constructor TREE_READONLY.

2019-08-15  Jason Merrill  <jason@redhat.com>

        PR c++/90393 - ICE with thow in ?:

        PR c++/64372, DR 1560 - Gratuitous lvalue-to-rvalue conversion in ?:
        * tree.c (lvalue_kind): Handle throw in one arm.
        * typeck.c (rationalize_conditional_expr): Likewise.
        (cp_build_modify_expr): Likewise.

2019-08-14  Jason Merrill  <jason@redhat.com>

        Implement P0848R3, Conditionally Trivial Special Member Functions.
        * tree.c (special_memfn_p): New.
        * class.c (add_method): When overloading, hide ineligible special
        member fns.
        (check_methods): Set TYPE_HAS_COMPLEX_* here.
        * decl.c (grok_special_member_properties): Not here.
        * name-lookup.c (push_class_level_binding_1): Move overloaded
        functions case down, accept FUNCTION_DECL as target_decl.

2019-08-14  Jonathan Wakely  <jwakely@redhat.com>

        PR c++/91436
        * name-lookup.c (get_std_name_hint): Fix min_dialect field for
        complex_literals and make_unique entries.

2019-08-14  Jakub Jelinek  <jakub@redhat.com>
            Marek Polacek  <polacek@redhat.com>

        PR c++/91391 - bogus -Wcomma-subscript warning.
        * parser.c (cp_parser_postfix_open_square_expression): Don't warn about
        a deprecated comma here.  Pass warn_comma_subscript down to
        cp_parser_expression.
        (cp_parser_expression): New bool parameter.  Warn about uses of a comma
        operator within a subscripting expression.
        (cp_parser_skip_to_closing_square_bracket): Revert to pre-r274121 state.
        (cp_parser_skip_to_closing_square_bracket_1): Remove.

2019-08-14  Jonathan Wakely  <jwakely@redhat.com>

        * name-lookup.c (get_std_name_hint): Add more entries.

2019-08-14  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl2.c (grok_array_decl): Use the location of the open square
        bracket in error message about invalid types.

2019-08-14  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Check here for typedef a function
        definition or a member function definition.
        (start_function): Adjust.
        (grokmethod): Likewise.

2019-08-13  Richard Sandiford  <richard.sandiford@arm.com>

        PR middle-end/91421
        * decl.c (duplicate_decls):  Use copy_decl_built_in_function.
        * pt.c (declare_integer_pack): Use set_decl_built_in_function.

2019-08-13  Marek Polacek  <polacek@redhat.com>

        PR c++/90473 - wrong code with nullptr in default argument.
        * call.c (null_ptr_cst_p): Update quote from the standard.
        * decl.c (check_default_argument): Don't return nullptr when the arg
        has side-effects.

2019-08-13  Marek Polacek  <polacek@redhat.com>

        * cp-tree.h (DECL_MUTABLE_P): Use FIELD_DECL_CHECK.

2019-08-10  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (cp_parser_omp_clause_name): Parse device_type.
        (cp_parser_omp_clause_device_type): New function.
        (cp_parser_omp_all_clauses): Handle PRAGMA_OMP_CLAUSE_DEVICE_TYPE.
        (OMP_DECLARE_TARGET_CLAUSE_MASK): Add PRAGMA_OMP_CLAUSE_DEVICE_TYPE.
        (cp_parser_omp_declare_target): Handle device_type clauses.  Remove
        diagnostics for declare target with clauses nested in clause-less
        declare target declaration-definition-seq.
        * semantics.c (finish_omp_clauses): Handle OMP_CLAUSE_DEVICE_TYPE.

2019-08-09  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (check_no_duplicate_clause): Simplify using
        omp_find_clause.
        (cp_parser_omp_clause_if): Fix up printing of target {enter,exit} data
        directive name modifiers.

        PR c/91401
        * parser.c (cp_parser_omp_clause_dist_schedule): Comment out the
        check_no_duplicate_clause call, instead emit a warning for duplicate
        dist_schedule clauses.

2019-08-08  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Use id_loc and EXPR_LOCATION in
        a few error messages.

2019-08-08  Marek Polacek  <polacek@redhat.com>

        PR c++/87519 - bogus warning with -Wsign-conversion.
        * typeck.c (cp_build_binary_op): Use same_type_p instead of comparing
        the types directly.

        * constexpr.c (inline_asm_in_constexpr_error): New.
        (cxx_eval_constant_expression) <case ASM_EXPR>: Call it.
        (potential_constant_expression_1) <case ASM_EXPR>: Likewise.

2019-08-08  Jakub Jelinek  <jakub@redhat.com>

        * semantics.c (finish_omp_clauses): For C_ORT_OMP
        OMP_CLAUSE_USE_DEVICE_* clauses use oacc_reduction_head bitmap
        instead of generic_head to track duplicates.

2019-08-07  Marek Polacek  <polacek@redhat.com>

        PR c++/81429 - wrong parsing of constructor with C++11 attribute.
        * parser.c (cp_parser_constructor_declarator_p): Handle the scenario
        when a parameter declaration begins with [[attribute]].

2019-08-07  Marek Polacek  <polacek@redhat.com>

        PR c++/91346 - Implement P1668R1, allow unevaluated asm in constexpr.
        * constexpr.c (cxx_eval_constant_expression): Handle ASM_EXPR.
        (potential_constant_expression_1) <case ASM_EXPR>: Allow.
        * cp-tree.h (finish_asm_stmt): Adjust.
        * parser.c (cp_parser_asm_definition): Grab the locaion of "asm" and
        use it.  Change an error to a pedwarn.  Allow asm in C++2a, warn
        otherwise.
        * pt.c (tsubst_expr): Pass a location down to finish_asm_stmt.
        * semantics.c (finish_asm_stmt): New location_t parameter.  Use it.

2019-08-07  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (cp_parser_omp_clause_name): Parse use_device_addr clause.
        (cp_parser_omp_all_clauses): Handle PRAGMA_OMP_CLAUSE_USE_DEVICE_ADDR.
        (OMP_TARGET_DATA_CLAUSE_MASK): Add PRAGMA_OMP_CLAUSE_USE_DEVICE_ADDR.
        (cp_parser_omp_target_data): Handle PRAGMA_OMP_CLAUSE_USE_DEVICE_ADDR
        like PRAGMA_OMP_CLAUSE_USE_DEVICE_PTR, adjust diagnostics about no
        map or use_device_* clauses.
        * semantics.c (finish_omp_clauses): For OMP_CLAUSE_USE_DEVICE_PTR
        in OpenMP, require pointer or reference to pointer type rather than
        pointer or array or reference to pointer or array type. Handle
        OMP_CLAUSE_USE_DEVICE_ADDR.
        * pt.c (tsubst_omp_clauses): Handle OMP_CLAUSE_USE_DEVICE_ADDR.

2019-08-06  Jason Merrill  <jason@redhat.com>

        PR c++/91378 - ICE with noexcept and auto return type.
        * pt.c (maybe_instantiate_noexcept): push_to_top_level.

2019-08-06  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (check_array_designated_initializer): Use
        cp_expr_loc_or_input_loc in one place.

2019-08-06  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (cp_parser_omp_for_loop): For OMP_LOOP, ignore parallel
        clauses and predetermine iterator as lastprivate.
        * semantics.c (handle_omp_for_class_iterator): Use
        OMP_CLAUSE_LASTPRIVATE_LOOP_IV instead of
        OMP_CLAUSE_LASTPRIVATE_TASKLOOP_IV, set it for lastprivate also
        on OMP_LOOP construct.  If a clause is missing for class iterator
        on OMP_LOOP, add firstprivate clause, and if there is private
        clause, turn it into firstprivate too.
        (finish_omp_for): Formatting fix.  For OMP_LOOP, adjust
        OMP_CLAUSE_LASTPRIVATE_LOOP_IV clause CP_CLAUSE_INFO, so that it
        uses copy ctor instead of default ctor.
        * cp-gimplify.c (cp_gimplify_expr): Handle OMP_LOOP like
        OMP_DISTRIBUTE etc.
        (cp_fold_r): Likewise.
        (cp_genericize_r): Likewise.
        (cxx_omp_finish_clause): Also finish lastprivate clause with
        OMP_CLAUSE_LASTPRIVATE_LOOP_IV flag.
        * pt.c (tsubst_omp_clauses): Handle OMP_CLAUSE_BIND.
        (tsubst_omp_for_iterator): For OMP_LOOP, ignore parallel
        clauses and predetermine iterator as lastprivate.
        * constexpr.c (potential_constant_expression_1): Handle OMP_LOOP
        like OMP_DISTRIBUTE etc.

2019-08-05  Marek Polacek  <polacek@redhat.com>

        DR 2413 - typename in conversion-function-ids.
        * parser.c (cp_parser_conversion_type_id): Call
        cp_parser_type_specifier_seq with CP_PARSER_FLAGS_TYPENAME_OPTIONAL
        instead of CP_PARSER_FLAGS_NONE.

2019-08-05  Paolo Carlini  <paolo.carlini@oracle.com>

        * cp-tree.h (cp_expr_loc_or_input_loc): New.
        (cxx_incomplete_type_diagnostic): Use it.
        * call.c (build_converted_constant_expr_internal, convert_like_real,
        convert_arg_to_ellipsis, convert_for_arg_passing, build_over_call,
        build_cxx_call, perform_implicit_conversion_flags,
        initialize_reference): Likewise.
        * constexpr.c (cxx_eval_internal_function, cxx_eval_call_expression,
        eval_and_check_array_index, cxx_eval_store_expression,
        cxx_eval_statement_list, cxx_eval_loop_expr,
        cxx_eval_constant_expression, potential_constant_expression_1):
        Likewise.
        * constraint.cc (check_for_logical_overloads,
        satisfy_predicate_constraint): Likewise.
        * cp-gimplify.c (cp_gimplify_expr): Likewise.
        * cvt.c (cp_convert_to_pointer, convert_to_reference,
        cp_convert_and_check, ocp_convert, maybe_warn_nodiscard): Likewise.
        * decl.c (pop_switch): Likewise.
        * decl2.c (delete_sanity): Likewise.
        * error.c (location_of): Likewise.
        * init.c (maybe_warn_list_ctor, build_aggr_init,
        warn_placement_new_too_small, build_new_1, build_vec_init): Likewise.
        * lex.c (unqualified_name_lookup_error): Likewise.
        * parser.c (cp_parser_initializer_list, cp_parser_omp_for_cond):
        Likewise.
        * pt.c (check_for_bare_parameter_packs, check_valid_ptrmem_cst_expr,
        unify_arg_conversion, convert_nontype_argument,
        tsubst_copy_and_build, resolve_typename_type): Likewise.
        * semantics.c (maybe_convert_cond, finish_call_expr,
        cp_build_vec_convert): Likewise.
        * typeck.c (decay_conversion, rationalize_conditional_expr,
        cp_build_unary_op, build_x_compound_expr_from_list,
        maybe_warn_about_returning_address_of_local,
        maybe_warn_pessimizing_move): Likewise.
        * typeck2.c (check_narrowing, digest_init_r,
        process_init_constructor_array): Likewise.

2019-08-05  Tom Honermann  <tom@honermann.net>

        * parser.c (cp_parser_template_declaration_after_parameters): Enable
        class template argument deduction for non-type template parameters
        in literal operator templates.

2019-08-05  Marek Polacek  <polacek@redhat.com>

        PR c++/91338 - Implement P1161R3: Deprecate a[b,c].
        * parser.c (cp_parser_postfix_open_square_expression): Warn about uses
        of a comma operator within a subscripting expression.
        (cp_parser_skip_to_closing_square_bracket_1): New function, made out
        of...
        (cp_parser_skip_to_closing_square_bracket): ...this.

2019-08-05  Jason Merrill  <jason@redhat.com>

        * semantics.c (force_paren_expr): Preserve location.

2019-08-02  Marek Polacek  <polacek@redhat.com>

        PR c++/91230 - wrong error with __PRETTY_FUNCTION__ and generic lambda.
        * pt.c (value_dependent_expression_p): Consider __PRETTY_FUNCTION__
        inside a template function value-dependent.

2019-08-02  Paolo Carlini  <paolo.carlini@oracle.com>

        * tree.c (handle_nodiscard_attribute): Do not warn about nodiscard
        applied to a constructor.

2019-08-02  Martin Liska  <mliska@suse.cz>

        * decl.c (grok_op_properties):
        Mark DECL_SET_IS_OPERATOR_DELETE for user-provided delete operators.

2019-08-01  Martin Sebor  <msebor@redhat.com>

        PR c++/90947
        * decl.c (reshape_init_array_1): Avoid truncating initializer
        lists containing string literals.

2019-08-01  Marek Polacek  <polacek@redhat.com>

        PR c++/90805 - detect narrowing in case values.
        * decl.c (case_conversion): Detect narrowing in case values.

2019-07-31  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl2.c (delete_sanity): Improve diagnostic locations, use
        cp_expr_loc_or_loc in four places.

2019-07-31  Jason Merrill  <jason@redhat.com>

        PR c++/90538 - multiple expansions of capture packs
        * cp-tree.h (DECLTYPE_FOR_INIT_CAPTURE): Remove.
        * lambda.c (add_capture): Copy parameter packs from init.
        (lambda_capture_field_type): Always use auto for init-capture.
        * pt.c (uses_parameter_packs): Return tree.
        (tsubst) [DECLTYPE_TYPE]: Remove init-capture handling.
        (gen_elem_of_pack_expansion_instantiation): Don't push
        local_specialization_stack.
        (prepend_one_capture): New.
        (tsubst_lambda_expr): Use it.  Don't touch local_specializations.
        (do_auto_deduction): Avoid redundant error.

        Fix copy_node of TEMPLATE_INFO.
        * cp-tree.h (struct tree_template_info): Use tree_base instead of
        tree_common.  Add tmpl and args fields.
        (TI_TEMPLATE, TI_ARGS): Adjust.

2019-07-30  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/91270
        * tree-ssa-dce.c (propagate_necessity): Mark 2nd argument
        of delete operator as needed.

2019-07-25  Martin Liska  <mliska@suse.cz>
            Dominik Infuhr  <dominik.infuehr@theobroma-systems.com>

        PR c++/23383
        * decl.c (cxx_init_decl_processing): Mark delete operators
        with DECL_SET_IS_OPERATOR_DELETE.

2019-07-25  Martin Liska  <mliska@suse.cz>

        * decl.c (duplicate_decls): Use new macros
        (e.g. DECL_SET_LAMBDA_FUNCTION and DECL_LAMBDA_FUNCTION_P).
        (cxx_init_decl_processing): Likewise.
        (grok_op_properties): Likewise.
        * parser.c (cp_parser_lambda_declarator_opt): Likewise.

2019-07-24  Martin Sebor  <msebor@redhat.com>

        PR driver/80545
        * decl.c (finish_function): Use lang_mask.

2019-07-20  Jason Merrill  <jason@redhat.com>

        * cp-tree.h (ovl_iterator::using_p): A USING_DECL by itself was also
        introduced by a using-declaration.

