* doc/xml/manual/status_cxx2017.xml: Fix outdated reference to
	C++17 working draft.

From-SVN: r272500

The current tests wouldn't notice if the vector<bool> contents were
printed in reverse, because it would read the same forwards and
backwards. Change the content so the tests would fail if that happened.

	* testsuite/libstdc++-prettyprinters/simple.cc: Use non-palindromic
	vector<bool> for test.
	* testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.

From-SVN: r272499

2019-06-20  Martin Liska  <mliska@suse.cz>

	* params.def (PARAM_HASH_TABLE_VERIFICATION_LIMIT): Decrease
	to 10.

From-SVN: r272498

	* tree-vect-stmts.c (enum scan_store_kind): New type.
	(scan_store_can_perm_p): Change last argument from int * to
	vec<enum scan_store_kind> *, record precisely which permutations
	need whole vector left shift or that plus VEC_COND_EXPR.
	(vectorizable_scan_store): Adjust caller, use whole vector left shift
	and additional VEC_COND_EXPR only for those iterations that need it.

From-SVN: r272497

Fix the test for failure in parsecpu's checking of the --with-fpu
argument, and the error message that gets printed when the check
fails.

for  gcc/ChangeLog

	* config.gcc: Fix ARM --with-fpu checking and error message.

From-SVN: r272496

From-SVN: r272495

The current implementation of istream_iterator allows the iterator to be
reused after reaching end-of-stream, so that subsequent reads from the
stream can succeed (e.g. if the stream state has been cleared and stream
position changed from EOF). The P0738R2 paper clarified that the
expected behaviour is to set the stream pointer to null after reaching
end-of-stream, preventing further reads.

This implements that requirement, and adds the new default constructor
to std::ostream_iterator.

	* include/bits/stream_iterator.h (istream_iterator::_M_equal()): Make
	private.
	(istream_iterator::_M_read()): Do not check stream state before
	attempting extraction. Set stream pointer to null when extraction
	fails (P0738R2).
	(operator==(const istream_iterator&, const istream_iterator&)): Change
	to be a hidden friend of istream_iterator.
	(operator!=(const istream_iterator&, const istream_iterator&)):
	Likewise.
	(ostream_iterator::ostream_iterator()): Add default constructor.
	(ostream_iterator::ostream_iterator(ostream_type*, const C*)): Use
	addressof.
	* testsuite/24_iterators/istream_iterator/1.cc: New test.
	* testsuite/24_iterators/ostream_iterator/1.cc: New test.
	* testsuite/24_iterators/ostream_iterator/70766.cc: Also check
	constructor taking a string.
	* testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
	New test.

From-SVN: r272491

Have the pretty-printer for 'std::vector<bool>' return a
value of type 'bool' rather than an 'int'.

This way, the type is clear and that can be used for better
display and a 'gdb.Value' constructed from the returned value
will have type 'bool' again, not e.g. 'long long' as happened
previously (at least with GDB 8.2.1 on amd64).

2019-06-19  Michael Weghorn  <m.weghorn@posteo.de>
	    Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/90945
	* python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Use
	values of type bool for vector<bool> elements.
	* testsuite/libstdc++-prettyprinters/simple.cc: Test vector<bool>.
	* testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.

Co-Authored-By: Jonathan Wakely <jwakely@redhat.com>

From-SVN: r272490

The change in r263433 broke the contract of the __rotate functions, by no
longer accepting empty ranges. That means that callers which inlined the
old version of std::rotate (without checks) that end up linking to a new
definition of std::__rotate (also without checks) could perform a divide
by zero and crash.

This restores the old contract of the __rotate overloads.

	PR libstdc++/90920 partially revert r263433
	* include/bits/stl_algo.h (__rotate): Restore checks for empty ranges.
	(rotate): Remove checks.
	* testsuite/25_algorithms/rotate/90920.cc: New test.

