PR libstdc++/93244
	* include/bits/fs_path.h (path::generic_string<C,A>)
	[_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash.
	* testsuite/27_io/filesystem/path/generic/generic_string.cc: Check
	root-dir is converted to forward slash in generic pathname.
	* testsuite/27_io/filesystem/path/generic/utf.cc: New test.
	* testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test.

This implements the new requirements for C++20 that std::atomic should
initialize the atomic variable in its default constructor.

This patch does not add the deprecated attribute to atomic_init, but
that should be done at some point as it's deprecated in C++20.

The paper also deprecates the ATOMIC_FLAG_INIT macro, although we can't
apply the deprecated attribute to a macro.

	PR libstdc++/58605
	* include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
	Define.
	(__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
	(__atomic_float): Add default member initializer for C++20.
	* include/std/atomic (atomic): Likewise.
	(atomic::atomic()): Remove noexcept-specifier on default constructor.
	* include/std/version (__cpp_lib_atomic_value_initialization): Define.
	* testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
	number.
	* testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
	* testsuite/29_atomics/atomic/cons/value_init.cc: New test.
	* testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
	* testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
	expected result for is_trivially_default_constructible.
	* testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
	* testsuite/29_atomics/atomic_float/value_init.cc: New test.
	* testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
	* testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
	* testsuite/29_atomics/atomic_integral/cons/value_init.cc
	* testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
	expected results for is_trivially_default_constructible.
	* testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
	new test generator.

	PR driver/92757
	* doc/invoke.texi (Warning Options): Add caveat about some warnings
	depending on optimization settings.

2020-01-13  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/90838
	* tree-ssa-forwprop.c (simplify_count_trailing_zeroes): Use
	SCALAR_INT_TYPE_MODE directly in CTZ_DEFINED_VALUE_AT_ZERO macro
	argument rather than to initialize temporary for targets that
	don't use the mode argument at all.  Initialize ctzval to avoid
	warning at -O0.

This patch updates the gcc_release script, used for snapshots and
releases, to use git instead of SVN.

The parts of the changes used in building snapshots have been tested.
The parts used for building releases have not, so it's likely further
fixes may turn out to be needed there when releases are first built
from git.

	* gcc_release: Use git instead of SVN.
	* crontab: Update gcc_release calls.

This patch replaces the update_version_svn script, that updates the
DATESTAMP files from cron, with update_version_git.

	* update_version_git: New file.
	* update_version:svn: Remove.
	* crontab: Use update_version_git.

	* README.MOVED_TO_GIT: Remove.

	* README.MOVED_TO_GIT: New file.

From-SVN: r280156

From-SVN: r280155

2020-01-10  Kwok Cheung Yeung  <kcy@codesourcery.com>

	libgcc/
	* config/gcn/atomic.c: Remove include of stdint.h.
	(__sync_val_compare_and_swap_##SIZE): Replace uintptr_t with
	__UINTPTR_TYPE__.

From-SVN: r280152

	include/
	* gomp-constants.h (enum gomp_device_property): Remove.
	libgomp/
	* libgomp-plugin.h (enum goacc_property): New.  Adjust all users
	to use this instead of 'enum gomp_device_property'.
	(GOMP_OFFLOAD_get_property): Rename to...
	(GOMP_OFFLOAD_openacc_get_property): ... this.  Adjust all users.
	* libgomp.h (struct gomp_device_descr): Move
	'GOMP_OFFLOAD_openacc_get_property'...
	(struct acc_dispatch_t): ... here.  Adjust all users.
	* plugin/plugin-hsa.c (GOMP_OFFLOAD_get_property): Remove.
	liboffloadmic/
	* plugin/libgomp-plugin-intelmic.cpp (GOMP_OFFLOAD_get_property):
	Remove.

From-SVN: r280150

	gcc/
	* tree.h (OMP_CLAUSE_USE_DEVICE_PTR_IF_PRESENT): New definition.
	* tree-core.h: Document it.
	* gimplify.c (gimplify_omp_workshare): Set it.
	* omp-low.c (lower_omp_target): Use it.
	* tree-pretty-print.c (dump_omp_clause): Print it.
	gcc/testsuite/
	* c-c++-common/goacc/host_data-1.c: Extend.
	* gfortran.dg/goacc/host_data-tree.f95: Likewise.

	gcc/
	* omp-low.c (lower_omp_target) <OMP_CLAUSE_USE_DEVICE_PTR etc.>:
	Assert that for OpenACC we always have 'GOMP_MAP_USE_DEVICE_PTR'.

	libgomp/
	* target.c (gomp_map_vars_internal)
	<GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT>: Clean up/elaborate code
	paths.

