* typeck.c (maybe_warn_pessimizing_move): See if the maybe-rvalue
	overload resolution would actually succeed.

	* g++.dg/cpp0x/Wredundant-move1.C (fn4): Drop dg-warning.
	* g++.dg/cpp0x/Wredundant-move7.C: New test.

From-SVN: r269427

	* include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
	* include/std/version (__cpp_lib_bounded_array_traits): Likewise.
	* testsuite/20_util/is_bounded_array/value.cc: Check for macro.
	* testsuite/20_util/is_unbounded_array/value.cc: Likewise.

From-SVN: r269426

    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/165737

From-SVN: r269424

2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>

	PR libstdc++/86655 - std::assoc_legendre should not constrain
	the value of m (or x).
	* include/tr1/legendre_function.tcc (__assoc_legendre_p,
	__sph_legendre): If degree > order Don't throw, return 0.
	(__legendre_p, __assoc_legendre_p): Don't constrain x either.
	* testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
	* testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
	* testsuite/tr1/5_numerical_facilities/special_functions/
	02_assoc_legendre/pr86655.cc: New test.
	* testsuite/tr1/5_numerical_facilities/special_functions/
	22_sph_legendre/pr86655.cc: New test.

From-SVN: r269423

* include/std/variant (__do_visit): New.
(__variant_cast): Likewise.
(__variant_cookie): Likewise.
(__erased_*): Remove.
(_Variant_storage::_S_vtable): Likewise.
(_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
(_Variant_storage::__M_reset): Adjust.
(__variant_construct): New.
(_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
__variant_construct.
(_Move_ctor_base(_Move_ctor_base&&)): Likewise.
(_Move_ctor_base::__M_destructive_copy): New.
(_Move_ctor_base::__M_destructive_move): Adjust to use
__variant_construct.
(_Copy_assign_base::operator=): Adjust to use __do_visit.
(_Copy_assign_alias): Adjust to check both copy assignment
and copy construction for triviality.
(_Move_assign_base::operator=): Adjust to use __do_visit.
(_Multi_array): Add support for visitors that accept and return
a __variant_cookie.
(__gen_vtable_impl::_S_apply_all_alts): Likewise.
(__gen_vtable_impl::_S_apply_single_alt): Likewise.
(__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
a __variant_cookie temporary for a variant that is valueless and..
(__gen_vtable_impl::__visit_invoke): ..adjust here.
(__gen_vtable::_Array_type): Conditionally make space for
the __variant_cookie visitor case.
(__variant_construct_by_index): New.
(get_if): Adjust to use std::addressof.
(relops): Adjust to use __do_visit.
(variant): Add __variant_cast and __variant_construct_by_index
as friends.
(variant::emplace): Use _M_reset() and __variant_construct_by_index
instead of self-destruction.
(variant::swap): Adjust to use __do_visit.
(visit): Reimplement in terms of __do_visit.
(__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
* testsuite/20_util/variant/compile.cc: Adjust.
* testsuite/20_util/variant/run.cc: Likewise.

From-SVN: r269422

	* include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
	constant.
	* testsuite/experimental/feat-char8_t.cc: Likewise.

From-SVN: r269421

	 * include/std/type_traits [C++20] (is_bounded_array)
	 (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
	 Define.
	 * testsuite/20_util/is_bounded_array/requirements/
	 explicit_instantiation.cc: New test.
	 * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
	 test.
	 * testsuite/20_util/is_bounded_array/value.cc: New test.
	 * testsuite/20_util/is_unbounded_array/requirements/
	 explicit_instantiation.cc: New test.
	 * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
	 * test.
	 * testsuite/20_util/is_unbounded_array/value.cc: New test.

From-SVN: r269420

2019-03-06  Martin Liska  <mliska@suse.cz>

	PR sanitizer/88684
	* sanitizer_common/sanitizer_platform.h (defined): Cherry pick.
	(SANITIZER_NON_UNIQUE_TYPEINFO): Likewise.
	* ubsan/ubsan_type_hash_itanium.cc (isDerivedFromAtOffset):
	Likewise.

From-SVN: r269419

	* include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
	Add constexpr.
	* testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.

From-SVN: r269418

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc-c.def (__ARC_UNALIGNED__): Set it on
	unaligned_access variable.
	* config/arc/arc.c (arc_override_options): Set unaligned access
	default on for HS CPUs.
	* config/arc/arc.h (STRICT_ALIGNMENT): Fix logic.

