c++: Fix CTAD with multiple-arg ctor template [93248].

[gcc.git] / gcc / cp / ChangeLog

2020-03-14  Jason Merrill  <jason@redhat.com>

        PR c++/93248
        * pt.c (build_deduction_guide): Clear cp_unevaluated_operand for
        substituting DECL_ARGUMENTS.

2020-03-14  Jakub Jelinek  <jakub@redhat.com>

        * logic.cc (formula::formula): Change "a an" to "an" in a comment.
        * parser.c (cp_debug_parser): Change "a an" to "an" in a string
        literal.

2020-03-13  Patrick Palka  <ppalka@redhat.com>

        PR c++/67960
        * call.c (build_over_call): Use a warning_sentinel to disable
        warn_deprecated_decl before calling build_addr_func.

2020-03-12  Jakub Jelinek  <jakub@redhat.com>

        PR c++/94124
        * decl.c (reshape_init_array_1): Don't unshare constructor if there
        aren't any trailing zero elts, otherwise only unshare the first
        nelts.

2020-03-11  Jason Merrill  <jason@redhat.com>

        PR c++/93907
        * constraint.cc (tsubst_parameter_mapping): Canonicalize type
        argument.

2020-03-11  Marek Polacek  <polacek@redhat.com>
            Jason Merrill  <jason@redhat.com>

        PR c++/94074 - wrong modifying const object error for COMPONENT_REF.
        * constexpr.c (cref_has_const_field): New function.
        (modifying_const_object_p): Consider a COMPONENT_REF
        const only if any of its fields are const.
        (cxx_eval_store_expression): Mark a CONSTRUCTOR of a const type
        as readonly after its initialization has been done.

2020-03-10  Marek Polacek  <polacek@redhat.com>

        PR c++/94124 - wrong conversion error with non-viable overload.
        * decl.c (reshape_init_array_1): Unshare a constructor if we
        stripped trailing zero-initializers.

2020-03-10  Jason Merrill  <jason@redhat.com>

        PR c++/93901
        * pt.c (maybe_instantiate_noexcept): Always update clones.

2020-03-10  Jason Merrill  <jason@redhat.com>

        PR c++/93596
        * pt.c (maybe_aggr_guide): Check BRACE_ENCLOSED_INITIALIZER_P.

2020-03-10  Jason Merrill  <jason@redhat.com>

        PR c++/93922
        PR c++/94041
        PR c++/52320
        PR c++/66139
        * cp-gimplify.c (cp_gimplify_init_expr): Partially revert patch for
        66139: Don't split_nonconstant_init.  Remove pre_p parameter.

2020-03-09  Marek Polacek  <polacek@redhat.com>

        PR c++/92031 - bogus taking address of rvalue error.
        PR c++/91465 - ICE with template codes in check_narrowing.
        PR c++/93870 - wrong error when converting template non-type arg.
        PR c++/94068 - ICE with template codes in check_narrowing.
        * call.c (convert_like_real): Return IMPLICIT_CONV_EXPR
        in a template when not ck_identity and we're dealing with a class.
        (convert_like_real) <case ck_ref_bind>: Return IMPLICIT_CONV_EXPR
        in a template if we need a temporary.
        * decl.c (compute_array_index_type_loc): Remove
        instantiate_non_dependent_expr_sfinae call.  Call
        fold_non_dependent_expr instead of maybe_constant_value.
        (build_explicit_specifier): Don't instantiate or create a sentinel
        before converting the expression.
        * except.c (build_noexcept_spec): Likewise.
        * pt.c (convert_nontype_argument): Don't build IMPLICIT_CONV_EXPR.
        Set IMPLICIT_CONV_EXPR_NONTYPE_ARG if that's what
        build_converted_constant_expr returned.
        * typeck2.c (check_narrowing): Call fold_non_dependent_expr instead
        of maybe_constant_value.

2020-03-09  Jakub Jelinek  <jakub@redhat.com>

        PR c++/94067
        Revert
        2019-10-11  Paolo Carlini  <paolo.carlini@oracle.com>

        * constexpr.c (cxx_eval_constant_expression): Do not handle
        RROTATE_EXPR and LROTATE_EXPR.

2020-03-09  Marek Polacek  <polacek@redhat.com>

        PR c++/94050 - ABI issue with alignas on armv7hl.
        * class.c (layout_class_type): Don't replace a class's
        CLASSTYPE_AS_BASE if their TYPE_USER_ALIGN don't match.

2020-03-09  Bin Cheng  <bin.cheng@linux.alibaba.com>

        * coroutines.cc (build_actor_fn): Factor out code inserting the
        default return_void call to...
        (morph_fn_to_coro): ...here, also hoist local var declarations.

2020-03-08  Patrick Palka  <ppalka@redhat.com>

        PR c++/93729
        * call.c (convert_like_real): Check complain before emitting an error
        about binding a bit-field to a reference.

        * cxx-pretty-print.c (cxx_pretty_printer::simple_type_specifier)
        [TYPENAME_TYPE]: Print the TYPENAME_TYPE_FULLNAME instead of the
        TYPE_NAME.

2020-03-06  Nathan Sidwell  <nathan@acm.org>

        PR c++/94027
        * mangle.c (find_substitution): Don't call same_type_p on template
        args that cannot match.

2020-03-04  Martin Sebor  <msebor@redhat.com>

        PR c++/90938
        * tree.c (type_initializer_zero_p): Fail for structs initialized
        with non-structs.

2020-03-04  Jason Merrill  <jason@redhat.com>

        PR c++/90432
        * init.c (perform_member_init): Don't do aggregate initialization of
        empty field.
        * constexpr.c (cx_check_missing_mem_inits): Don't enforce
        initialization of empty field.

2020-03-04  Martin Liska  <mliska@suse.cz>

        * method.c: Wrap array in ctor with braces in order
        to silent clang warnings.

