PR rtl-optimization/85925
	* rtl.h (word_register_operation_p): New predicate.
	* combine.c (record_dead_and_set_regs_1): Only apply specific handling
	for WORD_REGISTER_OPERATIONS targets to word_register_operation_p RTX.
	* rtlanal.c (nonzero_bits1): Likewise.  Adjust couple of comments.
	(num_sign_bit_copies1): Likewise.

From-SVN: r266302

2018-11-20  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/88087
	* tree-ssa-pre.c (create_expression_by_pieces): Re-materialize
	call fntype.
	* tree-ssa-sccvn.c (copy_reference_ops_from_call): Remember
	call fntype.

	* gcc.dg/tree-ssa/pr88087.c: New testcase.

From-SVN: r266301

2018-11-20  Richard Biener  <rguenther@suse.de>

	PR middle-end/88089
	* tree-data-ref.c (lambda_matrix_right_hermite): Use abs_hwi.

From-SVN: r266300

	    * gcc.c-torture/execute/align-3.c: Skip if pdp11.
	    * gcc.c-torture/execute/pr23467.c: Ditto.
	    * gcc.c-torture/execute/pr36093.c: Ditto.
	    * gcc.c-torture/execute/pr43783.c: Ditto.
	    * gcc.dg/const-elim-2.c: Xfail if pdp11.
	    * gcc.dg/torture/pr36400.c: Ditto.
	    * gcc.dg/tree-ssa/loop-1.c: Xfail for pdp11.  Add pdp11 to check
	    for jsr.

From-SVN: r266299

	* lib/target-supports.exp (check_weak_available): Return "no" for
	pdp11.

From-SVN: r266297

From-SVN: r266293

gnattools build machinery uses just-build xgcc and xg++ as $(CC) and
$(CXX) in native builds.  However, if C and C++ languages are not
enabled, it won't find them.  So, enable C and C++ if Ada is enabled.
Most of the time, this is probably no big deal: C is always enabled
anyway, and C++ is already enabled for bootstraps.

We need not enable those for cross builds, however.  At first I just
took the logic from gnattools/configure, but found it to be lacking:
it would use the just-built tools even in cross-back settings, whose
tools just built for the host would not run on the build machine.  So
I've narrowed down the test to rely on autoconf-detected cross-ness
(build->host only), but also to ensure that host matches build, and
that target matches host.

I've considered sourcing ada/config-lang.in from within
gnattools/configure, and testing lang_requires as set by it, so as to
avoid a duplication of tests that ought to remain in sync, but decided
it would be too fragile, as ada/config-lang.in does not expect srcdir
to refer to gnattools.

for  gcc/ada/ChangeLog

	PR ada/81878
	* gcc-interface/config-lang.in (lang_requires): Set to "c c++"
	when gnattools wants it.

for  gnattools/ChangeLog

	PR ada/81878
	* configure.ac (default_gnattools_target): Do not mistake
	just-built host tools as native in cross-back toolchains.
	* configure: Rebuilt.

From-SVN: r266290

re PR ipa/87957 (ICE tree check: expected tree that contains ‘decl minimal’ structure, have ‘identifier_node’ in warn_odr, at ipa-devirt.c:1051 since r265519)


	PR lto/87957
	* ipa-devirt.c (free_enum_values): Do not ICE on ODR vilations.

From-SVN: r266289

2018-11-19  Sandra Loosemore  <sandra@codesourcery.com>

	PR driver/50250

	gcc/
	* doc/invoke.texi (Link Options): Mention shared libraries
	in documentation for the -l option.  Simplify discussion and
	point to the system linker documentation for details.

From-SVN: r266287

	* parser.c (cp_parser_elaborated_type_specifier): Ensure that
	typename follows a nested-name-specifier.

	* g++.dg/parse/elab3.C: New test.
	* g++.dg/template/crash115.C: Adjust dg-error.

