* 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

The test options_set_10.c shouldn't run when cross compiled.
In addition to gating it on linux I'm also gating it on native now.

gcc/testsuite/ChangeLog:

	PR target/88530
	* gcc.target/aarch64/options_set_10.c:

From-SVN: r269366

	* testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
	directive.

From-SVN: r269365

Fix PR89437

Fix PR89437. Fix the sinatan-1.c testcase to not run without
a C99 target system.  Use nextafterl for long double initialization.

Fix an issue with sinl (atanl (sqrtl (LDBL_MAX)) returning 0.0
instead of 1.0 by using x < sqrtl (LDBL_MAX) in match.pd.

    gcc/
	PR tree-optimization/89437
	* match.pd: Use lt in sin(atan(x)) and cos(atan(x)) simplifications.

    testsuite/
	PR tree-optimization/89437
	* gcc.dg/sinatan-1.c: Fix testcase.

From-SVN: r269364

re PR tree-optimization/89572 (ICE in dyn_cast<gcond*, gimple>(gimple*) / get_loop_exit_condition(loop const*))

2019-03-04  Richard Biener  <rguenther@suse.de>

	PR middle-end/89572
	* tree-scalar-evolution.c: (get_loop_exit_condition): Use
	safe_dyn_cast.

	* gcc.dg/torture/pr89572.c: New testcase.

From-SVN: r269363

	* include/std/memory_resource (polymorphic_allocator): Add default
	template argument for C++20.
	(polymorphic_allocator::allocate_bytes)
	(polymorphic_allocator::deallocate_bytes)
	(polymorphic_allocator::allocate_object)
	(polymorphic_allocator::deallocate_object)
	(polymorphic_allocator::new_object)
	(polymorphic_allocator::delete_object): New member functions for
	C++20.
	* testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
	test.

From-SVN: r269362

	PR tree-optimization/89487
	* tree-loop-distribution.c (has_nonaddressable_dataref_p): New.
	(create_rdg_vertices): Compute has_nonaddressable_dataref_p.
	(distribute_loop): Don't do runtime alias check if there is non-
	addressable data reference.
	* tree-ssa-loop-ivopts.c (may_be_nonaddressable_p): Check if VAR_DECL
	is a register variable.

	* gcc/testsuite/gcc.dg/tree-ssa/pr89487.c: New test.

From-SVN: r269361

From-SVN: r269360

	PR libstdc++/89562
	* src/filesystem/ops-common.h (do_copy_file): Open files in binary
	mode for mingw.

From-SVN: r269356

2019-03-03  Harald Anlauf  <anlauf@gmx.de>
	    Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/77583
	* symbol.c (check_conflict): Check for valid procedure name
	passed to error reporting routine.

	PR fortran/77583
	* gfortran.dg/pr77583.f90: New test.


Co-Authored-By: Steven G. Kargl <kargl@gcc.gnu.org>

From-SVN: r269353

2019-03-03  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/72714
	* resolve.c (resolve_allocate_expr): Add some tests for coarrays.

2019-03-03  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/72714
	* gfortran.dg/coarray_allocate_11.f90: New test.

From-SVN: r269352

From-SVN: r269347

libphobos/ChangeLog:

2019-02-24  Johannes Pfau  <johannespfau@gmail.com>

	* src/std/digest/murmurhash.d: PR d/89177: Backport from upstream.
	Fixes unaligned data access (PR d/89177).

From-SVN: r269343

2019-03-02  Harald Anlauf  <anlauf@gmx.de>

	PR fortran/89516
	* check.c (gfc_calculate_transfer_sizes): Correct checks for cases
	where storage size of elements of MOLD is 0.

	PR fortran/89516
	* gfortran.dg/pr89492.f90: Adjust testcase.
	* gfortran.dg/transfer_check_5.f90: New test.

From-SVN: r269341

	PR c++/71446
	* cp-tree.h (CONSTRUCTOR_IS_DESIGNATED_INIT): Define.
	* parser.c (cp_parser_braced_list): Adjust cp_parser_initializer_list
	caller, set CONSTRUCTOR_IS_DESIGNATED_INIT.
	(cp_parser_initializer_list): Add designated parameter, set *designated
	to a bool whether any designators were parsed.
	* decl.c (reshape_init): Copy over CONSTRUCTOR_IS_DESIGNATED_INIT if
	needed.
	* pt.c (tsubst_copy_and_build): Likewise.
	* call.c (implicit_conversion): If CONSTRUCTOR_IS_DESIGNATED_INIT,
	don't call build_list_conv, nor build_complex_conv, nor attempt to
	convert a single element initializer to scalar.

