2019-04-30  Martin Liska  <mliska@suse.cz>

	* opts.c (enable_warning_as_error): Provide hints
	for unknown options.
2019-04-30  Martin Liska  <mliska@suse.cz>

	* c-pragma.c (handle_pragma_diagnostic): Provide hints
	for unknown options.
2019-04-30  Martin Liska  <mliska@suse.cz>

	* gcc.dg/Werror-13.c: Add new tests for it.
	* gcc.dg/pragma-diag-6.c: Likewise.

From-SVN: r270693

2019-04-30  Martin Liska  <mliska@suse.cz>

	PR debug/90288
	* doc/invoke.texi: Add missing dash for gas-locview-support
	and gno-as-locview-support.

From-SVN: r270692

From-SVN: r270691

	PR target/89093
	* config/aarch64/aarch64.c (aarch64_process_one_target_attr): Don't skip
	whitespace at the start of target attribute string.

	* gcc.target/aarch64/pr89093.c: New test.
	* gcc.target/aarch64/pr63304_1.c: Remove space from target string.

From-SVN: r270690

	* config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Change _Lock_policyE2 exports
	to _Lock_policyE[012].
	* config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.

From-SVN: r270687

This keeps coming up repeatedly and the ACLE has finally added
__ARM_FEATURE_ATOMICS for the LSE feature in GCC. This is now part of
the latest ACLE release
(https://developer.arm.com/docs/101028/latest/5-feature-test-macros)

I know it's late for GCC-9 but this is a simple macro which need not
wait  for another year.

Ok for trunk and to backport to all release branches ?

Tested with a simple build and a smoke test.

PR target/86538
* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define
__ARM_FEATURE_ATOMICS

From-SVN: r270686

The root_path.cc test had some debugging macros left in accidentally, so
didn't FAIL correctly if an assertion failed.

The string-char8_t.cc tests didn't compile on Windows.

	* testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
	macros accidentally left in.
	* testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
	unnecessary -lstdc++fs option. Fix test for mingw.
	* testsuite/experimental/filesystem/path/native/string-char8_t.cc:
	Fix test for mingw.

From-SVN: r270685

2019-04-30  Martin Liska  <mliska@suse.cz>

	* gimple-fold.c (gimple_fold_builtin_memory_op): Change endp
	into built_in_function enum. Remove code for endp == 2 and
	use BUILT_IN_* constants.
	(gimple_fold_builtin): Call the function with fcode.

From-SVN: r270682

2019-04-30  Martin Liska  <mliska@suse.cz>

	* config/i386/i386.c (ix86_builtin_reciprocal): Cast
	DECL_FUNCTION_CODE into ix86_builtins enum before
	the switch statement.

From-SVN: r270681

	PR tree-optimization/89475
	* tree-ssa-ccp.c (evaluate_stmt): Handle BUILT_IN_BSWAP{16,32,64}
	calls.

	* gcc.dg/tree-ssa/pr89475.c: New test.

From-SVN: r270680

From-SVN: r270678

2019-04-30  Martin Liska  <mliska@suse.cz>

	PR translation/90274
	* opts.c (print_filtered_help): Wrap string in _(...).

From-SVN: r270675

	PR tree-optimization/90240
	Revert:
	2019-04-23  Bin Cheng  <bin.cheng@linux.alibaba.com>

	PR tree-optimization/90078
	* tree-ssa-loop-ivopts.c (comp_cost::operator +,-,+=,-+,/=,*=): Add
	checks for infinite_cost overflow.

	* gcc/testsuite/g++.dg/tree-ssa/pr90078.C: New test.

From-SVN: r270673

From-SVN: r270672

From-SVN: r270667

From-SVN: r270665

	* cp-demangle.c (d_expression_1): Don't peek ahead unless the current
	char is valid.
	* testsuite/demangle-expected: Add testcase.

From-SVN: r270664

From-SVN: r270662

	* config.gcc (default_gnu_indirect_function): Default to yes
	for arm*-*-netbsd*, i[34567]86-*-netbsd*, powerpc*-*-netbsd*,
	sparc*-*-netbsd*, x86_64-*-netbsd*

From-SVN: r270661

	* tree-ssa-uninit.c (is_pred_expr_subset_of): Correctly handle cases
	where cond2 is NE_EXPR.
	(is_value_included_in): Update comment.

        * gcc.dg/uninit-25-gimple.c: New test.
        * gcc.dg/uninit-25.c: New test.
        * gcc.dg/uninit-26.c: New test.
        * gcc.dg/uninit-27-gimple.c: New test.

From-SVN: r270660

2019-04-29  Michael K. Darling  <darlingm@gmail.com>

        * gnatvsn.ads: Bump Library_Version to 10.

From-SVN: r270659

    
    This avoids a compiler crash on invalid code.
    
    Fixes https://gcc.gnu.org/PR90272
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/174377

From-SVN: r270658

re PR tree-optimization/90278 (ICE: verify_gimple failed (error: statement marked for throw, but doesn't))

2019-04-29  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90278
	* tree-ssa-forwprop.c (pass_forwprop::execute): Transfer/clean
	EH on comparison simplification.

	* gcc.dg/torture/pr90278.c: New testcase.