2019-07-20  Jason Merrill  <jason@redhat.com>

        Reduce memory consumption for push/pop_access_scope.
        * name-lookup.c (leave_scope): Do add class levels other than
        previous_class_level to free_binding_level.
        (invalidate_class_lookup_cache): Move from class.c, add to
        free_binding_level.
        * pt.c (saved_access_scope): Change from list to vec.

2019-07-20  Jakub Jelinek  <jakub@redhat.com>

        * cp-tree.h (OMP_FOR_GIMPLIFYING_P): Use OMP_LOOPING_CHECK
        instead of OMP_LOOP_CHECK.
        * parser.c (cp_parser_omp_clause_name): Handle bind clause.
        (cp_parser_omp_clause_bind): New function.
        (cp_parser_omp_all_clauses): Handle PRAGMA_OMP_CLAUSE_BIND.
        (OMP_LOOP_CLAUSE_MASK): Define.
        (cp_parser_omp_loop): New function.
        (cp_parser_omp_parallel, cp_parser_omp_teams): Handle parsing of
        loop combined with parallel or teams.
        (cp_parser_omp_construct): Handle PRAGMA_OMP_LOOP.
        (cp_parser_pragma): Likewise.
        * pt.c (tsubst_expr): Handle OMP_LOOP.
        * semantics.c (finish_omp_clauses): Handle OMP_CLAUSE_BIND.

2019-07-19  Jason Merrill  <jason@redhat.com>

        PR c++/90101 - dependent class non-type parameter.
        * pt.c (invalid_nontype_parm_type_p): Check for dependent class type.

2019-07-18  Jason Merrill  <jason@redhat.com>

        PR c++/90098 - partial specialization and class non-type parms.
        PR c++/90099
        PR c++/90101
        * call.c (build_converted_constant_expr_internal): Don't copy.
        * pt.c (process_partial_specialization): Allow VIEW_CONVERT_EXPR
        around class non-type parameter.
        (unify) [TEMPLATE_PARM_INDEX]: Ignore cv-quals.

2019-07-16  Jason Merrill  <jason@redhat.com>

        * parser.c (make_location): Add overload taking cp_lexer* as last
        parameter.

        * parser.c (cp_parser_simple_type_specifier): Separate tentative
        parses for optional type-spec and CTAD.

        * parser.c (cp_parser_nested_name_specifier_opt): If the token is
        already CPP_NESTED_NAME_SPECIFIER, leave it alone.

2019-07-12  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (cp_parser_omp_clause_name): Handle order clause.
        (cp_parser_omp_clause_order): New function.
        (cp_parser_omp_all_clauses): Handle PRAGMA_OMP_CLAUSE_ORDER.
        (OMP_SIMD_CLAUSE_MASK, OMP_FOR_CLAUSE_MASK): Add
        PRAGMA_OMP_CLAUSE_ORDER.
        * semantics.c (finish_omp_clauses): Handle OMP_CLAUSE_ORDER.
        * pt.c (tsubst_omp_clauses): Likewise.

2019-07-10  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (get_type_quals,
        smallest_type_location (const cp_decl_specifier_seq*)): New.
        (check_tag_decl): Use smallest_type_location in error_at about
        multiple types in one declaration.
        (grokdeclarator): Use locations[ds_complex] in error_at about
        complex invalid; use locations[ds_storage_class] in error_at
        about static cdtor; use id_loc in error_at about flexible
        array member in union; use get_type_quals.

2019-07-09  Martin Sebor  <msebor@redhat.com>

        PR c++/61339
        * cp-tree.h: Change class-key of PODs to struct and others to class.
        * search.c: Same.
        * semantics.c (finalize_nrv_r): Same.

2019-07-09  Martin Sebor  <msebor@redhat.com>

        PR c++/61339
        * constexpr.c (cxx_eval_call_expression): Change class-key from class
        to struct and vice versa to match convention and avoid -Wclass-is-pod
        and -Wstruct-no-pod.
        * constraint.cc (get_concept_definition): Same.
        * cp-tree.h: Same.
        * cxx-pretty-print.h: Same.
        * error.c: Same.
        * logic.cc (term_list::replace): Same.
        * name-lookup.c (find_local_binding): Same.
        * pt.c (tsubst_binary_right_fold): Same.
        * search.c (field_accessor_p): Same.
        * semantics.c (expand_or_defer_fn): Same.

2019-07-08  Jakub Jelinek  <jakub@redhat.com>

        PR c++/91110
        * decl2.c (cp_omp_mappable_type_1): Don't emit any note for
        error_mark_node type.

2019-07-05  Jakub Jelinek  <jakub@redhat.com>

        PR c++/67184
        PR c++/69445
        * call.c (build_new_method_call_1): Remove set but not used variable
        binfo.

2019-07-05  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/67184 (again)
        PR c++/69445
        * call.c (build_over_call): Devirtualize user-defined operators
        coming from a base too.
        (build_new_method_call_1): Do not devirtualize here.

2019-07-04  Marek Polacek  <polacek@redhat.com>

        DR 1813
        PR c++/83374 - __is_standard_layout wrong for a class with repeated
        bases.
        * class.c (check_bases): Set CLASSTYPE_NON_STD_LAYOUT for a class if
        CLASSTYPE_REPEATED_BASE_P is true.

2019-07-04  Andrew Stubbs  <ams@codesourcery.com>

        * cp-tree.h (cp_omp_emit_unmappable_type_notes): New prototype.
        * decl.c (cp_finish_decl): Call cp_omp_emit_unmappable_type_notes.
        * decl2.c (cp_omp_mappable_type): Move contents to ...
        (cp_omp_mappable_type_1): ... here and add note output.
        (cp_omp_emit_unmappable_type_notes): New function.
        * semantics.c (finish_omp_clauses): Call
        cp_omp_emit_unmappable_type_notes in four places.

2019-07-03  Martin Liska  <mliska@suse.cz>

        * call.c (build_new_op_1): Remove dead assignemts.
        * typeck.c (cp_build_binary_op): Likewise.

2019-06-27  Jason Merrill  <jason@redhat.com>

        PR c++/55442 - memory-hog with highly recursive constexpr.
        * constexpr.c (push_cx_call_context): Return depth.
        (cxx_eval_call_expression): Don't cache past constexpr_cache_depth.

2019-06-27  Jan Hubicka  <jh@suse.cz>

        * class.c (layout_class_type): Set TYPE_CXX_ODR_P for as-base
        type copy.

2019-06-27  Martin Liska  <mliska@suse.cz>

        * class.c (adjust_clone_args): Remove obviously
        dead assignments.
        (dump_class_hierarchy_r): Likewise.
        * decl.c (check_initializer): Likewise.
        * parser.c (cp_parser_lambda_expression): Likewise.
        * pt.c (unify_bound_ttp_args): Likewise.
        (convert_template_argument): Likewise.
        * rtti.c (build_headof): Likewise.
        * typeck.c (convert_for_initialization): Likewise.

2019-06-25  Jason Merrill  <jason@redhat.com>

        PR c++/70462 - unnecessary base ctor variant with final.
        * optimize.c (populate_clone_array): Skip base variant if
        CLASSTYPE_FINAL.
        (maybe_clone_body): We don't need an alias if we are only defining
        one clone.

        * class.c (resolves_to_fixed_type_p): Check CLASSTYPE_FINAL.

2019-06-25  Jakub Jelinek  <jakub@redhat.com>

        PR c++/90969
        * constexpr.c (cxx_eval_array_reference): Don't look through VCE from
        vector type if lval.

2019-06-25  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

        * lex.c (init_reswords): Create keyword for "__intN__" type.
        * cp-tree.h (cp_decl_specifier_seq): New bitfield "int_n_alt".
        * decl.c (grokdeclarator): Don't pedwarn about "__intN" ISO
        C incompatibility if alternate "__intN__" form is used.
        * parser.c (cp_parser_simple_type_specifier): Set
        decl_specs->int_n_alt if "__intN__" form is used.

2019-06-24  Jan Hubicka  <jh@suse.cz>

        * lex.c (cxx_make_type): Set TYPE_CXX_ODR_P.

2019-06-24  Jason Merrill  <jason@redhat.com>

        * class.c (layout_class_type): Don't use a separate
        CLASSTYPE_AS_BASE if it's the same size.

2019-06-23  Marek Polacek  <polacek@redhat.com>

        * call.c (convert_default_arg): Use DEFERRED_PARSE instead of
        DEFAULT_ARG.
        * cp-objcp-common.c (cp_tree_size): Likewise.  Use tree_deferred_parse
        instead of tree_default_arg.
        * cp-tree.def: Rename DEFAULT_ARG to DEFERRED_PARSE.
        * cp-tree.h: Rename DEFARG_TOKENS to DEFPARSE_TOKENS.  Rename
        DEFARG_INSTANTIATIONS to DEFPARSE_INSTANTIATIONS.  Rename
        tree_default_arg to tree_deferred_parse.
        (UNPARSED_NOEXCEPT_SPEC_P): Use DEFERRED_PARSE instead of DEFAULT_ARG.
        (cp_tree_node_structure_enum): Rename TS_CP_DEFAULT_ARG to
        TS_CP_DEFERRED_PARSE.
        (lang_tree_node): Rename tree_default_arg to tree_deferred_parse.
        Rename default_arg to deferred_parse.  Use TS_CP_DEFERRED_PARSE instead
        of TS_CP_DEFAULT_ARG.
        (defarg_location): Remove declaration.
        (defparse_location): Add declaration.
        * decl.c (grokfndecl): Use DEFERRED_PARSE instead of DEFAULT_ARG.
        Call defparse_location instead of defarg_location.
        (check_default_argument): Use DEFERRED_PARSE instead of DEFAULT_ARG.
        (cp_tree_node_structure): Likewise.  Use TS_CP_DEFERRED_PARSE instead
        of TS_CP_DEFAULT_ARG.
        * decl2.c (grokfield): Use DEFERRED_PARSE instead of DEFAULT_ARG.
        * error.c (dump_expr): Likewise.
        (location_of): Likewise.
        * init.c (get_nsdmi): Likewise.
        * parser.c (cp_parser_save_noexcept): Likewise.  Use DEFPARSE_TOKENS
        instead of DEFARG_TOKENS.
        (cp_parser_late_noexcept_specifier): Likewise.
        (cp_parser_late_parse_one_default_arg): Use DEFPARSE_TOKENS instead
        of DEFARG_TOKENS.
        (cp_parser_late_parsing_default_args): Use DEFERRED_PARSE instead of
        DEFAULT_ARG.  Use DEFPARSE_INSTANTIATIONS instead of
        DEFARG_INSTANTIATIONS.
        (cp_parser_cache_defarg): Use DEFERRED_PARSE instead of DEFAULT_ARG.
        Use DEFPARSE_TOKENS instead of DEFARG_TOKENS.  Use
        DEFPARSE_INSTANTIATIONS instead of DEFARG_INSTANTIATIONS.
        (defparse_location): Renamed from defarg_location.
        * pt.c (tsubst_default_argument): Use DEFERRED_PARSE instead of
        DEFAULT_ARG.
        (tsubst_arg_types): Likewise.
        (dependent_type_p_r): Likewise.
        * tree.c (cp_tree_equal): Likewise.
        (cp_walk_subtrees): Likewise.
        * typeck.c (convert_arguments): Likewise.

2019-06-22  Marek Polacek  <polacek@redhat.com>

        PR c++/86476 - noexcept-specifier is a complete-class context.
        PR c++/52869
        * cp-tree.def (DEFAULT_ARG): Update commentary.
        * cp-tree.h (UNPARSED_NOEXCEPT_SPEC_P): New macro.
        (tree_default_arg): Use tree_base instead of tree_common.
        (do_push_parm_decls, maybe_check_overriding_exception_spec): Declare.
        * decl.c (do_push_parm_decls): New function, broken out of...
        (store_parm_decls): ...here.  Call it.
        * except.c (nothrow_spec_p): Accept DEFAULT_ARG in the assert.
        * parser.c (cp_parser_noexcept_specification_opt,
        cp_parser_late_noexcept_specifier, noexcept_override_late_checks):
        Forward-declare.
        (unparsed_noexcepts): New macro.
        (push_unparsed_function_queues): Update initializer.
        (cp_parser_direct_declarator): Pass FRIEND_P to
        cp_parser_exception_specification_opt.
        (inject_parm_decls): New.
        (pop_injected_parms): New.
        (cp_parser_class_specifier_1): Implement delayed parsing of
        noexcept-specifiers.
        (cp_parser_save_noexcept): New.
        (cp_parser_late_noexcept_specifier): New.
        (noexcept_override_late_checks): New.
        (cp_parser_noexcept_specification_opt): Add FRIEND_P parameter.  Call
        cp_parser_save_noexcept instead of the normal processing if needed.
        (cp_parser_exception_specification_opt): Add FRIEND_P parameter and
        pass it to cp_parser_noexcept_specification_opt.
        (cp_parser_save_member_function_body): Fix comment.
        (cp_parser_save_default_args): Maybe save the noexcept-specifier to
        post process.
        (cp_parser_transaction): Update call to
        cp_parser_noexcept_specification_opt.
        (cp_parser_transaction_expression): Likewise.
        * parser.h (cp_unparsed_functions_entry): Add new field to carry
        a noexcept-specifier.
        * pt.c (dependent_type_p_r): Handle unparsed noexcept expression.
        * search.c (maybe_check_overriding_exception_spec): New function, broken
        out of...
        (check_final_overrider): ...here.  Call
        maybe_check_overriding_exception_spec.
        * tree.c (canonical_eh_spec): Handle UNPARSED_NOEXCEPT_SPEC_P.
        (cp_tree_equal): Handle DEFAULT_ARG.

        PR c++/90881 - bogus -Wunused-value in unevaluated context.
        * cvt.c (convert_to_void): Don't emit unused warnings in
        an unevaluated context.

2019-06-22  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Use id_loc, typespec_loc, and
        locations[ds_storage_class] in a few additional places.

2019-06-21  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/90909
        Revert:
        2019-05-21  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/67184
        PR c++/69445
        * call.c (build_over_call): Devirtualize when the final overrider
        comes from the base.

2019-06-21  Marek Polacek  <polacek@redhat.com>

        PR c++/61490 - qualified-id in friend function definition.
        * decl.c (grokdeclarator): Diagnose qualified-id in friend function
        definition.  Improve location for diagnostics of friend functions.

        PR c++/60223 - ICE with T{} in non-deduced context.
        * pt.c (unify): Allow COMPOUND_LITERAL_P in a non-deduced context.

        PR c++/64235 - missing syntax error with invalid alignas.
        * parser.c (cp_parser_std_attribute_spec): Commit to tentative parse
        if there's a missing close paren.

        PR c++/90490 - fix decltype issues in noexcept-specifier.
        * except.c (build_noexcept_spec): Call
        instantiate_non_dependent_expr_sfinae before
        build_converted_constant_expr instead of calling
        instantiate_non_dependent_expr after it.  Add
        processing_template_decl_sentinel.

2019-06-21  Jakub Jelinek  <jakub@redhat.com>

        PR c++/90950
        * semantics.c (finish_omp_clauses): Don't reject references to
        incomplete types if processing_template_decl.