From-SVN: r280149

This fixes a typo and also explains why test_container is not a range
when used with output_iterator_wrapper or input_iterator_wrapper.

	* testsuite/util/testsuite_iterators.h: Improve comment.

From-SVN: r280146

This patch adds support for associating a "diagnostic_path" with a
diagnostic: a sequence of events predicted by the compiler that leads to
the problem occurring, with their locations in the user's source,
text descriptions, and stack information (for handling interprocedural
paths).

For example, the following (hypothetical) error has a 3-event
intraprocedural path:

test.c: In function 'demo':
test.c:29:5: error: passing NULL as argument 1 to 'PyList_Append' which
  requires a non-NULL parameter
   29 |     PyList_Append(list, item);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~
  'demo': events 1-3
     |
     |   25 |   list = PyList_New(0);
     |      |          ^~~~~~~~~~~~~
     |      |          |
     |      |          (1) when 'PyList_New' fails, returning NULL
     |   26 |
     |   27 |   for (i = 0; i < count; i++) {
     |      |   ~~~
     |      |   |
     |      |   (2) when 'i < count'
     |   28 |     item = PyLong_FromLong(random());
     |   29 |     PyList_Append(list, item);
     |      |     ~~~~~~~~~~~~~~~~~~~~~~~~~
     |      |     |
     |      |     (3) when calling 'PyList_Append', passing NULL from (1) as argument 1
     |

The patch adds a new "%@" format code for printing event IDs, so that
in the above, the description of event (3) mentions event (1), showing
the user where the bogus NULL value comes from (the event IDs are
colorized to draw the user's attention to them).

There is a separation between data vs presentation: the above shows how
the diagnostic-printing code has consolidated the path into a single run
of events, since all the events are near each other and within the same
function; more complicated examples (such as interprocedural paths)
might be printed as multiple runs of events.

Examples of how interprocedural paths are printed can be seen in the
test suite (which uses a plugin to exercise the code without relying
on specific warnings using this functionality).

Other output formats include
- JSON,
- printing each event as a separate "note", and
- to not emit paths.