2020-03-03  Jason Merrill  <jason@redhat.com>
            Marek Polacek  <polacek@redhat.com>

        PR c++/90505 - mismatch in template argument deduction.
        * pt.c (tsubst): Don't reduce the template level of template
        parameters when tf_partial.

2020-03-03  Jakub Jelinek  <jakub@redhat.com>

        PR c++/93998
        * constexpr.c (cxx_eval_constant_expression)
        <case TARGET_EXPR, case SAVE_EXPR>: Don't record anything if
        *non_constant_p is true.

2020-03-03  Jun Ma  <JunMa@linux.alibaba.com>

        * coroutines.cc (captures_temporary): Strip component_ref
        to its base object.

2020-03-03  Jun Ma <JunMa@linux.alibaba.com>

        * coroutines.cc (finish_co_await_expr): Build co_await_expr
        with unknown_type_node.
        (finish_co_yield_expr): Ditto.
        *pt.c (type_dependent_expression_p): Set co_await/yield_expr
        with unknown type as dependent.

2020-03-02  Iain Sandoe  <iain@sandoe.co.uk>

        * coroutines.cc (struct local_var_info): Adjust to remove the
        reference to the captured var, and just to note that this is a
        lambda capture proxy.
        (transform_local_var_uses): Handle lambda captures specially.
        (struct param_frame_data): Add a visited set.
        (register_param_uses): Also check for param uses in lambda
        capture proxies.
        (struct local_vars_frame_data): Remove captures list.
        (register_local_var_uses): Handle lambda capture proxies by
        noting and bypassing them.
        (morph_fn_to_coro): Update to remove lifetime extension of
        lambda capture-by-copy vars.

2020-03-02  Iain Sandoe  <iain@sandoe.co.uk>

        * coroutines.cc (build_co_await): Do not build frame
        awaitable proxy vars when the co_await expression is
        a function parameter or local var.
        (co_await_expander): Do not initialise a frame var with
        itself.
        (transform_await_expr): Only substitute the awaitable
        frame var if it's needed.
        (register_awaits): Do not make frame copies for param
        or local vars that are awaitables.

2020-02-28  Jason Merrill  <jason@redhat.com>

        Implement P2092R0, Disambiguating Nested-Requirements
        * parser.c (cp_parser_requirement_parameter_list): Pass
        CP_PARSER_FLAGS_TYPENAME_OPTIONAL.

        * call.c (build_user_type_conversion_1): Don't look at the second
        conversion of a non-viable candidate.

2020-02-28  Jakub Jelinek  <jakub@redhat.com>

        P1937R2 - Fixing inconsistencies between const{expr,eval} functions
        * typeck.c (cp_build_addr_expr_1): Allow taking address of immediate
        functions in unevaluated contexts.

2020-02-27  Nathan Sidwell  <nathan@acm.org>

        PR c++/93933
        * pt.c (template_args_equal): Pass ARGUMENT_PACKS through to
        cp_tree_equal.
        * tree.c (cp_tree_equal): Compare ARGUMENT_PACKS here,
        * typeck.c (comptypes): Assert we don't get any argument packs.

        * class.c (adjust_clone_args): Correct arg-checking assert.
        * typeck.c (comptypes): Assert not nulls.

2020-02-26  Marek Polacek  <polacek@redhat.com>

        PR c++/93789 - ICE with invalid array bounds.
        * decl.c (compute_array_index_type_loc): Don't use the folded
        size when folding cleared TREE_CONSTANT.

2020-02-26  Iain Sandoe  <iain@sandoe.co.uk>

        * class.c (classtype_has_non_deleted_copy_ctor): New.
        * coroutines.cc (struct param_info): Keep track of params
        that are references, and cache the original type and whether
        the DTOR is trivial.
        (build_actor_fn): Handle param copies always, and adjust the
        handling for references.
        (register_param_uses): Only handle uses here.
        (classtype_has_non_deleted_copy_ctor): New.
        (morph_fn_to_coro): Adjust param copy handling to match n4849
        by reordering ahead of the promise CTOR and always making a
        frame copy, even if the param is unused in the coroutine body.
        * cp-tree.h (classtype_has_non_deleted_copy_ctor): New.

2020-02-26  Patrick Palka  <ppalka@redhat.com>

        * constraint.cc (finish_constraint_binary_op): Set expr's location range
        to the range of its operands.
        (satisfy_atom): Pass MAP instead of ARGS to diagnose_atomic_constraint.
        (diagnose_trait_expr): Take the instantiated parameter mapping MAP
        instead of the corresponding template arguments ARGS and adjust body
        accordingly.
        (diagnose_requires_expr): Likewise.
        (diagnose_atomic_constraint): Likewise.  When printing an atomic
        constraint expression, print the instantiated parameter mapping
        alongside it.
        * cxx-pretty-print.cc (cxx_pretty_printer::expression)
        [NONTYPE_ARGUMENT_PACK]: Print braces around a NONTYPE_ARGUMENT_PACK.
        (cxx_pretty_printer::type_id): Handle TYPE_ARGUMENT_PACK.

2020-02-26  Marek Polacek  <polacek@redhat.com>

        PR c++/93676 - value-init crash in template.
        * init.c (build_new_1): Don't call build_vec_init in a template.

2020-02-26  Marek Polacek  <polacek@redhat.com>

        PR c++/93862 - ICE with static_cast when converting from int[].
        * call.c (reference_compatible_p): No longer static.
        * cp-tree.h (reference_compatible_p): Declare.
        * typeck.c (build_static_cast_1): Use reference_compatible_p instead
        of reference_related_p.

2020-02-26  Marek Polacek  <polacek@redhat.com>

        PR c++/93803 - ICE with constexpr init and [[no_unique_address]].
        * constexpr.c (reduced_constant_expression_p): Don't crash on a null
        field.

2020-02-24  Martin Sebor  <msebor@redhat.com>

        PR c++/93804
        * parser.c (cp_parser_check_class_key): Avoid issuing -Wredundant-tags
        in shared C/C++ code in headers.
        Remove a duplicate hunk of code.

