2021-04-21  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-09-19  Patrick Palka  <ppalka@redhat.com>

	PR c++/97051
	* constraint.cc (satisfy_atom): Pass true as the
	manifestly_const_eval argument to maybe_constant_value.

2021-04-21  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-07-30  Patrick Palka  <ppalka@redhat.com>

	PR c++/95486
	* pt.c (alias_ctad_tweaks): Call remove_constraints before
	calling set_constraints.

2021-04-20  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-10-08  Patrick Palka  <ppalka@redhat.com>

	PR c++/97052
	* constraint.cc (build_type_constraint): Temporarily increment
	processing_template_decl before calling build_concept_check.
	* pt.c (make_constrained_placeholder_type): Likewise.

2021-04-20  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2021-01-20  Patrick Palka  <ppalka@redhat.com>

	PR c++/95434
	* pt.c (tsubst) <case TEMPLATE_TYPE_PARM>: If tsubsting
	CLASS_PLACEHOLDER_TEMPLATE yields a TEMPLATE_TEMPLATE_PARM,
	adjust to its TEMPLATE_TEMPLATE_PARM_TEMPLATE_DECL.

2021-04-20  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2021-04-14  Patrick Palka  <ppalka@redhat.com>

	PR c++/83476
	PR c++/99885
	* pt.c (deducible_expression): Look through implicit
	INDIRECT_REFs as well.

2021-04-20  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-04-16  Jakub Jelinek  <jakub@redhat.com>

	PR c++/100111
	* constexpr.c (cxx_eval_store_expression): Don't add CONSTRUCTORs
	for empty classes into *valp when types don't match even when *valp
	is NULL.

2021-04-20  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-04-16  Jakub Jelinek  <jakub@redhat.com>

	PR c++/99833
	* pt.c (extract_locals_r): When handling DECL_EXPR of a structured
	binding, add to data.internal also all corresponding structured
	binding decls.

2021-04-20  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-04-08  Jakub Jelinek  <jakub@redhat.com>

	PR c++/99859
	* constexpr.c (addr_of_non_const_var): New function.
	(cxx_bind_parameters_in_call): Set *non_constant_args to true
	even if cp_walk_tree on arg with addr_of_non_const_var callback
	returns true.

2021-04-11  Marek Polacek  <polacek@redhat.com>

	PR c++/97966
	* pt.c (instantiate_class_template_1): Use FOR_EACH_VEC_ELT instead
	of range-based for loop.

2021-04-10  Marek Polacek  <polacek@redhat.com>

	PR c++/97973
	* call.c (conv_unsafe_in_template_p): New.
	(convert_like): Use it.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-04-09  Marek Polacek  <polacek@redhat.com>

	PR c++/99806
	* parser.c (cp_parser_member_declaration): Call
	cp_parser_save_default_args even for function templates.  Use
	STRIP_TEMPLATE on the declaration we're passing.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-04-03  Marek Polacek  <polacek@redhat.com>

	PR c++/91416
	* parser.c: Create a GC root for attributes in a decl specifier.
	(cp_parser_type_specifier): Push/pop ->attributes onto/from it.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-04-01  Marek Polacek  <polacek@redhat.com>

	PR c++/99831
	* method.c (defaulted_late_check): ++ and -- function_depth around
	the call to synthesize_method.
	* pt.c: Remove the saved_trees global.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-03-25  Marek Polacek  <polacek@redhat.com>

	PR c++/99331
	* call.c (build_converted_constant_expr_internal): Don't emit
	-Wconversion warnings.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	DR 1312
	PR c++/99176
	* constexpr.c (is_std_construct_at): New overload.
	(is_std_allocator_allocate): New overload.
	(cxx_eval_call_expression): Use the new overloads.
	(cxx_eval_constant_expression): Reject casting
	from void * as per DR 1312.  Don't check can_convert.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-03-05  Marek Polacek  <polacek@redhat.com>

	PR c++/99120
	* name-lookup.c (check_local_shadow): Check if the type of decl
	is non-null before checking TYPE_PTR*.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-03-05  Marek Polacek  <polacek@redhat.com>

	PR c++/99374
	* call.c (standard_conversion): When converting pointers to
	member, don't return NULL when the bases are equivalent but
	incomplete.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-02-05  Marek Polacek  <polacek@redhat.com>

	PR c++/98947
	* call.c (build_conditional_expr_1): Don't call mark_lvalue_use
	on arg2/arg3.
	* expr.c (mark_use) <case MODIFY_EXPR>: Don't check read_p when
	issuing the -Wvolatile warning.  Only set TREE_THIS_VOLATILE if
	a warning was emitted.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	PR c++/97966
	* pt.c (instantiate_class_template_1): Instantiate members
	marked with attribute used only after we're done instantiating
	the class.

2021-04-09  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-01-19  Marek Polacek  <polacek@redhat.com>

	PR c++/98333
	* parser.c (cp_parser_class_specifier_1): Perform late-parsing
	of NSDMIs before late-parsing of noexcept-specifiers.

2021-04-08  Release Manager

	* GCC 10.3.0 released.

2021-04-01  Jakub Jelinek  <jakub@redhat.com>

	PR c++/98481
	* class.c (find_abi_tags_r): Set *walk_subtrees to 2 instead of 1
	for types.
	(mark_abi_tags_r): Likewise.
	* tree.c (cp_walk_subtrees): If *walk_subtrees_p is 2, look through
	typedefs.

2021-03-31  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2021-02-26  Patrick Palka  <ppalka@redhat.com>

	PR c++/98990
	* pt.c (splice_late_return_type): Rebuild the entire return type
	if we have to adjust the level of an auto within.
	(type_uses_auto): Adjust call to find_type_usage.
	* type-utils.h (find_type_usage): Revert r10-6571 change that
	made this function return a pointer to the auto node.

2021-03-31  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2021-02-23  Patrick Palka  <ppalka@redhat.com>

	PR c++/95468
	* pt.c (tsubst_copy_and_build) <case BASELINK>: New case, copied
	over from tsubst_copy.

2021-03-31  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2021-01-12  Patrick Palka  <ppalka@redhat.com>

	PR c++/98611
	* tree.c (cp_walk_subtrees) <case TEMPLATE_TYPE_PARM>: Visit
	the template of a CTAD placeholder.

2021-03-31  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-09-19  Patrick Palka  <ppalka@redhat.com>

	PR c++/96531
	PR c++/97103
	* constraint.cc (map_arguments): Call template_parm_to_arg
	in the self-mapping case.
	(finish_shorthand_constraint): No need to build a TREE_LIST
	before calling template_parm_to_arg.
	* pt.c (template_parm_to_arg): Rewrite to handle TEMPLATE_PARM_P
	nodes as well as DECL_TEMPLATE_PARM_P nodes, and to make the
	overlying TREE_LIST node optional.
	(keep_template_parm): Don't record a BOUND_TEMPLATE_TEMPLATE_PARM,
	instead record its corresponding TEMPLATE_TEMPLATE_PARM.
	(convert_generic_types_to_packs): Don't call
	template_parm_to_arg.

2021-03-30  Jakub Jelinek  <jakub@redhat.com>

	PR c++/99790
	* cp-gimplify.c (cp_gimplify_expr): Handle PTRMEM_CST.

2021-03-30  Jakub Jelinek  <jakub@redhat.com>

	PR c++/99705
	* tree.c (bot_manip): Remap artificial automatic temporaries mentioned
	in DECL_EXPR or in BIND_EXPR_VARS.

2021-03-30  Jakub Jelinek  <jakub@redhat.com>

	PR c++/99745
	* decl2.c (grokbitfield): Diagnose bitfields containing bare parameter
	packs and don't set DECL_BIT_FIELD_REPRESENTATIVE in that case.

2021-03-30  Jakub Jelinek  <jakub@redhat.com>

	PR c++/99650
	* decl.c (cp_finish_decomp): Diagnose void initializers when
	using tuple_element and get.

2021-03-29  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-03-23  Marek Polacek  <polacek@redhat.com>

	PR c++/99318
	* decl2.c (cp_warn_deprecated_use_scopes): Only call
	cp_warn_deprecated_use when decl is a namespace, class, or enum.

2021-03-24  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-03-18  Iain Sandoe  <iain@sandoe.co.uk>

	PR objc++/49070
	* parser.c (cp_debug_parser): Add Objective-C++ message
	state flag.
	(cp_parser_nested_name_specifier_opt): Allow colon to
	terminate an assignment-expression when parsing Objective-
	C++ messages.
	(cp_parser_objc_message_expression): Set and clear message
	parsing state on entry and exit.
	* parser.h (struct cp_parser): Add a context flag for
	Objective-C++ message state.

2021-03-24  Iain Sandoe  <iain@sandoe.co.uk>

	* parser.c (cp_parser_objc_at_property_declaration):
	Improve parsing fidelity. Associate better location info
	with @property attributes.  Clean up the interface to
	objc_add_property_declaration ().

2021-03-24  Iain Sandoe  <iain@sandoe.co.uk>

	* parser.c (cp_parser_objc_at_property_declaration): Use any
	exisiting syntax error to suppress complaints about a missing
	closing parenthesis in parsing property attributes.

2021-03-22  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/99047
	* coroutines.cc (expand_one_await_expression): If the
	await_ready() expression is not a boolean then convert it
	as required.

2021-03-22  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/98704
	* coroutines.cc (build_actor_fn): Make destroy index 1
	correspond to the abnormal unhandled_exception() exit.
	Substitute the proxy for the resume index.
	(coro_rewrite_function_body): Arrange to reset the resume
	index and make done = true for a rethrown exception from
	unhandled_exception ().
	(morph_fn_to_coro): Adjust calls to build_actor_fn and
	coro_rewrite_function_body.

2021-03-22  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/98480
	* coroutines.cc (replace_continue): Rewrite continue into
	'goto label'.
	(await_statement_walker): Handle await expressions in the
	initializer, condition and iteration expressions of for
	loops.

2021-03-22  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/96749
	* coroutines.cc (flatten_await_stmt): Allow for the case
	where a target expression variable only has uses in the
	second part of a compound expression.
	(maybe_promote_temps): Avoid emiting empty statements.

2021-03-22  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-03-05  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/98118
	* coroutines.cc (build_co_await): Use type_build_ctor_call()
	to determine cases when a CTOR needs to be built.
	(flatten_await_stmt): Likewise.
	(morph_fn_to_coro): Likewise.

2021-03-22  Iain Sandoe  <iain@sandoe.co.uk>
	    Jakub Jelinek   <jakub@redhat.com>

	PR c++/95616
	* coroutines.cc (coro_diagnose_throwing_fn): New helper.
	(coro_diagnose_throwing_final_aw_expr): New helper.
	(build_co_await): Diagnose throwing final await expression
	components. Look through NOP_EXPRs inbuild_special_member_call
	return value to find the CALL_EXPR. Simplify.
	(build_init_or_final_await): Diagnose a throwing promise
	final_suspend() call.

2021-03-22  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-03-05  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95615
	* coroutines.cc (struct param_info): Track parameter copies that need
	a DTOR.
	(coro_get_frame_dtor): New helper function factored from build_actor().
	(build_actor_fn): Use coro_get_frame_dtor().
	(morph_fn_to_coro): Track parameters that need DTORs on exception,
	likewise the frame promise and the return object.  On exception, run the
	DTORs for these, destroy the frame and then rethrow the exception.