gcc/ChangeLog:
	* Makefile.in (OBJS): Add tree-diagnostic-path.o.
	* common.opt (fdiagnostics-path-format=): New option.
	(diagnostic_path_format): New enum.
	(fdiagnostics-show-path-depths): New option.
	* coretypes.h (diagnostic_event_id_t): New forward decl.
	* diagnostic-color.c (color_dict): Add "path".
	* diagnostic-event-id.h: New file.
	* diagnostic-format-json.cc (json_from_expanded_location): Make
	non-static.
	(json_end_diagnostic): Call context->make_json_for_path if it
	exists and the diagnostic has a path.
	(diagnostic_output_format_init): Clear context->print_path.
	* diagnostic-path.h: New file.
	* diagnostic-show-locus.c (colorizer::set_range): Special-case
	when printing a run of events in a diagnostic_path so that they
	all get the same color.
	(layout::m_diagnostic_path_p): New field.
	(layout::layout): Initialize it.
	(layout::print_any_labels): Don't colorize the label text for an
	event in a diagnostic_path.
	(gcc_rich_location::add_location_if_nearby): Add
	"restrict_to_current_line_spans" and "label" params.  Pass the
	former to layout.maybe_add_location_range; pass the latter
	when calling add_range.
	* diagnostic.c: Include "diagnostic-path.h".
	(diagnostic_initialize): Initialize context->path_format and
	context->show_path_depths.
	(diagnostic_show_any_path): New function.
	(diagnostic_path::interprocedural_p): New function.
	(diagnostic_report_diagnostic): Call diagnostic_show_any_path.
	(simple_diagnostic_path::num_events): New function.
	(simple_diagnostic_path::get_event): New function.
	(simple_diagnostic_path::add_event): New function.
	(simple_diagnostic_event::simple_diagnostic_event): New ctor.
	(simple_diagnostic_event::~simple_diagnostic_event): New dtor.
	(debug): New overload taking a diagnostic_path *.
	* diagnostic.def (DK_DIAGNOSTIC_PATH): New.
	* diagnostic.h (enum diagnostic_path_format): New enum.
	(json::value): New forward decl.
	(diagnostic_context::path_format): New field.
	(diagnostic_context::show_path_depths): New field.
	(diagnostic_context::print_path): New callback field.
	(diagnostic_context::make_json_for_path): New callback field.
	(diagnostic_show_any_path): New decl.
	(json_from_expanded_location): New decl.
	* doc/invoke.texi (-fdiagnostics-path-format=): New option.
	(-fdiagnostics-show-path-depths): New option.
	(-fdiagnostics-color): Add "path" to description of default
	GCC_COLORS; describe it.
	(-fdiagnostics-format=json): Document how diagnostic paths are
	represented in the JSON output format.
	* gcc-rich-location.h (gcc_rich_location::add_location_if_nearby):
	Add optional params "restrict_to_current_line_spans" and "label".
	* opts.c (common_handle_option): Handle
	OPT_fdiagnostics_path_format_ and
	OPT_fdiagnostics_show_path_depths.
	* pretty-print.c: Include "diagnostic-event-id.h".
	(pp_format): Implement "%@" format code for printing
	diagnostic_event_id_t *.
	(selftest::test_pp_format): Add tests for "%@".
	* selftest-run-tests.c (selftest::run_tests): Call
	selftest::tree_diagnostic_path_cc_tests.
	* selftest.h (selftest::tree_diagnostic_path_cc_tests): New decl.
	* toplev.c (general_init): Initialize global_dc->path_format and
	global_dc->show_path_depths.
	* tree-diagnostic-path.cc: New file.
	* tree-diagnostic.c (maybe_unwind_expanded_macro_loc): Make
	non-static.  Drop "diagnostic" param in favor of storing the
	original value of "where" and re-using it.
	(virt_loc_aware_diagnostic_finalizer): Update for dropped param of
	maybe_unwind_expanded_macro_loc.
	(tree_diagnostics_defaults): Initialize context->print_path and
	context->make_json_for_path.
	* tree-diagnostic.h (default_tree_diagnostic_path_printer): New
	decl.
	(default_tree_make_json_for_path): New decl.
	(maybe_unwind_expanded_macro_loc): New decl.

gcc/c-family/ChangeLog:
	* c-format.c (local_event_ptr_node): New.
	(PP_FORMAT_CHAR_TABLE): Add entry for "%@".
	(init_dynamic_diag_info): Initialize local_event_ptr_node.
	* c-format.h (T_EVENT_PTR): New define.

gcc/testsuite/ChangeLog:
	* gcc.dg/format/gcc_diag-10.c (diagnostic_event_id_t): New
	typedef.
	(test_diag): Add coverage of "%@".
	* gcc.dg/plugin/diagnostic-path-format-default.c: New test.
	* gcc.dg/plugin/diagnostic-path-format-inline-events-1.c: New test.
	* gcc.dg/plugin/diagnostic-path-format-inline-events-2.c: New test.
	* gcc.dg/plugin/diagnostic-path-format-inline-events-3.c: New test.
	* gcc.dg/plugin/diagnostic-path-format-none.c: New test.
	* gcc.dg/plugin/diagnostic-test-paths-1.c: New test.
	* gcc.dg/plugin/diagnostic-test-paths-2.c: New test.
	* gcc.dg/plugin/diagnostic-test-paths-3.c: New test.
	* gcc.dg/plugin/diagnostic-test-paths-4.c: New test.
	* gcc.dg/plugin/diagnostic_plugin_test_paths.c: New.
	* gcc.dg/plugin/plugin.exp: Add the new plugin and test cases.

libcpp/ChangeLog:
	* include/line-map.h (class diagnostic_path): New forward decl.
	(rich_location::get_path): New accessor.
	(rich_location::set_path): New function.
	(rich_location::m_path): New field.
	* line-map.c (rich_location::rich_location): Initialize m_path.