2020-02-24  Marek Polacek  <polacek@redhat.com>

        PR c++/93869 - ICE with -Wmismatched-tags.
        * parser.c (cp_parser_check_class_key): Check class_key earlier.

2020-02-24  Marek Polacek  <polacek@redhat.com>

        PR c++/93712 - ICE with ill-formed array list-initialization.
        * call.c (next_conversion): Return NULL for ck_aggr.
        (build_aggr_conv): Set u.expr instead of u.next.
        (build_array_conv): Likewise.
        (build_complex_conv): Likewise.
        (conv_get_original_expr): Handle ck_aggr.

2020-02-24  Jakub Jelinek  <jakub@redhat.com>

        P1937R2 - Fixing inconsistencies between const{expr,eval} functions
        * call.c (build_over_call): Don't evaluate immediate functions in
        unevaluated operands.

2020-02-24  Jason Merrill  <jason@redhat.com>

        P0780R2: Resolve lambda init-capture pack grammar.
        * parser.c (cp_parser_lambda_introducer): Expect &...x=y rather than
        ...&x=y.

2020-02-22  Marek Polacek  <polacek@redhat.com>

        PR c++/93882
        * decl.c (grokdeclarator): Use %qs in a diagnostic message.

2020-02-21  Martin Sebor  <msebor@redhat.com>

        PR gcov-profile/93753
        * class.c (check_flexarrays): Tighten up a test for potential members
        of anonymous structs or unions.

2020-02-20  Martin Sebor  <msebor@redhat.com>

        PR c++/93801
        * parser.c (cp_parser_check_class_key): Only handle true C++ class-keys.

2020-02-20  Martin Liska  <mliska@suse.cz>

        PR translation/93841
        * config/or1k/or1k.opt: Remove superfluous word.
        * doc/invoke.texi: Likewise.

2020-02-20  Martin Liska  <mliska@suse.cz>

        PR translation/93838
        * parser.c (cp_parser_decl_specifier_seq): Remove trailing space.

2020-02-19  Marek Polacek  <polacek@redhat.com>

        PR c++/93169 - wrong-code with a non-constexpr constructor.
        * constexpr.c (cxx_eval_call_expression): Only set TREE_READONLY
        on constant CONSTRUCTORs.

2020-02-15  Marek Polacek  <polacek@redhat.com>

        PR c++/93710 - poor diagnostic for array initializer.
        * call.c (build_user_type_conversion_1): Use cp_expr_loc_or_input_loc
        for an error call.

2020-02-15  Jason Merrill  <jason@redhat.com>

        PR c++/92556
        * pt.c (any_template_parm_r): Look into lambda body.

        PR c++/92583
        * pt.c (any_template_parm_r): Remove CONSTRUCTOR handling.

2020-02-14  Jakub Jelinek  <jakub@redhat.com>

        PR c++/61414
        * class.c (enum_min_precision): Change prec type from int to int &.

        PR libstdc++/92906
        * cp-tree.h (enum cp_tree_index): Add CPTI_FALLBACK_DFLOAT32_TYPE,
        CPTI_FALLBACK_DFLOAT64_TYPE and CPTI_FALLBACK_DFLOAT128_TYPE.
        (fallback_dfloat32_type, fallback_dfloat64_type,
        fallback_dfloat128_type): Define.
        * mangle.c (write_builtin_type): Handle fallback_dfloat*_type like
        dfloat*_type_node.
        * rtti.c (emit_support_tinfos): Emit DFP typeinfos even when dfp
        is disabled for compatibility.

2020-02-13  Jason Merrill  <jason@redhat.com>

        PR c++/93713
        * name-lookup.c (matching_fn_p): A function does not match a
        template.

        PR c++/93643
        PR c++/91476
        * tree.c (decl_linkage): Always lk_none for locals.

2020-02-12  Jason Merrill  <jason@redhat.com>

        PR c++/92583
        PR c++/92654
        * tree.c (cp_walk_subtrees): Walk CONSTRUCTOR types here.
        * pt.c (find_parameter_packs_r): Not here.

2020-02-12 Iain Sandoe <iain@sandoe.co.uk>

        * coroutines.cc (build_actor_fn): Implement deallocation function
        selection per n4849, dcl.fct.def.coroutine bullet 12.
        (morph_fn_to_coro): Implement allocation function selection per
        n4849, dcl.fct.def.coroutine bullets 9 and 10.

2020-02-12  Marek Polacek  <polacek@redhat.com>

        PR c++/93684 - ICE-on-invalid with broken attribute.
        * parser.c (cp_parser_std_attribute): Peek a token first before
        consuming it.

2020-02-11  Jason Merrill  <jason@redhat.com>

        PR c++/93675
        * class.c (add_implicitly_declared_members): Use do_friend.
        * method.c (implicitly_declare_fn): Fix friend handling.
        (decl_remember_implicit_trigger_p): New.
        (synthesize_method): Use it.
        * decl2.c (mark_used): Use it.

2020-02-11  Jason Merrill  <jason@redhat.com>

        PR c++/93650
        PR c++/90691
        * constexpr.c (maybe_constant_value): Correct earlier change.
        (cxx_eval_binary_expression) [SPACESHIP_EXPR]: Pass lval through.
        * method.c (genericize_spaceship): Wrap result in TARGET_EXPR.

2020-02-12  Patrick Palka  <ppalka@redhat.com>

        PR c++/69448
        PR c++/80471
        * type-utils.h (find_type_usage): Refactor to take a tree * and to
        return a tree *, and update documentation accordingly.
        * pt.c (make_auto_1): Set AUTO_IS_DECLTYPE when building a
        decltype(auto) node.
        (make_constrained_decltype_auto): No need to explicitly set
        AUTO_IS_DECLTYPE anymore.
        (splice_late_return_type): Use find_type_usage to find and
        replace a possibly nested auto node instead of using is_auto.
        Check test for is_auto into an assert when deciding whether
        to late_return_type.
        (type_uses_auto): Adjust the call to find_type_usage.
        * parser.c (cp_parser_decltype): No need to explicitly set
        AUTO_IS_DECLTYPE anymore.