2021-03-22  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-02-25  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/97587
	* coroutines.cc (struct param_info): Track rvalue refs.
	(morph_fn_to_coro): Track rvalue refs, and call the promise
	CTOR with the frame copy of passed parms.

2021-03-22  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-02-25  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95822
	* coroutines.cc (morph_fn_to_coro): Unconditionally remove any
	set throwing_cleanup marker.

2021-03-21  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2021-02-24  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/96251
	* coroutines.cc (coro_common_keyword_context_valid_p): Suppress
	error reporting when instantiating for a constexpr.

2021-03-21  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-05-30  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (morph_fn_to_coro): Revise initialization
	of the frame pointer to avoid an unused value.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-03-16  Jakub Jelinek  <jakub@redhat.com>

	PR c++/99613
	* decl.c (expand_static_init): For thread guards, call __cxa_atexit
	before calling __cxa_guard_release rather than after it.  Formatting
	fixes.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-03-12  Jakub Jelinek  <jakub@redhat.com>

	PR c++/99507
	* call.c (build_over_call): For immediate evaluation of functions
	that return references, undo convert_from_reference effects before
	calling cxx_constant_value and call convert_from_reference
	afterwards.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-03-04  Jakub Jelinek  <jakub@redhat.com>

	PR c++/88146
	PR c++/99362
	* cvt.c (convert_to_void): Revert 2019-10-17 changes.  Clarify
	comment.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-03-03  Jakub Jelinek  <jakub@redhat.com>

	PR c++/82959
	* call.c (op_is_ordered): Handle TRUTH_ANDIF_EXPR, TRUTH_ORIF_EXPR
	and COMPOUND_EXPR.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-02-26  Jakub Jelinek  <jakub@redhat.com>

	PR c++/95451
	* lambda.c (is_lambda_ignored_entity): Before checking for
	LAMBDA_FUNCTION_P, use OVL_FIRST.  Drop FUNCTION_DECL check.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-02-17  Jakub Jelinek  <jakub@redhat.com>

	PR sanitizer/99106
	* init.c (build_zero_init_1): For flexible array members just return
	NULL_TREE instead of returning empty CONSTRUCTOR with non-complete
	ARRAY_TYPE.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-02-12  Jakub Jelinek  <jakub@redhat.com>

	PR c++/97742
	* parser.c (cp_parser_requirement_seq): Stop iterating after reaching
	CPP_EOF.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-02-11  Jakub Jelinek  <jakub@redhat.com>

	PR c++/99033
	* init.c (build_zero_init_1): Handle zero initialiation of
	flexible array members like initialization of [0] arrays.
	Use integer_minus_onep instead of comparison to integer_minus_one_node
	and integer_zerop instead of comparison against size_zero_node.
	Formatting fixes.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-02-10  Jakub Jelinek  <jakub@redhat.com>

	PR c++/98988
	PR c++/99031
	* constexpr.c: Include cgraph.h.
	(cxx_eval_call_expression): Call varpool_node::finalize_decl on
	heap artificial vars.
	(cxx_eval_outermost_constant_expr): Remove varpool nodes for
	heap artificial vars.

2021-03-19  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2021-02-05  Jakub Jelinek  <jakub@redhat.com>

	PR c++/97878
	* decl.c (check_array_initializer): For structured bindings, require
	the array type to be complete.

2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (struct var_nest_node): Provide a default
	CTOR.

2021-03-06  Tobias Burnus  <tobias@codesourcery.com>

	Backported from master:
	2021-03-05  Tobias Burnus  <tobias@codesourcery.com>

	PR c/99137
	* parser.c (cp_parser_oacc_clause_async): Reject comma expressions.

2021-03-04  Jason Merrill  <jason@redhat.com>

	PR c++/96199
	* cp-tree.h (struct push_nested_class_guard): New.
	* constraint.cc (get_normalized_constraints_from_decl): Use it.

2021-03-04  Jason Merrill  <jason@redhat.com>

	PR c++/95675
	* call.c (build_temp): Wrap a CALL_EXPR in a TARGET_EXPR
	if it didn't get one before.

2021-03-04  Jason Merrill  <jason@redhat.com>

	PR c++/98810
	* pt.c (tsubst_copy) [VIEW_CONVERT_EXPR]: Add const
	to a class non-type template argument that needs it.

2021-02-27  Jason Merrill  <jason@redhat.com>

	PR c++/90333
	* parser.c (cp_parser_lambda_declarator_opt): Accept GNU attributes
	between () and ->.

2021-02-27  Jason Merrill  <jason@redhat.com>

	PR c++/97246
	PR c++/94546
	* pt.c (extract_fnparm_pack): Check DECL_PACK_P here.
	(register_parameter_specializations): Not here.

2021-02-17  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2021-02-17  Patrick Palka  <ppalka@redhat.com>

	PR debug/96997
	PR c++/94034
	* tree.c (build_aggr_init_expr): Revert r10-7718 change.

2021-02-12  Jason Merrill  <jason@redhat.com>

	PR c++/96905
	* pt.c (mark_decl_instantiated): Exit early if consteval.

2021-02-12  Jason Merrill  <jason@redhat.com>

	PR c++/98326
	PR c++/20408
	* cp-gimplify.c (simple_empty_class_p): Don't touch an invisiref
	parm.

2021-02-11  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-02-11  Marek Polacek  <polacek@redhat.com>

	PR c++/95888
	* pt.c (lookup_template_class_1): Pass tf_none to tsubst when looking
	for the partial instantiation.

2021-02-05  Jason Merrill  <jason@redhat.com>

	PR c++/98717
	* constraint.cc (build_concept_check_arguments): Remove assert.
	(build_concept_check): Allow empty args.

2021-02-04  Jason Merrill  <jason@redhat.com>

	PR c++/98802
	* pt.c (deduction_guides_for): Add any_dguides_p parm.
	(do_class_deduction): No aggregate guide if any_dguides_p.

2021-02-02  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2021-02-01  Patrick Palka  <ppalka@redhat.com>

	PR c++/98295
	* constexpr.c (cxx_eval_array_reference): Also set
	new_ctx.object when setting new_ctx.ctor.

2021-02-01  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2021-02-01  Marek Polacek  <polacek@redhat.com>

	PR c++/98355
	* parser.c (cp_parser_has_attribute_expression): Use
	uses_template_parms instead of type_dependent_expression_p.

2021-02-01  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-08-05  Patrick Palka  <ppalka@redhat.com>
		    Jason Merrill  <jason@redhat.com>

	PR c++/96282
	* constexpr.c (cxx_eval_vec_init_1): Truncate ctx->ctor and
	then clear CONSTRUCTOR_NO_CLEARING on each appended element
	initializer if we're initializing a previously zero-initialized
	array object.

2021-01-29  Jakub Jelinek  <jakub@redhat.com>

	PR c++/33661
	PR c++/98847
	* decl.c (cp_finish_decl): For register vars with asmspec in templates
	call set_user_assembler_name and set DECL_HARD_REGISTER.
	* pt.c (tsubst_expr): When instantiating DECL_HARD_REGISTER vars,
	pass asmspec_tree to cp_finish_decl.

2021-01-29  Jakub Jelinek  <jakub@redhat.com>

	PR sanitizer/95693
	* init.c (build_zero_init_1): Revert the 2018-03-06 change to
	return build_zero_cst for reference types.
	* typeck2.c (process_init_constructor_record): Instead call
	build_zero_cst here during error recovery instead of build_zero_init.

2021-01-29  Jakub Jelinek  <jakub@redhat.com>

	PR c++/98672
	* constexpr.c (check_for_return_continue_data): Add break_stmt member.
	(check_for_return_continue): Also look for BREAK_STMT.  Handle
	SWITCH_STMT by ignoring break_stmt from its body.
	(potential_constant_expression_1) <case FOR_STMT>,
	<case WHILE_STMT>: If the condition isn't constant true, check if
	the loop body can contain a return stmt.
	<case SWITCH_STMT>: Adjust check_for_return_continue_data initializer.
	<case IF_STMT>: If recursion with tf_none is successful,
	merge *jump_target from the branches - returns with highest priority,
	breaks or continues lower.  If then branch is potentially constant and
	doesn't return, check the else branch if it could return, break or
	continue.

2021-01-29  Jason Merrill  <jason@redhat.com>

	PR c++/98463
	* constexpr.c (get_or_insert_ctor_field): Add check.
	(cxx_eval_store_expression): Handle discontinuity of refs.

2021-01-29  Jason Merrill  <jason@redhat.com>

	PR c++/97474
	* call.c (type_passed_as): Don't mark invisiref restrict.

2021-01-29  Jason Merrill  <jason@redhat.com>

	PR c++/98642
	* typeck2.c (split_nonconstant_init_1): Don't copy a list-init
	constructor call.

2021-01-29  Jason Merrill  <jason@redhat.com>

	PR c++/63707
	* tree.c (build_vec_init_expr): Don't call build_vec_init_elt
	if we got a CONSTRUCTOR.

2021-01-22  Marek Polacek  <polacek@redhat.com>

	PR c++/98790
	* pt.c (maybe_instantiate_noexcept): Return false if FN is
	error_mark_node.

2021-01-14  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-11-04  Iain Sandoe  <iain@sandoe.co.uk>

	* constexpr.c (potential_constant_expression_1): Handle
	expressions known to be non-constant for Objective-C.

2021-01-09  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2021-01-08  Patrick Palka  <ppalka@redhat.com>

	PR c++/98551
	* constexpr.c (cxx_eval_call_expression): Check CLASS_TYPE_P
	instead of AGGREGATE_TYPE_P before calling replace_result_decl.

2021-01-09  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-07-31  Patrick Palka  <ppalka@redhat.com>

	PR c++/96197
	* constexpr.c (cxx_eval_constant_expression) <case CONST_DECL>:
	Pass false to decl_constant_value and decl_really_constant_value
	so that they don't unshare their result.
	* cp-tree.h (decl_constant_value): New declaration with an added
	bool parameter.
	(decl_really_constant_value): Add bool parameter defaulting to
	true to existing declaration.
	* init.c (constant_value_1): Add bool parameter which controls
	whether to unshare the initializer before returning.  Call
	unshare_expr at most once.
	(scalar_constant_value): Pass true to constant_value_1's new
	bool parameter.
	(decl_really_constant_value): Add bool parameter and forward it
	to constant_value_1.
	(decl_constant_value): Likewise, but instead define a new
	overload with an added bool parameter.

2021-01-06  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-12-08  Jakub Jelinek  <jakub@redhat.com>

	PR c++/98187
	* parser.c (cp_parser_omp_parallel): For parallel master with
	-fopenmp-simd only, just call cp_parser_omp_master instead of
	wrapping it in OMP_PARALLEL.

2021-01-06  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-12-05  Jakub Jelinek  <jakub@redhat.com>

	PR c++/98122
	* constexpr.c (cxx_union_active_member): New function.
	(cxx_fold_indirect_ref_1): Add ctx argument, pass it through to
	recursive call.  Handle UNION_TYPE.
	(cxx_fold_indirect_ref): Add ctx argument, pass it to recursive calls
	and cxx_fold_indirect_ref_1.
	(cxx_eval_indirect_ref): Adjust cxx_fold_indirect_ref calls.

