From-SVN: r263563

2018-08-15  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

c/
	* c-decl.c (start_decl): Do not warn if variables is named as main
	and is a local variable.

testsuite/
	* gcc.dg/wmain.c: New test.

From-SVN: r263562

PR tree-optimization/71625 - missing strlen optimization on different array
initialization style (avoid compilation errors on aarch64)

gcc/ChangeLog:
	* config/aarch64/aarch64-builtins.c
	(aarch64_init_simd_builtin_types): Clear Poly8_t's TYPE_STRING_FLAG.

From-SVN: r263561

Since there is no branch splitting anymore, the loop is no longer
necessary: pool chunkification can be done in one step.

gcc/ChangeLog:

2018-08-15  Ilya Leoshkevich  <iii@linux.ibm.com>

	* config/s390/s390.c (s390_reorg): Remove loop.

From-SVN: r263557

2018-08-15  Iain Sandoe <iain@sandoe.co.uk>

gcc/c:

        PR c/19315
        * c-decl.c (finish_decl): Don't add the 'extern' storage class to
        objects of unknown size.

gcc/testsuite:

        PR c/19315
        gcc.dg/graphite/pr82451.c: Make array 'a' an extern.
        gcc.dg/redecl-10.c: Expect warnings for the static vars with unknown
        size.

From-SVN: r263556

gcc/

2018-08-15  Iain Sandoe  <iain@sandoe.co.uk>

	* config/darwin.c
	 (darwin_function_switched_text_sections): Delete.
	* gcc/config/darwin.h
	 (TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS): Likewise.

From-SVN: r263555

	* src/c++17/memory_resource.cc [!_GLIBCXX_HAS_GTHREADS]
	(atomic_mem_res): Add unsynchronized definition for single-threaded.

From-SVN: r263554

gcc/

2018-08-15  Iain Sandoe  <iain@sandoe.co.uk>

	PR target/81685
	* config/darwin.h: (DEBUG_STR_OFFSETS_SECTION, DEBUG_LOCLISTS_SECTION,
	DEBUG_RNGLISTS_SECTION) new macros.  (DEBUG_PUBNAMES_SECTION,
	DEBUG_PUBTYPES_SECTION) update to include GNU variant.

From-SVN: r263553

2018-08-15  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/86925
	* predict.c (expr_expected_value_1): When taking
        later predictor, assign also probability.
        Use fold_build2_initializer_loc in order to fold
        the expression in -frounding-math.
2018-08-15  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/86925
	* gcc.dg/predict-20.c: New test.
	* gcc.dg/predict-21.c: New test.

From-SVN: r263552

decl.c (check_previous_goto_1): When decl_jump_unsafe returns 2 emit an error instead of a permerror.

/cp
2018-08-15  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (check_previous_goto_1): When decl_jump_unsafe returns 2
	emit an error instead of a permerror.

/testsuite
2018-08-15  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/init/goto3.C: Adjust for error instead of permerror.

From-SVN: r263551

Backport of RISC-V support for libffi go closures
* src/riscv/ffi.c (ffi_call_go, ffi_prep_go_closure): New
functions.
(ffi_call_int): Renamed from ffi_call.
(ffi_call_asm, ffi_closure_inner): Adjust interface.
* src/riscv/ffitarget.h (FFI_GO_CLOSURES): Define.
* src/riscv/sysv.S (ffi_go_closure_asm): New function.
(ffi_closure_asm, ffi_call_asm): Update for adjusted interfaces.

From-SVN: r263550

	* config/i386/i386.c (expand_vec_perm_movs): New method matching movs
	patterns.
	(expand_vec_perm_1): Try the new method.

	* gcc.target/i386/sse2-movs.c: New test.

From-SVN: r263549

re PR target/86547 (s390x: Maximum number of LRA assignment passes is achieved (30) when compiling a small inline assembler snippet)

        PR target/86547
	* lra-lives.c (remove_some_program_points_and_update_live_ranges):
        Check whether lra_live_max_point is 0 before dividing.

From-SVN: r263548

From-SVN: r263547

	* configure.ac: Check for <sys/random.h>.
	* configure, config.h.in: Regenerate.
	* intrinsics/random.c [HAVE_SYS_RANDOM_H]: Include <sys/random.h>.

From-SVN: r263543

As explained in the PR, there's no reason to call the nothrow delete,
we can just use the normal one.