2019-06-19  Marek Polacek  <polacek@redhat.com>

        PR c++/60364 - noreturn after first decl not diagnosed.
        * decl.c (duplicate_decls): Give an error when a function is
        declared [[noreturn]] after its first declaration.
        * parser.c (cp_parser_std_attribute): Don't treat C++11 noreturn
        attribute as equivalent to GNU's.
        * tree.c (std_attribute_table): Add noreturn.

2019-06-19  Jakub Jelinek  <jakub@redhat.com>

        * cp-gimplify.c (cp_genericize_r): Handle OMP_CLAUSE_{IN,EX}CLUSIVE
        like OMP_CLAUSE_SHARED.

2019-06-18  Jason Merrill  <jason@redhat.com>

        * constexpr.c (cxx_eval_store_expression): Delay target evaluation.

2019-06-18  Jason Merrill  <jason@redhat.com>

        * constexpr.c (eval_and_check_array_index): Split out from...
        (cxx_eval_array_reference): ...here.
        (cxx_eval_store_expression): Use it here, too.
        (diag_array_subscript): Take location.  Strip location wrapper.

2019-06-18  Jason Merrill  <jason@redhat.com>

        * constexpr.c (cxx_eval_constant_expression): Handle conversion from
        and then to the same type.

2019-06-18  Jason Merrill  <jason@redhat.com>

        * constexpr.c (unshare_constructor): Add MEM_STAT_DECL.

2019-06-17  Jakub Jelinek  <jakub@redhat.com>

        * semantics.c (finish_omp_clauses): For OMP_CLAUSE_REDUCTION_INSCAN
        set need_copy_assignment.

2019-06-17  Marek Polacek  <polacek@redhat.com>

        PR c++/83820 - excessive attribute arguments not detected.
        * parser.c (cp_parser_std_attribute): Detect excessive arguments.

2019-06-17  Nathan Sidwell  <nathan@acm.org>

        PR c++/90754
        * name-lookup.c (lookup_type_scope_1): Calll qualify_lookup before
        checking context.

2019-06-14  Marek Polacek  <polacek@redhat.com>

        PR c++/90884 - stray note with -Wctor-dtor-privacy.
        * class.c (maybe_warn_about_overly_private_class): Guard the call to
        inform.

2019-06-12  Jason Merrill  <jason@redhat.com>

        PR c++/85552 - wrong instantiation of dtor for DMI.
        * typeck2.c (digest_nsdmi_init): Set tf_no_cleanup for direct-init.

2019-06-13  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Use id_loc in five additional places
        in the last part of the function.

2019-06-13  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Move further up the declaration of
        id_loc, use it immediately, update its value after the loop
        over declarator, use it again in the final part of function;
        improve locations of error messages about multiple data types
        and conflicting specifiers.

2019-06-13  Richard Biener  <rguenther@suse.de>

        PR c++/90801
        * typeck2.c (split_nonconstant_init_1): Properly count
        num_split_elts, optimize single constructor elt removal.

2019-06-12  Marek Polacek  <polacek@redhat.com>

        PR c++/66999 - 'this' captured by reference.
        * parser.c (cp_parser_lambda_introducer): Reject `&this'.  Use
        cp_lexer_nth_token_is instead of cp_lexer_peek_nth_token.

        PR c++/90825 - endless recursion when evaluating sizeof.
        PR c++/90832 - endless recursion when evaluating sizeof.
        * constexpr.c (cxx_eval_constant_expression): Don't recurse on the
        result of fold_sizeof_expr if is returns a SIZEOF_EXPR.
        * typeck.c (cxx_sizeof_expr): Only return a SIZEOF_EXPR if the operand
        is instantiation-dependent.

        PR c++/90736 - bogus error with alignof.
        * constexpr.c (adjust_temp_type): Use cv_unqualified type.

2019-06-11  Matthew Beliveau  <mbelivea@redhat.com>

        PR c++/90449 - add -Winaccessible-base option.
        * class.c (warn_about_ambiguous_bases): Changed name to:
        maybe_warn_about_inaccessible_bases.
        (maybe_warn_about_inaccessible_bases): Implemented new
        Winaccessible-base warning option for both direct and virtual
        base warnings.
        (layout_class_type): Call to warn_about_ambiguous_bases changed to fit
        new name.

2019-06-11  Richard Biener  <rguenther@suse.de>

        PR c++/90801
        * typeck2.c (split_nonconstant_init_1): Avoid ordered remove
        from CONSTRUCTOR by marking to remove elements and doing all
        of them in a O(n) scan.

2019-06-11  Jakub Jelinek  <jakub@redhat.com>

        PR c++/90810
        * init.c (constant_value_1): Handle VECTOR_CST DECL_INITIAL for
        !DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P decls like CONSTRUCTOR.

2019-06-11  Martin Liska  <mliska@suse.cz>

        PR c++/87847
        * pt.c (init_template_processing): Disable hash table
        sanitization for decl_specializations and type_specializations.

2019-06-10  Jason Merrill  <jason@redhat.com>

        * constexpr.c (free_constructor): New.
        (cxx_eval_call_expression): Free parameter value CONSTRUCTORs.

        * constexpr.c (unshare_constructor): Only unshare if T is itself a
        CONSTRUCTOR.
        (cxx_eval_call_expression): Don't call it on the result here.

        Reduce constexpr_call memory consumption.
        * constexpr.c (cxx_bind_parameters_in_call): Use TREE_VEC rather
        than TREE_LIST.
        (constexpr_call_hasher::equal, cxx_bind_parameters_in_call)
        (cxx_eval_call_expression): Adjust.

2019-06-10  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (cp_parser_omp_clause_reduction): Don't sorry_at on inscan
        reductions.
        (cp_parser_omp_scan_loop_body): New function.
        (cp_parser_omp_for_loop): Call cp_parser_omp_scan_loop_body if there
        are inscan reduction clauses.
        (cp_parser_pragma): Reject PRAGMA_OMP_SCAN.
        * semantics.c (finish_omp_clauses): Reject mixing inscan with
        non-inscan reductions on the same construct, or inscan reductions with
        ordered or schedule clauses, or inscan array reductions.
        * pt.c (tsubst_omp_clauses): Handle OMP_CLAUSE_{IN,EX}CLUSIVE.
        (tsubst_expr): Handle OMP_SCAN.

2019-06-07  Jason Merrill  <jason@redhat.com>

        * constexpr.c (cxx_eval_constant_expression): Call
        STRIP_ANY_LOCATION_WRAPPER early.
        [CONVERT_EXPR]: Don't build anything for conversion to void.
        [ADDR_EXPR]: ggc_free unused ADDR_EXPR.

2019-06-05  Martin Sebor  <msebor@redhat.com>

        PR c/90737
        * typeck.c (maybe_warn_about_returning_address_of_local): Only
        consider functions returning pointers as candidates for
        -Wreturn-local-addr.

2019-06-05  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (smallest_type_location): New.
        (check_special_function_return_type): Use it.
        (grokdeclarator): Lkewise.

2019-06-05  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Use locations[ds_friend]
        in one place.

2019-06-05  Martin Sebor  <msebor@redhat.com>

        * call.c (build_conditional_expr_1): Adjust quoting and hyphenation.
        (convert_like_real): Same.
        (convert_arg_to_ellipsis): Same.
        * constexpr.c (diag_array_subscript): Same.
        * constraint.cc (diagnose_trait_expression): Same.
        * cvt.c (ocp_convert): Same.
        * decl.c (start_decl): Same.
        (check_for_uninitialized_const_var): Same.
        (grokfndecl): Same.
        (check_special_function_return_type): Same.
        (finish_enum_value_list): Same.
        (start_preparsed_function): Same.
        * parser.c (cp_parser_decl_specifier_seq): Same.
        * typeck.c (cp_build_binary_op): Same.
        (build_static_cast_1): Same.

2019-06-04  Nina Dinka Ranns  <dinka.ranns@gmail.com>

        PR c++/63149 - Wrong auto deduction from braced-init-list.
        * pt.c (listify_autos): use non cv qualified auto_node in
        std::initializer_list<auto>.

2019-06-04  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Use declarator->id_loc in two
        additional places.

2019-06-04  Nathan Sidwell  <nathan@acm.org>

        * name-lookup.c (lookup_type_scope_1): Reimplement, handle local
        and namespace scopes separately.

2019-06-04  Harald van Dijk  <harald@gigawatt.nl>

        PR c++/60531 - Wrong error about unresolved overloaded function
        * typeck.c (cp_build_binary_op): See if overload can be resolved.
        (cp_build_unary_op): Ditto.

2019-06-04  Jason Merrill  <jason@redhat.com>

        Reduce accumulated garbage in constexpr evaluation.
        * constexpr.c (cxx_eval_call_expression): ggc_free any bindings we
        don't save.
        (cxx_eval_increment_expression): ggc_free the MODIFY_EXPR after
        evaluating it.

2019-06-04  Jakub Jelinek  <jakub@redhat.com>

        * cp-tree.h (CP_OMP_CLAUSE_INFO): Allow for any clauses up to _condvar_
        instead of only up to linear.

2019-06-03  Paolo Carlini  <paolo.carlini@oracle.com>

        * parser.c (cp_parser_unqualified_id): Use build_min_nt_loc in
        five places.

2019-06-01  Ville Voutilainen  <ville.voutilainen@gmail.com>

        PR c++/85254
        * class.c (fixup_type_variants): Handle CLASSTYPE_FINAL.

2019-05-31  Nathan Sidwell  <nathan@acm.org>

        * cp-tree.h (IDENTIFIER_LAMBDA_P): New.
        (TYPE_ANON_P): New.
        (LAMBDA_TYPE_P, TYPE_UNNAMED_P): Likewise.
        (LAMBDANAME_PREFIX, LAMBDANAME_FORMAT): Delete.
        (make_lambda_name): Don't declare.
        * error.c (dump_aggr_type): Check for lambdas before other
        anonymous names.
        * lambda.c (begin_lambda_type): Use make_anon_name.
        * cp-lang.c (cxx_dwarf_name): Lambda names smell anonymous.
        * mangle.c (write_local_name): Likewise.
        * name-lookup.c (lambda_cnt, make_lambda_name): Delete.

2019-05-30  Marek Polacek  <polacek@redhat.com>

        * cp-tree.h (TYPE_HAS_NONTRIVIAL_DESTRUCTOR): Fix a typo.

2019-05-31  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Use declarator->id_loc in five
        error_at calls.

2019-05-29  Jakub Jelinek  <jakub@redhat.com>

        PR c++/90598
        * tree.c (lvalue_kind): Return clk_none for expressions with
        with VOID_TYPE_P.

2019-05-29  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/89875
        * parser.c (cp_parser_sizeof_operand): When the type-id production
        did not work out commit to the tentative parse.

2019-05-29  Jakub Jelinek  <jakub@redhat.com>

        P1091R3 - Extending structured bindings to be more like var decls
        P1381R1 - Reference capture of structured bindings
        * decl.c (cp_maybe_mangle_decomp): Handle TREE_STATIC decls even at
        function scope.
        (cp_finish_decomp): Copy over various decl properties from decl to
        v[i] in the tuple case.
        (grokdeclarator): Allow static, thread_local and __thread for C++2a
        and use pedwarn instead of error for older standard revisions.
        Make other structured binding diagnostic messages more i18n friendly.

2019-05-28  Nathan Sidwell  <nathan@acm.org>

        * decl.c (duplicate_decls): Assert a template newdecl has no
        specializations.

2019-05-28  Marek Polacek  <polacek@redhat.com>

        PR c++/90548 - ICE with generic lambda and empty pack.
        * pt.c (tsubst_copy_and_build): Handle pack expansion properly.

2019-05-28  Nathan Sidwell  <nathan@acm.org>

        * cp-tree.h (make_anon_name): Drop declaration.
        (TYPE_UNNAMED_P): Use IDENTIFIER_ANON_P.
        * cp-lang.c (cxx_dwarf_name): Likewise.
        * class.c (find_flexarrays): Likewise.
        * decl.c (name_unnamed_type, xref_tag_1): Likewise.
        * error.c (dump_aggr_type): Likewise.
        * pt.c (push_template_decl_real): Likewise.
        * name-lookup.c (consider_binding_level): Likewise.
        (anon_cnt, make_anon_name): Delete.

2019-05-25  Marek Polacek  <polacek@redhat.com>

        PR c++/90572 - wrong disambiguation in friend declaration.
        * parser.c (cp_parser_constructor_declarator_p): Don't allow missing
        typename for friend declarations.

2019-05-23  Jonathan Wakely  <jwakely@redhat.com>

        * cp-tree.h (CP_AGGREGATE_TYPE_P): Fix whitespace.

        * init.c (std_placement_new_fn_p): Remove outdated TODO comment that
        was resolved by r254694.

2019-05-22  Jason Merrill  <jason@redhat.com>

        PR c++/20408 - unnecessary code for empty struct.
        * call.c (build_call_a): Use simple_empty_class_p.

        PR c++/86485 - -Wmaybe-unused with empty class ?:
        * cp-gimplify.c (simple_empty_class_p): Also true for MODIFY_EXPR.

2019-05-21  Paolo Carlini  <paolo.carlini@oracle.com>

        * parser.c (cp_parser_template_declaration_after_parameters): Use
        DECL_SOURCE_LOCATION in literal operator template errors.

2019-05-21  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/67184
        PR c++/69445
        * call.c (build_over_call): Devirtualize when the final overrider
        comes from the base.

2019-05-21  Nathan Sidwell  <nathan@acm.org>

        * name-lookup.c (do_nonmember_using_decl): Drop INSERT_P
        parameter.  Document.
        (finish_nonmember_using_decl): Adjust do_nonmember_using_decl
        calls.  Remove stray FIXME comment.

        * name-lookup.h (struct cp_binding_level): Drop usings field.
        (finish_namespace_using_decl, finish_local_using_decl): Replace with ...
        (finish_nonmember_using_decl): ... this.
        * name-lookup.c (push_using_decl_1, push_using_decl):
        (do_nonmember_using_decl): ... here.  Add INSERT_P arg.  Reimplement.
        (validate_nonmember_using_decl, finish_namespace_using_decl)
        (finish_local_using_decl): Replace with ...
        (finish_nonmember_using_decl): ... this.  Drop DECL parm.
        * parser.c (cp_parser_using_declaration): Don't do lookup here.
        * pt.c (tsubst_expr): Do not do using decl lookup here.

2019-05-21  Eric Botcazou  <ebotcazou@adacore.com>

        * decl2.c (cpp_check) <IS_ASSIGNMENT_OPERATOR>: New case.

2019-05-20  Marek Polacek  <polacek@redhat.com>

        CWG 2094 - volatile scalars are trivially copyable.
        PR c++/85679
        * tree.c (trivially_copyable_p): Don't check CP_TYPE_VOLATILE_P for
        scalar types.

2019-05-20  Marek Polacek  <polacek@redhat.com>

        * pt.c (convert_template_argument): Add a diagnostic for the
        [temp.arg]/2 ambiguity case.

        * name-lookup.c (finish_using_directive): Don't issue inform() if the
        warning didn't trigger.  Add quoting.  Tweak the inform message.

2019-05-20  Paolo Carlini  <paolo.carlini@oracle.com>

        * cp-tree.h: Remove remnants of CONV_NONCONVERTING.