2021-01-06  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-12-01  Jakub Jelinek  <jakub@redhat.com>

	PR c++/98072
	* parser.c (cp_parser_omp_depobj): Suppress location wrappers when
	parsing depend clause.

2021-01-05  Marek Polacek  <polacek@redhat.com>

	PR c++/82099
	* pt.c (resolve_overloaded_unification): Call
	maybe_instantiate_noexcept after instantiating the function
	decl.

2021-01-05  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2020-10-28  Marek Polacek  <polacek@redhat.com>

	PR c++/96675
	PR c++/96742
	* pt.c (tsubst_copy_and_build): Call value_dependent_expression_p or
	type_dependent_expression_p instead of type_dependent_expression_p_push.
	But only call value_dependent_expression_p for expressions that are
	potential_constant_expression.

2021-01-05  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2020-12-02  Marek Polacek  <polacek@redhat.com>

	PR c++/97975
	* constexpr.c (fold_non_dependent_init): Add a tree parameter.
	Use it.
	* cp-tree.h (fold_non_dependent_init): Add a tree parameter with
	a default value.
	* typeck2.c (store_init_value): Call fold_non_dependent_expr
	only when checking the initializer for constexpr variables.
	Call fold_non_dependent_init instead of maybe_constant_init.

2021-01-05  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2020-12-07  Marek Polacek  <polacek@redhat.com>

	PR c++/98043
	* decl.c (pop_switch): If SWITCH_STMT_TYPE is a scoped enum type,
	set it to the type of SWITCH_STMT_COND.

2021-01-05  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2020-12-08  Marek Polacek  <polacek@redhat.com>

	PR c++/98103
	* constexpr.c (cxx_eval_dynamic_cast_fn): If the evaluating of vtable
	yields a null pointer, give an error and return.  Use objtype.

2021-01-05  Marek Polacek  <polacek@redhat.com>

	PR c++/97427
	* constexpr.c (cxx_set_object_constness): New function.
	(cxx_eval_call_expression): Set new_obj for destructors too.
	Call cxx_set_object_constness to set/unset TREE_READONLY of
	the object under construction/destruction.

2021-01-03  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-10-19  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/97438
	* coroutines.cc (struct coroutine_info): Add a field to
	record that we emitted a promise type error.
	(coro_promise_type_found_p): Check for the case that the
	promise type contains both return_void and return_value.
	Emit an error if so, with information about the wrong
	type methods.

2020-12-23  Jason Merrill  <jason@redhat.com>

	PR c++/98332
	* constexpr.c (unshare_constructor): Check for NULL.
	(cxx_eval_vec_init_1): Always exit early if non-constant.

2020-12-23  Jason Merrill  <jason@redhat.com>

	PR c++/90254
	PR c++/93711
	* cp-tree.h (unsafe_return_slot_p): Declare.
	* call.c (is_base_field_ref): Rename to unsafe_return_slot_p.
	(build_over_call): Check unsafe_return_slot_p.
	(build_special_member_call): Likewise.
	* init.c (expand_default_init): Likewise.
	* typeck2.c (split_nonconstant_init_1): Likewise.

2020-12-16  Nathan Sidwell  <nathan@acm.org>

	* parser.c (cp_parser_elaborated_type_specifier): Test
	BOUND_TEMPLATE_TEMPLATE_PARM before checking for instantiation.

2020-12-10  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-07-30  Patrick Palka  <ppalka@redhat.com>

	PR c++/64194
	* pt.c (resolve_overloaded_unification): If the function
	template specialization has a placeholder return type,
	then instantiate it before attempting unification.

2020-12-09  Jason Merrill  <jason@redhat.com>

	PR c++/93083
	* pt.c (convert_template_argument): Handle equivalent placeholders.
	(do_class_deduction): Look through EXPR_PACK_EXPANSION, too.

2020-12-02  Richard Sandiford  <richard.sandiford@arm.com>

	Backported from master:
	2020-11-23  Richard Sandiford  <richard.sandiford@arm.com>

	PR c++/97904
	* pt.c (tsubst): Use verify_type_context to check the type
	of an array element.

2020-11-26  Thomas Schwinge  <thomas@codesourcery.com>

	Backported from master:
	2020-11-26  Thomas Schwinge  <thomas@codesourcery.com>

	* parser.c (cp_parser_omp_var_list_no_open): Assert that array
	section's 'low_bound', 'length' are not location wrapper nodes.
	(cp_parser_oacc_all_clauses, cp_parser_oacc_cache): Instantiate
	'auto_suppress_location_wrappers'.

2020-11-25  Thomas Schwinge  <thomas@codesourcery.com>

	Backported from master:
	2020-11-25  Thomas Schwinge  <thomas@codesourcery.com>

	* pt.c (tsubst_omp_clauses): Handle 'OMP_CLAUSE__CACHE_'.
	(tsubst_expr): Handle 'OACC_CACHE'.

2020-11-24  Jason Merrill  <jason@redhat.com>

	PR c++/96805
	PR c++/96199
	* pt.c (tsubst_aggr_type): Don't build a TYPENAME_TYPE when
	entering_scope.
	(tsubst_template_decl): Use tsubst_aggr_type.

2020-11-12  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-11-12  Jakub Jelinek  <jakub@redhat.com>

	PR c++/97790
	* constexpr.c (cxx_eval_constant_expression) <case CLEANUP_POINT_EXPR,
	case TRY_FINALLY_EXPR, case CLEANUP_STMT>: Don't pass jump_target to
	cxx_eval_constant_expression when evaluating the cleanups.

2020-11-12  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-11-10  Jakub Jelinek  <jakub@redhat.com>

	PR c/97748
	* cvt.c (convert_to_void): Check (complain & tf_warning) in the outer
	if rather than twice times in the inner one.  Use warn_if_unused_value.
	Formatting fix.

2020-11-12  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-11-06  Jakub Jelinek  <jakub@redhat.com>

	PR c++/67453
	* decl.c (duplicate_decls): Propagate DECL_ATTRIBUTES and
	DECL_PRESERVE_P from olddecl to its clones if any.

2020-11-12  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-11-03  Jakub Jelinek  <jakub@redhat.com>

	PR c++/97663
	* parser.c (cp_parser_init_declarator): Don't try to parse
	C++17 deduction guides if there are any type specifiers even when
	type is NULL.

2020-10-30  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-10-29  Patrick Palka  <ppalka@redhat.com>

	PR c++/97412
	* constraint.cc (normalize_concept_check): Don't call
	tsubst_template_args when 'args' is NULL.

2020-10-28  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-10-28  Patrick Palka  <ppalka@redhat.com>

	PR c++/95132
	* decl2.c (mark_used): Move up the constraints_satisfied_p check
	so that we check constraints before calling maybe_instantiate_decl.

2020-10-24  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2020-10-24  Marek Polacek  <polacek@redhat.com>

	PR c++/96241
	* constexpr.c (cxx_eval_array_reference): Set up ctx->ctor if we
	are initializing an aggregate.  Call free_constructor on the new
	CONSTRUCTOR if it isn't returned from cxx_eval_constant_expression.

2020-10-22  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-10-22  Patrick Palka  <ppalka@redhat.com>

	PR c++/97328
	* constexpr.c (init_subob_ctx): Don't punt on RANGE_EXPR
	indexes, instead build a sub-aggregate initialization context
	with no subobject.

2020-10-20  Marek Polacek  <polacek@redhat.com>

	* pt.c (tsubst_copy_and_build): Use cxx2a.

2020-10-20  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2020-10-07  Marek Polacek  <polacek@redhat.com>

	PR c++/97010
	* pt.c (tsubst_copy_and_build) <case TEMPLATE_ID_EXPR>: Call
	tsubst_copy_and_build explicitly instead of using the RECUR macro.
	Handle a TEMPLATE_ID_EXPR with an IDENTIFIER_NODE as its operand.
	<case CALL_EXPR>: Perform ADL for a TEMPLATE_ID_EXPR with an
	IDENTIFIER_NODE as its operand.

2020-10-16  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-10-05  Richard Biener  <rguenther@suse.de>
		    Jakub Jelinek  <jakub@redhat.com>

	PR c++/97197
	* error.c (dump_expr): Handle TARGET_MEM_REF.

2020-10-13  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-10-08  Patrick Palka  <ppalka@redhat.com>

	PR c++/96229
	* parser.c (cp_parser_class_specifier_1): Move call to
	associate_classtype_constraints from here to ...
	(cp_parser_class_head): ... here.
	* pt.c (is_compatible_template_arg): Correct documentation to
	say "argument is _no_ more constrained than the parameter".

2020-10-08  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-10-07  Patrick Palka  <ppalka@redhat.com>

	PR c++/88115
	PR libstdc++/97273
	* tree.c (cp_tree_equal) <case ALIGNOF_EXPR>: Return false if
	ALIGNOF_EXPR_STD_P differ.

2020-10-05  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-10-01  Jakub Jelinek  <jakub@redhat.com>

	PR c++/96994
	* call.c (build_over_call): If obj_arg is non-NULL, return INIT_EXPR
	setting obj_arg to call.

2020-10-05  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-10-01  Jakub Jelinek  <jakub@redhat.com>

	PR c++/97195
	* constexpr.c (cxx_eval_call_expression): Don't VERIFY_CONSTANT the
	second argument.

2020-10-05  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-09-22  Jakub Jelinek  <jakub@redhat.com>

	PR c++/97145
	* constexpr.c (cxx_eval_builtin_function_call): Return void_node for
	calls to __sanitize_ptr_{sub,cmp} builtins.

2020-09-11  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-09-03  Jakub Jelinek  <jakub@redhat.com>

	PR c++/96901
	* constexpr.c (fundef_copies_table): Change type from
	hash_map<tree, tree> * to decl_tree_map *.

2020-09-11  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-09-03  Jakub Jelinek  <jakub@redhat.com>

	PR c++/96862
	* constexpr.c (cxx_eval_outermost_constant_expr): Temporarily disable
	flag_rounding_math during manifestly constant evaluation.

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

	Backported from master:
	2020-09-09  Marek Polacek  <polacek@redhat.com>

	PR c++/95164
	* decl.c (reshape_init_r): When initializing an aggregate member
	with an initializer from an initializer-list, also consider
	COMPOUND_LITERAL_P.

2020-08-25  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2020-08-10  Jakub Jelinek  <jakub@redhat.com>

	PR c++/96497
	* constexpr.c (cxx_eval_binary_expression): For SPACESHIP_EXPR, tail
	call cxx_eval_constant_expression after genericize_spaceship to avoid
	undesirable further VERIFY_CONSTANT.

2020-08-24  Jason Merrill  <jason@redhat.com>

	PR c++/95428
	* optimize.c (populate_clone_array): Revert PR70462 change.
	(maybe_clone_body): Likewise.

2020-08-18  Jason Merrill  <jason@redhat.com>

	PR c++/96199
	* pt.c (maybe_dependent_member_ref): New.
	(tsubst_copy) [CONST_DECL]: Use it.
	[VAR_DECL]: Likewise.
	(tsubst_aggr_type): Handle nested type.

2020-08-13  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-08-10  Patrick Palka  <ppalka@redhat.com>

	* pt.c (resolve_overloaded_unification): Drop functions with
	unsatisfied constraints.
	(resolve_nondeduced_context): Likewise.