From-SVN: r280142

re PR tree-optimization/93210 (Sub-optimal code optimization on struct/combound constexpr (gcc vs. clang))

	PR tree-optimization/93210
	* fold-const.h (native_encode_initializer,
	can_native_interpret_type_p): Declare.
	* fold-const.c (native_encode_string): Fix up handling with off != -1,
	simplify.
	(native_encode_initializer): New function, moved from dwarf2out.c.
	Adjust to native_encode_expr compatible arguments, including dry-run
	and partial extraction modes.  Don't handle STRING_CST.
	(can_native_interpret_type_p): No longer static.
	* gimple-fold.c (fold_ctor_reference): For native_encode_expr, verify
	offset / BITS_PER_UNIT fits into int and don't call it if
	can_native_interpret_type_p fails.  If suboff is NULL and for
	CONSTRUCTOR fold_{,non}array_ctor_reference returns NULL, retry with
	native_encode_initializer.
	(fold_const_aggregate_ref_1): Formatting fix.
	* dwarf2out.c (native_encode_initializer): Moved to fold-const.c.
	(tree_add_const_value_attribute): Adjust caller.

	* gcc.dg/pr93210.c: New test.
	* g++.dg/opt/pr93210.C: New test.

From-SVN: r280141

	PR tree-optimization/90838
	* tree-ssa-forwprop.c (simplify_count_trailing_zeroes): Use
	SCALAR_INT_TYPE_MODE instead of TYPE_MODE as operand of
	CTZ_DEFINED_VALUE_AT_ZERO.

From-SVN: r280140

2020-01-10  Vladimir Makarov  <vmakarov@redhat.com>

	PR inline-asm/93027
	* gcc.target/i386/pr93027.c: Use the right PR number in the test.

From-SVN: r280138

	PR libgomp/93219
	* libgomp.h (gomp_print_string): Change return type from void to int.
	* affinity-fmt.c (gomp_print_string): Likewise.  Return true if
	not all characters have been written.

From-SVN: r280137

From-SVN: r280136

2020-01-10  Vladimir Makarov  <vmakarov@redhat.com>

	PR inline-asm/93207
	* gcc.target/i386/pr93207.c: Run it only for x86-64.

From-SVN: r280135

This patch adds support for obscuring the line numbers printed in the
left-hand margin when printing the source code, converting them to "NN",
e.g from:

  7111 |   if (!(flags & 0x0001)) {
       |      ^
       |      |
       |      (1) following 'true' branch...
  7112 |

to:

   NN  |   if (!(flags & 0x0001)) {
       |      ^
       |      |
       |      (1) following 'true' branch...
   NN  |

This is useful in followup patches e.g. when testing how interprocedural
paths are printed using multiline.exp, to avoid depending on precise line
numbers.

gcc/testsuite/ChangeLog:
	* lib/gcc-dg.exp (cleanup-after-saved-dg-test): Reset global
	nn_line_numbers_enabled.
	* lib/multiline.exp (nn_line_numbers_enabled): New global.
	(dg-enable-nn-line-numbers): New proc.
	(maybe-handle-nn-line-numbers): New proc.
	* lib/prune.exp (prune_gcc_output): Call maybe-handle-nn-line-numbers.

From-SVN: r280134

2020-01-10  Vladimir Makarov  <vmakarov@redhat.com>

	PR inline-asm/93207
	* lra-constraints.c (match_reload): Permit input operands have the
	same mode as output while other input operands have a different
	mode.

2020-01-10  Vladimir Makarov  <vmakarov@redhat.com>

	PR inline-asm/93207
	* gcc.target/i386/pr93207.c: New test.

From-SVN: r280133

Support common idioms for count trailing zeroes using an array lookup.
The canonical form is array[((x & -x) * C) >> SHIFT] where C is a magic
constant which when multiplied by a power of 2 creates a unique value
in the top 5 or 6 bits.  This is then indexed into a table which maps it
to the number of trailing zeroes.  When the table is valid, we emit a
sequence using the target defined value for ctz (0):

int ctz1 (unsigned x)
{
  static const char table[32] =
    {
      0, 1, 28, 2, 29, 14, 24, 3, 30, 22, 20, 15, 25, 17, 4, 8,
      31, 27, 13, 23, 21, 19, 16, 7, 26, 12, 18, 6, 11, 5, 10, 9
    };

  return table[((unsigned)((x & -x) * 0x077CB531U)) >> 27];
}

Is optimized to:

	rbit	w0, w0
	clz	w0, w0
	and	w0, w0, 31
	ret

    gcc/
	PR tree-optimization/90838
	* tree-ssa-forwprop.c (check_ctz_array): Add new function.
	(check_ctz_string): Likewise.
	(optimize_count_trailing_zeroes): Likewise.
	(simplify_count_trailing_zeroes): Likewise.
	(pass_forwprop::execute): Try ctz simplification.
	* match.pd: Add matching for ctz idioms.