2019-05-20  Nathan Sidwell  <nathan@acm.org>

        * name-lookup.c (finish_namespace_using_directive)
        (finish_local_using_directive): Merge to ...
        (finish_using_directive): ... here.  Handle both contexts.
        * name-lookup.h (finish_namespace_using_directive)
        (finish_local_using_directive): Replace with ...
        (finish_using_directive): ... this.
        * parser.c (cp_parser_using_directive): Adjust.
        * pt.c (tsubst_expr): Likewise.

        * cp-tree.h (struct lang_decl_ns): Remove usings field.
        (DECL_NAMESPACE_USING): Delete.
        * name-lookup.c (name_lookup::search_usings): Use namespace's
        binding scope.
        (name_lookup::queue_namespae): Likewise.
        (finish_namespace_using_directive, push_namespace): Likewise.
        (has_using_namespace_std_directive): Just search the entire
        binding stack.

2019-05-20  Jonathan Wakely  <jwakely@redhat.com>

        PR c++/90532 Ensure __is_constructible(T[]) is false
        * method.c (is_xible_helper): Return error_mark_node for construction
        of an array of unknown bound.

2019-05-17  Thomas Schwinge  <thomas@codesourcery.com>

        PR c++/89433
        * parser.c (cp_finalize_oacc_routine): Rework checking if already
        marked with an OpenACC 'routine' directive.

        PR c++/89433
        * parser.c (cp_parser_oacc_routine)
        (cp_parser_late_parsing_oacc_routine): Normalize order of clauses.
        (cp_finalize_oacc_routine): Call oacc_verify_routine_clauses.

        PR c++/89433
        * parser.c (cp_finalize_oacc_routine): Refer to OpenACC 'routine'
        clauses from "omp declare target" attribute.

2019-05-16  Martin Sebor  <msebor@redhat.com>

        * call.c (print_z_candidate): Wrap diagnostic text in a gettext
        macro.  Adjust.
        (print_z_candidates): Same.
        (build_conditional_expr_1): Quote keywords, operators, and types
        in diagnostics.
        (build_op_delete_call): Same.
        (maybe_print_user_conv_context): Wrap diagnostic text in a gettext
        macro.
        (convert_like_real): Same.
        (convert_arg_to_ellipsis): Quote keywords, operators, and types
        in diagnostics.
        (build_over_call): Same.
        (joust): Break up an overlong line.  Wrap diagnostic text in a gettext
        macro.
        * constexpr.c (cxx_eval_check_shift_p): Spell out >= in English.
        (cxx_eval_constant_expression): Quote keywords, operators, and types
        in diagnostics.
        (potential_constant_expression_1): Same.
        * cp-gimplify.c (cp_genericize_r): Same.
        * cvt.c (maybe_warn_nodiscard): Quote keywords, operators, and types
        in diagnostics.
        (type_promotes_to): Same.
        * decl.c (check_previous_goto_1): Same.
        (check_goto): Same.
        (start_decl): Same.
        (cp_finish_decl): Avoid parenthesizing a sentence for consistency.
        (grok_op_properties): Quote keywords, operators, and types
        in diagnostics.
        * decl2.c (grokfield): Same.
        (coerce_delete_type): Same.
        * except.c (is_admissible_throw_operand_or_catch_parameter): Same.
        * friend.c (do_friend): Quote C++ tokens.
        * init.c (build_new_1): Quote keywords, operators, and types
        in diagnostics.
        (build_vec_delete_1): Same.
        (build_delete): Same.
        * lex.c (parse_strconst_pragma): Same.
        (handle_pragma_implementation): Same.
        (unqualified_fn_lookup_error): Same.
        * mangle.c (write_type): Same.
        * method.c (defaulted_late_check): Avoid two consecutive punctuators.
        * name-lookup.c (cp_binding_level_debug): Remove a trailing newline.
        (pop_everything): Same.
        * parser.c (cp_lexer_start_debugging): Quote a macro name.
        in a diagnostic
        (cp_lexer_stop_debugging): Same.
        (cp_parser_userdef_numeric_literal): Quote a C++ header name
        in a diagnostic.
        (cp_parser_nested_name_specifier_opt): Quote keywords, operators,
        and types in diagnostics.
        (cp_parser_question_colon_clause): Same.
        (cp_parser_asm_definition): Same.
        (cp_parser_init_declarator): Same.
        (cp_parser_template_declaration_after_parameters): Avoid capitalizing
        a sentence in a diagnostic.
        (cp_parser_omp_declare_reduction): Quote keywords, operators, and types
        in diagnostics.
        (cp_parser_transaction): Same.
        * pt.c (maybe_process_partial_specialization): Replace second call
        to permerror with inform for consistency with other uses.
        (expand_integer_pack): Quote keywords, operators, and types
        in diagnostics.
        * rtti.c (get_typeid): Quote keywords, operators, and types
        in diagnostics.
        (build_dynamic_cast_1): Same.
        * semantics.c (finish_asm_stmt): Same.
        (finish_label_decl): Same.
        (finish_bases): Same.
        (finish_offsetof): Same.
        (cp_check_omp_declare_reduction): Same.
        (finish_decltype_type): Same.
        * tree.c (handle_init_priority_attribute): Same.  Add detail
        to diagnostics.
        (maybe_warn_zero_as_null_pointer_constant): Same.
        * typeck.c (cp_build_binary_op): Quote keywords, operators, and types
        in diagnostics.
        (cp_build_unary_op): Same.
        (check_for_casting_away_constness): Same.
        (build_static_cast): Same.
        (build_const_cast_1): Same.
        (maybe_warn_about_returning_address_of_local): Same.
        (check_return_expr): Same.
        * typeck2.c (abstract_virtuals_error_sfinae): Same.
        (digest_init_r): Replace a tab with spaces in a diagnostic.
        (build_functional_cast): Quote keywords, operators, and types
        in diagnostics.

2019-05-15  Jakub Jelinek  <jakub@redhat.com>

        PR debug/90197
        * cp-gimplify.c (genericize_cp_loop): Emit a DEBUG_BEGIN_STMT
        before the condition (or if missing or constant non-zero at the end
        of the loop.  Emit a DEBUG_BEGIN_STMT before the increment expression
        if any.  Don't call protected_set_expr_location on incr if it already
        has a location.

2019-05-15  Marek Polacek  <polacek@redhat.com>

        CWG 2096 - constraints on literal unions.
        * class.c (check_field_decls): Initialize booleans directly.  A union
        is literal if at least one of its non-static data members is of
        non-volatile literal type.

2019-05-15  Paolo Carlini  <paolo.carlini@oracle.com>

        * cp-tree.h (REFERENCE_VLA_OK): Remove.
        * lambda.c (build_capture_proxy): Remove use of the above.

2019-05-15  Paolo Carlini  <paolo.carlini@oracle.com>

        * call.c (perform_overload_resolution, build_new_method_call_1):
        Use OVL_P; remove redundant TEMPLATE_DECL checks.
        * decl.c (grokfndecl): Likewise.
        * mangle.c (write_expression): Likewise.
        * parser.c (cp_parser_template_id): Likewise.
        * pt.c (resolve_overloaded_unification, type_dependent_expression_p):
        Likewise.
        * search.c (build_baselink): Likewise.
        * tree.c (is_overloaded_fn, dependent_name, maybe_get_fns): Likewise.

2019-05-14  Paolo Carlini  <paolo.carlini@oracle.com>

        PR preprocessor/90382
        * decl.c (grokdeclarator): Fix value assigned to typespec_loc, use
        min_location.

2019-05-13  Jason Merrill  <jason@redhat.com>

        Use releasing_vec more broadly.
        * cp-tree.h (struct releasing_vec): Replace get_ref method with
        operator&.
        (vec_safe_push, vec_safe_reserve, vec_safe_length, vec_safe_splice):
        Forwarding functions for releasing_vec.
        (release_tree_vector): Declare but don't define.
        * call.c (build_op_delete_call, build_temp, call_copy_ctor)
        (perform_direct_initialization_if_possible): Use releasing_vec.
        * constexpr.c (cxx_eval_vec_init_1, cxx_eval_store_expression):
        Likewise.
        * cp-gimplify.c (cp_fold): Likewise.
        * cvt.c (force_rvalue, ocp_convert): Likewise.
        * decl.c (get_tuple_decomp_init): Likewise.
        * except.c (build_throw): Likewise.
        * init.c (perform_member_init, expand_default_init): Likewise.
        * method.c (do_build_copy_assign, locate_fn_flags): Likewise.
        * parser.c (cp_parser_userdef_char_literal)
        (cp_parser_userdef_numeric_literal)
        (cp_parser_userdef_string_literal)
        (cp_parser_perform_range_for_lookup)
        (cp_parser_range_for_member_function, cp_parser_omp_for_loop)
        (cp_parser_omp_for_loop_init): Likewise.
        * pt.c (tsubst_copy_and_build, do_class_deduction): Likewise.
        * semantics.c (calculate_direct_bases, calculate_bases)
        (finish_omp_barrier, finish_omp_flush, finish_omp_taskwait)
        (finish_omp_taskyield, finish_omp_cancel)
        (finish_omp_cancellation_point): Likewise.
        * tree.c (build_vec_init_elt, strip_typedefs, strip_typedefs_expr)
        (build_min_non_dep_op_overload): Likewise.
        * typeck.c (build_function_call_vec, cp_build_function_call_nary)
        (cp_build_modify_expr): Likewise.
        * typeck2.c (build_functional_cast): Likewise.

2019-05-11  Paolo Carlini  <paolo.carlini@oracle.com>

        * typeck.c (cp_build_function_call_vec): When mark_used fails
        unconditionally return error_mark_node.

2019-05-10  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokvardecl): Use an accurate location in error message
        about main as a global variable.

2019-05-10  Paolo Carlini  <paolo.carlini@oracle.com>

        * call.c (build_call_a): Use FUNC_OR_METHOD_TYPE_P.
        * cp-gimplify.c (cp_fold): Likewise.
        * cp-objcp-common.c (cp_type_dwarf_attribute): Likewise.
        * cp-tree.h (TYPE_OBJ_P, TYPE_PTROBV_P): Likewise.
        * cvt.c (perform_qualification_conversions): Likewise.
        * decl.c (grokdeclarator): Likewise.
        * decl2.c (build_memfn_type): Likewise.
        * mangle.c (canonicalize_for_substitution, write_type): Likewise.
        * parser.c (cp_parser_omp_declare_reduction): Likewise.
        * pt.c (check_explicit_specialization, uses_deducible_template_parms,
        check_cv_quals_for_unify, dependent_type_p_r): Likewise.
        * rtti.c (ptr_initializer): Likewise.
        * semantics.c (finish_asm_stmt, finish_offsetof,
        cp_check_omp_declare_reduction): Likewise.
        * tree.c (cp_build_qualified_type_real,
        cp_build_type_attribute_variant, cxx_type_hash_eq,
        cxx_copy_lang_qualifiers, cp_free_lang_data): Likewise.
        * typeck.c (structural_comptypes, convert_arguments,
        cp_build_addr_expr_1, unary_complex_lvalue, cp_build_c_cast,
        cp_build_modify_expr, comp_ptr_ttypes_real, type_memfn_rqual):
        Likewise.

2019-05-10  Marek Polacek  <polacek@redhat.com>

        PR c++/78010 - bogus -Wsuggest-override warning on final function.
        * class.c (check_for_override): Don't warn for final functions.

2019-05-10  Jakub Jelinek  <jakub@redhat.com>

        PR pch/90326
        * config-lang.in (gtfiles): Remove c-family/c-lex.c, add
        c-family/c-cppbuiltin.c.

2019-05-09  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/90382
        Revert:
        2018-04-26  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Fix value assigned to typespec_loc, use
        min_location.

2019-05-08  Nathan Sidwell  <nathan@acm.org>

        Kill DECL_SAVED_FUNCTION_DATA .
        * cp-tree.h (language_function): Remove x_auto_return_pattern.
        (current_function_auto_return_pattern): Delete.
        (lang_decl_fn): Replace saved_language_function with
        saved_auto_return type.
        (DECL_SAVED_FUNCTION_DATA): Delete.
        (DECL_SAVED_AUTO_RETURN_TYPE): New.
        (FNDECL_USED_AUTO): Correct documentation.
        * decl.c (duplicate_decls): Adjust AUTO return handling.
        (start_preparsed_function): Replace
        current_function_auto_return_pattern with
        DECL_SAVED_AUTO_RETURN_TYPE.  Remove DECL_SAVED_FUNCTION_DATA
        zapping.
        (finish_function): Likewise.
        (save_function_data): Delete.
        (fndecl_declared_return_type): Reimplement.
        * mangle.c (write_unqualified_name): Use DECL_SAVED_AUTO_RETURN_TYPE.
        * method.c (make_thunk, make_alias_for): Likewise.
        * parser.c (cp_parser_jump_statement): Likewise.
        * pt.c (do_auto_deduction): Likewise.
        * typeck.c (check_return_expr): Likewise.

2019-05-06  Jason Merrill  <jason@redhat.com>

        PR c++/90171 - reorganize usual_deallocation_fn_p
        * call.c (struct dealloc_info): New.
        (usual_deallocation_fn_p): Take a dealloc_info*.
        (aligned_deallocation_fn_p, sized_deallocation_fn_p): Remove.
        (build_op_delete_call): Adjust.

2019-05-07  Jason Merrill  <jason@redhat.com>

        PR c++/86485 - -Wmaybe-unused with empty class ?:
        * typeck.c (build_static_cast_1): Use cp_build_addr_expr.

        * pt.c (type_dependent_expression_p): A non-type template parm with
        a placeholder type is type-dependent.

2019-05-06  Marek Polacek  <polacek@redhat.com>

        PR c++/90265 - ICE with generic lambda.
        * pt.c (tsubst_copy_and_build): Use a dedicated variable for the last
        element in the vector.

2019-05-03  Martin Liska  <mliska@suse.cz>

        * call.c (build_aggr_conv): Use is_empty instead of
        elements () == 0 (and similar usages).
        * parser.c (cp_parser_lambda_introducer): Likewise.

2019-05-02  Nathan Sidwell  <nathan@acm.org>

        * semantics.c (finish_id_expression_1): Remove unreachable code.

2019-05-01  Nathan Sidwell  <nathan@acm.org>

        * name-lookup.h (get_class_binding_direct): Change final arg to
        bool.
        (get_class_binding): Likewise.
        * name-lookup.c (get_class_binding_direct): Replace TYPE_OR_FNS
        arg with WANT_TYPE bool.  Simplify.
        (get_class_binding): Adjust final arg.
        * decl.c (reshape_init_class): Adjust get_class_binding calls.

2019-04-30  Nathan Sidwell  <nathan@acm.org>

        * cp-objcp-common.c (cp_common_init_ts): Use MARK_TS_EXP for _EXPR
        nodes.  Call c_common_init_ts.

2019-04-29  Nathan Sidwell  <nathan@acm.org>

        * decl.c (duplicate_decls): Add whitespace, move comments into
        conditional blocks.
        * method.c (explain_implicit_non_constexpr): Refactor.
        * pt.c (check_explicit_specialization): Fix indentation.
        * semantics.c (process_outer_var_ref): Reformat.
        (finish_id_expression_1): Use STRIP_TEMPLATE.