From-SVN: r272489

re PR tree-optimization/90626 (fold strcmp(a, b) == 0 to zero when one string length is exact and the other is unequal)

PR tree-optimization/90626

gcc/ChangeLog:
	* tree-ssa-strlen.c (strxcmp_unequal): Fix typos.

From-SVN: r272487

	* attribs.c (get_attribute_namespace): No longer static.
	(decl_attributes): Avoid shadowing.  Preserve the C++11 form for C++11
	attributes.
	(attr_noreturn_exclusions): Make it extern.
	* attribs.h (get_attribute_namespace): Declare.
	* tree-inline.c (function_attribute_inlinable_p): Use
	get_attribute_name.

	* c-attribs.c (handle_noreturn_attribute): No longer static.
	* c-common.h (handle_noreturn_attribute, attr_noreturn_exclusions):
	Declare.
	* c-format.c (check_function_format): Use get_attribute_name.

	* decl.c (duplicate_decls): Give an error when a function is
	declared [[noreturn]] after its first declaration.
	* parser.c (cp_parser_std_attribute): Don't treat C++11 noreturn
	attribute as equivalent to GNU's.
	* tree.c (std_attribute_table): Add noreturn.

	* g++.dg/warn/noreturn-8.C: New test.
	* g++.dg/warn/noreturn-9.C: New test.
	* g++.dg/warn/noreturn-10.C: New test.
	* g++.dg/warn/noreturn-11.C: New test.

From-SVN: r272486

PR tree-optimization/90626 - fold strcmp(a, b) == 0 to zero when one string length is exact and the other is unequal

gcc/ChangeLog:

	PR tree-optimization/90626
	* tree-ssa-strlen.c (strxcmp_unequal): New function.
	(handle_builtin_string_cmp): Call it.

gcc/testsuite/ChangeLog:

	PR tree-optimization/90626
	* gcc.dg/strlenopt-65.c: New test.
	* gcc.dg/strlenopt-66.c: New test.
	* gcc.dg/strlenopt.h (strcmp, strncmp): Declare.

From-SVN: r272485

pie, no-pie and rdynamic are driver options, we can process them in the
relevant place and drop them once dealt with.  There's no need to generate
a new header to process the "no_compact_unwind" which is applied on the
basis of the target system.

Support for the -pie, -no_pie and -no_compact_unwind options should ideally
be checked at configure time, however the status quo is to assert that linkers
capable of targeting the relevant systems support these options (i.e. we trust
that the user doesn't attempt to configure inappropriately).

TODO: check the availability of the linker opts in configure rather than
trusting to the user.

This will fix the fail of pie-7.c, which is a result of failing to handle the
no-pie driver option.

2019-06-19  Iain Sandoe  <iain@sandoe.co.uk>

	* config/darwin.h (DRIVER_SELF_SPECS): Add RDYNAMIC, DARWIN_PIE_SPEC
	and DARWIN_NOPIE_SPEC.
	(RDYNAMIC): New, modified from DARWIN_EXPORT_DYNAMIC.
	(DARWIN_PIE_SPEC): Collate from darwin.h and darwin9.h.
	(DARWIN_NOPIE_SPEC): Collate from darwin10.h.
	(DARWIN_NOCOMPACT_UNWIND): New from darwin10.h
	(DARWIN_EXPORT_DYNAMIC): Delete.
	* config/darwin10.h (LINK_GCC_C_SEQUENCE_SPEC): Move no_compact_unwind
	and pie options processing to  darwin.h.
	* config/darwin9.h (DARWIN_PIE_SPEC): Move pie processing to darwin.h

From-SVN: r272484

gcc/c-family/ChangeLog:

	PR translation/90156
	* c-format.c (function_format_info::format_type): Adjust type.
	(function_format_info::is_raw): New member.
	(decode_format_type): Adjust signature.  Handle "raw" diag attributes.
	(decode_format_attr): Adjust call to decode_format_type.
	Avoid a redundant call to convert_format_name_to_system_name.
	Avoid abbreviating the word "arguments" in a diagnostic.
	(format_warning_substr): New function.
	(avoid_dollar_number): Quote dollar sign in a diagnostic.
	(finish_dollar_format_checking): Same.
	(check_format_info): Same.
	(struct baltoks_t): New.
	(c_opers, c_keywords, cxx_keywords, badwords, contrs): New arrays.
	(maybe_diag_unbalanced_tokens, check_tokens, check_plain): New
	functions.
	(check_format_info_main): Call check_plain.  Use baltoks_t.  Call
	maybe_diag_unbalanced_tokens.
	(handle_format_attribute): Spell out the word "arguments" in
	a diagnostic.

gcc/testsuite/ChangeLog:

	PR translation/90156
	* gcc.dg/format/gcc_diag-11.c: Enable.

From-SVN: r272483

2019-06-19  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/69499
	* match.c (gfc_match_select_type):  SELECT TYPE is an executable 
	statement, and cannot appear in MODULE or SUBMODULE scope.

2019-06-19  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/69499
	* gfortran.dg/pr69499.f90: New test.
	* gfortran.dg/module_error_1.f90: Update dg-error string.

From-SVN: r272482

2019-06-19  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/69398
	* decl.c (attr_decl): Check for duplicate DIMENSION attribute for a
	CLASS entity.

2019-06-19  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/69398
	* gfortran.dg/pr69398.f90: New test.

From-SVN: r272481

2019-06-19  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/87907
	* resolve.c (resolve_contained_fntype): Do not dereference a NULL
	pointer.

2019-06-19  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/87907
	* gfortran.dg/pr87907.f90: New testcase.

From-SVN: r272480

2019-06-19  Iain Sandoe  <iain@sandoe.co.uk>

        * config/darwin-driver.c (darwin_driver_init): Fix off-by-one errors
        in computing the number of options to be moved.

From-SVN: r272479

	*  config/arm/netbsd-elf.h (SYSARCH_ARM_SYNC_ICACHE): New definition.
	(CLEAR_INSN_CACHE) Use it.

From-SVN: r272478

	* include/std/numeric (reduce(Iter, Iter, T, BinOp)): Fix value
	category used in invocable check.
	(reduce(Iter, Iter, T)): Pass initial value as rvalue.
	* testsuite/26_numerics/reduce/2.cc: New test.

From-SVN: r272477

    
    runtime.concatstring{2,3,4,5} are just wrappers of concatstrings.
    These wrappers don't provide any benefit, at least in the C
    calling convention we use, where passing arrays by value isn't an
    efficient thing. Change it to always use concatstrings.
    
    Also, the cap field of the slice passed to concatstrings is not
    necessary. So change it to pass a pointer and a length directly,
    which is more efficient than passing a slice header by value.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/182539

From-SVN: r272476

	* config/i386/i386.md (cmpstrnsi): Remove dead code.

From-SVN: r272474

This fixes and simplifies the setjmp and non-local goto implementation.
Currently the virtual frame pointer is saved when using __builtin_setjmp or
a non-local goto.  Depending on whether a frame pointer is used, this may
either save SP or FP with an immediate offset.  However the goto or longjmp
always updates the hard frame pointer.

A receiver veneer in the original function then assigns the hard frame pointer
to the virtual frame pointer, which should, if it works correctly, again assign
SP or FP.  However the special elimination code in eliminate_regs_in_insn
doesn't do this correctly unless the frame pointer is used, and even if it
worked by writing SP, the frame pointer would still be corrupted.

A much simpler implementation is to always save and restore the hard frame
pointer.  This avoids 2 redundant instructions which add/subtract the virtual
frame offset.  A large amount of code can be removed as a result, including all
implementations of TARGET_BUILTIN_SETJMP_FRAME_VALUE (all of which already use
the hard frame pointer).  The expansion of nonlocal_goto on PA can be simplied
to just restore the hard frame pointer. 

This fixes the most obvious issues, however there are still issues on targets
which define HARD_FRAME_POINTER_IS_FRAME_POINTER (arm, mips).
Each function could have a different hard frame pointer, so a non-local goto
may restore the wrong frame pointer (TARGET_BUILTIN_SETJMP_FRAME_VALUE could
be useful for this).