2020-08-11  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-07-30  Patrick Palka  <ppalka@redhat.com>

	PR c++/96106
	* pt.c (reduce_template_parm_level): Propagate DECL_VIRTUAL_P
	from the original TEMPLATE_PARM_DECL to the new lowered one.

2020-08-11  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2020-07-30  Patrick Palka  <ppalka@redhat.com>

	PR c++/96164
	* constraint.cc (constraints_satisfied_p): Return true if
	!flags_concepts.
	* pt.c (do_type_instantiation): Update a paragraph taken from
	[temp.explicit] to reflect the latest specification.  Don't
	instantiate a member with unsatisfied constraints.

2020-08-04  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2020-08-04  Marek Polacek  <polacek@redhat.com>

	PR c++/96082
	* parser.c (cp_parser_elaborated_type_specifier): Allow
	'template' following ::.

2020-07-29  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-07-16  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95591
	PR c++/95599
	PR c++/95823
	PR c++/95824
	PR c++/95895
	* coroutines.cc (struct coro_ret_data): Delete.
	(coro_maybe_expand_co_return): Delete.
	(co_return_expander): Delete.
	(expand_co_returns): Delete.
	(co_await_find_in_subtree): Remove unused name.
	(build_actor_fn): Remove unused parm, remove handling
	for co_return expansion.
	(register_await_info): Demote duplicate info message to a
	warning.
	(coro_make_frame_entry): Move closer to use site.
	(struct susp_frame_data): Add fields for final suspend label
	and a flag to indicate await expressions with initializers.
	(captures_temporary): Delete.
	(register_awaits): Remove unused code, update comments.
	(find_any_await): New.
	(tmp_target_expr_p): New.
	(struct interesting): New.
	(find_interesting_subtree): New.
	(struct var_nest_node): New.
	(flatten_await_stmt): New.
	(handle_nested_conditionals): New.
	(process_conditional): New.
	(replace_statement_captures): Rename to...
	(maybe_promote_temps): ... this.
	(maybe_promote_captured_temps): Delete.
	(analyze_expression_awaits): Check for await expressions with
	initializers.  Simplify handling for truth-and/or-if.
	(expand_one_truth_if): Simplify (map cases that need expansion
	to COND_EXPR).
	(await_statement_walker): Handle CO_RETURN_EXPR. Simplify the
	handling for truth-and/or-if expressions.
	(register_local_var_uses): Ensure that we create names in the
	implementation namespace.
	(morph_fn_to_coro): Add final suspend label to suspend frame
	callback data and remove it from the build_actor_fn call.

2020-07-29  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-05  Iain Sandoe  <iain@sandoe.co.uk>

	* cp-tree.def (CO_RETURN_EXPR): Correct the class
	to use tcc_statement.

2020-07-23  Release Manager

	* GCC 10.2.0 released.

2020-07-15  Richard Sandiford  <richard.sandiford@arm.com>

	PR target/95726
	* typeck.c (structural_comptypes): When comparing template
	specializations, differentiate between vectors that have and
	do not have an "Advanced SIMD type" attribute.

2020-07-14  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2020-07-14  Marek Polacek  <polacek@redhat.com>

	PR c++/95789
	PR c++/96104
	PR c++/96179
	* call.c (convert_like_real_1): Renamed from convert_like_real.
	(convert_like_real): New wrapper for convert_like_real_1.

2020-07-13  Julian Brown  <julian@codesourcery.com>

	Backported from master:
	2020-07-09  Julian Brown  <julian@codesourcery.com>
		    Thomas Schwinge  <thomas@codesourcery.com>

	PR middle-end/95270
	* semantics.c (finish_omp_clauses): Likewise.

2020-07-13  Martin Sebor  <msebor@redhat.com>

	PR c++/96063
	* parser.c (class_decl_loc_t::diag_mismatched_tags): Print notes only
	if warning_at returns nonzero.

2020-07-13  Marek Polacek  <polacek@redhat.com>

	Backported from master:
	2020-07-13  Marek Polacek  <polacek@redhat.com>

	PR c++/96077
	* parser.c (cp_parser_enum_specifier): Commit to tentative parse
	after we've seen an opening brace.

2020-07-10  Jason Merrill  <jason@redhat.com>

	PR c++/96105
	PR c++/96052
	PR c++/95976
	* class.c (check_field_decls): An array of empty classes is not an
	empty data member.
	(layout_empty_base_or_field): Handle explicit alignment.
	Fix union handling.

2020-07-01  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-30  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (expand_one_await_expression): Remove
	code dealing with initial suspend.
	(build_actor_fn): Remove code special-casing initial
	and final suspend. Handle the final suspend and marking
	of the coroutine as done.
	(coro_rewrite_function_body): New.
	(bind_expr_find_in_subtree): Remove.
	(coro_body_contains_bind_expr_p): Remove.
	(morph_fn_to_coro): Split the rewrite of the original
	function into coro_rewrite_function_body and call it.

2020-07-01  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-30  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (morph_fn_to_coro): Remove trailing
	space in a diagnostic.

2020-06-30  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-28  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95711
	* coroutines.cc (register_local_var_uses): Skip past
	namespace decls.

2020-06-30  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-27  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95736
	* coroutines.cc (get_awaitable_var): New helper.
	(build_co_await): Check more carefully before
	copying an awaitable.
	(expand_one_await_expression): No initializer
	is required when the awaitable is not a temp.
	(register_awaits): Remove handling that is now
	completed when the await expression is built.

2020-06-30  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-27  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (morph_fn_to_coro): Diagnose unavailable
	get_return_object_on_allocation_failure.

2020-06-29  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95519
	* coroutines.cc (struct coroutine_info):Add a field
	to hold computed p.return_void expressions.
	(coro_build_promise_expression): New.
	(get_coroutine_return_void_expr): New.
	(finish_co_yield_expr): Build the promise expression
	using coro_build_promise_expression.
	(finish_co_return_stmt): Likewise.
	(build_init_or_final_await): Likewise.
	(morph_fn_to_coro): Likewise, for several cases.

2020-06-29  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-26  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (morph_fn_to_coro): Handle error
	returns in building g-r-o-o-a-f expressions.

2020-06-28  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-24  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95518
	PR c++/95813
	* coroutines.cc (act_des_fn): Copy function
	attributes onto the outlined coroutine helpers.

2020-06-25  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-23  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95477
	* coroutines.cc (morph_fn_to_coro): Apply a cleanup to
	the get return object when the DTOR is non-trivial.

2020-06-24  Jason Merrill  <jason@redhat.com>

	Backported from master:
	2020-06-24  Jason Merrill  <jason@redhat.com>

	PR c++/95719
	* call.c (build_over_call): Look up the overrider in base_binfo.
	* class.c (lookup_vfn_in_binfo): Look through BINFO_PRIMARY_P.

2020-06-22  Jason Merrill  <jason@redhat.com>

	* call.c (joust): Only compare constraints for non-template
	candidates with matching parameters.
	* pt.c (tsubst_pack_expansion): Fix getting a type parameter
	pack.
	(more_specialized_fn): Only compare constraints for candidates with
	matching parameters.

2020-06-22  Jason Merrill  <jason@redhat.com>

	* cp-tree.h (copy_fndecl_with_name): Declare.
	* class.c (copy_fndecl_with_name): Copy from build_clone.
	(add_implicitly_declared_members): Add op== to TYPE_FIELDS.
	* method.c (implicitly_declare_fn): Use copy_fndecl_with_name.
	* decl.c (grokfndecl): Add initialized parm.
	(grokdeclarator): Pass it down.

2020-06-21  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from master:
	2020-06-20  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95505
	* coroutines.cc (morph_fn_to_coro): Update handling of
	get-return-object-on-allocation-fail and diagnose missing
	std::nothrow.

2020-06-19  Jason Merrill  <jason@redhat.com>

	* method.c (early_check_defaulted_comparison): Allow defaulting
	comparison outside class.  Complain if non-member operator isn't a
	friend.

2020-06-19  Jason Merrill  <jason@redhat.com>

	* method.c (early_check_defaulted_comparison): Check for &&.
	(build_comparison_op): Allow empty union.  Diagnose non-category
	type.
	(common_comparison_type): Remove handling for non-category type.

2020-06-19  Jason Merrill  <jason@redhat.com>

	* call.c (build_new_op_1): Don't look for a CALL_EXPR when
	calling a consteval function.

2020-06-17  Marek Polacek  <polacek@redhat.com>

	PR c++/95508
	* constexpr.c (maybe_fold_non_dependent_expr): New.
	* cp-tree.h (maybe_fold_non_dependent_expr): Declare.
	* typeck.c (cp_build_array_ref): Call maybe_fold_non_dependent_expr
	instead of maybe_constant_value.

2020-06-14  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (instantiate_coro_traits): Pass a reference
	to lambda closure objects to traits instantiation.
	(morph_fn_to_coro): Likewise for promise parameter
	preview and allocator lookup.

2020-06-14  Jakub Jelinek  <jakub@redhat.com>

	PR c++/95328
	* decl.c (cp_finish_decomp): Call complete_type before checking
	COMPLETE_TYPE_P.

2020-06-14  Jakub Jelinek  <jakub@redhat.com>

	PR c++/95197
	* cp-gimplify.c: Include omp-general.h.
	(cp_genericize_r) <case OMP_DISTRIBUTE>: For class iteration
	variables in composite distribute parallel for, instantiate copy
	ctor of their types.

2020-06-13  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95440
	* call.c (add_candidates): Use vec_safe_length() for
	testing the arguments list.
	(build_new_method_call_1): Use vec_safe_is_empty() when
	checking for an empty args list.

2020-06-13  Patrick Palka  <ppalka@redhat.com>

	PR c++/93467
	* constraint.cc (associate_classtype_constraints): If there is a
	discrepancy between the current template depth and the template
	depth of the original declaration, then adjust the template
	parameter depth within the current constraints appropriately.
	* pt.c (tsubst_friend_class): Substitute into and set the
	constraints on the injected declaration.

2020-06-12  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95350
	* coroutines.cc (struct param_info): Remove rv_ref field.
	(build_actor_fn): Remove specifial rvalue ref handling.
	(morph_fn_to_coro): Likewise.

2020-06-11  Marek Polacek  <polacek@redhat.com>

	PR c++/95560
	* name-lookup.c (check_local_shadow): Check if types are
	non-null before calling same_type_p.

2020-06-11  Marek Polacek  <polacek@redhat.com>

	PR c++/95066
	* decl.c (duplicate_decls): Set DECL_HAS_DEPENDENT_EXPLICIT_SPEC_P.

2020-06-11  Marek Polacek  <polacek@redhat.com>

	PR c++/94937
	* cvt.c (cp_get_fndecl_from_callee): Return NULL_TREE if the function
	type is not INDIRECT_TYPE_P.
	* decl.c (omp_declare_variant_finalize_one): Call
	cp_get_callee_fndecl_nofold instead of looking for the function decl
	manually.

2020-06-11  Marek Polacek  <polacek@redhat.com>

	PR c++/95344
	* cp-gimplify.c (cp_fold) <case MODIFY_EXPR>: Don't set
	TREE_THIS_VOLATILE here.
	(cp_fold): Set it here along with TREE_NO_WARNING.