    testsuite/
	PR tree-optimization/90838
	* testsuite/gcc.target/aarch64/pr90838.c: New test.

From-SVN: r280132

gcc/ChangeLog:

2020-01-10  Stam Markianos-Wright  <stam.markianos-wright@arm.com>

	* config/aarch64/aarch64.c (aarch64_invalid_conversion): New function
	for target hook.
	(aarch64_invalid_unary_op): New function for target hook.
	(aarch64_invalid_binary_op): New function for target hook.

gcc/testsuite/ChangeLog:

2020-01-10  Stam Markianos-Wright  <stam.markianos-wright@arm.com>

	* g++.target/aarch64/bfloat_cpp_typecheck.C: New test.
	* gcc.target/aarch64/bfloat16_scalar_typecheck.c: New test.
	* gcc.target/aarch64/bfloat16_vector_typecheck_1.c: New test.
	* gcc.target/aarch64/bfloat16_vector_typecheck_2.c: New test.

From-SVN: r280130

2020-01-10  Stam Markianos-Wright  <stam.markianos-wright@arm.com>

	* config.gcc: Add arm_bf16.h.
	* config/aarch64/aarch64-builtins.c
	(aarch64_simd_builtin_std_type): Add BFmode.
	(aarch64_init_simd_builtin_types): Define element types for vector
	types.
	(aarch64_init_bf16_types): New function.
	(aarch64_general_init_builtins): Add arm_init_bf16_types function call.
	* config/aarch64/aarch64-modes.def: Add BFmode and V4BF, V8BF vector
	modes.
	* config/aarch64/aarch64-simd-builtin-types.def: Add BF SIMD types.
	* config/aarch64/aarch64-simd.md: Add BF vector types to NEON move
	patterns.
	* config/aarch64/aarch64.h (AARCH64_VALID_SIMD_DREG_MODE): Add V4BF.
	(AARCH64_VALID_SIMD_QREG_MODE): Add V8BF.
	* config/aarch64/aarch64.c
	(aarch64_classify_vector_mode): Add support for BF types.
	(aarch64_gimplify_va_arg_expr): Add support for BF types.
	(aarch64_vq_mode): Add support for BF types.
	(aarch64_simd_container_mode): Add support for BF types.
	(aarch64_mangle_type): Add support for BF scalar type.
	* config/aarch64/aarch64.md: Add BFmode to movhf pattern.
	* config/aarch64/arm_bf16.h: New file.
	* config/aarch64/arm_neon.h: Add arm_bf16.h and Bfloat vector types.
	* config/aarch64/iterators.md: Add BF types to mode attributes.
	(HFBF, GPF_TF_F16_MOV, VDMOV, VQMOV, VQMOV_NO2Em VALL_F16MOV): New.

2020-01-10  Stam Markianos-Wright  <stam.markianos-wright@arm.com>

	* g++.dg/abi/mangle-neon-aarch64.C: Add Bfloat SIMD types to test.
	* g++.dg/ext/arm-bf16/bf16-mangle-aarch64-1.C: New test.
	* gcc.target/aarch64/bfloat16_scalar_1.c: New test.
	* gcc.target/aarch64/bfloat16_scalar_2.c: New test.
	* gcc.target/aarch64/bfloat16_scalar_3.c: New test.
	* gcc.target/aarch64/bfloat16_scalar_4.c: New test.
	* gcc.target/aarch64/bfloat16_simd_1.c: New test.
	* gcc.target/aarch64/bfloat16_simd_2.c: New test.
	* gcc.target/aarch64/bfloat16_simd_3.c: New test.