2019-04-26  Jonathan Wakely  <jwakely@redhat.com>

        PR c++/90243 - orphaned note in uninstantiated constexpr function
        * decl.c (check_for_uninitialized_const_var): Suppress notes if no
        error was shown.

2019-04-26  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/90173
        * decl.c (grokdeclarator): Set type to error_mark_node
        upon error about template placeholder type non followed
        by a simple declarator-id.

2019-04-26  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Fix value assigned to typespec_loc, use
        min_location.

2019-04-24  Jason Merrill  <jason@redhat.com>

        PR c++/90227 - error with template parameter packs.
        * pt.c (coerce_template_parms): Do add empty pack when
        require_all_args.

2019-04-24  Richard Biener  <rguenther@suse.de>

        * call.c (null_ptr_cst_p): Order checks according to expensiveness.
        (conversion_null_warnings): Likewise.
        * typeck.c (same_type_ignoring_top_level_qualifiers_p): Return
        early if type1 == type2.

2019-04-22  Jason Merrill  <jason@redhat.com>

        PR c++/87366 - wrong error with alias template.
        * typeck.c (structural_comptypes): When comparing_specializations,
        aliases are unequal.
        (comptypes): When comparing_specializations, do structural
        comparison.

2019-04-19  Jason Merrill  <jason@redhat.com>

        PR c++/90190 - CTAD with list-constructor.
        * pt.c (do_class_deduction): Don't try the single element deduction
        if the single element is also a braced list.

        PR c++/90171 - ICE with destroying delete with size_t parm.
        * call.c (sized_deallocation_fn_p): New.  Use it instead of
        second_parm_is_size_t in most cases.
        (second_parm_is_size_t): Don't check for aligned.

2019-04-19  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/89900
        * pt.c (fn_type_unification): When handling null explicit
        arguments do not special case non-parameter packs.

2019-04-19  Jakub Jelinek  <jakub@redhat.com>

        PR c++/90138
        * pt.c (process_template_parm): Set decl to pushdecl result.  If
        !is_non_type, also set parm to that.

        PR c/89888
        * decl.c (struct cp_switch): Remove outside_range_p member.
        (push_switch): Don't clear it.
        (pop_switch): Adjust c_do_switch_warnings caller.
        (finish_case_label): Adjust c_add_case_label caller.

        PR c++/90108
        * decl.c (duplicate_decls): If remove is main variant and
        DECL_ORIGINAL_TYPE is some other type, remove a DECL_ORIGINAL_TYPE
        variant that has newdecl as TYPE_NAME if any.

2019-04-18  Jason Merrill  <jason@redhat.com>

        PR c++/87554 - ICE with extern template and reference member.
        * decl.c (cp_finish_decl): Don't set DECL_INITIAL of external vars.

2019-04-17  Jason Merrill  <jason@redhat.com>

        PR c++/90047 - ICE with enable_if alias template.
        * pt.c (tsubst_decl) [TYPE_DECL]: Don't put an erroneous decl in the
        hash table when we're in SFINAE context.

2019-04-17  Marek Polacek  <polacek@redhat.com>

        PR c++/90124 - bogus error with incomplete type in decltype.
        * typeck.c (build_class_member_access_expr): Check
        cp_unevaluated_operand.

2019-04-12  Jakub Jelinek  <jakub@redhat.com>

        PR c/89933
        * decl.c (duplicate_decls): When newdecl's type is its main variant,
        don't try to remove it from the variant list, but instead assert
        it has no variants.

2019-04-12  Martin Sebor  <msebor@redhat.com>

        PR c/88383
        PR c/89288
        * parser.c (cp_parser_has_attribute_expression): Handle assignment
        expressions.

2019-04-12  Jason Merrill  <jason@redhat.com>

        * call.c (null_member_pointer_value_p): Handle an empty CONSTRUCTOR
        of PMF type.

2019-04-12  Marek Polacek  <polacek@redhat.com>

        * except.c (build_noexcept_spec): Use build_converted_constant_bool_expr
        instead of perform_implicit_conversion_flags.

        PR c++/87603 - constexpr functions are no longer noexcept.
        * constexpr.c (is_sub_constant_expr): Remove unused function.
        * cp-tree.h (is_sub_constant_expr): Remove declaration.
        * except.c (check_noexcept_r): Don't consider a call to a constexpr
        function noexcept.

2019-04-11  Jakub Jelinek  <jakub@redhat.com>

        PR translation/90035
        * parser.h (struct cp_parser): Add
        type_definition_forbidden_message_arg member.
        * parser.c (cp_debug_parser): Print it.
        (cp_parser_check_type_definition): Pass
        parser->type_definition_forbidden_message_arg as second argument to
        error.
        (cp_parser_has_attribute_expression, cp_parser_sizeof_operand): Set
        parser->type_definition_forbidden_message_arg and use G_() with
        %qs for parser->type_definition_forbidden_message instead of
        building untranslatable message using concat.

2019-04-09  Jakub Jelinek  <jakub@redhat.com>

        PR translation/90011
        * typeck2.c (check_narrowing): Remove trailing space from diagnostics.

2019-04-08  Marek Polacek  <polacek@redhat.com>

        * typeck2.c (digest_init_r): Don't condition the object slicing warning
        on flag_checking.

2019-04-08  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/89914
        * semantics.c (trait_expr_value): Don't use TYPE_NOTHROW_P
        when maybe_instantiate_noexcept fails.
        (classtype_has_nothrow_assign_or_copy_p): Likewise.
        * method.c (implicitly_declare_fn): Avoid passing error_mark_node
        to build_exception_variant.

2019-04-05  Marek Polacek  <polacek@redhat.com>

        PR c++/87145 - bogus error converting class type in template arg list.
        * pt.c (convert_nontype_argument): Don't call
        build_converted_constant_expr if it could involve calling a conversion
        function with a instantiation-dependent constructor as its argument.

2019-04-05  Martin Sebor  <msebor@redhat.com>

        PR bootstrap/89980
        * decl.c (reshape_init_array_1): Avoid treating empty strings
        as zeros in array initializers.
        Use trivial_type_p () instead of TYPE_HAS_TRIVIAL_DFLT().

2019-04-04  Jason Merrill  <jason@redhat.com>

        PR c++/89948 - ICE with break in statement-expr.
        * constexpr.c (cxx_eval_statement_list): Jumping out of a
        statement-expr is non-constant.

2019-04-04  Jason Merrill  <jason@redhat.com>

        PR c++/89966 - error with non-type auto tparm.
        * pt.c (do_auto_deduction): Clear tf_partial.

2019-04-04  Jason Merrill  <jason@redhat.com>

        PR c++/86986 - ICE with TTP with parameter pack.
        * pt.c (coerce_template_parameter_pack): Only look at the type of a
        non-type parameter pack.
        (fixed_parameter_pack_p_1): Don't recurse into the type of a
        non-type parameter pack.
        (coerce_template_template_parms): Call add_outermost_template_args.

2019-04-04  Martin Sebor  <msebor@redhat.com>

        PR c++/89974
        PR c++/89878
        PR c++/89833
        PR c++/47488
        * decl.c (reshape_init_array_1): Strip trailing zero-initializers
        from arrays of trivial type and known size.
        * mangle.c (write_expression): Convert braced initializer lists
        to STRING_CSTs.
        (write_expression): Trim trailing zero-initializers from arrays
        of trivial type.
        (write_template_arg_literal): Mangle strings the same as braced
        initializer lists.

2019-04-03  Jason Merrill  <jason@redhat.com>

        PR c++/81866 - ICE with member template and default targ.
        * pt.c (tsubst_template_decl): Handle getting a type from
        retrieve_specialization.

        PR c++/86586 - -fcompare-debug=-Wsign-compare.
        * typeck.c (cp_build_binary_op): Don't fold for -Wsign-compare.

        PR c++/89331 - ICE with offsetof in incomplete class.
        * semantics.c (finish_offsetof): Handle error_mark_node.
        * typeck.c (build_class_member_access_expr): Call
        complete_type_or_maybe_complain before converting to base.

        PR c++/89917 - ICE with lambda in variadic mem-init.
        * pt.c (make_pack_expansion): Change type_pack_expansion_p to false.

2019-04-01  Jason Merrill  <jason@redhat.com>

        PR c++/86946 - ICE with function call in template argument.
        DR 1321
        * pt.c (iterative_hash_template_arg) [CALL_EXPR]: Use
        dependent_name.

2019-04-01  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/62207
        * pt.c (tsubst_copy): Deal with lookup_name not returing a variable.

2019-03-31  Marek Polacek  <polacek@redhat.com>

        PR c++/89852 - ICE with C++11 functional cast with { }.
        * constexpr.c (fold_non_dependent_expr_template): New static function
        broken out of...
        (fold_non_dependent_expr): ...here.
        (fold_non_dependent_init): New function.
        * cp-tree.h (fold_non_dependent_init): Declare.
        * typeck2.c (massage_init_elt): Call fold_non_dependent_init instead
        of fold_non_dependent_expr.  Don't call maybe_constant_init.

2019-03-30  Jason Merrill  <jason@redhat.com>

        PR c++/89744 - ICE with specialization of member class template.
        * pt.c (lookup_template_class_1): If the partial instantiation is
        explicitly specialized, adjust.
        (maybe_process_partial_specialization): Also adjust
        CLASSTYPE_TI_ARGS.

2019-03-29  Jakub Jelinek  <jakub@redhat.com>

        PR sanitizer/89869
        * typeck.c: Include gimplify.h.
        (cp_build_modify_expr) <case COND_EXPR>: Unshare rhs before using it
        for second time.  Formatting fixes.

2019-03-29  Marek Polacek  <polacek@redhat.com>

        PR c++/89876 - ICE with deprecated conversion.
        * call.c (convert_like_real): Only give warnings with tf_warning.

2019-03-28  Marek Polacek  <polacek@redhat.com>

        PR c++/89612 - ICE with member friend template with noexcept.
        * pt.c (maybe_instantiate_noexcept): For function templates, use their
        template result (function decl).  Don't set up local specializations.
        Temporarily turn on processing_template_decl.  Update the template type
        too.

        PR c++/89836 - bool constant expression and explicit conversions.
        * call.c (build_converted_constant_expr_internal): New function,
        renamed from...
        (build_converted_constant_expr): ...this.  New.
        (build_converted_constant_bool_expr): New.
        * cp-tree.h (build_converted_constant_bool_expr): Declare.
        * decl.c (build_explicit_specifier): Call
        build_converted_constant_bool_expr.

2019-03-28  Jakub Jelinek  <jakub@redhat.com>

        PR c++/89785
        * constexpr.c (struct check_for_return_continue_data): New type.
        (check_for_return_continue): New function.
        (potential_constant_expression_1) <case SWITCH_STMT>: Walk
        SWITCH_STMT_BODY to find RETURN_EXPRs or CONTINUE_STMTs not nested
        in loop bodies and set *jump_target to that if found.

2019-03-27  Jason Merrill  <jason@redhat.com>

        PR c++/89831 - error with qualified-id in const member function.
        * semantics.c (finish_non_static_data_member): Use object cv-quals
        in scoped case, too.

        PR c++/89421 - ICE with lambda in template parameter list.
        * parser.c (cp_parser_lambda_expression): Also reject a lambda in a
        template parameter list before C++20.
        * pt.c (type_dependent_expression_p): True for LAMBDA_EXPR.
        * semantics.c (begin_class_definition): Restore error about defining
        non-lambda class in template parm list.

2019-03-26  Jason Merrill  <jason@redhat.com>

        PR c++/86932 - missed SFINAE with empty pack.
        * pt.c (coerce_template_parms): Don't add an empty pack if
        tf_partial.
        (fn_type_unification): Pass tf_partial to coerce_template_parms.

        PR c++/86429 - constexpr variable in lambda.
        PR c++/82643
        PR c++/87327
        * constexpr.c (cxx_eval_constant_expression): In a lambda function,
        try evaluating the captured variable directly.

2019-03-26  Jakub Jelinek  <jakub@redhat.com>

        PR c++/89796
        * semantics.c (finish_omp_atomic): Add warning_sentinel for
        -Wunused-value around finish_expr_stmt call.

2019-03-25  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/84661
        PR c++/85013
        * parser.c (cp_parser_binary_expression): Don't call cp_fully_fold
        to undo the disabling of warnings.

2019-03-25  Jason Merrill  <jason@redhat.com>

        PR c++/87748 - substitution failure error with decltype.
        * pt.c (most_specialized_partial_spec): Clear
        processing_template_decl.

2019-03-25  Marek Polacek  <polacek@redhat.com>

        PR c++/89214 - ICE when initializing aggregates with bases.
        * typeck2.c (digest_init_r): Warn about object slicing instead of
        crashing.

        PR c++/89705 - ICE with reference binding with conversion function.
        * call.c (reference_binding): If the result of the conversion function
        is a prvalue of non-class type, use the cv-unqualified type.

2019-03-25  Nathan Sidwell  <nathan@acm.org>

        * lambda.c (maybe_add_lambda_conv_op): Don't add to comdat group.

2019-03-22  Jakub Jelinek  <jakub@redhat.com>

        PR c++/60702
        * cp-tree.h (get_tls_wrapper_fn): Remove declaration.
        (maybe_get_tls_wrapper_call): Declare.
        * decl2.c (get_tls_wrapper_fn): Make static.
        (maybe_get_tls_wrapper_call): New function.
        * typeck.c (build_class_member_access_expr): Handle accesses to TLS
        variables.
        * semantics.c (finish_qualified_id_expr): Likewise.
        (finish_id_expression_1): Use maybe_get_tls_wrapper_call.
        * pt.c (tsubst_copy_and_build): Likewise.

        PR c++/87481
        * constexpr.c (struct constexpr_ctx): Add constexpr_ops_count member.
        (cxx_eval_constant_expression): When not skipping, not constant class
        or location wrapper, increment *ctx->constexpr_ops_count and if it is
        above constexpr_loop_nest_limit, diagnose failure.
        (cxx_eval_outermost_constant_expr): Add constexpr_ops_count and
        initialize ctx.constexpr_ops_count to its address.
        (is_sub_constant_expr): Likewise.

2019-03-21  Jakub Jelinek  <jakub@redhat.com>

        PR c++/71446
        * call.c (filed_in_pset): Change pset from hash_set<tree> * to
        hash_set<tree, true> &, adjust uses accordingly.
        (build_aggr_conv): Change pset from hash_set<tree> *
        to hash_set<tree, true>.  Replace goto fail; with return NULL;,
        adjust pset uses.

        PR c++/89767
        * parser.c (cp_parser_lambda_introducer): Add ids and first_capture_id
        variables, check for duplicates in this function.
        * lambda.c (add_capture): Don't check for duplicates nor use
        IDENTIFIER_MARKED.
        (register_capture_members): Don't clear IDENTIFIER_MARKED here.

2019-03-21  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/89571
        * method.c (after_nsdmi_defaulted_late_checks): Avoid passing
        error_mark_node to comp_except_specs.