2020-06-11  Marek Polacek  <polacek@redhat.com>

	PR c++/94955
	* typeck.c (cp_build_binary_op): Use fold_for_warn instead of
	cp_fold_rvalue.

2020-06-11  Marek Polacek  <polacek@redhat.com>

	PR c++/90915
	* parser.c (cp_parser_has_attribute_expression): Sorry on a
	type-dependent argument.

2020-06-11  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95137
	* coroutines.cc (expand_one_await_expression): Build separate
	DTOR trees for the awaitable object on the destroy and resume
	paths.

2020-06-10  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95346
	* coroutines.cc (morph_fn_to_coro): Ensure that the get-
	return-object is constructed correctly; When it is not the
	final return value, pass it to the CTOR of the return type
	as an rvalue, per the standard comment.

2020-06-10  Marek Polacek  <polacek@redhat.com>

	PR c++/95562
	* parser.c (cp_parser_direct_declarator): Clear
	CP_PARSER_FLAGS_DELAY_NOEXCEPT if the declarator kind is not
	cdk_id.

2020-06-09  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95345
	* coroutines.cc (finish_co_await_expr): Revise to allow for
	parameter packs.
	(finish_co_yield_expr): Likewise.

2020-06-07  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95050
	* coroutines.cc (build_co_await): Wrap the co_await expression
	in a TARGET_EXPR, where needed.
	(finish_co_yield_expr): Likewise.

2020-06-06  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94817
	PR c++/94829
	PR c++/95087
	* coroutines.cc (morph_fn_to_coro): Set unformed outline
	functions to error_mark_node.  For early error returns suppress
	warnings about missing ramp return values.  Fix reinstatement
	of the function body on pre-existing initial error.  If we see
	an early fatal error, drop the erroneous function body.
	* decl.c (finish_function): Use the normal error path for fails
	in the ramp function, do not try to compile the helpers if the
	transform fails.

2020-06-04  Jason Merrill  <jason@redhat.com>

	PR c++/93310
	* constexpr.c (cxx_eval_constant_expression) [OBJ_TYPE_REF]:
	Evaluate OBJ_TYPE_REF_EXPR.

2020-06-04  Jason Merrill  <jason@redhat.com>

	PR c++/95158
	* class.c (lookup_vfn_in_binfo): New.
	* call.c (build_over_call): Use it.
	* cp-tree.h (resolves_to_fixed_type_p): Add default argument.
	(lookup_vfn_in_binfo): Declare.

2020-06-04  Patrick Palka  <ppalka@redhat.com>

	* pt.c (process_partial_specialization): Pass the full set of
	generic template arguments to strictly_subsumes.

2020-06-04  Patrick Palka  <ppalka@redhat.com>

	PR c++/92103
	* pt.c (most_specialized_partial_spec): Reorganize the loop over
	DECL_TEMPLATE_SPECIALIZATIONS.  Check constraints_satisfied_p on
	the original template declaration, not on the tsubsted one.

2020-06-02  Patrick Palka  <ppalka@redhat.com>

	PR c++/92633
	PR c++/92838
	* pt.c (tsubst_function_decl): Don't do set_constraints when
	regenerating a lambda.
	(tsubst_lambda_expr): Substitute into the lambda's constraints
	and do set_constraints here.

2020-06-02  Patrick Palka  <ppalka@redhat.com>

	PR c++/95020
	* constraint.cc (tsubst_requires_expr): Produce a new
	requires-expression when processing_template_decl, even if
	template arguments are not dependent.

2020-05-30  Patrick Palka  <ppalka@redhat.com>

	PR c++/95386
	* constraint.cc (satisfaction_value): Relax to accept any
	INTEGER_CST that satisfies integer_zerop or integer_onep.

2020-05-30  Patrick Palka  <ppalka@redhat.com>

	PR c++/92652
	PR c++/93698
	PR c++/94128
	* parser.c (cp_parser_requires_clause_expression): Temporarily
	increment processing_template_decl only if it is 0.
	(cp_parser_constraint_expression): Likewise.
	(cp_parser_requires_expression): Likewise.

2020-05-30  Patrick Palka  <ppalka@redhat.com>

	PR c++/95241
	* constexpr.c (get_or_insert_ctor_field): Add limited support
	for RANGE_EXPR index lookups.

2020-05-30  Patrick Palka  <ppalka@redhat.com>
	    Jason Merrill  <jason@redhat.com>

	PR c++/95181
	* class.c (add_method): Let special member function templates
	coexist if they are not equivalently constrained, or in a class
	template.

2020-05-30  Jason Merrill  <jason@redhat.com>

	PR c++/95371
	* pt.c (process_template_parm): Set DECL_TEMPLATE_INFO
	on the DECL_TEMPLATE_RESULT.

2020-05-27  Jason Merrill  <jason@redhat.com>

	PR c++/95319
	* decl.c (reshape_init_array_1): Don't reuse in overload context.

2020-05-27  Jason Merrill  <jason@redhat.com>

	* call.c (build_new_op_1): Suppress
	warn_zero_as_null_pointer_constant across comparison of <=> result
	to 0.

2020-05-27  Jason Merrill  <jason@redhat.com>

	PR c++/95222
	* decl.c (grokdeclarator): Don't shift attributes in TYPENAME
	context.

2020-05-25  Jason Merrill  <jason@redhat.com>

	PR c++/90212
	* constexpr.c (potential_constant_expression_1): In a lambda
	function, consider a captured variable directly.

2020-05-25  Jason Merrill  <jason@redhat.com>

	PR c++/90479
	* init.c (get_nsdmi): Don't push_to_top_level for a local class.

2020-05-25  Jason Merrill  <jason@redhat.com>

	PR c++/91529
	* decl.c (cp_finish_decl): Also clear TREE_READONLY if
	-fmerge-all-constants.

2020-05-25  Jason Merrill  <jason@redhat.com>

	PR c++/93822
	* pt.c (tsubst_decl): Make sure DECL_VALUE_EXPR continues to have
	the same type as the variable.

2020-05-24  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from mainline
	2020-05-16  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (finish_co_return_stmt): Implement rules
	from [class.copy.elision] /3.

2020-05-10  Iain Sandoe  <iain@sandoe.co.uk>

	Backported from mainline
	2020-05-08  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/95003
	* coroutines.cc (build_actor_fn): Ensure that bind scopes
	are marked as having side-effects where necessary.
	(replace_statement_captures): Likewise.
	(morph_fn_to_coro): Likewise.

2020-05-08  Marek Polacek  <polacek@redhat.com>

	Backported from mainline
	2020-05-01  Marek Polacek  <polacek@redhat.com>

	PR c++/94885
	* typeck2.c (process_init_constructor_record): Return PICFLAG_ERRONEOUS
	if an initializer element was erroneous.

2020-05-07  Marek Polacek  <polacek@redhat.com>
	
	Backported from mainline
	2020-05-06  Marek Polacek  <polacek@redhat.com>

	PR c++/94938
	* pt.c (tsubst_copy_and_build): Call type_dependent_expression_p_push
	instead of uses_template_parms.  Move the warning_sentinels after the
	RECURs.

2020-05-07  Jakub Jelinek  <jakub@redhat.com>

	Backported from mainline
	2020-05-06  Jakub Jelinek  <jakub@redhat.com>

	PR c++/94951
	* typeck.c (cp_strict_aliasing_warning): New function.
	(cp_build_indirect_ref_1, build_reinterpret_cast_1): Use
	it instead of strict_aliasing_warning.

	PR c++/94907
	* method.c (defaulted_late_check): Don't call synthesize_method
	on constexpr sfk_comparison if it has been called on it already.

2020-05-07  Release Manager

	* GCC 10.1.0 released.

2020-05-06  Nathan Sidwell  <nathan@acm.org>

	PR c++/94946
	* decl.c (grokdeclarator): Don't splice template attributes in
	parm context -- they can apply to the parm.

2020-04-30  Jason Merrill  <jason@redhat.com>
	    Nathan Sidwell  <nathan@acm.org>

	PR c++/94827
	* constraint.cc (map_arguments): If ARGS is null, it's a
	self-mapping of parms.
	(finish_nested_requirement): Do not pass argified
	current_template_parms to normalization.
	(tsubst_nested_requirement): Don't assert no template parms.

2020-04-30  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94886
	* coroutines.cc (transform_local_var_uses): Defer walking
	the DECL_INITIALs of BIND_EXPR vars until all the frame
	allocations have been made.

2020-04-30  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94883
	* coroutines.cc (register_awaits): Update target
	expressions for awaitable and suspend handle
	initializers.

2020-04-30  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94879
	* coroutines.cc (build_co_await): Account for variables
	with DECL_VALUE_EXPRs.
	(captures_temporary): Likewise.
	(register_awaits): Likewise.

2020-04-29  Patrick Palka  <ppalka@redhat.com>

	PR c++/94830
	* pt.c (find_template_parameter_info::parm_list): New field.
	(keep_template_parm): Use the new field to build up the
	parameter list here instead of ...
	(find_template_parameters): ... here.  Return ftpi.parm_list.

2020-04-29  Jakub Jelinek  <jakub@redhat.com>

	PR target/94707
	* class.c (build_base_field): Set DECL_FIELD_ABI_IGNORED on C++17 empty
	base artificial FIELD_DECLs.
	(layout_class_type): Set DECL_FIELD_ABI_IGNORED on empty class
	field_poverlapping_p FIELD_DECLs.

2020-04-29  Patrick Palka  <ppalka@redhat.com>

	PR c++/94819
	* constraint.cc (satisfy_declaration_constraints): Use saved_t
	instead of t as the key to decl_satisfied_cache.

	PR c++/94808
	* error.c (print_requires_expression_info): Print the dependent
	form of the parameter list with its template parameter mapping,
	rather than printing the substituted form.

2020-04-28  Jason Merrill  <jason@redhat.com>

	PR c++/94583
	* decl.c (use_eh_spec_block): Check nothrow type after
	DECL_DEFAULTED_FN.
	* pt.c (maybe_instantiate_noexcept): Call synthesize_method for
	DECL_MAYBE_DELETED fns here.
	* decl2.c (mark_used): Not here.
	* method.c (get_defaulted_eh_spec): Reject DECL_MAYBE_DELETED here.

2020-04-28  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94760
	* coroutines.cc (instantiate_coro_traits): Pass a reference to
	object type rather than a pointer type for 'this', for method
	coroutines.
	(struct param_info): Add a field to hold that the parm is a lambda
	closure pointer.
	(morph_fn_to_coro): Check for lambda closure pointers in the
	args.  Use a reference to *this when building the args list for the
	promise allocator lookup.

2020-04-28  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94759
	* coroutines.cc (coro_promise_type_found_p): Do not
	exclude non-classes here (this needs to be handled in the
	coroutine header).
	(morph_fn_to_coro):  Allow for the case where the coroutine
	returns void.

2020-04-27  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94701
	* coroutines.cc (struct local_var_info): Add fields for static
	variables and those with DECL_VALUE_EXPR redirection.
	(transform_local_var_uses): Skip past typedefs and static vars
	and then account for redirected variables.
	(register_local_var_uses): Likewise.

2020-04-27  Jason Merrill  <jason@redhat.com>

	PR c++/90750
	PR c++/79585
	* decl.c (grokdeclarator): Move dependent attribute to decl.
	* decl2.c (splice_template_attributes): No longer static.