From-SVN: r266285

	* include/ext/throw_allocator.h
	(annotate_base::insert(void*, size_t)): Use insert result to check for
	double insert attempt.
	(annotate_base::insert_construct(void*)): Likewise.
	(annotate_base::check_allocated(void*, size_t)): Return found iterator.
	(annotate_base::erase(void*, size_t)): Use latter method returned
	iterator.
	(annotate_base::check_constructed(void*, size_t)): Return found iterator.
	(annotate_base::erase_construct(void*)): Use latter method returned
	iterator.

From-SVN: r266284

re PR rtl-optimization/88033 (ICE on valid code at -O2 and -O3 on x86-64-linux-gnu: in remove_some_program_points_and_update_live_ranges, at lra-lives.c:1179)

gcc/
	PR rtl-optimization/88033
	* ira-lives.c (non_conflicting_reg_copy_p): Skip copies from a register
	to itself.  Use HARD_REGISTER_NUM_P.

gcc/testsuite/
	PR rtl-optimization/88033
	* gcc.target/i386/pr88033.c: New test.

From-SVN: r266282

This is an alternative to https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00694.html
As richi suggested, this disables unrolling of loops vectorised with variable-length SVE
in the vectoriser itself through the loop->unroll member.

It took me a few tries to get it right, as it needs to be set to '1' to disable unrolling,
the rationale for that mechanism is described in the comment in cfgloop.h.

	* tree-vect-loop.c (vect_transform_loop): Disable further unrolling
	of the loop if vf is non-constant.

	* gcc.target/aarch64/sve/unroll-1.c: New test.

From-SVN: r266281

PR tree-optimization/87025 reports an ICE within
-fsave-optimization-record's optrecord_json_writer.

The issue is that dump_context::begin_scope creates an optinfo
of kind OPTINFO_KIND_SCOPE, but fails to call
dump_context::end_any_optinfo, so the optinfo for the scope remains
pending.

The JSON writer would normally push a JSON array for the "scope" optinfo
when the latter is emitted.  However, if a dump_* call happens that
doesn't flush the "scope" optinfo e.g. dump_printf (as opposed to
dump_printf_loc), that dump_ call is added to the pending optinfo, and
optinfo::handle_dump_file_kind changes the pending optinfo's m_kind
(e.g. to OPTINFO_KIND_NOTE).  Hence when the pending optinfo is
eventually emitted, it isn't OPTINFO_KIND_SCOPE anymore, and hence
the JSON writer doesn't create and push a JSON array for it, leading
to dump_context's view of scopes getting out-of-sync with that of
the JSON writer's.

Later, dump_context::end_scope unconditionally tries to pop the JSON scope
array, but no JSON scope array was added, leading to an assertion
failure (or crash).

The fix is to call dump_context::end_any_optinfo immediately after
creating the scope optinfo, so that it is emitted immediately, ensuring
that the JSON writer stays in-sync with the dump_context.

gcc/ChangeLog:
	PR tree-optimization/87025
	* dumpfile.c (dump_context::begin_scope): Call end_any_optinfo
	immediately after creating the scope optinfo.
	(selftest::test_pr87025): New function.
	(selftest::dumpfile_c_tests): Call it.
	* optinfo-emit-json.cc (optrecord_json_writer::pop_scope): Assert
	that we're not popping the top-level records array.
	* optinfo.cc (optinfo::handle_dump_file_kind): Assert that we're
	not changing the kind of a "scope" optinfo.

gcc/testsuite/ChangeLog:
	PR tree-optimization/87025
	* gcc.dg/pr87025.c: New test.

From-SVN: r266280

As work towards fixing PR tree-optimization/87025, this patch
eliminates global state from optinfo-emit-json.cc in favor
of adding an optional m_json_writer field to dump_context,
replacing the m_forcibly_enable_optinfo flag.

This allows for writing selftests for the interaction of the
JSON-building code with the dumpfile.c code.
In particular, the existing selftest that created optinfo
instances now exercise the JSON-building code (although no
JSON is actually written out).