From-SVN: r280129

Back in SVN r131862 richi removed this code to fix PR 34235, but didn't
remove the parallel code from the C front-end because the bug had previously
been fixed in r44080.  This patch copies the code from C again.

	* typeck.c (cp_build_binary_op): Restore short_shift code.

From-SVN: r280128

We don't unshare CONSTRUCTORs as often during constexpr evaluation, so we
need to unshare them here.

	* constexpr.c (cxx_eval_outermost_constant_expr): Don't assume
	CONSTRUCTORs are already unshared.

From-SVN: r280127

My patch for 93033 wasn't sufficient to handle all the possible sharing
introduced by split_nonconstant_init, and it occurred to me that it would
make sense to use the same unsharing technique as unshare_body, namely
copy_if_shared.

	PR c++/93033
gcc/
	* gimplify.c (copy_if_shared): No longer static.
	* gimplify.h: Declare it.
gcc/cp/
	* 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.

From-SVN: r280126

related_vector_mode and compatible_vector_types_p make it possible
to generate 128-bit SVE code while still maintaining the distinction
between SVE vectors and Advanced SIMD vectors.  We can therefore generate
VL-specific code for -msve-vector-bits=128 on little-endian targets.
In theory we could do the same for big-endian targets, but it could
have quite a high overhead; see the comment in the patch for details.

2020-01-10  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* doc/invoke.texi (-msve-vector-bits=): Document that
	-msve-vector-bits=128 now generates VL-specific code for
	little-endian targets.
	* config/aarch64/aarch64-sve-builtins.cc (register_builtin_types): Use
	build_vector_type_for_mode to construct the data vector types.
	* config/aarch64/aarch64.c (aarch64_convert_sve_vector_bits): Generate
	VL-specific code for -msve-vector-bits=128 on little-endian targets.
	(aarch64_simd_container_mode): Always prefer Advanced SIMD modes
	for 128-bit vectors.

gcc/testsuite/
	* gcc.target/aarch64/sve/struct_vect_1.c (N): Protect with #ifndef.
	* gcc.target/aarch64/sve/pcs/return_1_128.c: New test.
	* gcc.target/aarch64/sve/pcs/return_4_128.c: Likewise.
	* gcc.target/aarch64/sve/pcs/return_5_128.c: Likewise.
	* gcc.target/aarch64/sve/pcs/return_6_128.c: Likewise.
	* gcc.target/aarch64/sve/pcs/stack_clash_1_128.c: Likewise.
	* gcc.target/aarch64/sve/pcs/stack_clash_2_128.c: Likewise.
	* gcc.target/aarch64/sve/single_5.c: Likewise.
	* gcc.target/aarch64/sve/struct_vect_25.c: Likewise.
	* gcc.target/aarch64/sve/struct_vect_26.c: Likewise.

From-SVN: r280125

gcc/c-family/ChangeLog:

	PR c/93132
	* c-attribs.c (append_access_attrs): Validate against the translated
	access string rather than the human-readable representation.

gcc/testsuite/ChangeLog:

	PR c/93132
	* gcc.dg/attr-access-read-only-2.c: New test.

From-SVN: r280124

aarch64_evpc_sel (new in GCC 10) got the true and false vectors
the wrong way round, leading to execution failures with fixed-length
128-bit SVE.

Now that the ACLE types are in trunk, it's much easier to match
the exact asm sequence for a permute.

2020-01-10  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/aarch64/aarch64.c (aarch64_evpc_sel): Fix gen_vcond_mask
	invocation.

gcc/testsuite/
	* gcc.target/aarch64/sve/sel_1.c: Use SVE types for the arguments and
	return values.  Use check-function-bodies instead of scan-assembler.
	* gcc.target/aarch64/sve/sel_2.c: Likewise
	* gcc.target/aarch64/sve/sel_3.c: Likewise.

From-SVN: r280121

    
    It's not part of the POSIX shell standard.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/214300

From-SVN: r280118

	* testsuite/25_algorithms/equal/deque_iterators/1.cc: Don't use C++11
	initialization syntax.

From-SVN: r280117

Since LWG 445 was implemented for GCC 4.7, the std::iterator base class
of std::istreambuf_iterator changes type depending on the -std mode
used. This creates an ABI incompatibility between different -std modes.