2019-03-20  Jason Merrill  <jason@redhat.com>

        PR c++/87480 - decltype of member access in default template arg
        * pt.c (type_unification_real): Accept a dependent result in
        template context.

2019-03-19  Martin Sebor  <msebor@redhat.com>

        PR tree-optimization/89688
        * typeck2.c (store_init_value): Call braced_lists_to_string for more
        kinds of initializers.

2019-03-18  Jason Merrill  <jason@redhat.com>

        PR c++/89630 - ICE with dependent using-decl as template arg.
        * tree.c (cp_tree_equal): Always return false for USING_DECL.

        PR c++/89761 - ICE with sizeof... in pack expansion.
        * pt.c (argument_pack_element_is_expansion_p): Handle
        ARGUMENT_PACK_SELECT.

        PR c++/89640 - GNU attributes on lambda.
        * parser.c (cp_parser_lambda_declarator_opt): Allow GNU attributes.

        PR c++/89682 - wrong access error in default argument.
        * pt.c (tsubst_default_argument): Don't defer access checks.

2019-03-18  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/85014
        * semantics.c (finish_non_static_data_member): Check return value
        of context_for_name_lookup and immediately return error_mark_node
        if isn't a type.

2019-03-17  Jason Merrill  <jason@redhat.com>

        PR c++/89571 - ICE with ill-formed noexcept on constructor.
        * pt.c (maybe_instantiate_noexcept): Only return false if defaulted.
        (regenerate_decl_from_template): Use it for noexcept-specs.

2019-03-14  Jason Merrill  <jason@redhat.com>

        * parser.c (cp_parser_decl_specifier_seq): Support C++20
        concept-definition syntax without 'bool'.

2019-03-14  Jakub Jelinek  <jakub@redhat.com>

        PR c++/89512
        * semantics.c (finish_qualified_id_expr): Reject variable templates.

        PR c++/89652
        * constexpr.c (struct constexpr_ctx): Change save_exprs type from
        hash_set<tree> to vec<tree>.
        (cxx_eval_call_expression): Adjust for save_exprs being a vec instead
        of hash_set.
        (cxx_eval_loop_expr): Likewise.  Truncate the vector after each
        removal of SAVE_EXPRs from values.
        (cxx_eval_constant_expression) <case SAVE_EXPR>: Call safe_push
        method on save_exprs instead of add.

2019-03-13  Jason Merrill  <jason@redhat.com>

        PR c++/86521 - C++17 copy elision in initialization by constructor.
        * call.c (joust_maybe_elide_copy): New.
        (joust): Call it.

2019-03-13  Marek Polacek  <polacek@redhat.com>

        PR c++/88979 - further P0634 fix for constructors.
        * parser.c (cp_parser_decl_specifier_seq): Pass flags to
        cp_parser_constructor_declarator_p.
        (cp_parser_direct_declarator): Allow missing typename for constructor
        parameters.
        (cp_parser_constructor_declarator_p): Add FLAGS parameter.  Pass it to
        cp_parser_type_specifier.

        PR c++/89686 - mixing init-capture and simple-capture in lambda.
        * parser.c (cp_parser_lambda_introducer): Give error when combining
        init-capture and simple-capture.

        PR c++/89660 - bogus error with -Wredundant-move.
        * typeck.c (maybe_warn_pessimizing_move): Only accept (T &) &arg
        as the std::move's argument.  Don't call convert_for_initialization
        when warn_redundant_move isn't on.

2019-03-11  Jason Merrill  <jason@redhat.com>

        PR c++/86521 - wrong overload resolution with ref-qualifiers.
        * call.c (build_user_type_conversion_1): Don't use a conversion to a
        reference of the wrong rvalueness for direct binding.

2019-03-11  Martin Liska  <mliska@suse.cz>

        * cvt.c (build_expr_type_conversion): Wrap apostrophes
        in gcc internal format with %'.
        * decl.c (check_no_redeclaration_friend_default_args): Likewise.
        (grokfndecl): Likewise.
        * name-lookup.c (do_pushtag): Likewise.
        * pt.c (unify_parameter_deduction_failure): Likewise.
        (unify_template_deduction_failure): Likewise.

2019-03-11  Martin Liska  <mliska@suse.cz>

        * call.c (convert_arg_to_ellipsis): Wrap an option name
        in a string format message and fix GNU coding style.
        (build_over_call): Likewise.
        * class.c (check_field_decl): Likewise.
        (layout_nonempty_base_or_field): Likewise.
        * constexpr.c (cxx_eval_loop_expr): Likewise.
        * cvt.c (type_promotes_to): Likewise.
        * decl.c (cxx_init_decl_processing): Likewise.
        (mark_inline_variable): Likewise.
        (grokdeclarator): Likewise.
        * decl2.c (record_mangling): Likewise.
        * error.c (maybe_warn_cpp0x): Likewise.
        * except.c (doing_eh): Likewise.
        * mangle.c (maybe_check_abi_tags): Likewise.
        * parser.c (cp_parser_diagnose_invalid_type_name): Likewise.
        (cp_parser_userdef_numeric_literal): Likewise.
        (cp_parser_primary_expression): Likewise.
        (cp_parser_unqualified_id): Likewise.
        (cp_parser_pseudo_destructor_name): Likewise.
        (cp_parser_builtin_offsetof): Likewise.
        (cp_parser_lambda_expression): Likewise.
        (cp_parser_lambda_introducer): Likewise.
        (cp_parser_lambda_declarator_opt): Likewise.
        (cp_parser_selection_statement): Likewise.
        (cp_parser_init_statement): Likewise.
        (cp_parser_decomposition_declaration): Likewise.
        (cp_parser_function_specifier_opt): Likewise.
        (cp_parser_static_assert): Likewise.
        (cp_parser_simple_type_specifier): Likewise.
        (cp_parser_namespace_definition): Likewise.
        (cp_parser_using_declaration): Likewise.
        (cp_parser_ctor_initializer_opt_and_function_body): Likewise.
        (cp_parser_initializer_list): Likewise.
        (cp_parser_type_parameter_key): Likewise.
        (cp_parser_member_declaration): Likewise.
        (cp_parser_try_block): Likewise.
        (cp_parser_std_attribute_spec): Likewise.
        (cp_parser_requires_clause_opt): Likewise.
        * pt.c (check_template_variable): Likewise.
        (check_default_tmpl_args): Likewise.
        (push_tinst_level_loc): Likewise.
        (instantiate_pending_templates): Likewise.
        (invalid_nontype_parm_type_p): Likewise.
        * repo.c (get_base_filename): Likewise.
        * rtti.c (typeid_ok_p): Likewise.
        (build_dynamic_cast_1): Likewise.
        * tree.c (maybe_warn_parm_abi): Likewise.

2019-03-08  Jakub Jelinek  <jakub@redhat.com>

        PR other/80058
        * parser.c (cp_parser_template_declaration_after_parameters): Avoid
        one space before " at the end of line and another after " on another
        line in a string literal.

        PR tree-optimization/89550
        * semantics.c (maybe_convert_cond): Only set TREE_NO_WARNING if
        warning_at returned true.
        * decl2.c (c_parse_final_cleanups): Likewise.
        * typeck.c (convert_for_assignment): Likewise.
        * decl.c (finish_function): Likewise.

        PR c++/89585
        * parser.c (cp_parser_asm_definition): Just warn instead of error
        on volatile qualifier outside of function body.

        PR c++/89599
        * constexpr.c (potential_constant_expression_1): Reject
        REINTERPRET_CAST_P NOP_EXPRs.

        PR c++/89622
        * call.c (joust): Call print_z_candidate only if pedwarn returned
        true.

2019-03-07  Jason Merrill  <jason@redhat.com>

        PR c++/88123 - lambda and using-directive.
        * name-lookup.c (op_unqualified_lookup)
        (maybe_save_operator_binding, discard_operator_bindings)
        (push_operator_bindings): New.
        * typeck.c (build_x_binary_op, build_x_unary_op): Call
        maybe_save_operator_binding.
        * decl.c (start_preparsed_function): Call push_operator_bindings.
        * tree.c (cp_free_lang_data): Call discard_operator_bindings.

        PR c++/88820 - ICE with CTAD and member template used in DMI.
        * pt.c (do_class_deduction): Handle parm used as its own arg.

2019-03-07  Jakub Jelinek  <jakub@redhat.com>

        PR c++/89585
        * parser.c (cp_parser_asm_definition): Parse asm qualifiers even
        at toplevel, but diagnose them.

2019-03-06  Jason Merrill  <jason@redhat.com>

        PR c++/89381 - implicit copy and using-declaration.
        * class.c (classtype_has_move_assign_or_move_ctor_p): Don't consider
        op= brought in by a using-declaration.

2019-03-06  Jakub Jelinek  <jakub@redhat.com>

        PR c++/87148
        * init.c (build_value_init_noctor): Ignore flexible array members.

2019-03-06  Jason Merrill  <jason@redhat.com>

        PR c++/89576 - if constexpr of lambda capture.
        * semantics.c (maybe_convert_cond): Do convert a non-dependent
        condition in a template.
        * typeck.c (condition_conversion): Handle being called in a
        template.

2019-03-06  Marek Polacek  <polacek@redhat.com>

        PR c++/87378 - bogus -Wredundant-move warning.
        * typeck.c (maybe_warn_pessimizing_move): See if the maybe-rvalue
        overload resolution would actually succeed.

2019-03-05  Jason Merrill  <jason@redhat.com>

        * class.c (is_really_empty_class): Add ignore_vptr parm.
        (trivial_default_constructor_is_constexpr): Pass it.
        * call.c (build_over_call): Pass it.
        * constexpr.c (cxx_eval_constant_expression): Pass it instead of
        checking TYPE_POLYMORPHIC_P.
        (cxx_eval_component_reference, potential_constant_expression_1):
        Pass it.
        * cp-gimplify.c (simple_empty_class_p): Pass it.
        * init.c (expand_aggr_init_1): Pass it.

2019-03-04  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/84605
        * parser.c (cp_parser_class_head): Reject TYPE_BEING_DEFINED too.

2019-03-04  Jakub Jelinek  <jakub@redhat.com>

        PR c++/71446
        * call.c (field_in_pset): New function.
        (build_aggr_conv): Handle CONSTRUCTOR_IS_DESIGNATED_INIT correctly.

2019-03-02  Jakub Jelinek  <jakub@redhat.com>

        PR c++/71446
        * cp-tree.h (CONSTRUCTOR_IS_DESIGNATED_INIT): Define.
        * parser.c (cp_parser_braced_list): Adjust cp_parser_initializer_list
        caller, set CONSTRUCTOR_IS_DESIGNATED_INIT.
        (cp_parser_initializer_list): Add designated parameter, set *designated
        to a bool whether any designators were parsed.
        * decl.c (reshape_init): Copy over CONSTRUCTOR_IS_DESIGNATED_INIT if
        needed.
        * pt.c (tsubst_copy_and_build): Likewise.
        * call.c (implicit_conversion): If CONSTRUCTOR_IS_DESIGNATED_INIT,
        don't call build_list_conv, nor build_complex_conv, nor attempt to
        convert a single element initializer to scalar.

2019-03-01  Marek Polacek  <polacek@redhat.com>

        PR c++/89537 - missing location for error with non-static member fn.
        * call.c (resolve_args): Use EXPR_LOCATION.
        * typeck.c (build_class_member_access_expr): Use input_location.

        PR c++/89532 - ICE with incomplete type in decltype.
        * semantics.c (finish_compound_literal): Return error_mark_node
        if digest_init_flags returns error_mark_node.

2019-03-01  Jakub Jelinek  <jakub@redhat.com>

        Implement P1002R1, Try-catch blocks in constexpr functions
        PR c++/89513
        * parser.c (cp_parser_ctor_initializer_opt_and_function_body):
        Diagnose constexpr ctor or function with function-try-block with
        pedwarn for c++17 and earlier.  Formatting fix.
        (cp_parser_try_block): Use pedwarn instead of error and only for
        c++17 and earlier when try block appears in constexpr function.
        * constexpr.c (build_constexpr_constructor_member_initializers):
        Handle TRY_BLOCK here instead of erroring on it.

2019-02-28  Jason Merrill  <jason@redhat.com>

        PR c++/88183 - ICE with .* fold-expression.
        * pt.c (fold_expression) [DOTSTAR_EXPR]: Remove special handling.

        PR c++/86969 - ICE with constexpr if and recursive generic lambdas.
        * class.c, lambda.c, pt.c: Revert earlier change.
        * lambda.c (add_capture): Don't special-case capture of dependent
        VLA.

        * name-lookup.c (print_binding_level): Print this_entity.

2019-02-27  Marek Polacek  <polacek@redhat.com>

        PR c++/88857 - ICE with value-initialization of argument in template.
        * call.c (convert_like_real): Don't call build_value_init in template.

2019-02-27  Jason Merrill  <jason@redhat.com>

        PR c++/86969 - ICE with constexpr if and recursive generic lambdas.
        * semantics.c (process_outer_var_ref): Do capture dependent vars.
        * class.c (finish_struct): Only add TAG_DEFN if T is in
        current_function_decl.
        * lambda.c (vla_capture_type): Force the capture type out into the
        lambda's enclosing function.
        (add_capture): Pass in the lambda.
        * pt.c (tsubst_lambda_expr): complete_type a VLA capture type.

2019-02-27  Marek Polacek  <polacek@redhat.com>

        PR c++/89511 - ICE with using-declaration and unscoped enumerator.
        * parser.c (cp_parser_using_declaration): For an unscoped enum
        only use its context if it's not a function declaration.

2019-02-27  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/89488
        * method.c (process_subob_fn): When maybe_instantiate_noexcept
        returns false don't call merge_exception_specifiers.

2019-02-27  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/88987
        * parser.c (cp_parser_noexcept_specification_opt): Return NULL_TREE
        for a non-constant parsed expression.

2019-02-26  Jakub Jelinek  <jakub@redhat.com>

        PR c++/89481
        * constexpr.c (cxx_eval_store_expression): When changing active union
        member, set no_zero_init.

2019-02-23  Marek Polacek  <polacek@redhat.com>

        PR c++/88294 - ICE with non-constant noexcept-specifier.
        * pt.c (maybe_instantiate_noexcept): Set up the list of local
        specializations.  Set current_class_{ptr,ref}.

2019-02-22  David Malcolm  <dmalcolm@redhat.com>

        PR c++/89390
        * parser.c (cp_parser_unqualified_id): Capture and use locations
        for destructors.

2019-02-22  Marek Polacek  <polacek@redhat.com>

        PR c++/89420 - ICE with CAST_EXPR in explicit-specifier.
        * decl.c (build_explicit_specifier): Don't check
        processing_template_decl.  Call instantiation_dependent_expression_p
        instead of value_dependent_expression_p.  Call
        instantiate_non_dependent_expr_sfinae before
        build_converted_constant_expr instead of calling
        instantiate_non_dependent_expr after it.  Add
        processing_template_decl_sentinel.

2019-02-22  Thomas Schwinge  <thomas@codesourcery.com>

        * parser.c (cp_parser_oacc_simple_clause): Remove parser formal
        parameter, move loc formal parameter to the front.  Adjust all
        users.
        (cp_parser_oacc_shape_clause): Add loc formal parameter.  Adjust
        all users.