From-SVN: r269417

2019-03-06  Richard Biener  <rguenther@suse.de>

	PR testsuite/89551
	* gcc.dg/uninit-pred-8_b.c: Force logical-op-non-short-circuit
	the way that makes the testcase PASS.

From-SVN: r269416

2019-03-06  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/89577
	* doc/gcov.texi: Prefer to use --coverage.
	* doc/sourcebuild.texi: Likewise.

From-SVN: r269415

2019-03-06  Martin Liska  <mliska@suse.cz>

	* check-params-in-docs.py: Ignore a param.

From-SVN: r269414

	PR go/89598
    compiler: use GMP_RNDN rather than MPFR_RNDN
    
    Missed one last time around.  This fixes the build with mpfr 2.4.2.
    
    Fixes https://gcc.gnu.org/PR89598
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/165420

From-SVN: r269411

From-SVN: r269409

    
    In the runtime there are bad pointer checks that currently don't
    work with the concervative collector. With stack maps, the GC is
    precise and the checks should work. Enable them.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/153871

From-SVN: r269406

re PR libfortran/89593 (warning "passing argument 3 of ‘_gfortran_caf_{get,send}_by_ref’ from incompatible pointer type" when building libgfortran)

	PR libgfortran/89593
	* caf/single.c (_gfortran_caf_sendget_by_ref): Cast &temp to
	gfc_descriptor_t * to avoid warning.

From-SVN: r269405

    
    On aix/ppc64, ar tool must always have -X64 argument if it aims to
    create 64 bits archives.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/165317

From-SVN: r269404

The problem in this testcase is that the front end expects an rvalue
COND_EXPR to initialize a single temporary from one of the arms.  But
because gimplify_cond_expr used MODIFY_EXPR, instead the arms would each
create their own temporary and then copy that into the common temporary.

So, let's use INIT_EXPR instead.

	* gimplify.c (gimplify_cond_expr): Use INIT_EXPR.

From-SVN: r269403

	* class.c (is_really_empty_class): Add ignore_vptr parm.

While looking at PR86485, I noticed that many uses of is_really_empty_class
were overlooking that it returned true for a class with only a vptr;
initialization of such a class is not trivial.  Marek's P1064 patch fixed
one place in constexpr.c to also check for a vtable, but there are several
others that still don't.

This patch requires callers to explicitly choose which behavior they want.
Currently the uses in constexpr.c want to consider the vptr, and other uses
don't.

	* class.c (is_really_empty_class): Add ignore_vptr parm.
	(trivial_default_constructor_is_constexpr): Pass it.
	* call.c (build_over_call): Pass it.
	* constexpr.c (cxx_eval_constant_expression): Pass it instead of
	checking TYPE_POLYMORPHIC_P.
	(cxx_eval_component_reference, potential_constant_expression_1):
	Pass it.
	* cp-gimplify.c (simple_empty_class_p): Pass it.
	* init.c (expand_aggr_init_1): Pass it.

From-SVN: r269402

    
    If there is no f_flags field in statfs_t then rename one of the
    f_spare fields, as happened in Linux kernel version 2.6.36.  This
    fixes the build on CentOS 5.11.  The CentOS kernel will hopefully not
    fill in the f_spare field, so the resulting flags will be zero.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/165417

From-SVN: r269401

	PR go/89598
    compiler: use GMP_RNDN rather than MPFR_RNDN
    
    This fixes the build with mpfr 2.4.2.
    
    Fixes https://gcc.gnu.org/PR89598
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/165418

From-SVN: r269399

The implementation of midpoint used for integral types is due to Howard
Hinnant and avoids a branch for int and larger types (but not for chars
and shorts).

The midpoint and lerp functions for floating point types come straight
from the P0811R3 proposal, with no attempt at optimization.

	* include/c_compatibility/math.h [C++20] (lerp): Add using
	declaration.
	* include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
	(__lerp): Define function template to implement lerp.
	(lerp(float, float, float), lerp(double, double, double))
	(lerp(long double, long double, long double)): Define for C++20.
	* include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
	(midpoint(T, T), midpoint(T*, T*)): Define.
	* include/std::version [C++20] (__cpp_lib_interpolate): Define.
	* testsuite/26_numerics/lerp.cc: New test.
	* testsuite/26_numerics/midpoint/floating.cc: New test.
	* testsuite/26_numerics/midpoint/integral.cc: New test.
	* testsuite/26_numerics/midpoint/pointer.cc: New test.