        * error.c (dump_decl) [CONCEPT_DECL]: Use dump_simple_decl.
        (dump_simple_decl): Handle standard concept definitions as well as
        variable concept definitions.

2020-02-10  Jakub Jelinek  <jakub@redhat.com>

        PR other/93641
        * error.c (dump_decl_name): Fix up last argument to strncmp.

2020-02-10  Jason Merrill  <jason@redhat.com>

        PR c++/93618
        * tree.c (array_of_unknown_bound_p): New.
        * init.c (perform_member_init): Do nothing for flexible arrays.

2020-02-09  Jakub Jelinek  <jakub@redhat.com>

        PR c++/93633
        * constexpr.c (cxx_eval_constant_expression): If obj is heap var with
        ARRAY_TYPE, use the element type.  Punt if objtype after that is not
        a class type.

2020-02-08  Jason Merrill  <jason@redhat.com>

        PR c++/90691
        * expr.c (fold_for_warn): Call maybe_constant_value.
        * constexpr.c (struct constexpr_ctx): Add uid_sensitive bit-field.
        (maybe_constant_value): Add uid_sensitive parm.
        (get_fundef_copy): Don't copy if it's true.
        (cxx_eval_call_expression): Don't instantiate if it's true.
        (cxx_eval_outermost_constant_expr): Likewise.

        PR c++/92852
        * constexpr.c (maybe_constant_value): Don't unshare if the cached
        value is the same as the argument.

        * typeck.c (maybe_warn_about_returning_address_of_local): Add
        location parameter.

        * typeck2.c (process_init_constructor): Also clear TREE_SIDE_EFFECTS
        if appropriate.

2020-02-08  Jakub Jelinek  <jakub@redhat.com>

        PR c++/93549
        * constexpr.c (find_array_ctor_elt): If last element has no index,
        for flag_checking verify all elts have no index.  If i is within the
        elts, return it directly, if it is right after the last elt, append
        if NULL index, otherwise force indexes on all elts.
        (cxx_eval_store_expression): Allow cep->index to be NULL.

2020-02-07  Marek Polacek  <polacek@redhat.com>

        PR c++/92947 - Paren init of aggregates in unevaluated context.
        * call.c (build_new_method_call_1): Don't check
        cp_unevaluated_operand.  Check the return value of digest_init.

2020-02-06  Jason Merrill  <jason@redhat.com>

        PR c++/92654
        * tree.c (cp_walk_subtrees): Walk into type template arguments.
        * cp-tree.h (TYPE_TEMPLATE_INFO_MAYBE_ALIAS): Use typedef_variant_p
        instead of TYPE_ALIAS_P.
        * pt.c (push_template_decl_real): Likewise.
        (find_parameter_packs_r): Likewise.  Remove dead code.
        * error.c (find_typenames_r): Remove dead code.

2020-02-06  Jason Merrill  <jason@redhat.com>

        PR c++/92517
        * parser.c (cp_parser_constraint_primary_expression): Do the main
        parse non-tentatively.

2020-02-06  Marek Polacek  <polacek@redhat.com>

        PR c++/93597 - ICE with lambda in operator function.
        * name-lookup.c (maybe_save_operator_binding): Check is_overloaded_fn.

2020-02-05  Jason Merrill  <jason@redhat.com>

        PR c++/93140
        * pt.c (tsubst_decl) [PARM_DECL]: Check cp_unevaluated_operand in
        handling of TREE_CHAIN for empty pack.

2020-02-05  Jakub Jelinek  <jakub@redhat.com>

        PR c++/93557
        * semantics.c (cp_build_vec_convert): Call decay_conversion on arg
        prior to passing it to c_build_vec_convert.

2020-02-05  Marek Polacek  <polacek@redhat.com>

        PR c++/93559 - ICE with CONSTRUCTOR flags verification.
        * decl.c (reshape_init_array_1): Don't reuse a CONSTRUCTOR with
        TREE_SIDE_EFFECTS.

2020-02-05  Jason Merrill  <jason@redhat.com>

        PR c++/92593
        * decl.c (grokdeclarator): Reject field of current class type even
        in a template.

2020-02-05  Bin Cheng  <bin.cheng@linux.alibaba.com>

        * coroutines.cc (maybe_promote_captured_temps): Increase the index
        number for temporary variables' name.

2020-02-05  Jun Ma <JunMa@linux.alibaba.com>

        * coroutines.cc (build_co_await): Call convert_from_reference
        to wrap co_await_expr with indirect_ref which avoid
        reference/non-reference type confusion.

        (co_await_expander):  Sink to call_expr if await_resume
        is wrapped by indirect_ref.

2020-02-04  Jason Merrill  <jason@redhat.com>

        PR c++/93551
        * constraint.cc (satisfy_declaration_constraints): Check return
        value of push_tinst_level.

        PR c++/90951
        * constexpr.c (cxx_eval_array_reference): {}-initialize missing
        elements instead of value-initializing them.

        PR c++/86917
        * init.c (perform_member_init): Simplify.
        * constexpr.c (cx_check_missing_mem_inits): Allow uninitialized
        flexarray.
        (cxx_eval_vec_init_1): Handle CONSTRUCTOR.

2020-02-04  Iain Sandoe  <iain@sandoe.co.uk>

        * coroutines.cc (find_promise_type): Delete unused forward
        declaration.
        (struct coroutine_info): Add a bool for no promise type error.
        (coro_promise_type_found_p): Only emit the error for a missing
        promise once in each affected coroutine.