2019-02-21  Jason Merrill  <jason@redhat.com>

        PR c++/87685 - generic lambda 'this' capture error.
        * lambda.c (lambda_expr_this_capture): Change add_capture_p to int.
        (maybe_generic_this_capture): Pass -1.

        PR c++/88394 - ICE with VLA init-capture.
        * lambda.c (is_normal_capture_proxy): Check DECL_CAPTURED_VARIABLE.

        PR c++/88869 - C++17 ICE with CTAD and explicit specialization.
        * pt.c (do_class_deduction): Don't include explicit specialization
        args in outer_args.

        PR c++/89422 - ICE with -g and lambda in default arg in template.
        * pt.c (tsubst_function_decl): SET_DECL_FRIEND_CONTEXT sooner.

2019-02-21  Jason Merrill  <jason@redhat.com>

        PR c++/88419 - C++17 ICE with class template arg deduction.
        * pt.c (make_template_placeholder): Set TYPE_CANONICAL after
        CLASS_PLACEHOLDER_TEMPLATE.

2019-02-21  Jakub Jelinek  <jakub@redhat.com>

        PR c++/89285
        * constexpr.c (struct constexpr_fundef): Add parms and result members.
        (retrieve_constexpr_fundef): Adjust for the above change.
        (register_constexpr_fundef): Save constexpr body with copy_fn,
        temporarily set DECL_CONTEXT on DECL_RESULT before that.
        (get_fundef_copy): Change FUN argument to FUNDEF with
        constexpr_fundef * type, grab body and parms/result out of
        constexpr_fundef struct and temporarily change it for copy_fn calls
        too.
        (cxx_eval_builtin_function_call): For __builtin_FUNCTION temporarily
        adjust current_function_decl from ctx->call context.  Test
        !potential_constant_expression instead of !is_constant_expression.
        (cxx_bind_parameters_in_call): Grab parameters from new_call.  Undo
        convert_for_arg_passing changes for TREE_ADDRESSABLE type passing.
        (cxx_eval_call_expression): Adjust get_fundef_copy caller.
        (cxx_eval_conditional_expression): For IF_STMT, allow then or else
        operands to be NULL.
        (label_matches): Handle BREAK_STMT and CONTINUE_STMT.
        (cxx_eval_loop_expr): Add support for FOR_STMT, WHILE_STMT and DO_STMT.
        (cxx_eval_switch_expr): Add support for SWITCH_STMT.
        (cxx_eval_constant_expression): Handle IF_STMT, FOR_STMT, WHILE_STMT,
        DO_STMT, CONTINUE_STMT, SWITCH_STMT, BREAK_STMT and CONTINUE_STMT.
        For SIZEOF_EXPR, recurse on the result of fold_sizeof_expr.  Ignore
        DECL_EXPR with USING_DECL operand.
        * lambda.c (maybe_add_lambda_conv_op): Build thisarg using
        build_int_cst to make it a valid constant expression.

2019-02-20  Jason Merrill  <jason@redhat.com>

        PR c++/88690 - C++17 ICE with empty base in aggregate.
        * typeck2.c (process_init_constructor_record): Skip trivial
        initialization of an empty base.

2019-02-21  Richard Biener  <rguenther@suse.de>

        PR middle-end/89392
        * vtable-class-hierarchy.c (vtv_generate_init_routine): Do not
        make symtab process new functions here.

2019-02-20  Jason Merrill  <jason@redhat.com>

        PR c++/87921 - wrong error with inline static data member.
        * decl2.c (finish_static_data_member_decl): Don't set DECL_IN_AGGR_P
        for a non-template inline variable.  Do nothing for an
        already-instantiated variable.
        (c_parse_final_cleanups): Check DECL_IN_AGGR_P without
        DECL_INLINE_VAR_P.
        * decl.c (check_initializer): Likewise.
        (make_rtl_for_nonlocal_decl): Likewise.
        * pt.c (instantiate_decl): Likewise.
        * typeck2.c (store_init_value): Likewise.

2019-02-20  Jakub Jelinek  <jakub@redhat.com>

        PR c++/89403
        * decl2.c (c_parse_final_cleanups): Move TREE_ASM_WRITTEN setting
        for flag_syntax_only from here...
        * semantics.c (expand_or_defer_fn_1): ... here.

        PR c++/89405
        * decl.c (maybe_commonize_var): When clearing TREE_PUBLIC and
        DECL_COMMON, set DECL_INTERFACE_KNOWN.

        PR c++/89336
        * constexpr.c (cxx_eval_store_expression): Diagnose changing of active
        union member for -std=c++17 and earlier.

2019-02-19  Jason Merrill  <jason@redhat.com>

        PR c++/87513 - 'sorry' mangling PMF template-id.
        * mangle.c (write_expression): Handle SCOPE_REF to BASELINK.

2019-02-19  Jason Merrill  <jason@redhat.com>

        PR c++/88380 - wrong-code with flexible array and NSDMI.
        * typeck2.c (process_init_constructor_record): Skip flexarrays.

2019-02-20  will wray  <wjwray@gmail.com>

        PR c++/88572 - wrong handling of braces on scalar init.
        * decl.c (reshape_init_r): Allow braces around scalar initializer
        within aggregate init.  Reject double braced-init of scalar
        variable.

2019-02-20  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/84536
        * pt.c (tsubst_init): Diagnose an initializer expanding to an
        empty list of expressions; tweak wrt dependent types.
        (regenerate_decl_from_template): For VAR_DECLs call tsubst_init
        instead of tsubst_expr.

2019-02-19  Jason Merrill  <jason@redhat.com>

        PR c++/88368 - wrong 'use of deleted function'
        * method.c (walk_field_subobs): Remember errors from get_nsdmi.
        (get_defaulted_eh_spec): Call push_tinst_level.
        * pt.c (maybe_instantiate_noexcept): Keep error_mark_node.
        * typeck2.c (merge_exception_specifiers): Handle error_mark_node.

2019-02-19  Chung-Lin Tang  <cltang@codesourcery.com>

        PR c/87924
        * parser.c (cp_parser_oacc_clause_wait): Add representation of wait
        clause without argument as 'wait (GOMP_ASYNC_NOVAL)', adjust comments.

2019-02-19  Jakub Jelinek  <jakub@redhat.com>

        PR c++/89387
        * lambda.c (maybe_generic_this_capture): Don't check
        DECL_NONSTATIC_MEMBER_FUNCTION_P on USING_DECLs.

        PR c++/89391
        * typeck.c (build_reinterpret_cast_1): Don't handle void to
        && conversion go through build_target_expr_with_type.

        PR c++/89390
        * error.c (qualified_name_lookup_error): Only call
        suggest_alternative_in_scoped_enum if name is IDENTIFIER_NODE.

2019-02-19  Tom Honermann  <tom@honermann.net>

        * name-lookup.c (get_std_name_hint): Added u8string as a name hint.

2019-02-18  Jason Merrill  <jason@redhat.com>

        PR c++/89336 - multiple stores in constexpr stmt.
        * constexpr.c (cxx_eval_store_expression): Preevaluate scalar or
        assigned value.

        * pt.c (check_explicit_specialization): If the declarator is a
        template-id, only check whether the arguments are dependent.

        Improve duplicate [[likely]] diagnostic.
        * parser.c (cp_parser_statement): Make attrs_loc a range.  Pass it
        to process_stmt_hotness_attribute.
        * cp-gimplify.c (process_stmt_hotness_attribute): Take attrs_loc.
        (genericize_if_stmt): Use likely/unlikely instead of predictor_name.

2019-02-17  Marek Polacek  <polacek@redhat.com>

        PR c++/89217 - ICE with list-initialization in range-based for loop.
        * constexpr.c (unshare_constructor): No longer static.
        * cp-tree.h (unshare_constructor): Declare.
        * semantics.c (finish_compound_literal): When dealing with a
        non-dependent expression in a template, return the original
        expression.  Pass LOOKUP_NO_NARROWING to digest_init_flags.

2019-02-13  Marek Polacek  <polacek@redhat.com>

        PR c++/89297 - ICE with OVERLOAD in template.
        * semantics.c (finish_compound_literal): Call
        instantiate_non_dependent_expr_sfinae.

2019-02-13  Alexandre Oliva  <aoliva@redhat.com>

        PR c++/86379
        * cp-tree.h (USING_DECL_SCOPE): Use result rather than type.
        * name-lookup.c (strip_using_decl): Use USING_DECL_SCOPE.
        * search.c (protected_accessible_p): Follow USING_DECL_DECLS.
        (shared_member_p): Likewise.
        (lookup_member): Likewise.
        * decl.c (grok_special_member_properties): Skip USING_DECLs.
        * semantics.c (finish_omp_declare_simd_methods): Likewise.
        (finish_qualified_id_expr): Do not call shared_member_p with
        a dependent expr.

        PR c++/87322
        * pt.c (tsubst_lambda_expr): Avoid duplicate tsubsting.
        Move cp_evaluated resetting before signature tsubsting.
        (gen_elem_of_pack_expansion_instantiation): Separate local
        specializations per index.

2019-02-13  David Malcolm  <dmalcolm@redhat.com>

        PR c++/89036
        * class.c (add_method): Drop destructor assertion.

2019-02-13  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/88986
        * decl.c (make_typename_type): Allow for TYPE_PACK_EXPANSION as
        context (the first argument).
        * pt.c (tsubst, case TYPENAME_TYPE): Handle TYPE_PACK_EXPANSION
        as context.

2019-02-12  Jason Merrill  <jason@redhat.com>

        PR c++/89144 - link error with constexpr initializer_list.
        * call.c (convert_like_real) [ck_list]: Don't allocate a temporary
        array for an empty list.
        * typeck2.c (store_init_value): Don't use cxx_constant_init in a
        template.

2019-02-11  Jason Merrill  <jason@redhat.com>

        PR c++/89241 - ICE with __func__ in lambda in template.
        * pt.c (enclosing_instantiation_of): Also check
        instantiated_lambda_fn_p for the template context.

2019-02-11  Marek Polacek  <polacek@redhat.com>

        PR c++/89212 - ICE converting nullptr to pointer-to-member-function.
        * pt.c (tsubst_copy_and_build) <case CONSTRUCTOR>: Return early for
        null member pointer value.

2019-02-11  Jakub Jelinek  <jakub@redhat.com>

        PR c++/88977
        * pt.c (convert_nontype_argument): Pass true as manifestly_const_eval
        to maybe_constant_value calls.

2019-02-11  Marek Polacek  <polacek@redhat.com>

        * typeck2.c (digest_init_r): Remove commented code.

2019-02-11  Martin Sebor  <msebor@redhat.com>

        PR c++/87996
        * decl.c (compute_array_index_type_loc): Preserve signed sizes
        for diagnostics.  Call valid_array_size_p instead of error.
        * init.c (build_new_1): Compute size for diagnostic.  Call
        invalid_array_size_error
        (build_new): Call valid_array_size_p instead of error.

2019-02-07  Alexandre Oliva  <aoliva@redhat.com>

        PR c++/86218
        * call.c (compare_ics): Deal with ck_aggr in either cs.

2019-02-06  David Malcolm  <dmalcolm@redhat.com>

        PR c++/71302
        * call.c (get_location_for_expr_unwinding_for_system_header): New
        function.
        (conversion_null_warnings): Use it when getting locations for
        EXPR, effectively adding a call to
        get_location_for_expr_unwinding_for_system_header for
        -Wconversion-null and making use of EXPR_LOCATION for
        -Wzero-as-null-pointer-constant.

2019-02-05  Jakub Jelinek  <jakub@redhat.com>

        PR c++/89187
        * optimize.c (maybe_thunk_body): Clear TREE_ADDRESSABLE on
        PARM_DECLs of the thunk.
        * lambda.c (maybe_add_lambda_conv_op): Likewise.

2019-02-05  Marek Polacek  <polacek@redhat.com>

        PR c++/89158 - by-value capture of constexpr variable broken.
        * call.c (convert_like_real) <case ck_user>: Call mark_exp_read
        instead of mark_rvalue_use.

2019-02-05  Alexandre Oliva  <aoliva@redhat.com>

        PR c++/87770
        * pt.c (instantiates_primary_template_p): New.
        (type_dependent_expression_p): Use it.

2019-02-01  Jason Merrill  <jason@redhat.com>

        PR c++/88761 - ICE with reference capture of constant.
        * lambda.c (mark_const_cap_r): Do walk subtrees of DECL_EXPR for
        non-proxy decls.

2019-02-01  Marek Polacek  <polacek@redhat.com>

        PR c++/88325 - ICE with invalid out-of-line template member definition.
        * parser.c (cp_parser_class_name): Don't call make_typename_type
        for overloads.

2019-02-01  Jakub Jelinek  <jakub@redhat.com>

        PR c++/87175
        * parser.c (cp_parser_gnu_attributes_opt): Set ok to false
        if require_open failed.

2019-01-31  Marek Polacek  <polacek@redhat.com>

        PR c++/89083, c++/80864 - ICE with list initialization in template.
        * constexpr.c (adjust_temp_type): Use copy_node and change the type
        instead of using build_constructor.
        * decl.c (reshape_init_r): Don't reshape a digested initializer.
        Return the initializer for COMPOUND_LITERAL_P.

        PR c++/88983 - ICE with switch in constexpr function.
        * constexpr.c (cxx_eval_switch_expr): Use SWITCH_COND and SWITCH_BODY.
        (cxx_eval_constant_expression) <case COND_EXPR>: Don't look for the
        label in the else branch if we found it in the then branch.

2019-01-30  Jason Merrill  <jason@redhat.com>

        PR c++/88752 - ICE with lambda and constexpr if.
        * cp-tree.h (LAMBDA_EXPR_INSTANTIATED): New.
        * pt.c (tsubst_lambda_expr): Set it.
        (instantiated_lambda_fn_p): Check it.
        (enclosing_instantiation_of): Use it.

2019-01-31  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/88170
        * cxx-pretty-print.c (pp_cxx_enumeration_constant): Print always as
        a C cast in pp_c_flag_gnu_v3 mode.

2019-01-30  Jakub Jelinek  <jakub@redhat.com>

        PR c++/88988
        * lambda.c (is_capture_proxy): Don't return true for
        DECL_OMP_PRIVATIZED_MEMBER artificial vars.

2019-01-30  Marek Polacek  <polacek@redhat.com>

        PR c++/89119 - ICE with value-initialization in template.
        * pt.c (tsubst_copy_and_build): Handle RANGE_EXPR.

2019-01-29  Jason Merrill  <jason@redhat.com>

        PR c++/86943 - wrong code converting lambda to function pointer.
        * lambda.c (maybe_add_lambda_conv_op): Use a template-id in the
        call.  Only forward parms for decltype.
        * pt.c (tsubst_copy_and_build) [CALL_EXPR]: Handle CALL_FROM_THUNK_P
        specially.
        * typeck.c (check_return_expr): Don't mess with a thunk call.