	PR libstdc++/86954
	* include/bits/stl_tempbuf.h (return_temporary_buffer): Use
	non-placement delete.

From-SVN: r263542

gcc/ChangeLog:

	PR tree-optimization/86650
	* tree-vrp.c (vrp_prop::check_array_ref): Print an inform message.
	(vrp_prop::check_mem_ref): Same.

gcc/testsuite/ChangeLog:

	PR tree-optimization/86650
	* gcc.dg/Warray-bounds-34.c: New test.

From-SVN: r263541

2018-08-14  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/86116
	* interface.c (compare_type): Remove a CLASS/TYPE check.
	(compare_type_characteristics): New function that behaves like the old
	'compare_type'.
	(gfc_check_dummy_characteristics, gfc_check_result_characteristics):
	Call 'compare_type_characteristics' instead of 'compare_type'.

2018-08-14  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/86116
	* gfortran.dg/generic_34.f90: New test case.

From-SVN: r263540

	* include/std/chrono (__check_overflow): Simplify definition.
	(_Checked_integral_constant): Remove.

From-SVN: r263537

Define a class using std::mutex for when std::atomic<memory_resource*>
cannot be used to implement the default memory resource.

When std::mutex constructor is not constexpr the constant_init trick
won't work, so just define a global and use init_priority for it. The
compiler warns about using reserved priority, so put the definition in a
header file using #pragma GCC system_header to suppress the warning.

	PR libstdc++/86846
	* src/c++17/default_resource.h: New file, defining default_res.
	* src/c++17/memory_resource.cc [ATOMIC_POINTER_LOCK_FREE != 2]
	(atomic_mem_res): Define alternative for atomic<memory_resource*>
	using a mutex instead of atomics.

From-SVN: r263536

[ios::failure] p2: "When throwing ios_base::failure exceptions,
implementations should provide values of ec that identify the specific
reason for the failure."

This adds a new overload of __throw_ios_failure that can be passed
errno, to store error_code(errno, system_category()) in the exception
object.

	PR libstdc++/85343
	* acinclude.m4 (libtool_VERSION): Bump version.
	* config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add new symbol version.
	Export new symbol.
	* configure: Regenerate.
	* doc/xml/manual/abi.xml: Document new versions.
	* include/bits/fstream.tcc (basic_filebuf<C, T>::underflow)
	(basic_filebuf<C, T>::xsgetn): Pass errno to __throw_ios_failure.
	* include/bits/functexcept.h (__throw_ios_failure(const char*, int)):
	Declare new overload.
	* src/c++11/cxx11-ios_failure.cc (__ios_failure): Add new constructor
	and static member function.
	(__throw_ios_failure(const char*, int)): Define.
	* src/c++98/ios_failure.cc [!_GLIBCXX_USE_DUAL_ABI]
	(__throw_ios_failure(const char*, int)): Define.
	* testsuite/util/testsuite_abi.cc: Update known and latest versions.

From-SVN: r263535

Rope iterators sometimes contain pointers to an internal buffer
inside the iterator itself.  When such an iterator is copied, the
copy incorrectly retains pointers to the original.

This patch takes the simple approach of not copying the cached
information when the internal buffer is being used, instead
requiring it to be recomputed when the copied iterator is
dereferenced.  An alternative would be to adjust the pointers so
they refer to the buffer in the copy.

2018-08-14  Jeremy Sawicki  <jeremy-gcc@sawicki.us>

	* include/ext/rope (_Rope_iterator_base(const _Rope_iterator_base&))
	(_Rope_const_iterator::operator=(const _Rope_const_iterator&))
	(_Rope_iterator::operator=(const _Rope_iterator&)): Ensure
	copied/assigned rope iterators don't retain pointers to the iterator
	they were copied/assigned from.
	* testsuite/ext/rope/7.cc: New.

From-SVN: r263534

* gcc/pretty-print.c (eat_esc_sequence): Swap the foreground and background
colors if the COMMON_LVB_REVERSE_VIDEO flag is set, and clear it thereafter,
as it only works for DBCS.

From-SVN: r263531

pretty-print.c (mingw_ansi_fputs): Do not call _close() on the handle returned by _get_osf_handle().

* gcc/pretty-print.c (mingw_ansi_fputs): Do not call _close() on the handle
returned by _get_osf_handle().