	* g++.dg/cpp2a/desig10.C: New test.
	* g++.dg/cpp2a/desig11.C: New test.
	* g++.dg/ext/desig4.C: Expect 4 new errors.

From-SVN: r269340

	PR target/89506
	* config/arm/arm.md (cmpsi2_addneg): Use
	trunc_int_for_mode (-INTVAL (...), SImode) instead of -INTVAL (...).
	If operands[2] is 0 or INT_MIN, force use of subs.
	(*compare_scc splitter): Use gen_int_mode.
	(*negscc): Likewise.
	* config/arm/thumb2.md (*thumb2_negscc): Likewise.

	* gcc.dg/pr89506.c: New test.

From-SVN: r269339

	PR go/89406
    go/internal/gccgoimporter: remove temporary directories in test
    
    Backport of https://golang.org/cl/164862.
    
    Updates https://gcc.gnu.org/PR89406
    
    Reviewed-on: https://go-review.googlesource.com/c/164863

From-SVN: r269338

	Kito Cheng  <kito.cheng@gmail.com>
	Monk Chiang  <sh.chiang04@gmail.com>

	gcc/
	* common/config/riscv/riscv-common.c: Include sstream.
	(riscv_subset_list::to_string): New.
	(riscv_arch_str): Likewise.
	* config.gcc (riscv*-*-*): Handle --with-riscv-attribute=
	* config.in: Regen.
	* config/riscv/riscv-protos.h (riscv_arch_str): New.
	* config/riscv/riscv.c (INCLUDE_STRING): Defined.
	(riscv_emit_attribute): New.
	(riscv_file_start): Emit attribute if needed.
	(riscv_option_override): Init riscv_emit_attribute_p.
	* config/riscv/riscv.opt (mriscv-attribute): New option.
	* configure.ac (riscv*-*-*): Check binutils is supporting ELF
	* configure: Regen.
	* doc/install.texi: Document --with-riscv-attribute.
	* doc/invoke.texi: Document -mriscv-attribute.

	* common/config/riscv/riscv-common.c:
	Include config/riscv/riscv-protos.h.
	(INCLUDE_STRING): Defined.
	(RISCV_DONT_CARE_VERSION): Defined.
	(riscv_subset_t): Declare.
	(riscv_subset_t::riscv_subset_t): New.
	(riscv_subset_list): Declare.
	(riscv_subset_list::riscv_subset_list): New.
	(riscv_subset_list::~riscv_subset_list): Likewise.
	(riscv_subset_list::parsing_subset_version): Likewise.
	(riscv_subset_list::parse_std_ext): Likewise.
	(riscv_subset_list::parse_sv_or_non_std_ext): Likewise.
	(riscv_subset_list::add): Likewise.
	(riscv_subset_list::lookup): Likewise.
	(riscv_subset_list::xlen): Likewise.
	(riscv_subset_list::parse): Likewise.
	(riscv_supported_std_ext): Likewise.
	(current_subset_list): Likewise.
	(riscv_parse_arch_string): Using riscv_subset_list::parse to
	parse.

	gcc/testsuite/
	* gcc.target/riscv/attribute-1.c: New.
	* gcc.target/riscv/attribute-2.c: Likewise.
	* gcc.target/riscv/attribute-3.c: Likewise.
	* gcc.target/riscv/attribute-4.c: Likewise.
	* gcc.target/riscv/attribute-5.c: Likewise.
	* gcc.target/riscv/attribute-6.c: Likewise.
	* gcc.target/riscv/attribute-7.c: Likewise.
	* gcc.target/riscv/attribute-8.c: Likewise.
	* gcc.target/riscv/attribute-9.c: Likewise.

	* gcc.target/riscv/arch-1.c: New.
	* gcc.target/riscv/arch-2.c: Likewise.
	* gcc.target/riscv/arch-3.c: Likewise.
	* gcc.target/riscv/arch-4.c: Likewise.

Co-Authored-By: Monk Chiang <sh.chiang04@gmail.com>

From-SVN: r269337

From-SVN: r269336

    
    This restores part of https://golang.org/cl/45695 that was
    accidentally lost in https://golang.org/cl/158019 (the update to
    Go1.12beta2).
    
    Reviewed-on: https://go-review.googlesource.com/c/164737

From-SVN: r269333