From-SVN: r269398

re PR target/89587 (gcc's rs6000 configuration unconditionally sets MULTIARCH_DIRNAME, even when multiarch is disabled)

	PR target/89587
	* config/rs6000/t-linux (MULTIARCH_DIRNAME): Set to non-empty only
	if_multiarch.

From-SVN: r269396

2019-03-05  Christophe Lyon  <christophe.lyon@linaro.org>

	contrib/
	* dg-extract-results.py: Handle case where a WARNING happens with
	the first test of a harness.

From-SVN: r269394

2019-03-05  Christophe Lyon  <christophe.lyon@linaro.org>

	contrib/
	* dg-extract-results.sh: Fix order of WARNING and following test
	result.

From-SVN: r269393

	PR middle-end/89590
	* builtins.c (maybe_emit_free_warning): Punt if free doesn't have
	exactly one argument.

	* gcc.dg/pr89590.c: New test.

From-SVN: r269392

	PR tree-optimization/89570
	* match.pd (vec_cond into cond_op simplification): Don't use
	get_conditional_internal_fn, use as_internal_fn (cond_op).

Co-Authored-By: Richard Sandiford <richard.sandiford@arm.com>

From-SVN: r269391

The GCC optimizer can generate symbols with non-zero offset from simple
if-statements. Bit zero is used for the Arm/Thumb state bit, so relocations
with offsets fail if it changes bit zero and the relocation forces bit zero
to true.  The fix is to disable offsets on function pointer symbols.  

    gcc/
	PR target/89222
	* config/arm/arm.md (movsi): Use targetm.cannot_force_const_mem
	to decide when to split off a non-zero offset from a symbol.
	* config/arm/arm.c (arm_cannot_force_const_mem): Disallow offsets
	in function symbols.

    testsuite/
	PR target/89222
	* gcc.target/arm/pr89222.c: Add new test.

From-SVN: r269390

2019-03-05  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/89594
	* tree-if-conv.c (pass_if_conversion::execute): Handle
	case where .LOOP_VECTORIZED_FUNCTION was removed.

	* gcc.dg/pr89594.c: New testcase.

From-SVN: r269389

	PR tree-optimization/89487
	* gcc.dg/tree-ssa/pr89487.c: Include ../pr87600.h.
	(caml_interprete): Ifdef the whole body out if REG1 or REG2 macros
	aren't defined.  Use REG1 instead of "%r15" and REG2 instead of
	"%r14".

From-SVN: r269388

	PR bootstrap/89560
	* fold-const.c (fold_checksum_tree): Don't use fixed size buffer,
	instead alloca it only when needed with the needed size.

	* g++.dg/other/pr89560.C: New test.

From-SVN: r269386

	PR tree-optimization/89570
	* match.pd (vec_cond into cond_op simplification): Guard with
	vectorized_internal_fn_supported_p test and #if GIMPLE.

	* gcc.dg/pr89570.c: New test.

From-SVN: r269385

	PR tree-optimization/89566
	* gimple-ssa-sprintf.c (sprintf_dom_walker::handle_gimple_call):
	Set info.fncode to BUILT_IN_NONE if gimple_call_builtin_p failed.
	Punt if get_user_idx_format succeeds, but idx_format argument is
	not provided or doesn't have pointer type, or if idx_args is above
	number of provided arguments.

	* c-c++-common/pr89566.c: New test.

From-SVN: r269384

From-SVN: r269381

/cp
2019-03-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84605
	* parser.c (cp_parser_class_head): Reject TYPE_BEING_DEFINED too.

/testsuite
2019-03-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84605
	* g++.dg/parse/crash69.C: New.

From-SVN: r269378

2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>

	PR libstdc++/88996 Implement P0439R0
	Make std::memory_order a scoped enumeration.
	* include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
	add variables for the old enumerators.  Adjust calls.
	* testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
	* testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.

From-SVN: r269372

	PR c++/71446
	* call.c (field_in_pset): New function.
	(build_aggr_conv): Handle CONSTRUCTOR_IS_DESIGNATED_INIT correctly.

	* g++.dg/cpp2a/desig12.C: New test.
	* g++.dg/cpp2a/desig13.C: New test.

From-SVN: r269371

From-SVN: r269368

From-SVN: r269367