The patch also simplifies the layering by replacing optinfo::emit ()
with dump_context::emit_optinfo, so that dump_context has
responsibility for keeping track of dump destinations.

gcc/ChangeLog:
	PR tree-optimization/87025
	* dump-context.h: Include "optinfo.h".
	(class optrecord_json_writer): New forward decl.
	(dump_context::forcibly_enable_optinfo_p): Delete.
	(dump_context::optinfo_enabled_p): New member function.
	(dump_context::optimization_records_enabled_p): New member
	function.
	(dump_context::set_json_writer): New member function.
	(dump_context::emit_optinfo): New member function.
	(dump_context::m_forcibly_enable_optinfo): Delete.
	(dump_context::m_json_writer): New member data.
	* dumpfile.c (dump_context::set_json_writer): New member function.
	(dump_context::finish_any_json_writer): New member function.
	(dump_context::end_scope): Replace call to
	optimization_records_maybe_pop_dump_scope with call to
	m_json_writer->pop_scope.
	(dump_context::optinfo_enabled_p): New member function.
	(dump_context::end_any_optinfo): Replace call to optinfo::emit with call
	to dump_context::emit_optinfo.
	(dump_context::emit_optinfo): New member function.
	(temp_dump_context::temp_dump_context): Replace
	m_forcibly_enable_optinfo with call to set_json_writer.
	(temp_dump_context::~temp_dump_context): Clean up any json writer.
	* optinfo-emit-json.cc (class optrecord_json_writer): Move to
	optinfo-emit-json.h
	(the_json_writer): Delete.
	(optimization_records_start): Delete.
	(optimization_records_finish): Delete.
	(optimization_records_enabled_p): Delete, in favor of
	dump_context::optimization_records_enabled_p.
	(optimization_records_maybe_record_optinfo): Delete.
	(optimization_records_maybe_pop_dump_scope): Delete.
	* optinfo-emit-json.h: Include "json.h".  Delete forward
	decl of opt_pass.
	(optimization_records_start): Delete.
	(optimization_records_finish): Delete.
	(optimization_records_enabled_p): Delete.
	(optimization_records_maybe_record_optinfo): Delete.
	(optimization_records_maybe_pop_dump_scope): Delete.
	(class optrecord_json_writer): Move here from
	optinfo-emit-json.cc.
	* optinfo.cc (optinfo::emit_for_opt_problem): Replace call
	to optinfo::emit with call to dump_context::emit_optinfo.
	(optinfo::emit): Delete, in favor of dump_context::emit_optinfo.
	(optinfo_enabled_p): Delete, in favor of
	dump_context::optinfo_enabled_p.
	(optinfo_wants_inlining_info_p): Update for conversion o
	optimization_records_enabled_p to a member function of
	dump_context.
	* optinfo.h (optinfo_enabled_p): Delete, in favor of
	dump_context::optinfo_enabled_p.
	(optinfo::emit): Delete, in favor of dump_context::emit_optinfo.
	* toplev.c: Include "dump-context.h".
	(compile_file): Replace call to optimization_records_finish with
	dump_context::finish_any_json_writer.
	(do_compile): Replace call to optimization_records_start with
	conditionally creating a optrecord_json_writer for the
	dump_context.

From-SVN: r266279

re PR libstdc++/87855 (std::optional<T> only copy-constructible if T is trivially copy-constructible)

PR libstdc++/87855

Also implement P0602R4 (variant and optional
should propagate copy/move triviality) for std::optional.
* include/std/optional (_Optional_payload): Change
the main constraints to check constructibility in
addition to assignability.
(operator=): Make constexpr.
(_M_reset): Likewise.
(_M_construct): Likewise.
(operator->): Likewise.
* testsuite/20_util/optional/assignment/8.cc: Adjust.
* testsuite/20_util/optional/assignment/9.cc: New.

From-SVN: r266278

2018-11-19  Martin Liska  <mliska@suse.cz>

	PR lto/88077
	* lto-symtab.c (lto_symtab_merge): Transform the
	condition before r256989.
2018-11-19  Martin Liska  <mliska@suse.cz>

	PR lto/88077
	* gcc.dg/lto/pr88077_0.c: New test.
	* gcc.dg/lto/pr88077_1.c: New test.