From-SVN: r263530

From-SVN: r263527

	PR c++/57891
	* call.c (struct conversion): Add check_narrowing_const_only.
	(build_converted_constant_expr): Set check_narrowing and
	check_narrowing_const_only.  Give error if expr is error node.
	(convert_like_real): Pass it to check_narrowing.
	* cp-tree.h (check_narrowing): Add a default parameter.
	* decl.c (compute_array_index_type): Use input_location instead of
	location_of.
	* pt.c (convert_nontype_argument): Return NULL_TREE if tf_error.
	* typeck2.c (check_narrowing): Don't warn for instantiation-dependent
	expressions.  Call maybe_constant_value instead of
	fold_non_dependent_expr.  Don't mention { } in diagnostic.  Only check
	narrowing for constants if CONST_ONLY.

	* g++.dg/cpp0x/Wnarrowing6.C: New test.
	* g++.dg/cpp0x/Wnarrowing7.C: New test.
	* g++.dg/cpp0x/Wnarrowing8.C: New test.
	* g++.dg/cpp0x/Wnarrowing9.C: New test.
	* g++.dg/cpp0x/Wnarrowing10.C: New test.
	* g++.dg/cpp0x/constexpr-47969.C: Adjust dg-error.
	* g++.dg/cpp0x/constexpr-ex2.C: Likewise.
	* g++.dg/cpp0x/constexpr-targ.C: Likewise.
	* g++.dg/cpp0x/scoped_enum2.C: Likewise.
	* g++.dg/ext/stmtexpr15.C: Likewise.
	* g++.dg/gomp/pr47963.C: Likewise.
	* g++.dg/init/new37.C: Likewise.
	* g++.dg/init/new43.C: Likewise.
	* g++.dg/other/fold1.C: Likewise.
	* g++.dg/parse/array-size2.C: Likewise.
	* g++.dg/template/dependent-name3.C: Likewise.
	* g++.dg/cpp0x/constexpr-data2.C: Add dg-error.
	* g++.dg/other/vrp1.C: Likewise.
	* g++.dg/template/char1.C: Likewise.

From-SVN: r263523

The getentropy function, found on Linux, OpenBSD, and recently also
FreeBSD, can be used to get random bytes to initialize the PRNG.  It
is similar to the traditional way of reading from /dev/urandom, but
being a system call rather than a special file, it doesn't suffer from
problems like running out of file descriptors, or failure when running
in a container where /dev/urandom may not be available.

Regtested on x86_64-pc-linux-gnu, Ok for trunk?

2018-08-13  Janne Blomqvist  <jb@gcc.gnu.org>

	* configure.ac: Check for getentropy.
	* intrinsics/random.c (getosrandom): Use getentropy if available.
	* config.h.in: Regenerated.
	* configure: Regenerated.

From-SVN: r263522

After the combine 2-2 changes, this testcase does not have a ZERO_EXTEND
in the intermediate code, but an AND instead.


gcc/testsuite/
	* gcc.target/powerpc/pr56605.c: The generated code can have an AND
	instead of a ZERO_EXTEND.

From-SVN: r263521

[gcc]

2018-07-06  Will Schmidt  <will_schmidt@vnet.ibm.com>

	* gcc/config/rs6000/rs6000.c (rs6000_gimple_fold_builtin): Add support
	for folding vec_perm.

From-SVN: r263520

rs6000.c (rs6000_gimple_fold_builtin): Add support for gimple-folding of vec_pack() and vec_unpack() intrinsics.

[gcc]

2018-08-13 Will Schmidt  <will_schmidt@vnet.ibm.com>

	* config/rs6000/rs6000.c (rs6000_gimple_fold_builtin):
	Add support for gimple-folding of vec_pack() and vec_unpack()
	intrinsics.

From-SVN: r263519

	PR libstdc++/45093
	* include/bits/stl_tree.h (_Rb_tree::_M_destroy_node(_Link_type)):
	Combine definitions to avoid --detect-odr-violations warning.

From-SVN: r263516

	* libsupc++/new_opa.cc (operator new(size_t, align_val_t)): Use
	__is_pow2 to check for valid alignment. Avoid branching when rounding
	size to multiple of alignment.

From-SVN: r263515

	* include/Makefile.am: Install <bit> and <version> for freestanding.
	* include/Makefile.in: Regenerate.
	* testsuite/17_intro/freestanding.cc: Check for <bit> and <version>.