2020-02-03  Jason Merrill  <jason@redhat.com>

        PR c++/66477
        * constexpr.c (cxx_eval_constant_expression) [PARM_DECL]: Don't
        defer loading the value of a reference.

2020-02-03  Jason Merrill  <jason@redhat.com>

        PR c++/91953
        * constexpr.c (potential_constant_expression_1) [PARM_DECL]: Allow
        empty class type.
        [COMPONENT_REF]: A member function reference doesn't use the object
        as an rvalue.

2020-02-03  Iain Sandoe  <iain@sandoe.co.uk>

        PR c++/93458
        * coroutines.cc (struct coroutine_info): Add a bool flag to note
        that we emitted an error for a bad function return type.
        (get_coroutine_info): Tolerate an unset info table in case of
        missing traits.
        (find_coro_traits_template_decl): In case of error or if we didn't
        find a type template, note we emitted the error and suppress
        duplicates.
        (find_coro_handle_template_decl): Likewise.
        (instantiate_coro_traits): Only check for error_mark_node in the
        return from lookup_qualified_name. 
        (coro_promise_type_found_p): Reorder initialization so that we check
        for the traits and their usability before allocation of the info
        table.  Check for a suitable return type and emit a diagnostic for
        here instead of relying on the lookup machinery.  This allows the
        error to have a better location, and means we can suppress multiple
        copies.
        (coro_function_valid_p): Re-check for a valid promise (and thus the
        traits) before proceeding.  Tolerate missing info as a fatal error.

2020-02-03  Jason Merrill  <jason@redhat.com>

        PR c++/88256
        * cp-gimplify.c (predeclare_vla): New.
        (cp_genericize_r) [NOP_EXPR]: Call it.

2020-02-03  Jun Ma <JunMa@linux.alibaba.com>

        * coroutines.cc (transform_await_wrapper): Set actor funcion as
        new context of label_decl.
        (build_actor_fn): Fill new field of await_xform_data.

2020-02-02  Marek Polacek  <polacek@redhat.com>

        PR c++/93530 - ICE on invalid alignas in a template.
        * decl.c (grokdeclarator): Call cplus_decl_attributes instead of
        decl_attributes.

2020-01-31  Jason Merrill  <jason@redhat.com>

        PR c++/86216
        * semantics.c (process_outer_var_ref): Capture VLAs even in
        unevaluated context.

        PR c++/14179
        * decl.c (reshape_init_array_1): Reuse a single CONSTRUCTOR with
        non-aggregate elements.
        (reshape_init_array): Add first_initializer_p parm.
        (reshape_init_r): Change first_initializer_p from bool to tree.
        (reshape_init): Pass init to it.

        PR c++/14179
        * parser.c (cp_parser_initializer_list): Suppress location wrappers
        after 256 elements.

2020-01-29  Jason Merrill  <jason@redhat.com>

        PR c++/82521
        * pt.c (tsubst_copy_and_build) [EQ_EXPR]: Only suppress warnings if
        the expression was dependent before substitution.

2020-01-30  Bin Cheng  <bin.cheng@linux.alibaba.com>

        * coroutines.cc (act_des_fn): New.
        (morph_fn_to_coro): Call act_des_fn to build actor/destroy decls.
        Access promise via actor function's frame pointer argument.
        (build_actor_fn, build_destroy_fn): Use frame pointer argument.

2020-01-30  Bin Cheng  <bin.cheng@linux.alibaba.com>

        * coroutines.cc (co_await_expander): Handle type conversion case.

2020-01-29  Jason Merrill  <jason@redhat.com>

        PR c++/90333
        PR c++/89640
        PR c++/60503
        * parser.c (cp_parser_type_specifier_seq): Don't parse attributes in
        a trailing return type.
        (cp_parser_lambda_declarator_opt): Parse C++11 attributes before
        parens.

2020-01-29  Marek Polacek  <polacek@redhat.com>

        PR c++/91754 - Fix template arguments comparison with class NTTP.
        * pt.c (class_nttp_const_wrapper_p): New.
        (template_args_equal): See through class_nttp_const_wrapper_p
        arguments.

2020-01-29  Marek Polacek  <polacek@redhat.com>

        PR c++/92948 - Fix class NTTP with template arguments.
        * pt.c (convert_nontype_argument): Use IMPLICIT_CONV_EXPR when
        converting a value-dependent expression to a class type.
        (tsubst_copy) <case VIEW_CONVERT_EXPR>: Allow IMPLICIT_CONV_EXPR
        as the result of the tsubst_copy call.

2020-01-29  Jakub Jelinek  <jakub@redhat.com>

        PR c++/91118
        * cp-gimplify.c (cxx_omp_predetermined_sharing): Return
        OMP_CLAUSE_DEFAULT_SHARED for typeinfo decls.

2020-01-28  Jason Merrill  <jason@redhat.com>

        PR c++/93442
        * parser.c (cp_parser_lambda_expression): Clear in_discarded_stmt.

        PR c++/93477
        PR c++/91476
        * decl2.c (copy_linkage): Do copy DECL_ONE_ONLY and DECL_WEAK.

        PR c++/90546
        * call.c (build_user_type_conversion_1): Allow a template conversion
        returning an rvalue reference to bind directly to an lvalue.

        PR c++/90731
        * decl.c (grokdeclarator): Propagate eh spec from typedef.

2020-01-28  Martin Liska  <mliska@suse.cz>

        PR c++/92440
        * pt.c (redeclare_class_template): Group couple of
        errors and inform messages with auto_diagnostic_group.

2020-01-28  Martin Liska  <mliska@suse.cz>

        PR c++/92440
        * pt.c (redeclare_class_template): Use inform
        for the second location.

2020-01-27  Jason Merrill  <jason@redhat.com>

        PR c++/90966
        * pt.c (tsubst_copy) [STRING_CST]: Don't use fold_convert.

2020-01-27  Iain Sandoe  <iain@sandoe.co.uk>

        PR c++/93443
        * coroutines.cc (morph_fn_to_coro): Check the ramp return
        value when it is constructed from the 'get return object'.