This change ensures the base class always has the same type. This makes
layout for C++98 compatible with the current -std=gnu++14 default, but
no longer compatible with C++98 code from previous releases. In practice
this is unlikely to cause real problems, because it only affects the
layout of types with two std::iterator base classes, one of which comes
from std::istreambuf_iterator. Such types are expected to be vanishingly
rare.

	PR libstdc++/92285
	* include/bits/streambuf_iterator.h (istreambuf_iterator): Make type
	of base class independent of __cplusplus value.
	[__cplusplus < 201103L] (istreambuf_iterator::reference): Override the
	type defined in the base class
	* testsuite/24_iterators/istreambuf_iterator/92285.cc: New test.
	* testsuite/24_iterators/istreambuf_iterator/requirements/
	base_classes.cc: Adjust expected base class for C++98.

From-SVN: r280116

2020-01-10  Gergö Barany  <gergo@codesourcery.com>
	    Thomas Schwinge <thomas@codesourcery.com>
	    Julian Brown  <julian@codesourcery.com>
	    Tobias Burnus  <tobias@codesourcery.com>

        gcc/c/
        * c-parser.c (OACC_HOST_DATA_CLAUSE_MASK): Add PRAGMA_OACC_CLAUSE_IF
        and PRAGMA_OACC_CLAUSE_IF_PRESENT.

        gcc/cp/
        * parser.c (OACC_HOST_DATA_CLAUSE_MASK): Add PRAGMA_OACC_CLAUSE_IF
        and PRAGMA_OACC_CLAUSE_IF_PRESENT.

        gcc/fortran/
        * openmp.c (OACC_HOST_DATA_CLAUSES): Add PRAGMA_OACC_CLAUSE_IF
        and PRAGMA_OACC_CLAUSE_IF_PRESENT.

	gcc/
	* omp-low.c (lower_omp_target): Use GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT
	if PRAGMA_OACC_CLAUSE_IF_PRESENT exist.

	gcc/testsuite/
	* c-c++-common/goacc/host_data-1.c: Added tests of if and if_present
	clauses on host_data.
	* gfortran.dg/goacc/host_data-tree.f95: Likewise.

	include/
	* gomp-constants.h (enum gomp_map_kind): New enumeration constant
	GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT.
        
	libgomp/
	* oacc-parallel.c (GOACC_data_start): Handle
	GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT.
	* target.c (gomp_map_vars_async): Likewise.
	* testsuite/libgomp.oacc-c-c++-common/host_data-7.c: New.
	* testsuite/libgomp.oacc-fortran/host_data-5.F90: New.

From-SVN: r280115

aarch64_builtin_vectorized_function checked vectors based on the
number of elements and the element mode.  This doesn't interact
well with fixed-length 128-bit SVE, where SVE modes can have those
same properties.  (And we can't just use the built-ins for SVE because
the types use a different ABI.  SVE handles this kind of thing using
optabs instead.)

2020-01-10  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/aarch64/aarch64-builtins.c
	(aarch64_builtin_vectorized_function): Check for specific vector modes,
	rather than checking the number of elements and the element mode.

From-SVN: r280114

The related_vector_mode series missed this case in
vect_create_epilog_for_reduction, where we want to create the
unsigned integer equivalent of another vector.  Without it we
could mix SVE and Advanced SIMD vectors in the same operation.

This showed up on existing tests when testing with fixed-length
-msve-vector-bits=128.

2020-01-10  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-vect-loop.c (vect_create_epilog_for_reduction): Use
	get_related_vectype_for_scalar_type rather than build_vector_type
	to create the index type for a conditional reduction.

From-SVN: r280112

update_epilogue_loop_vinfo applies SSA renmaing to the DR_REF of a
gather or scatter, so that vect_check_gather_scatter continues to work.
However, we sometimes also rely on vect_check_gather_scatter when
using gathers and scatters to implement strided accesses.

This showed up on existing tests when testing with fixed-length
-msve-vector-bits=128.

2020-01-10  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-vect-loop.c (update_epilogue_loop_vinfo): Update DR_REF
	for any type of gather or scatter, including strided accesses.

From-SVN: r280111

    
    This is a language change for Go 1.14.
    
    Updates golang/go#6977
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/214240

From-SVN: r280109