From-SVN: r263514

This reverts commit r263461 / 2e920cd849b3cf0a72df4f172e27676a3e70b73f
because aligned_alloc is not defined for baremetal newlib targets, see
https://gcc.gnu.org/ml/libstdc++/2018-08/msg00065.html

Revert
2018-08-10  Sebastian Huber  <sebastian.huber@embedded-brains.de>

	PR target/85904
	* configure.ac: Define HAVE_ALIGNED_ALLOC if building for
	Newlib.
	* configure: Regenerate.

From-SVN: r263513

[gcc]

2018-08-13 Will Schmidt <will_schmidt@vnet.ibm.com>

	* config/rs6000/rs6000.c (rs6000_builtin_valid_without_lhs): Add
	vec_xst variants to the list.
	(rs6000_gimple_fold_builtin): Add support for folding unaligned
	vector loads and stores.

From-SVN: r263512

gcc/c/ChangeLog:

	PR tree-optimization/71625
	* c-parser.c (c_parser_declaration_or_fndef): Call
	braced_list_to_string.

gcc/c-family/ChangeLog:

	PR tree-optimization/71625
	* c-common.c (braced_list_to_string): New function.
	* c-common.h (braced_list_to_string): Declare it.

gcc/cp/ChangeLog:

	PR tree-optimization/71625
	* decl.c (check_initializer):  Call braced_list_to_string.
	(eval_check_narrowing): New function.
	* gcc/cp/typeck2.c (digest_init_r): Accept strings literals
	as initilizers for all narrow character types.

gcc/testsuite/ChangeLog:

	PR tree-optimization/71625

	* g++.dg/init/string2.C: New test.
	* g++.dg/init/string3.C: New test.
	* g++.dg/init/string4.C: New test.
	* gcc.dg/init-string-3.c: New test.
	* gcc.dg/strlenopt-55.c: New test.
	* gcc.dg/strlenopt-56.c: New test.

From-SVN: r263511

	P0806R2 - Deprecate implicit capture of this via [=]
	* lambda.c (add_default_capture): Formatting fixes.  Warn about
	deprecated implicit capture of this via [=].

	* g++.dg/cpp2a/lambda-this1.C: New test.
	* g++.dg/cpp2a/lambda-this2.C: New test.
	* g++.dg/cpp2a/lambda-this3.C: New test.

From-SVN: r263508

	PR c++/86915
	* decl.c (create_array_type_for_decl): Handle null name.

	* g++.dg/diagnostic/auto1.C: New test.

From-SVN: r263507

        * config.gcc (rs6000-ibm-aix4.x): Delete.
        (rs6000-ibm-aix5.1): Delete.
        (rs6000-ibm-aix5.2): Delete.
        (rs6000-ibm-aix5.3): Delete.
        * config/rs6000/aix43.h: Delete.
        * config/rs6000/aix51.h: Delete.
        * config/rs6000/aix52.h: Delete.
        * config/rs6000/t-aix43: Delete.

From-SVN: r263506

The CUDA driver API starting version 6.5 offers a set of runtime functions to
calculate several occupancy-related measures, as a replacement for the occupancy
calculator spreadsheet.

This patch adds a heuristic for default runtime launch geometry, based on the
new runtime function cuOccupancyMaxPotentialBlockSize.

Build on x86_64 with nvptx accelerator and ran libgomp testsuite.

2018-08-13  Cesar Philippidis  <cesar@codesourcery.com>
	    Tom de Vries  <tdevries@suse.de>

	PR target/85590
	* plugin/cuda/cuda.h (CUoccupancyB2DSize): New typedef.
	(cuOccupancyMaxPotentialBlockSize): Declare.
	* plugin/cuda-lib.def (cuOccupancyMaxPotentialBlockSize): New
	CUDA_ONE_CALL_MAYBE_NULL.
	* plugin/plugin-nvptx.c (CUDA_VERSION < 6050): Define
	CUoccupancyB2DSize and declare
	cuOccupancyMaxPotentialBlockSize.
	(nvptx_exec): Use cuOccupancyMaxPotentialBlockSize to set the
	default num_gangs and num_workers when the driver supports it.

Co-Authored-By: Tom de Vries <tdevries@suse.de>

From-SVN: r263505