2020-04-27  Patrick Palka  <ppalka@redhat.com>

	PR c++/94772
	* constexpr.c (cxx_eval_call_expression): Don't set new_obj if we're
	evaluating the target constructor of a delegating constructor.
	(cxx_eval_store_expression): Don't set TREE_READONLY if the LHS of the
	INIT_EXPR is '*this'.

2020-04-26  Marek Polacek  <polacek@redhat.com>

	PR c++/90320
	* call.c (struct conversion): Add copy_init_p.
	(standard_conversion): Set copy_init_p in ck_base and ck_rvalue
	if FLAGS demands LOOKUP_ONLYCONVERTING.
	(convert_like_real) <case ck_base>: If copy_init_p is set, or
	LOOKUP_ONLYCONVERTING into FLAGS.

2020-04-26  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94752
	* coroutines.cc (morph_fn_to_coro): Ensure that
	unnamed function params have a usable and distinct
	frame field name.

2020-04-24  Jason Merrill  <jason@redhat.com>

	PR c++/94583
	* decl.c (redeclaration_error_message): Reject defaulted comparison
	operator that has been previously declared.

2020-04-25  Patrick Palka  <ppalka@redhat.com>

	* parser.c (cp_parser_diagnose_invalid_type_name): Suggest enabling
	concepts if the invalid identifier is 'requires'.

2020-04-25  Jakub Jelinek  <jakub@redhat.com>

	PR c++/94742
	* semantics.c (finish_call_expr): When looking if all overloads
	are noreturn, use STRIP_TEMPLATE to look through TEMPLATE_DECLs.

2020-04-24  Martin Liska  <mliska@suse.cz>

	* coroutines.cc: Fix compilation error for release checking
	where we miss declaration of ‘coro_body_contains_bind_expr_p’.

2020-04-23  Patrick Palka  <ppalka@redhat.com>

	* tree.c (zero_init_expr_p): Use uses_template_parms instead of
	dependent_type_p.

	PR c++/94645
	* pt.c (template_class_depth): Walk into the DECL_FRIEND_CONTEXT of a
	friend declaration rather than into its CP_DECL_CONTEXT.

2020-04-23 Iain Sandoe <iain@sandoe.co.uk>

	PR c++/94288
	* coroutines.cc (await_statement_expander): Simplify cases.
	(struct susp_frame_data): Add fields for truth and/or if
	cases, rename one field.
	(analyze_expression_awaits): New.
	(expand_one_truth_if): New.
	(add_var_to_bind): New helper.
	(coro_build_add_if_not_cond_break): New helper.
	(await_statement_walker): Handle conditional expressions,
	handle expansion of truth-and/or-if cases.
	(bind_expr_find_in_subtree): New, checking-only.
	(coro_body_contains_bind_expr_p): New, checking-only.
	(morph_fn_to_coro): Ensure that we have a top level bind
	expression.

2020-04-22  Jonathan Wakely  <jwakely@redhat.com>

	PR translation/94698
	* class.c (check_field_decls): Change "define" to "declare" in
	-Weffc++ diagnostics.

2020-04-22  Patrick Palka  <ppalka@redhat.com>

	PR c++/94719
	PR c++/94549
	* constraint.cc (satisfy_declaration_constraints): If the inherited
	constructor points to an instantiation of a constructor template,
	remember and use its attached template arguments.

2020-04-22  Jonathan Wakely  <jwakely@redhat.com>

	PR translation/94698
	* class.c (check_field_decls): Change "override" to "define" in
	-Weffc++ diagnostics.

2020-04-22 Iain Sandoe <iain@sandoe.co.uk>

	PR c++/94682
	* coroutines.cc (struct param_info): Add a field to note that
	the param is 'this'.
	(morph_fn_to_coro): Convert this to a reference before using it
	in the promise parameter preview.

2020-04-22  Jason Merrill  <jason@redhat.com>

	PR c++/94546
	* pt.c (register_parameter_specializations): If the instantiation is
	still a parameter pack, don't wrap it in a NONTYPE_ARGUMENT_PACK.
	(tsubst_pack_expansion, tsubst_expr): Adjust.

2020-04-22  Martin Sebor  <msebor@redhat.com>
	    Jason Merrill  <jason@redhat.com>

	PR c++/94510
	* decl.c (reshape_init_array_1): Avoid stripping redundant trailing
	zero initializers...
	* mangle.c (write_expression): ...and handle them here even for
	pointers to members by calling zero_init_expr_p.
	* cp-tree.h (zero_init_expr_p): Declare.
	* tree.c (zero_init_expr_p): Define.
	(type_initializer_zero_p): Remove.
	* pt.c (tparm_obj_values): New hash_map.
	(get_template_parm_object): Store to it.
	(tparm_object_argument): New.

2020-04-22  Patrick Palka  <ppalka@redhat.com>

	PR c++/67825
	* constraint.cc (diagnose_valid_expression): Check convert_to_void here
	as well as in tsubst_valid_expression_requirement.

2020-04-21  Patrick Palka  <ppalka@redhat.com>

	PR c++/94549
	* constraint.cc (satisfy_declaration_constraints): Don't strip the
	inherited constructor if it already has template information.

	PR c++/94597
	* pt.c (any_template_parm_r) <case IDENTIFIER_NODE>: New case.  If this
	is a conversion operator, visit its TREE_TYPE.

2020-04-21  Nathan Sidwell  <nathan@acm.org>

	* pt.c (tsubst_copy_and_build) [POINTER_PLUS_EXPR]: Check for
	error_mark_node.

2020-04-21 Iain Sandoe <iain@sandoe.co.uk>

	PR c++/94661
	* coroutines.cc (morph_fn_to_coro): Simplify return
	value computation.

2020-04-17  Marek Polacek  <polacek@redhat.com>

	PR c++/94592
	* constexpr.c (cxx_eval_outermost_constant_expr): Return when T is
	a BRACE_ENCLOSED_INITIALIZER_P.
	(is_nondependent_constant_expression): Don't check
	BRACE_ENCLOSED_INITIALIZER_P.
	(is_nondependent_static_init_expression): Likewise.

2020-04-20  Patrick Palka  <ppalka@redhat.com>

	PR c++/94628
	* cp-tree.h (lss_policy::lss_nop): New enumerator.
	* pt.c (local_specialization_stack::local_specialization_stack): Handle
	an lss_nop policy.
	(local_specialization_stack::~local_specialization_stack): Likewise.
	(tsubst_pack_expansion): Use a local_specialization_stack instead of
	manually saving and restoring local_specializations.  Conditionally
	replace local_specializations sooner, before the handling of the
	unsubstituted_packs case.

2020-04-20  Marek Polacek  <polacek@redhat.com>

	PR c++/94505 - bogus -Wparentheses warning with fold-expression.
	* pt.c (fold_expression): Add warning_sentinel for -Wparentheses
	before calling build_x_binary_op.

2020-04-20  Marek Polacek  <polacek@redhat.com>

	* coroutines.cc (captures_temporary): Don't assign the result of
	STRIP_NOPS to the same variable.

2020-04-20  Nathan Sidwell  <nathan@acm.org>

	PR c++/94454 - tpl-tpl-parms are not canonicalizable types
	* pt.c (canonical_type_parameter): Assert not a tpl-tpl-parm.
	(process_template_parm): tpl-tpl-parms are structural.
	(rewrite_template_parm): Propagate structuralness.

	PR c++/94454 - Expr pack expansion equality
	* tree.c (cp_tree_equal) [TEMPLATE_ID_EXPR, default]: Refactor.
	[EXPR_PACK_EXPANSION]: Add.

	PR c++/94454 Template Argument Hashing
	* pt.c (iterative_hash_template_arg): Strip nodes as
	template_args_equal does.
	[ARGUMENT_PACK_SELECT, TREE_VEC, CONSTRUCTOR]: Refactor.
	[node_class:TEMPLATE_TEMPLATE_PARM]: Hash by level & index.
	[node_class:default]: Refactor.

2020-04-18  Patrick Palka  <ppalka@redhat.com>

	PR c++/94632
	* tree.c (cp_tree_equal) <case PARM_DECL>: Ignore
	comparing_specializations if the parameters' contexts are identical.

	PR c++/92187
	* pt.c (splice_late_return_type): Propagate cv-qualifiers and
	PLACEHOLDER_TYPE_CONSTRAINTS from the original auto node to the new one.

2020-04-17  Patrick Palka  <ppalka@redhat.com>

	PR c++/94483
	* lambda.c (lambda_capture_field_type): Avoid doing auto deduction if
	the explicit initializer has parameter packs.

	PR c++/88754
	* parser.c (cp_parser_check_template_parameters): Before issuing a hard
	error, first try simulating an error instead.

2020-04-17  Jakub Jelinek  <jakub@redhat.com>

	PR other/94629
	* call.c (build_conditional_expr_1): Remove redundant assignment to
	arg2.

2020-04-16  Patrick Palka  <ppalka@redhat.com>

	PR c++/94475
	* cvt.c (ocp_convert): If the result of scalar_constant_value is
	erroneous, ignore it and use the original expression.

2020-04-16  Jakub Jelinek  <jakub@redhat.com>

	PR c++/94571
	* parser.c (cp_parser_simple_declaration): Fix up a pasto in
	diagnostics.

2020-04-15  Jakub Jelinek  <jakub@redhat.com>

	PR c/94593
	* parser.c (cp_parser_pragma) <case PRAGMA_OMP_REQUIRES>: Reject
	requires directive when not at file or namespace scope.

2020-04-14  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94359
	* coroutines.cc (build_actor_fn): Check that the target can
	support the resume tailcall before mandating it.

2020-04-14  Patrick Palka  <ppalka@redhat.com>

	PR c++/85278
	* cxx-pretty-print.c (cxx_pretty_printer:simple_type_specifier)
	<case DECLTYPE_TYPE>: Handle DECLTYPE_TYPE here instead of ...
	(pp_cxx_type_specifier_seq) <case DECLTYPE_TYPE>: ... here.
	(cxx_pretty_printer::direct_abstract_declarator) <case DECLTYPE_TYPE>:
	New no-op case.

	PR c++/94034
	* constexpr.c (replace_result_decl_data): New struct.
	(replace_result_decl_data_r): New function.
	(replace_result_decl): New function.
	(cxx_eval_call_expression): Use it.
	* tree.c (build_aggr_init_expr): Set the location of the AGGR_INIT_EXPR
	to that of its initializer.

2020-04-13  Marek Polacek  <polacek@redhat.com>

	PR c++/94588
	* name-lookup.c (check_local_shadow): Add an inform call.

2020-04-13  Patrick Palka  <ppalka@redhat.com>

	PR c++/94521
	* error.c (dump_scope): Pass TFF_NO_FUNCTION_ARGUMENTS to
	dump_function_decl when printing a function template instantiation as a
	scope.

	PR c++/94470
	* constexpr.c (get_or_insert_ctor_field): Set default value of parameter
	'pos_hint' to -1.
	(cxx_eval_bare_aggregate): Use get_or_insert_ctor_field instead of
	assuming the the next index belongs at the end of the new CONSTRUCTOR.
	(cxx_eval_store_expression): Revert PR c++/78572 fix.