From-SVN: r266277

	PR tree-optimization/88071
	* tree-vect-loop.c (vectorize_fold_left_reduction): Pass true instead
	of false as last argument to gsi_remove.
	* tree-vect-stmts.c (vect_finish_replace_stmt): Pass true instead of
	false as last argument to gsi_replace.

	* gcc.dg/pr88071.c: New test.

From-SVN: r266276

	PR c++/60994
	* g++.dg/lookup/pr60994.C: New test.

From-SVN: r266275

	PR debug/87039
	* omp-expand.c: Don't include debug.h.
	(adjust_context_and_scope): Add REGION argument.  Find DECL_CONTEXT
	from innermost outer parallel, task, teams or target that has a
	child_fn set, or, if there is no such outer region, use
	current_function_decl.  Do the DECL_CONTEXT adjustment regardless of
	whether a suitable BLOCK is found or not.
	(expand_parallel_call, expand_teams_call): Don't call
	adjust_context_and_scope here.
	(grid_expand_target_grid_body): Revert 2017-01-25 changes.
	(expand_omp_taskreg, expand_omp_target): Likewise.  Call
	adjust_context_and_scope.
	* dwarf2out.c (dwarf2out_early_global_decl): For
	decl_function_context recurse instead of calling dwarf2out_decl.

	* g++.dg/gomp/pr78363-4.C: New test.
	* g++.dg/gomp/pr78363-5.C: New test.
	* g++.dg/gomp/pr78363-6.C: New test.
	* g++.dg/gomp/pr78363-7.C: New test.

From-SVN: r266272

2018-11-19  Richard Biener  <rguenther@suse.de>

	PR lto/87229
	* tree.c (free_lang_data_in_one_sizepos): Free non-gimple-val
	sizepos values.

	* g++.dg/lto/pr87229_0.C: New testcase.

From-SVN: r266271

2018-11-19  Martin Liska  <mliska@suse.cz>

	* g++.dg/gcov/pr84548.C: Remove remove-gcda.
	* g++.dg/gcov/ternary.C: Likewise.
	* lib/gcov.exp: Support pattern of following form:
	count(1*).

From-SVN: r266270

	* include/std/string_view (basic_string_view::copy): Use traits to
	copy.
	* testsuite/21_strings/basic_string_view/operations/copy/char/2.cc:
	New test.
	* testsuite/21_strings/basic_string_view/operations/copy/wchar_t/2.cc:
	New test.

From-SVN: r266269

	* compare-elim.c (struct comparison): Add not_in_a field.
	(is_not): New static function.
	(strip_not): Likewise.
	(conforming_compare): Handle a NOT in the first operand.
	(can_eliminate_compare): Likewise.
	(find_comparison_dom_walker::before_dom_children): Likewise.
	(try_eliminate_compare): Likewise.
	* config/visium/visium.md (negsi2_insn_set_carry): Turn into...
	(neg<mode>2_insn_set_carry): ...this and add missing NEG operation.

From-SVN: r266268

	* doc/extend.texi (Common Type Attributes): Fix typos.

From-SVN: r266267

From-SVN: r266266

From-SVN: r266265

decl2.c (grokfield): Remove obsolete _vptr check; fix explicit template argument list error location.

/cp
2018-11-18  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl2.c (grokfield): Remove obsolete _vptr check; fix
	explicit template argument list error location.

/testsuite
2018-11-18  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/template/crash91.C: Check location too.

From-SVN: r266264

2018-11-19  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/88045
	* coverage.c (coverage_begin_function): Add assert.
2018-11-19  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/88045
	* g++.dg/gcov/pr88045.C: New test.

From-SVN: r266262

2018-11-19  Martin Liska  <mliska@suse.cz>

	* check_GNU_style_lib.py: Detect mixed usage
	of spaces and tabs.

From-SVN: r266261

2018-11-18  Sandra Loosemore  <sandra@codesourcery.com>

	PR other/40498

	gcc/
	* doc/extend.texi (Common Function Attributes): Document that
	no_instrument_function applies to -p and -pg, too.
	* doc/invoke.texi (Instrumentation Options): Add cross-references
	to docs for -p, -pg, and -finstrument-functions.