2020-01-27  Nathan Sidwell  <nathan@acm.org>

        PR c++/91826
        * name-lookup.c (is_ancestor): Allow CHILD to be a namespace alias.

2020-01-26  Jason Merrill  <jason@redhat.com>

        PR c++/90992
        * except.c (maybe_noexcept_warning): Check DECL_IN_SYSTEM_HEADER and
        temporarily enable -Wsystem-headers.  Change second warning to
        conditional inform.

        PR c++/90997
        * semantics.c (finish_call_expr): Don't call
        instantiate_non_dependent_expr before warn_for_memset.

2020-01-25  Marek Polacek  <polacek@redhat.com>

        PR c++/93414 - poor diagnostic for dynamic_cast in constexpr context.
        * constexpr.c (cxx_eval_dynamic_cast_fn): Add a reference
        dynamic_cast diagnostic.

2020-01-24  Jason Merrill  <jason@redhat.com>

        PR c++/93400 - ICE with constrained friend.
        * constraint.cc (maybe_substitute_reqs_for): New.
        * decl.c (function_requirements_equivalent_p): Call it.
        * pt.c (tsubst_friend_function): Only substitute
        TEMPLATE_PARMS_CONSTRAINTS.
        (tsubst_template_parms): Copy constraints.

2020-01-24  Jason Merrill  <jason@redhat.com>

        PR c++/93279 - ICE with lambda in member operator.
        * name-lookup.c (maybe_save_operator_binding): Don't remember
        class-scope bindings.

2020-01-24  Jason Merrill  <jason@redhat.com>

        PR c++/93377 - ICE with member alias in constraint.
        * pt.c (any_template_parm_r): Look at template arguments for all
        aliases, not only alias templates.

2020-01-24  Marek Polacek  <polacek@redhat.com>

        PR c++/93299 - ICE in tsubst_copy with parenthesized expression.
        * pt.c (tsubst_copy): Handle a REF_PARENTHESIZED_P VIEW_CONVERT_EXPR.

2020-01-24  Jason Merrill  <jason@redhat.com>

        PR c++/92852 - ICE with generic lambda and reference var.
        * constexpr.c (maybe_constant_value): Likewise.

2020-01-23  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/92804
        * parser.c (cp_parser_nested_name_specifier_opt): Properly
        diagnose concept-ids.

2020-01-23  Jason Merrill  <jason@redhat.com>

        PR c++/93331 - ICE with __builtin_strchr.
        * constexpr.c (cxx_eval_builtin_function_call): Use the original
        argument if we didn't manage to extract a STRING_CST.

        PR c++/93345 - ICE with defaulted dtor and template.
        PR c++/33799
        * decl.c (cxx_maybe_build_cleanup): Don't try to set
        throwing_cleanup in a template.

2020-01-22  Marek Polacek  <polacek@redhat.com>

        PR c++/92907 - noexcept does not consider "const" in member functions.
        * g++.dg/cpp0x/noexcept56.C: New test.

2020-01-22  Marek Polacek  <polacek@redhat.com>

        PR c++/93324 - ICE with -Wall on constexpr if.
        * semantics.c (is_std_constant_evaluated_p): Check fndecl.

2020-01-22  Patrick Palka  <ppalka@redhat.com>

        * constraint.cc (get_mapped_args): Avoid using auto_vec
        as a vector element.  Release the vectors inside the lists
        vector.
        * parser.c (cp_literal_operator_id): Free the buffer.

2020-01-22  Jun Ma  <JunMa@linux.alibaba.com>

        * coroutines.cc (finish_co_await_expr): Add error check on return
        value of build_co_await.
        (finish_co_yield_expr,): Ditto.

2020-01-22  Jun Ma  <JunMa@linux.alibaba.com>

        * coroutines.cc (lookup_awaitable_member): Lookup an awaitable member.
        (lookup_promise_method): Emit diagnostic when get NULL_TREE back only.
        (build_co_await): Use lookup_awaitable_member instead of lookup_member.

2020-01-21  Jason Merrill  <jason@redhat.com>

        PR c++/60855 - ICE with sizeof VLA capture.
        * lambda.c (is_lambda_ignored_entity): Don't look past VLA capture.

        PR c++/90732 - ICE with VLA capture and generic lambda.
        * pt.c (tsubst_lambda_expr): Repeat add_capture for VLAs.

2020-01-21  Iain Sandoe  <iain@sandoe.co.uk>
            Bin Cheng  <bin.cheng@linux.alibaba.com>

        * coroutines.cc (coro_promise_type_found_p): Check for NULL return
        from complete_type_or_else.
        (register_param_uses): Likewise.
        (build_co_await): Do not try to use complete_type_or_else for void
        types, otherwise for incomplete types, check for NULL return from
        complete_type_or_else.

2020-01-21  Jason Merrill  <jason@redhat.com>

        PR c++/91476 - anon-namespace reference temp clash between TUs.
        * decl2.c (copy_linkage): Factor out of get_guard.
        * call.c (make_temporary_var_for_ref_to_temp): Use it.
        * decl.c (cp_finish_decomp): Use it.
        (cp_finish_decl): determine_visibility sooner.

2020-01-21  Bin Cheng  <bin.cheng@linux.alibaba.com>

        * coroutines.cc (finish_co_await_expr): Set return value flag.
        (finish_co_yield_expr, morph_fn_to_coro): Ditto.

2020-01-19  Jason Merrill  <jason@redhat.com>

        PR c++/33799 - destroy return value, take 2.
        * cp-tree.h (current_retval_sentinel): New macro.
        (struct language_function): Add throwing_cleanup bitfield.
        * decl.c (cxx_maybe_build_cleanup): Set it.
        * except.c (maybe_set_retval_sentinel)
        (maybe_splice_retval_cleanup): New functions.
        * parser.c (cp_parser_compound_statement): Call
        maybe_splice_retval_cleanup.
        * typeck.c (check_return_expr): Call maybe_set_retval_sentinel.