2020-04-13  Nathan Sidwell  <nathan@acm.org>

	PR c++/94426  lambdas with internal linkage are different to no-linkage
	* decl2.c (determine_visibility): A lambda's visibility is
	affected by its extra scope.
	* pt.c (instantiate_decl): Determine var's visibility before
	instantiating its initializer.
	* tree.c (no_linkage_check): Revert code looking at visibility of
	lambda's extra scope.
`
2020-04-10  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94528
	* coroutines.cc (co_await_expander): Remove.
	(expand_one_await_expression): New.
	(process_one_statement): New.
	(await_statement_expander): New.
	(build_actor_fn): Revise to use per-statement expander.
	(struct susp_frame_data): Reorder and comment.
	(register_awaits): Factor code.
	(replace_statement_captures): New, factored from...
	(maybe_promote_captured_temps):.. here.
	(await_statement_walker): Revise to process per statement.
	(morph_fn_to_coro): Use revised susp_frame_data layout.

2020-04-10  Marek Polacek  <polacek@redhat.com>

	PR c++/94149
	* method.c (constructible_expr): In C++20, try using parenthesized
	initialization of aggregates to determine the result of
	__is_constructible.

2020-04-10  Bin Cheng  <bin.cheng@linux.alibaba.com>

	* coroutines.cc (co_await_expander): Simplify.

2020-04-09  Jason Merrill  <jason@redhat.com>

	PR c++/94523
	* constexpr.c (cxx_eval_constant_expression) [VAR_DECL]: Look at
	ctx->object and ctx->global->values first.

2020-04-09  Marek Polacek  <polacek@redhat.com>

	PR c++/93790
	* call.c (initialize_reference): If the reference binding failed, maybe
	try initializing from { }.
	* decl.c (grok_reference_init): For T& t(e), set
	LOOKUP_AGGREGATE_PAREN_INIT but don't build up a constructor yet.

2020-04-08  Iain Sandoe  <iain@sandoe.co.uk>
	    Jun Ma  <JunMa@linux.alibaba.com>

	* coroutines.cc (maybe_promote_captured_temps): Add a cleanup
	expression, if needed, to any call from which we promoted
	temporaries captured by reference.

2020-04-08  Marek Polacek  <polacek@redhat.com>

	PR c++/94507 - ICE-on-invalid with lambda template.
	* pt.c (tsubst_lambda_expr): Cope when tsubst_template_decl or
	tsubst_function_decl returns error_mark_node.

2020-04-08  Martin Liska  <mliska@suse.cz>

	PR c++/94314
	* decl.c (duplicate_decls): Duplicate also DECL_IS_REPLACEABLE_OPERATOR.
	(cxx_init_decl_processing): Mark replaceable all implicitly defined
	operators.

2020-04-08  Patrick Palka  <ppalka@redhat.com>

	Core issues 1001 and 1322
	PR c++/92010
	* pt.c (rebuild_function_or_method_type): Split function out from ...
	(tsubst_function_type): ... here.
	(maybe_rebuild_function_decl_type): New function.
	(tsubst_function_decl): Use it.

2020-04-08  Jakub Jelinek  <jakub@redhat.com>

	PR c++/94325
	* decl.c (begin_destructor_body): For CLASSTYPE_VBASECLASSES class
	dtors, if CLASSTYPE_PRIMARY_BINFO is non-NULL, but not BINFO_VIRTUAL_P,
	look at CLASSTYPE_PRIMARY_BINFO of its BINFO_TYPE if it is not
	BINFO_VIRTUAL_P, and so on.

2020-04-08  Marek Polacek  <polacek@redhat.com>

	PR c++/94478 - ICE with defaulted comparison operator
	* method.c (early_check_defaulted_comparison): Give an error when the
	context is null.

2020-04-08  Tobias Burnus  <tobias@codesourcery.com>

	PR middle-end/94120
	* paser.c (cp_parser_oacc_declare): Add check that variables
	are declared in the same scope as the directive.

2020-04-07  Jason Merrill  <jason@redhat.com>

	PR c++/94480
	* parser.c (cp_parser_requires_expression): Use tentative_firewall.

	PR c++/94481
	* parser.c (cp_parser_placeholder_type_specifier): Use
	matching_parens.

2020-04-07  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (maybe_promote_captured_temps): Ensure that
	reference capture placeholder vars are properly declared.

2020-04-07  Patrick Palka  <ppalka@redhat.com>

	PR c++/90996
	* tree.c (replace_placeholders): Look through all handled components,
	not just COMPONENT_REFs.
	* typeck2.c (process_init_constructor_array): Propagate
	CONSTRUCTOR_PLACEHOLDER_BOUNDARY up from each element initializer to
	the array initializer.

2020-04-07  Jakub Jelinek  <jakub@redhat.com>

	PR c++/94512
	* parser.c (cp_parser_omp_parallel): Set OMP_PARALLEL_COMBINED
	if cp_parser_omp_master succeeded.

2020-04-06  Jason Merrill  <jason@redhat.com>

	PR c++/94462
	* decl.c (duplicate_decls): Fix handling of DECL_HIDDEN_FRIEND_P.

2020-04-04  Marek Polacek  <polacek@redhat.com>
	    Jason Merrill  <jason@redhat.com>

	PR c++/94155 - crash in gimplifier with paren init of aggregates.
	* init.c (build_vec_init): Fill in indexes.

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

	PR c++/91377
	* mangle.c (write_expression): Skip IMPLICIT_CONV_EXPR.

2020-04-04  Patrick Palka  <ppalka@redhat.com>

	PR c++/94205
	PR c++/79937
	* constexpr.c (struct constexpr_ctx): New field 'parent'.
	(cxx_eval_bare_aggregate): Propagate CONSTRUCTOR_PLACEHOLDER_BOUNDARY
	flag from the original constructor to the reduced constructor.
	(lookup_placeholder): Prefer to return the outermost matching object
	by recursively calling lookup_placeholder on the 'parent' context,
	but don't cross CONSTRUCTOR_PLACEHOLDER_BOUNDARY constructors.
	(cxx_eval_constant_expression): Link the 'ctx' context to the 'new_ctx'
	context via 'new_ctx.parent' when being expanded without an explicit
	target.  Don't call replace_placeholders.
	(cxx_eval_outermost_constant_expr): Initialize 'ctx.parent' to NULL.

	PR c++/94219
	PR c++/94205
	* constexpr.c (get_or_insert_ctor_field): Split out (while adding
	support for VECTOR_TYPEs, and optimizations for the common case)
	from ...
	(cxx_eval_store_expression): ... here.  Rename local variable
	'changed_active_union_member_p' to 'activated_union_member_p'.  Record
	the sequence of indexes into 'indexes' that yields the subobject we're
	assigning to.  Record the integer offsets of the constructor indexes
	we're assigning through into 'index_pos_hints'.  After evaluating the
	initializer of the store expression, recompute 'valp' using 'indexes'
	and using 'index_pos_hints' as hints.
	(cxx_eval_bare_aggregate): Tweak comments.  Use get_or_insert_ctor_field
	to recompute the constructor_elt pointer we're assigning through after
	evaluating each initializer.

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

	PR c++/67825
	* constraint.cc (tsubst_valid_expression_requirement): Call
	convert_to_void.

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

	PR c++/94453
	* constexpr.c (maybe_constant_value): Use break_out_target_exprs.
	* expr.c (mark_use) [VIEW_CONVERT_EXPR]: Don't wrap a TARGET_EXPR in
	NON_LVALUE_EXPR.

2020-04-04  Jakub Jelinek  <jakub@redhat.com>

	PR debug/94441
	* parser.c (cp_parser_omp_for_loop): Use
	protected_set_expr_location_if_unset.
	* cp-gimplify.c (genericize_if_stmt, genericize_cp_loop): Likewise.

	PR c++/94477
	* pt.c (tsubst_expr) <case OMP_MASTER>: Clear
	omp_parallel_combined_clauses.

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

	PR c++/91966
	* pt.c (complex_pack_expansion_r): New.
	(complex_alias_template_p): Use it.

2020-03-31  Jason Merrill  <jason@redhat.com>

	PR c++/94205
	* constexpr.c (cxx_eval_constant_expression) [TARGET_EXPR]: Call
	replace_placeholders.
	* typeck2.c (store_init_value): Fix arguments to
	fold_non_dependent_expr.

2020-03-31  Jason Merrill  <jason@redhat.com>

	* constexpr.c (cxx_eval_constant_expression) [TARGET_EXPR]: Use
	local variables.

2020-03-30  Jason Merrill  <jason@redhat.com>

	PR c++/90711
	* tree.c (cp_tree_equal) [CALL_EXPR]: Compare KOENIG_LOOKUP_P.
	(called_fns_equal): Check DECL_CONTEXT.

2020-03-30  Jakub Jelinek  <jakub@redhat.com>

	PR c++/94385
	* semantics.c (add_stmt): Only set STMT_IS_FULL_EXPR_P on trees with
	STATEMENT_CODE_P code.

2020-03-28  Patrick Palka  <ppalka@redhat.com>

	PR c++/94306
	* parser.c (cp_parser_requires_clause_opt): Diagnose and recover from
	"requires {" when "requires requires {" was probably intended.

	PR c++/94252
	* constraint.cc (tsubst_compound_requirement): Always suppress errors
	from type_deducible_p and expression_convertible_p, as they're not
	substitution errors.
	(diagnose_atomic_constraint) <case INTEGER_CST>: Remove this case so
	that we diagnose INTEGER_CST expressions of non-bool type via the
	default case.
	* cp-gimplify.c (cp_genericize_r) <case REQUIRES_EXPR>: New case.
	* parser.c (cp_parser_requires_expression): Always parse the requirement
	body as if we're processing a template, by temporarily incrementing
	processing_template_decl.  Afterwards, if we're not actually in a
	template context, perform semantic processing to diagnose any invalid
	types and expressions.
	* pt.c (tsubst_copy_and_build) <case REQUIRES_EXPR>: Remove dead code.
	* semantics.c (finish_static_assert): Explain an assertion failure
	when the condition is a REQUIRES_EXPR like we do when it is a concept
	check.

	* constraint.cc (diagnose_compound_requirement): When diagnosing a
	compound requirement, maybe replay the satisfaction failure, subject to
	the current diagnosis depth.

	* constraint.cc (finish_constraint_binary_op): Set the location of EXPR
	as well as its range, because build_x_binary_op doesn't always do so.
	(current_constraint_diagnosis_depth): New.
	(concepts_diagnostics_max_depth_exceeded_p): New.
	(collect_operands_of_disjunction): New.
	(satisfy_disjunction): When diagnosing a satisfaction failure, maybe
	replay each branch of the disjunction, subject to the current diagnosis
	depth.
	(diagnose_valid_expression): When diagnosing a satisfaction failure,
	maybe replay the substitution error, subject to the current diagnosis
	recursion.
	(diagnose_valid_type): Likewise.
	(diagnose_nested_requiremnet): Likewise.
	(diagnosing_failed_constraint::diagnosing_failed_constraint): Increment
	current_constraint_diagnosis_depth when diagnosing.
	(diagnosing_failed_constraint::~diagnosing_failed_constraint): Decrement
	current_constraint_diagnosis_depth when diagnosing.
	(diagnosing_failed_constraint::replay_errors_p): New static member
	function.
	(diagnose_constraints): Don't diagnose if concepts_diagnostics_max_depth
	is 0.  Emit a one-off note to increase -fconcepts-diagnostics-depth if
	the limit was exceeded.
	* cp-tree.h (diagnosing_failed_constraint::replay_errors_p): Declare.