From-SVN: r270657

If a noexcept function calls a function that might throw, doing the tail
call optimization means that an exception thrown in the called function
will propagate out, breaking the noexcept specification.  So we need to
prevent the optimization in that case.

	* tree-tailcall.c (find_tail_calls): Don't turn a call from a
	nothrow function to a might-throw function into a tail call.

From-SVN: r270656

https://gcc.gnu.org/ml/gcc-patches/2019-04/msg01174.html
	* decl.c (duplicate_decls): Add whitespace, move comments into
	conditional blocks.
	* method.c (explain_implicit_non_constexpr): Refactor.
	* pt.c (check_explicit_specialization): Fix indentation.
	* semantics.c (process_outer_var_ref): Reformat.
	(finish_id_expression_1): Use STRIP_TEMPLATE.

From-SVN: r270655

...since it was only ever zero in practice.  I wondered about making
it a symbolic constant instead, but it didn't seem worth it when
there was only one user (and that user was part of the internal
tree-data-ref.c implementation).

2019-04-29  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-data-ref.h (data_dependence_relation::inner_loop): Delete.
	(DDR_INNER_LOOP): Likewise.
	* tree-data-ref.c (dump_data_dependence_relation): Update accordingly.
	(initialize_data_dependence_relation): Likewise.
	(insert_innermost_unit_dist_vector): Use 0 instead of DDR_INNER_LOOP.

From-SVN: r270654

	PR rtl-optimization/90257
	* cfgrtl.c (flow_active_insn_p): Return true for USE of a function
	return value.

	Revert the revert:
	2019-04-21  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/90178
	Revert:
	2018-11-21  Uros Bizjak  <ubizjak@gmail.com>

	Revert the revert:
	2013-10-26  Vladimir Makarov  <vmakarov@redhat.com>

	Revert:
	2013-10-25  Vladimir Makarov  <vmakarov@redhat.com>

	* lra-spills.c (lra_final_code_change): Remove useless move insns.

From-SVN: r270653

2019-04-29  Richard Biener  <rguenther@suse.de>

	* tree-ssa.c (insert_debug_temp_for_var_def): For {CLOBBER}
	rhs issue a reset.

From-SVN: r270652

	* include/bits/stl_algo.h (generate_n): Adjust doxygen comment.

From-SVN: r270651

	* include/bits/move.h (swap(T&, T&), swap(T (&)[N], T (&)[N])): Use
	_GLIBCXX_NOEXCEPT_IF to simplify declarations.

From-SVN: r270650

	PR libstdc++/71312
	* src/c++11/shared_ptr.cc (get_mutex): Align pool mutexes to 64 bytes.

From-SVN: r270649

We already added it to the std::vector primary template.

	* include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
	attribute.

From-SVN: r270648

This class template has been unused since __gnu_debug::__base was
removed in r263786.

	* include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
	class template and partial specialization.

From-SVN: r270647

The standard only requires that _Size can be converted to an integral
type, not that it can be used for arithmetic. Add a new set of
__size_to_integer helper functions to do the conversion (which will be
ambiguous if there is no one conversion that is better than any others).

Also add tests for DR 426 which requires these algorithms and search_n
to handle negative values of n.

	PR libstdc++/87982
	* include/bits/stl_algo.h (generate_n): Convert _Size parameter to
	an integral type.
	* include/bits/stl_algobase.h (__size_to_integer): New overloaded
	functions to convert a value to an integral type.
	(__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
	(fill_n): Convert _Size parameter to an integral type.
	* testsuite/25_algorithms/fill_n/dr426.cc: New test.
	* testsuite/25_algorithms/generate_n/87982.cc: New test.
	* testsuite/25_algorithms/generate_n/dr426.cc: New test.

From-SVN: r270646

Merges upstream druntime aab44549, phobos 3dc363783.

Reviewed-on: https://github.com/dlang/druntime/pull/2590
	     https://github.com/dlang/phobos/pull/6983

libphobos/ChangeLog:

2019-04-28  Iain Buclaw  <ibuclaw@gdcproject.org>

	* libdruntime/gcc/sections/elf_shared.d (IBMZ_Any): Define when
	version S390 or SystemZ.  Use condition instead of SystemZ.
	(getTLSRange): Return null on GNU_EMUTLS targets.

From-SVN: r270639

Merges upstream druntime 1ca80e4e, phobos b5e9661a0.

Reviewed-on: https://github.com/dlang/druntime/pull/2587
	     https://github.com/dlang/phobos/pull/6981

From-SVN: r270638

From-SVN: r270637

From-SVN: r270633

2019-04-28 Nina Dinka Ranns <dinka.ranns@gmail.com>

* libstdc++-v3/include/std/tuple:
(tuple()): Add noexcept-specification.
(tuple(const _Elements&...)): Likewise
(tuple(_UElements&&...)): Likewise
(tuple(const tuple<_UElements...>&)): Likewise
(tuple(tuple<_UElements...>&&)): Likewise
(tuple(const _T1&, const _T2&)): Likewise
(tuple(_U1&&, _U2&&)): Likewise
(tuple(const tuple<_U1, _U2>&): Likewise
(tuple(tuple<_U1, _U2>&&): Likewise
(tuple(const pair<_U1, _U2>&): Likewise
(tuple(pair<_U1, _U2>&&): Likewise
* libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New

From-SVN: r270632

From-SVN: r270630