From-SVN: r266260

From-SVN: r266259

libphobos/ChangeLog:

2018-11-19  Iain Buclaw  <ibuclaw@gdcproject.org>

	* src/Makefile.am: Remove std.internal.digest.sha_SSSE3 and
	std.internal.math.biguintx86 modules.
	* src/Makefile.in: Rebuild.
	* src/std/internal/digest/sha_SSSE3.d: Remove.
	* src/std/internal/math/biguintx86.d: Remove.

From-SVN: r266256

2018-11-16  Michele Pezzutti <mpezz@tiscali.it>
	    Edward Smith-Rowland  <3dw4rd@verizon.net>

	PR libstdc++/83566 - cyl_bessel_j returns wrong result for x>1000
	for high orders.
	* include/tr1/bessel_function.tcc: Perform no fewer than nu/2 iterations
	of the asymptotic series (nu is the Bessel order).
	* testsuite/tr1/5_numerical_facilities/special_functions/
	09_cyl_bessel_j/check_value.cc: Add tests at nu=100, 1000<=x<=2000.
	* testsuite/tr1/5_numerical_facilities/special_functions/	
	11_cyl_neumann/check_value.cc: Ditto.
	* testsuite/special_functions/08_cyl_bessel_j/check_value.cc: Ditto.
	* testsuite/special_functions/10_cyl_neumann/check_value.cc: Ditto.


Co-Authored-By: Edward Smith-Rowland <3dw4rd@verizon.net>

From-SVN: r266252

2018-11-18  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/88073
	* frontend-passes.c (combine_array_constructor): Do not do
	anything if in a WHERE statement.

2018-11-18  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/88073
	* gfortran.dg/where_7.f90: New test.

From-SVN: r266251

Also give target access to the gnu-user.h LINK_GCC_C_SEQUENCE_SPEC.

	* config/gnu-user.h (GNU_USER_TARGET_CRTI): Define.
	(GNU_USER_TARGET_STARTFILE_SPEC): Use it here.
	(GNU_USER_TARGET_CRTN): Define.
	(GNU_USER_TARGET_ENDFILE_SPEC): Use it here.
	(GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC): Define.

From-SVN: r266250

The HAVE_LD_PIE variant doesn't contain anything that will break
linking when !HAVE_LD_PIE that isn't already broken if you choose to
build PIEs with a linker that doesn't support PIE.  All this
HAVE_LD_PIE protects is the choice of different crt files, which is
more about libc capability than linker capability.

	* config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Delete
	!HAVE_LD_PIE variant.
	(GNU_USER_TARGET_ENDFILE_SPEC): Likewise.

From-SVN: r266249

2018-11-18  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/70260
    * expr.c (gfc_check_assign): Reject assigning to an external
    symbol.
    (gfc_check_pointer_assign): Add suppress_type_test
    argument. Insert line after if. A non-proc pointer can not point
    to a constant.  Only check types if suppress_type_test is false.
    * gfortran.h (gfc_check_pointer_assign): Add optional
    suppress_type_test argument.
    * resolve.c (gfc_resolve_code):  Move up gfc_check_pointer_assign
    and give it the extra argument.
    (resolve_fl_procedure): Set error on value for a function with
    an inizializer.

2018-11-18  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/70260
    * gfortran.dg/proc_ptr_result_5.f90:  Add dg-error directive.
    * gfortran.dg/protected_4.f90: Split line to allow for extra error.
    * gfortran.dg/protected_6.f90: Likewise.
    * gfortran.dg/assign_11.f90: New test.
    * gfortran.dg/pointer_assign_12.f90: New test.

From-SVN: r266248

From-SVN: r266247

2018-11-17  Eric Gallager  <egallager@gcc.gnu.org>
	    Sandra Loosemore  <sandra@codesourcery.com>

	PR driver/31357

	gcc/
	* doc/invoke.texi (Overall Options): Document that --help and 
	--help=<value> options cannot be combined.

Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>

From-SVN: r266246