2020-03-27  Nathan Sidwell  <nathan@acm.org>

	PR c++/84733
	* name-lookup.c (do_pushdecl): Look through cleanp levels.

2020-03-27  Martin Sebor  <msebor@redhat.com>

	PR c++/94078
	PR c++/93824
	PR c++/93810
	* cp-tree.h (most_specialized_partial_spec): Declare.
	* parser.c (cp_parser_elaborated_type_specifier): Distinguish alias
	from declarations.
	(specialization_of): New function.
	(cp_parser_check_class_key): Move code...
	(class_decl_loc_t::add): ...to here.  Add parameters.  Avoid issuing
	-Wredundant-tags on first-time declarations in other declarators.
	Correct handling of template specializations.
	(class_decl_loc_t::diag_mismatched_tags): Also expect to be called
	when -Wredundant-tags is enabled.  Use primary template or partial
	specialization as the guide for uses of implicit instantiations.
	* pt.c (most_specialized_partial_spec): Declare extern.

2020-03-27  Nathan Sidwell  <nathan@acm.org>

	PR c++/94257
	* name-lookup.c (push_namespace): Triage ambiguous lookups that
	contain namespaces.

2020-03-27  Jakub Jelinek  <jakub@redhat.com>

	PR c++/94326
	* call.c (set_flags_from_callee): Don't update
	cp_function_chain->can_throw or current_function_returns_abnormally
	if cp_unevaluated_operand.

	PR c++/94339
	* cvt.c (ocp_convert): Handle COMPOUND_EXPR by recursion on the second
	operand and creating a new COMPOUND_EXPR if anything changed.

2020-03-26  Marek Polacek  <polacek@redhat.com>

	PR c++/94336 - template keyword accepted before destructor names.
	* parser.c (cp_parser_unqualified_id): Give an error when 'template'
	is followed by a destructor name.

2020-03-27  Patrick Palka  <ppalka@redhat.com>

	* decl.c (compute_array_index_type_loc): Remove redundant
	type_dependent_expression_p check that is subsumed by
	value_dependent_expression_p.
	* decl2.c (is_late_template_attribute): Likewise.
	* pt.c (uses_template_parms): Likewise.
	(dependent_template_arg_p): Likewise.

2020-03-26  Marek Polacek  <polacek@redhat.com>

	DR 1710
	PR c++/94057 - template keyword in a typename-specifier.
	* parser.c (check_template_keyword_in_nested_name_spec): New.
	(cp_parser_nested_name_specifier_opt): Implement DR1710, optional
	'template'.  Call check_template_keyword_in_nested_name_spec.
	(cp_parser_simple_type_specifier): Assume that a <
	following a qualified-id in a typename-specifier begins
	a template argument list.

2020-03-26  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (coro_init_identifiers): Initialize an identifier
	for the cororoutine handle 'address' method name.
	(struct coro_aw_data): Add fields to cover the continuations.
	(co_await_expander): Determine the kind of await_suspend in use.
	If we have the case that returns a continuation handle, then save
	this and make the target for 'scope exit without cleanup' be the
	continuation resume label.
	(expand_co_awaits): Remove.
	(struct suspend_point_info): Remove fields that kept the returned
	await_suspend handle type.
	(transform_await_expr): Remove code tracking continuation handles.
	(build_actor_fn): Add the continuation handle as an actor-function
	scope var.  Build the symmetric transfer continuation point. Call
	the tree walk for co_await expansion directly, rather than via a 
	trivial shim function.
	(register_await_info): Remove fields tracking continuation handles.
	(get_await_suspend_return_type): Remove.
	(register_awaits): Remove code tracking continuation handles.
	(morph_fn_to_coro): Remove code tracking continuation handles.

2020-03-26  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (co_await_expander): If we are expanding the
	initial await expression, set a boolean flag to show that we
	have now reached the initial await_resume() method call.
	(expand_co_awaits): Handle the 'initial await resume called' flag.
	(build_actor_fn): Insert the initial await expression into the
	start of the user-authored function-body. Handle the 'initial await
	resume called' flag.
	(morph_fn_to_coro): Initialise the 'initial await resume called'
	flag.  Modify the unhandled exception catch clause to recognise
	exceptions that occur before the initial await_resume() and re-
	throw them.

2020-03-26  Jakub Jelinek  <jakub@redhat.com>

	PR c++/81349
	* class.c (user_provided_p): Use STRIP_TEMPLATE instead of returning
	true for all TEMPLATE_DECLs.

	PR c++/94272
	* cp-gimplify.c (cp_genericize_r): Handle STATEMENT_LIST.

2020-03-25  Patrick Palka  <ppalka@redhat.com>

	PR c++/94265
	* parser.c (cp_parser_selection_statement) <case RID_IF>: Invalidate the
	current condition chain when the if-statement has a non-empty
	init-statement.

2020-03-25  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/94319
	* coroutines.cc (captures_temporary): Fix a missing dereference.

2020-03-24  Marek Polacek  <polacek@redhat.com>

	PR c++/94190 - wrong no post-decrement operator error in template.
	* call.c (convert_like_real): Use convert_from_reference on the result.

2020-03-24  Jason Merrill  <jason@redhat.com>

	PR c++/94186
	* constraint.cc (constraint_satisfaction_value): Repeat noisily on
	error.
	(tsubst_nested_requirement): Likewise.
	(get_constraint_error_location): Allow missing context.
	(diagnose_atomic_constraint): Diagnose non-bool constraint here.
	(satisfy_atom): Not here.  Only diagnose non-constant when noisy.

2020-03-24  Jason Merrill  <jason@redhat.com>

	* pt.c (any_template_parm_r): Look into the type of a non-type
	template parm.

2020-03-24  Jason Merrill  <jason@redhat.com>

	* cp-tree.h (cp_expr): When constructing from an expr and a
	location, call protected_set_expr_location.

2020-03-23  Patrick Palka  <ppalka@redhat.com>

	PR c++/93805
	* except.c (maybe_noexcept_warning): Add TODO.
	* method.c (walk_field_subobs): Pass tf_none to expr_noexcept_p.

2020-03-23  nathans  <nathan@acm.org>

	PR c++/94044
	* tree.c (cp_tree_equal) [SIZEOF_EXPR]: Detect argument pack
	operand.

2020-03-21  Patrick Palka  <ppalka@redhat.com>

	PR c++/94066
	* constexpr.c (reduced_constant_expression_p) [CONSTRUCTOR]: Properly
	handle unions without an initializer.
	(cxx_eval_component_reference): Emit a different diagnostic when the
	constructor element corresponding to a union member is NULL.
	(cxx_eval_bare_aggregate): When constructing a union, always set the
	active union member before evaluating the initializer.  Relax assertion
	that verifies the index of the constructor element we're initializing
	hasn't been changed.
	(cxx_eval_store_expression): Diagnose changing the active union member
	while the union is in the process of being initialized.  After setting
	an active union member, clear CONSTRUCTOR_NO_CLEARING on the underlying
	CONSTRUCTOR.
	(cxx_eval_constant_expression) [PLACEHOLDER_EXPR]: Don't re-reduce a
	CONSTRUCTOR returned by lookup_placeholder.

2020-03-20  Patrick Palka  <ppalka@redhat.com>

	* cxx-pretty-print.c (pp_cxx_parameter_mapping): Make extern.  Move
	the "[with ]" bits to here from ...
	(pp_cxx_atomic_constraint): ... here.
	* cxx-pretty-print.h (pp_cxx_parameter_mapping): Declare.
	* error.c (rebuild_concept_check): Delete.
	(print_concept_check_info): Print the dependent form of the constraint and the
	preferably substituted parameter mapping alongside it.

2020-03-19  Jason Merrill  <jason@redhat.com>

	PR c++/94175
	* cp-gimplify.c (simple_empty_class_p): Look through
	SIMPLE_TARGET_EXPR_P.
	(cp_gimplify_expr) [MODIFY_EXPR]: Likewise.
	[RETURN_EXPR]: Avoid producing 'return *retval;'.
	* call.c (build_call_a): Strip TARGET_EXPR from empty class arg.
	* cp-tree.h (SIMPLE_TARGET_EXPR_P): Check that TARGET_EXPR_INITIAL
	is non-null.

2020-03-19  Jakub Jelinek  <jakub@redhat.com>

	PR c++/93931
	* parser.c (cp_parser_omp_var_list_no_open): Call process_outer_var_ref
	on outer_automatic_var_p decls.
	* cp-gimplify.c (cxx_omp_disregard_value_expr): Return true also for
	capture proxy decls.

2020-03-18  Nathan Sidwell  <nathan@acm.org>

	PR c++/94147 - mangling of lambdas assigned to globals
	* parser.c (cp_parser_init_declarator): Namespace-scope variables
	provide a lambda scope.
	* tree.c (no_linkage_check): Lambdas with a variable for extra
	scope have a linkage from the variable.

2020-03-18  Jakub Jelinek  <jakub@redhat.com>

	* constraint.cc (resolve_function_concept_check, subsumes_constraints,
	strictly_subsumes): Fix up duplicated word issue in a comment.
	* coroutines.cc (build_init_or_final_await, captures_temporary):
	Likewise.
	* logic.cc (dnf_size_r, cnf_size_r): Likewise.
	* pt.c (append_type_to_template_for_access_check): Likewise.

	PR c++/91759
	* decl.c (grokfndecl): Restore old diagnostics about deduction
	guide declared in different scope if in_namespace is NULL_TREE.

2020-03-17  Jakub Jelinek  <jakub@redhat.com>

	PR c++/90995
	* parser.c (cp_parser_enum_specifier): Use temp_override for
	parser->colon_corrects_to_scope_p, replace goto out with return.
	If scoped enum or enum with underlying type is not followed by
	{ or ;, call cp_parser_commit_to_tentative_parse before calling
	cp_parser_error and make sure to return error_mark_node instead of
	NULL_TREE.  Formatting fixes.

2020-03-17  Ville Voutilainen  <ville.voutilainen@gmail.com>

	PR c++/94197
	* method.c (assignable_expr): Use cp_unevaluated.
	(is_xible_helper): Push a non-deferred access check for
	the stub objects created by assignable_expr and constructible_expr.

2020-03-17  Jakub Jelinek  <jakub@redhat.com>

	* pt.c (tsubst): Fix up duplicated word issue in a diagnostic message.
	(lookup_template_class_1, tsubst_expr): Fix up duplicated word issue
	in a comment.
	* parser.c (cp_parser_statement, cp_parser_linkage_specification,
	cp_parser_placeholder_type_specifier,
	cp_parser_constraint_requires_parens): Likewise.
	* name-lookup.c (suggest_alternative_in_explicit_scope): Likewise.

2020-03-15  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (co_await_expander): Fix indentation.

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

	PR c++/92068
	* pt.c (process_partial_specialization): Error rather than crash on
	extra pack expansion.

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

	PR c++/92909
	* pt.c (find_parameter_packs_r): [DECL_EXPR]: Walk
	DECL_ORIGINAL_TYPE of a typedef.

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.

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