        * parser.c (cp_parser_lambda_body): Use cp_parser_function_body.

2020-01-18  Jakub Jelinek  <jakub@redhat.com>

        * coroutines.cc (get_fn_local_identifier): Fix NO_DOT_IN_LABEL
        but non-NO_DOLLAR_IN_LABEL case build.

2020-01-18  Iain Sandoe  <iain@sandoe.co.uk>

        * Make-lang.in: Add coroutines.o.
        * cp-tree.h (lang_decl-fn): coroutine_p, new bit.
        (DECL_COROUTINE_P): New.
        * lex.c (init_reswords): Enable keywords when the coroutine flag
        is set,
        * operators.def (co_await): New operator.
        * call.c (add_builtin_candidates): Handle CO_AWAIT_EXPR.
        (op_error): Likewise.
        (build_new_op_1): Likewise.
        (build_new_function_call): Validate coroutine builtin arguments.
        * constexpr.c (potential_constant_expression_1): Handle
        CO_AWAIT_EXPR, CO_YIELD_EXPR, CO_RETURN_EXPR.
        * coroutines.cc: New file.
        * cp-objcp-common.c (cp_common_init_ts): Add CO_AWAIT_EXPR,
        CO_YIELD_EXPR, CO_RETRN_EXPR as TS expressions.
        * cp-tree.def (CO_AWAIT_EXPR, CO_YIELD_EXPR, (CO_RETURN_EXPR): New.
        * cp-tree.h (coro_validate_builtin_call): New.
        * decl.c (emit_coro_helper): New.
        (finish_function): Handle the case when a function is found to
        be a coroutine, perform the outlining and emit the outlined
        functions. Set a bit to signal that this is a coroutine component.
        * parser.c (enum required_token): New enumeration RT_CO_YIELD.
        (cp_parser_unary_expression): Handle co_await.
        (cp_parser_assignment_expression): Handle co_yield.
        (cp_parser_statement): Handle RID_CO_RETURN.
        (cp_parser_jump_statement): Handle co_return.
        (cp_parser_operator): Handle co_await operator.
        (cp_parser_yield_expression): New.
        (cp_parser_required_error): Handle RT_CO_YIELD.
        * pt.c (tsubst_copy): Handle CO_AWAIT_EXPR.
        (tsubst_expr): Handle CO_AWAIT_EXPR, CO_YIELD_EXPR and
        CO_RETURN_EXPRs.
        * tree.c (cp_walk_subtrees): Likewise.

2020-01-17  Jason Merrill  <jason@redhat.com>

        PR c++/92531 - ICE with noexcept(lambda).
        * pt.c (uses_template_parms): Don't try to enumerate all the
        expression cases.

2020-01-17  Jakub Jelinek  <jakub@redhat.com>

        PR c++/93228
        * parser.c (cp_parser_template_name): Look up deprecated attribute
        in DECL_TEMPLATE_RESULT or its type's attributes.

2020-01-16  Jason Merrill  <jason@redhat.com>

        PR c++/93286 - ICE with __is_constructible and variadic template.
        * pt.c (tsubst) [TREE_LIST]: Handle pack expansion.
        (tsubst_copy_and_build) [TRAIT_EXPR]: Always use tsubst for type2.

        PR c++/93280 - ICE with aggregate assignment and DMI.
        * init.c (get_nsdmi): Set TARGET_EXPR_DIRECT_INIT_P here.
        * typeck2.c (digest_nsdmi_init): Not here.

2020-01-15  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/91073
        * cp-tree.h (is_constrained_auto): New.
        * parser.c (cp_parser_maybe_commit_to_declaration): Correctly
        handle concept-check expressions; take a cp_decl_specifier_seq*
        instead of a bool.
        (cp_parser_condition): Update call.
        (cp_parser_simple_declaration): Likewise.
        (cp_parser_placeholder_type_specifier): Correctly handle
        concept-check expressions.

2020-01-15  Jason Merrill  <jason@redhat.com>

        Revert
        PR c++/33799 - destroy return value if local cleanup throws.
        * cp-tree.h (current_retval_sentinel): New macro.
        * decl.c (start_preparsed_function): Set up cleanup for retval.
        * typeck.c (check_return_expr): Set current_retval_sentinel.

        PR c++/93257 - consteval void function.
        * constexpr.c (verify_constant): Allow void_node.

        PR c++/92871 - bad code with xvalue and GNU ?: extension.
        * call.c (prevent_lifetime_extension): New.
        (build_conditional_expr_1): Use it.

2020-01-14  Nathan Sidwell  <nathan@acm.org>

        PR c++/90916
        * pt.c (retrieve_specialization): Use get_template_info, not open
        coding access.

        PR c++/90916
        * pt.c (retrieve_specialization): Get the TI from the decl or the
        classtype as appropriate.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

        * cp-gimplify.c (source_location_table_entry_hash::empty_zero_p):
        New static constant.
        * cp-tree.h (named_decl_hash::empty_zero_p): Likewise.
        (struct named_label_hash::empty_zero_p): Likewise.
        * decl2.c (mangled_decl_hash::empty_zero_p): Likewise.

2020-01-14  Jason Merrill  <jason@redhat.com>

        PR c++/92590 - wrong handling of inherited default ctor.
        * class.c (add_method): A constrained inherited ctor doesn't hide an
        implicit derived ctor.
        Revert:
        PR c++/92552 - ICE with inherited constrained default ctor.
        * pt.c (instantiate_class_template_1): Copy
        TYPE_HAS_USER_CONSTRUCTOR.
        PR c++/91930 - ICE with constrained inherited default ctor.
        * name-lookup.c (do_class_using_decl): Set TYPE_HAS_USER_CONSTRUCTOR
        for inherited constructor.
        PR c++/92594 - ICE with inherited trivial default ctor.
        * method.c (trivial_fn_p): Treat an inherited default constructor
        like a normal default constructor.