2019-01-28  Jason Merrill  <jason@redhat.com>

        PR c++/89089 - ICE with [[no_unique_address]].
        PR c++/88865 - wrong layout with [[no_unique_address]].
        * class.c (check_field_decls): A potentially-overlapping field makes
        the class non-layout-POD, but not non-empty.
        (end_of_class): Always consider empty data members.
        (layout_class_type): Set DECL_SIZE for empty fields.

2019-01-28  Marek Polacek  <polacek@redhat.com>

        PR c++/88358 - name wrongly treated as type.
        * parser.c (cp_parser_direct_declarator): Don't assume a qualified-id
        in parameter-list is a type if the function's declarator-id is not
        qualified.

2019-01-27  Marek Polacek  <polacek@redhat.com>

        PR c++/88815 - narrowing conversion lost in decltype.
        PR c++/78244 - narrowing conversion in template not detected.
        * cp-tree.h (CONSTRUCTOR_IS_DEPENDENT): New.
        * pt.c (instantiation_dependent_r): Consider a CONSTRUCTOR with
        CONSTRUCTOR_IS_DEPENDENT instantiation-dependent.
        * semantics.c (finish_compound_literal): When the compound literal
        isn't instantiation-dependent and the type isn't type-dependent,
        fall back to the normal processing.  Set CONSTRUCTOR_IS_DEPENDENT.

        PR c++/89024 - ICE with incomplete enum type.
        * call.c (standard_conversion): When converting an
        ARITHMETIC_TYPE_P to an incomplete type, return NULL.

2019-01-25  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/88969
        * call.c (build_op_delete_call): Implement 7.6.2.5/(10.1).
        * decl2.c (coerce_delete_type): Use build_pointer_type instead
        of TYPE_POINTER_TO.

2019-01-24  Jason Merrill  <jason@redhat.com>

        PR c++/89001 - mangling of reference temporaries
        * cp-tree.h (struct saved_scope): Add ref_temp_count.
        (current_ref_temp_count): New macro.
        * mangle.c (mangle_ref_init_variable): Use it.
        * typeck2.c (store_init_value): Clear it.
        * call.c (make_temporary_var_for_ref_to_temp): Copy public and
        comdat.

2019-01-24  Jakub Jelinek  <jakub@redhat.com>

        PR c++/88976
        * semantics.c (finish_omp_cancel): Diagnose more than one if
        on #pragma omp cancel with different modifiers.  Use
        maybe_convert_cond when not in template or build_x_binary_op
        otherwise.

2019-01-23  Marek Polacek  <polacek@redhat.com>

        PR c++/88757 - qualified name treated wrongly as type.
        * parser.c (cp_parser_direct_declarator): Don't treat qualified-ids
        in parameter-list as types if name lookup for declarator-id didn't
        find one or more function templates.

2019-01-23  Jakub Jelinek  <jakub@redhat.com>

        PR c/44715
        * cp-gimplify.c (genericize_cp_loop): Call begin_bc_block only
        after genericizing cond and incr expressions.

        PR c++/88984
        * cp-gimplify.c (genericize_switch_stmt): Move cond genericization
        before the begin_bc_block call.

2019-01-21  Jason Merrill  <jason@redhat.com>

        PR c++/87893 - constexpr ctor ICE on ARM.
        PR c++/88293 - ICE with comma expression.
        * constexpr.c (initialized_type): Don't shortcut non-void type.
        Handle COMPOUND_EXPR.
        (cxx_eval_outermost_constant_expr): Return early for void type.

2019-01-21  Jakub Jelinek  <jakub@redhat.com>

        PR c++/88949
        * optimize.c (cxx_copy_decl): New function.
        (clone_body): Use it instead of copy_decl_no_change.

        PR sanitizer/88901
        * typeck.c (cp_build_binary_op): Don't instrument
        SANITIZE_POINTER_COMPARE if processing_template_decl.
        (pointer_diff): Similarly for SANITIZE_POINTER_SUBTRACT.

2019-01-18  Jason Merrill  <jason@redhat.com>

        PR c++/88875 - error with explicit list constructor.
        * call.c (reference_binding): Don't modify EXPR.  Set
        need_temporary_p on the ck_user conversion for a temporary.
        (convert_like_real): Check it.

2019-01-18  H.J. Lu  <hongjiu.lu@intel.com>

        PR c/51628
        PR c/88664
        * call.c (convert_for_arg_passing): Upate the
        warn_for_address_or_pointer_of_packed_member call.
        * typeck.c (convert_for_assignment): Likewise.

2019-01-17  Jason Merrill  <jason@redhat.com>

        PR c++/86205 - ICE with ?: of throw and template-id.
        * pt.c (resolve_nondeduced_context_or_error): Split out from...
        * typeck.c (decay_conversion): ...here.
        * call.c (build_conditional_expr_1): Use it.

        PR c++/86740, ICE with constexpr if and nested generic lambdas.
        * tree.c (cp_walk_subtrees): Handle LAMBDA_EXPR.

2019-01-17  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Use typespec_loc in error messages
        about 'auto' and trailing return type.

2019-01-17  David Malcolm  <dmalcolm@redhat.com>

        PR c++/88699
        * class.c (add_method): Don't use DECL_DESTRUCTOR_P on
        USING_DECLs.

2019-01-17  Nathan Sidwell  <nathan@acm.org>

        PR c++/86610
        * semantics.c (process_outer_var_ref): Only skip dependent types
        in templates.

2019-01-17  Alexandre Oliva  <aoliva@redhat.com>

        PR c++/87768
        * cp-tree.h (saved_scope): Add suppress_location_wrappers.
        * name-lookup.c (do_push_to_top_level): Save and reset it.
        (do_pop_from_top_level): Restore it.

        PR c++/86648
        * pt.c (make_template_placeholder): Use auto_identifier.
        (is_auto): Drop CLASS_PLACEHOLDER_TEMPLATE test.
        * error.c (dump_type): Handle template placeholders.
        * cxx-pretty-print.c (pp_cx_unqualified_id): Likewise.

        PR c++/88146
        * cvt.c (convert_to_void): Handle all cdtor calls as if
        returning void.

2019-01-16  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Use locations[ds_storage_class] in
        error messages about ill-formed uses of mutable.

2019-01-16  Marek Polacek  <polacek@redhat.com>

        PR c++/78244 - narrowing conversion in template not detected.
        * call.c (perform_implicit_conversion_flags): Set
        IMPLICIT_CONV_EXPR_BRACED_INIT.
        * cp-tree.h (IMPLICIT_CONV_EXPR_BRACED_INIT): New.
        * pt.c (tsubst_copy_and_build): Use it.

2019-01-15  David Malcolm  <dmalcolm@redhat.com>

        PR c++/88795
        * pt.c (build_deduction_guide): Bail out if tsubst_arg_types
        fails.

2019-01-15  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (start_decl): Improve error location.
        * decl2.c (grokfield): Likewise.

2019-01-15  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Move further up the location_t loc
        declaration and use the location when building a TYPE_DECL for
        a typedef name.
        * decl2.c (grokbitfield): Use DECL_SOURCE_LOCATION in the error
        about an ill-formed bit-field as typedef.

2019-01-14  Marek Polacek  <polacek@redhat.com>

        PR c++/88830 - ICE with abstract class.
        * decl2.c (maybe_emit_vtables): Check CLASSTYPE_LAZY_DESTRUCTOR.
        Fix formatting.

        PR c++/88825 - ICE with bogus function return type deduction.
        * typeck.c (can_do_nrvo_p): Check error_mark_node.

2019-01-14  Tom Honermann  <tom@honermann.net>

        Implement P0482R5, char8_t: A type for UTF-8 characters and strings
        * cvt.c (type_promotes_to): Handle char8_t promotion.
        * decl.c (grokdeclarator): Handle invalid type specifier
        combinations involving char8_t.
        * lex.c (init_reswords): Add char8_t as a reserved word.
        * mangle.c (write_builtin_type): Add name mangling for char8_t (Du).
        * parser.c (cp_keyword_starts_decl_specifier_p)
        (cp_parser_simple_type_specifier): Recognize char8_t as a simple
        type specifier.
        (cp_parser_string_literal): Use char8_array_type_node for the type
        of CPP_UTF8STRING.
        (cp_parser_set_decl_spec_type): Tolerate char8_t typedefs in system
        headers.
        * rtti.c (emit_support_tinfos): type_info support for char8_t.
        * tree.c (char_type_p): Recognize char8_t as a character type.
        * typeck.c (string_conv_p): Handle conversions of u8 string
        literals of char8_t type.
        (check_literal_operator_args): Handle UDLs with u8 string literals
        of char8_t type.
        * typeck2.c (ordinary_char_type_p): New.
        (digest_init_r): Disallow initializing a char array with a u8 string
        literal.

2019-01-14  Martin Liska  <mliska@suse.cz>

        PR gcov-profile/88263
        * decl2.c (get_tls_wrapper_fn): Use DECL_SOURCE_LOCATION
        as location of the TLS wrapper.

2019-01-12  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (cp_finish_decl): Improve error location.
        * decl2.c (grokfield): Likewise, improve two locations.

2019-01-11  Marek Polacek  <polacek@redhat.com>

        PR c++/88692, c++/87882 - -Wredundant-move false positive with *this.
        * typeck.c (maybe_warn_pessimizing_move): Return if ARG isn't
        ADDR_EXPR.

2019-01-11  Jason Merrill  <jason@redhat.com>

        PR c++/88312 - pack expansion of decltype.
        * pt.c (instantiation_dependent_r): A template non-type parameter
        pack is instantiation-dependent.

2019-01-11  Jason Merrill  <jason@redhat.com>

        PR c++/88613 - ICE with use of const var in lambda.
        * expr.c (mark_use): Fix location wrapper handling.
        * cp-gimplify.c (cp_fold_maybe_rvalue): Call mark_rvalue_use.

2019-01-11  Tobias Burnus  <burnus@net-b.de>

        PR C++/88114
        * decl2.c (maybe_emit_vtables): If needed, generate code for
        the destructor of an abstract class.
        (mark_used): Update comment for older function-name change.

2019-01-11  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (start_decl): Improve error location.
        (grokdeclarator): Likewise, improve two locations.

2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>

        PR other/16615

        * cp-tree.h: Mechanically replace "can not" with "cannot".
        * parser.c: Likewise.
        * pt.c: Likewise.

2019-01-08  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grok_reference_init): Improve error location.
        (grokdeclarator): Likewise, improve two locations.

2019-01-08  Marek Polacek  <polacek@redhat.com>

        PR c++/88538 - braced-init-list in template-argument-list.
        * parser.c (cp_parser_template_argument): Handle braced-init-list when
        in C++20.

        PR c++/88548 - this accepted in static member functions.
        * parser.c (cp_debug_parser): Adjust printing of
        local_variables_forbidden_p.
        (cp_parser_new): Set local_variables_forbidden_p to 0 rather than false.
        (cp_parser_primary_expression): When checking
        local_variables_forbidden_p, use THIS_FORBIDDEN or
        LOCAL_VARS_FORBIDDEN.
        (cp_parser_lambda_body): Update the type of
        local_variables_forbidden_p.  Set it to 0 rather than false.
        (cp_parser_condition): Adjust call to cp_parser_declarator.
        (cp_parser_explicit_instantiation): Likewise.
        (cp_parser_init_declarator): Likewise.
        (cp_parser_declarator): New parameter.  Use it.
        (cp_parser_direct_declarator): New parameter.  Use it to set
        local_variables_forbidden_p.  Adjust call to cp_parser_declarator.
        (cp_parser_type_id_1): Adjust call to cp_parser_declarator.
        (cp_parser_parameter_declaration): Likewise.
        (cp_parser_default_argument): Update the type of
        local_variables_forbidden_p.  Set it to LOCAL_VARS_AND_THIS_FORBIDDEN
        rather than true.
        (cp_parser_member_declaration): Tell cp_parser_declarator if we saw
        'static' or 'friend'.
        (cp_parser_exception_declaration): Adjust call to cp_parser_declarator.
        (cp_parser_late_parsing_default_args): Update the type of
        local_variables_forbidden_p.  Set it to LOCAL_VARS_AND_THIS_FORBIDDEN
        rather than true.
        (cp_parser_cache_defarg): Adjust call to cp_parser_declarator.
        (cp_parser_objc_class_ivars): Likewise.
        (cp_parser_objc_struct_declaration): Likewise.
        (cp_parser_omp_for_loop_init): Likewise.
        * parser.h (cp_parser): Change the type of local_variables_forbidden_p
        to unsigned char.
        (LOCAL_VARS_FORBIDDEN, LOCAL_VARS_AND_THIS_FORBIDDEN, THIS_FORBIDDEN):
        Define.

2019-01-08  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (start_decl): Improve permerror location.

2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
            Jakub Jelinek  <jakub@redhat.com>

        PR c++/88554
        * decl.c (finish_function): For -Wreturn-type don't add a return *this;
        fixit hint if current_class_ref is NULL.  Use a single if instead of
        two nested ones.

2019-01-07  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (start_decl): Improve two error_at locations.
        (expand_static_init): Likewise.

2019-01-07  Marek Polacek  <polacek@redhat.com>

        PR c++/88741 - wrong error with initializer-string.
        * decl.c (cp_complete_array_type): Strip any location wrappers.

2019-01-07  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR c++/88261
        PR c++/69338
        PR c++/69696
        PR c++/69697
        * cp-tree.h (LOOKUP_ALLOW_FLEXARRAY_INIT): New flag value.
        * typeck2.c (digest_init_r): Raise an error for non-static
        initialization of a flexible array member.
        (process_init_constructor, massage_init_elt,
        process_init_constructor_array, process_init_constructor_record,
        process_init_constructor_union, process_init_constructor): Add the
        flags parameter and pass it thru.
        (store_init_value): Pass LOOKUP_ALLOW_FLEXARRAY_INIT parameter to
        digest_init_flags for static decls.

2019-01-07  Jakub Jelinek  <jakub@redhat.com>

        PR c++/85052
        * cp-tree.h (cp_build_vec_convert): Declare.
        * parser.c (cp_parser_postfix_expression): Parse
        __builtin_convertvector.
        * constexpr.c: Include fold-const-call.h.
        (cxx_eval_internal_function): Handle IFN_VEC_CONVERT.
        (potential_constant_expression_1): Likewise.
        * semantics.c (cp_build_vec_convert): New function.
        * pt.c (tsubst_copy_and_build): Handle CALL_EXPR to
        IFN_VEC_CONVERT.

2019-01-03  Jakub Jelinek  <jakub@redhat.com>

        PR c++/88636
        * decl.c (builtin_function_1): Return result of pushdecl_top_level
        or pushdecl rather than decl.

2019-01-03  Paolo Carlini  <paolo.carlini@oracle.com>

        * tree.c (handle_nodiscard_attribute): Improve warning location.

2019-01-02  Marek Polacek  <polacek@redhat.com>

        PR c++/88612 - ICE with -Waddress-of-packed-member.
        * call.c (convert_for_arg_passing): Only give warnings with tf_warning.
        * typeck.c (convert_for_assignment): Likewise.

        PR c++/88631 - CTAD failing for value-initialization.
        * typeck2.c (build_functional_cast): Try deducing the template
        arguments even if there are no arguments to deduce from.

2019-01-01  Jakub Jelinek  <jakub@redhat.com>

        Update copyright years.
\f
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