The i386 TARGET_BUILTIN_SETJMP_FRAME_VALUE was incorrect: if stack_realign_fp
is true, it would save the hard frame pointer value but restore the virtual
frame pointer which according to ix86_initial_elimination_offset can have a
non-zero offset from the hard frame pointer.

The ia64 implementation of nonlocal_goto seems incorrect since the helper
function moves the the frame pointer value into the static chain register
(so this patch does nothing to make it better or worse).

AArch64 + x86-64 bootstrap OK, new test passes on AArch64, x86-64 and Arm.

gcc/
	PR middle-end/84521
	* builtins.c (expand_builtin_setjmp_setup): Save
	hard_frame_pointer_rtx.
	(expand_builtin_setjmp_receiver): Do not emit sfp = fp move since we
	restore fp.
	* function.c (expand_function_start): Save hard_frame_pointer_rtx for
	non-local goto.
	* lra-eliminations.c (eliminate_regs_in_insn): Remove sfp = fp
	elimination code.
	(remove_reg_equal_offset_note): Remove unused function.
	* reload1.c (eliminate_regs_in_insn): Remove sfp = hfp elimination
	code.
	* config/arc/arc.c (TARGET_BUILTIN_SETJMP_FRAME_VALUE): Remove.
	(arc_builtin_setjmp_frame_value): Remove function.
	* config/avr/avr.c  (TARGET_BUILTIN_SETJMP_FRAME_VALUE): Remove.
	(avr_builtin_setjmp_frame_value): Remove function.
	* config/i386/i386.c (TARGET_BUILTIN_SETJMP_FRAME_VALUE): Remove.
	(ix86_builtin_setjmp_frame_value): Remove function.
	* config/pa/pa.md (nonlocal_goto): Remove FP adjustment.
	* config/sparc/sparc.c (TARGET_BUILTIN_SETJMP_FRAME_VALUE): Remove.
	(sparc_builtin_setjmp_frame_value): Remove function.
	* config/vax/vax.c (TARGET_BUILTIN_SETJMP_FRAME_VALUE): Remove.
	(vax_builtin_setjmp_frame_value): Remove function.
	* config/xtensa/xtensa.c (xtensa_frame_pointer_required): Force frame
	pointer	if has_nonlocal_label.

testsuite/
	PR middle-end/84521
	* gcc.c-torture/execute/pr84521.c: New test.

From-SVN: r272473

	* doc/md.texi: Document vec_shl_<mode> pattern.
	* optabs.def (vec_shl_optab): New optab.
	* optabs.c (shift_amt_for_vec_perm_mask): Add shift_optab
	argument, if == vec_shl_optab, check for left whole vector shift
	pattern rather than right shift.
	(expand_vec_perm_const): Add vec_shl_optab support.
	* optabs-query.c (can_vec_perm_var_p): Mention also vec_shl optab
	in the comment.
	* tree-vect-generic.c (lower_vec_perm): Support permutations which
	can be handled by vec_shl_optab.
	* tree-vect-stmts.c (scan_store_can_perm_p): New function.
	(check_scan_store): Use it.
	(vectorizable_scan_store): If target can't do normal permutations,
	try to use whole vector left shifts and if needed a VEC_COND_EXPR
	after it.
	* config/i386/sse.md (vec_shl_<mode>): New expander.

	* gcc.dg/vect/vect-simd-8.c: If main is defined, don't include
	tree-vect.h nor call check_vect.
	* gcc.dg/vect/vect-simd-9.c: Likewise.
	* gcc.dg/vect/vect-simd-10.c: New test.
	* gcc.target/i386/sse2-vect-simd-8.c: New test.
	* gcc.target/i386/sse2-vect-simd-9.c: New test.
	* gcc.target/i386/sse2-vect-simd-10.c: New test.
	* gcc.target/i386/avx2-vect-simd-8.c: New test.
	* gcc.target/i386/avx2-vect-simd-9.c: New test.
	* gcc.target/i386/avx2-vect-simd-10.c: New test.
	* gcc.target/i386/avx512f-vect-simd-8.c: New test.
	* gcc.target/i386/avx512f-vect-simd-9.c: New test.
	* gcc.target/i386/avx512f-vect-simd-10.c: New test.