        PR c++/92594 - ICE with inherited trivial default ctor.
        * method.c (trivial_fn_p): Treat an inherited default constructor
        like a normal default constructor.

        PR c++/92009 - ICE with punning of typeid.
        * rtti.c (get_tinfo_desc): Call xref_basetypes.
        * constexpr.c (cxx_fold_indirect_ref): Don't strip
        REINTERPRET_CAST_P.

2020-01-13  Jason Merrill  <jason@redhat.com>

        PR c++/92746 - ICE with noexcept of function concept check.
        * except.c (check_noexcept_r): Handle concept-check.

        PR c++/92582 - ICE with member template as requirement.
        * pt.c (struct find_template_parameter_info): Add ctx_parms.
        (any_template_parm_r): Handle TEMPLATE_DECL.
        (find_template_parameters): Take parms instead of their depth.
        * constraint.cc (build_parameter_mapping): Pass them.

        PR c++/33799 - destroy return value if local cleanup throws.
        * cp-tree.h (current_retval_sentinel): New macro.
        * decl.c (start_preparsed_function): Set up cleanup for retval.
        * typeck.c (check_return_expr): Set current_retval_sentinel.

        PR c++/93238 - short right-shift with enum.
        * typeck.c (cp_build_binary_op): Use folded op1 for short_shift.

2020-01-10  Jason Merrill  <jason@redhat.com>

        * typeck.c (cp_build_binary_op): Restore short_shift code.

        PR c++/93143 - incorrect tree sharing with constexpr.
        * constexpr.c (cxx_eval_outermost_constant_expr): Don't assume
        CONSTRUCTORs are already unshared.

        PR c++/93173 - incorrect tree sharing.
        PR c++/93033
        * cp-gimplify.c (cp_gimplify_init_expr, cp_gimplify_expr): Use
        copy_if_shared after cp_genericize_tree.
        * typeck2.c (split_nonconstant_init): Don't unshare here.

2020-01-08  Jason Merrill  <jason@redhat.com>

        * cp-gimplify.c (cp_gimplify_expr) [TARGET_EXPR]: Check
        TARGET_EXPR_DIRECT_INIT_P.
        * constexpr.c (cxx_eval_constant_expression): Likewise.

2020-01-08  Jason Merrill  <jason@redhat.com>

        PR c++/91369 - constexpr destructor and member initializer.
        * constexpr.c (cxx_eval_store_expression): Look through TARGET_EXPR
        when not preevaluating.

2020-01-08  Jason Merrill  <jason@redhat.com>

        * constexpr.c (cxx_eval_call_expression): Remove DECL_BY_REFERENCE
        support.

2020-01-07  Paolo Carlini  <paolo.carlini@oracle.com>

        * init.c (build_new): Add location_t parameter and use it throughout.
        (build_raw_new_expr): Likewise.
        * parser.c (cp_parser_new_expression): Pass the combined_loc.
        * pt.c (tsubst_copy_and_build): Adjust call.
        * cp-tree.h: Update declarations.

2020-01-07  Jason Merrill  <jason@redhat.com>

        PR c++/47877 - -fvisibility-inlines-hidden and member templates.
        * decl2.c (determine_visibility): -fvisibility-inlines-hidden beats
        explicit class visibility for a template.

2020-01-07  Richard Sandiford  <richard.sandiford@arm.com>

        * mangle.c (mangle_type_attribute_p): New function, split out from...
        (write_CV_qualifiers_for_type): ...here.  Don't mangle attributes
        that contain a space.

2020-01-07  Jakub Jelinek  <jakub@redhat.com>

        PR c++/91369
        * constexpr.c (struct constexpr_global_ctx): Add heap_alloc_count
        member, initialize it to zero in ctor.
        (cxx_eval_call_expression): Bump heap_dealloc_count when deleting
        a heap object.  Don't cache calls to functions which allocate some
        heap objects and don't deallocate them or deallocate some heap
        objects they didn't allocate.

2020-01-06  Jason Merrill  <jason@redhat.com>

        PR c++/92552 - ICE with inherited constrained default ctor.
        * pt.c (instantiate_class_template_1): Copy
        TYPE_HAS_USER_CONSTRUCTOR.
        * class.c (one_inherited_ctor): Don't set it here.

2020-01-06  Andrew Sutton  <asutton@lock3software.com>

        PR c++/92739 - parsing requires clause with attributes.
        * parser.c (cp_parser_constraint_requires_parens): Exclude
        attributes as postfix expressions.

2020-01-05  Jakub Jelinek  <jakub@redhat.com>

        PR c++/93138
        * parser.c (cp_parser_check_class_key): Disable access checks for the
        simple name lookup.
        (cp_parser_maybe_warn_enum_key): Likewise.  Return early if
        !warn_redundant_tags.

2010-01-05  Jakub Jelinek  <jakub@redhat.com>

        PR c++/93046
        * cp-gimplify.c (cp_gimplify_init_expr): Don't look through
        TARGET_EXPR if it has been gimplified already.

2020-01-03  Jason Merrill  <jason@redhat.com>

        PR c++/93033 - incorrect tree node sharing with array init.
        * typeck2.c (split_nonconstant_init): Unshare non-decl.
        * cp-gimplify.c (cp_gimplify_init_expr): Only split if -fexceptions.

2020-01-02  Jason Merrill  <jason@redhat.com>

        * pt.c (invalid_nontype_parm_type_p): Reject class placeholder in
        C++17.

2020-01-02  Jakub Jelinek  <jakub@redhat.com>

        PR c/90677
        * cp-objcp-common.c (identifier_global_tag): Return NULL_TREE if name
        has not been found, rather than error_mark_node.

2020-01-01  Jakub Jelinek  <jakub@redhat.com>

        Update copyright years.
\f
Copyright (C) 2020 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.