From-SVN: r272472

	* omp-low.c (lower_rec_input_clauses): Handle references properly
	in inscan clauses.
	(lower_omp_scan): Likewise.
cp/
	* cp-gimplify.c (cp_genericize_r): Handle OMP_CLAUSE_{IN,EX}CLUSIVE
	like OMP_CLAUSE_SHARED.
testsuite/
	* g++.dg/vect/simd-3.cc: New test.
	* g++.dg/vect/simd-4.cc: New test.
	* g++.dg/vect/simd-5.cc: New test.

From-SVN: r272471

From-SVN: r272470

2019-06-19  Martin Liska  <mliska@suse.cz>

	* bench-stringop: New file.

From-SVN: r272469

    
    For string concatenation, string to/from byte or rune slice
    conversion, and int to string conversion, if the result does not
    escape, we can allocate a small (32-element, or 4-byte for int to
    string) buffer on stack, and pass it to the runtime function. If
    the result fits in the buffer, it doesn't need to do a heap
    allocation.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/182538

From-SVN: r272468

2019-06-19  Jim MacArthur  <jim.macarthur@codethink.co.uk>
	    Mark Eggleston  <mark.eggleston@codethink.com>

	PR fortran/89103
	* gfortran.texi: Add -fdec-blank-format-item
	* invoke.texi: Add option to list of options.
	* invoke.texi: Add to section on Commas in FORMAT specifications.
	* io.c (check_format): At FMT_RPAREN goto finished if
	-fdec-blank-format-item otherwise set error string.
	* lang.opt: Add new option.
	* options.c (set_dec_flags): Add SET_BITFLAG for
	flag_dec_format_defaults.

	* gfortran.dg/dec_format_empty_item_1.f: New test.
	* gfortran.dg/dec_format_empty_item_2.f: New test.
	* gfortran.dg/dec_format_empty_item_3.f: New test.

Co-Authored-By: Mark Eggleston <mark.eggleston@codethink.com>

From-SVN: r272467

gcc/testsuite/ChangeLog:

2019-06-19  Kugan Vivekanandarajah  <kugan.vivekanandarajah@linaro.org>

	* gcc.target/aarch64/pr88834.c: Move from here...
	* gcc.target/aarch64/sve/pr88834.c: ...to here.

From-SVN: r272466

gcc/ChangeLog:

2019-06-19  Kugan Vivekanandarajah  <kugan.vivekanandarajah@linaro.org>

	* tree-ssa-address.c (preferred_mem_scale_factor): Handle when
	mem_mode is BLKmode.

From-SVN: r272465

From-SVN: r272464

    
    If a string([]byte) conversion is used immediately in a string
    concatenation, we don't need to copy the backing store of the
    byte slice, as the runtime function doesn't hold any reference
    to it.

    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/182437

	* go.dg/concatstring.go: New test.

From-SVN: r272460

These new (non-parallel) algorithms were added to C++17 along with the
parallel algorithms, but were missing from libstdc++.

	* include/bits/algorithmfwd.h: Change title of doc group.
	* include/bits/stl_algo.h (for_each_n): Add new C++17 algorithm from
	P0024R2.
	* include/bits/stl_numeric.h: Define doc group and add algos to it.
	* include/std/numeric (__is_random_access_iter): New internal trait.
	(reduce, transform_reduce, exclusive_scan, inclusive_scan)
	(transform_exclusive_scan, transform_inclusive_scan): Likewise.
	* testsuite/25_algorithms/for_each/for_each_n.cc: New test.
	* testsuite/26_numerics/exclusive_scan/1.cc: New test.
	* testsuite/26_numerics/inclusive_scan/1.cc: New test.
	* testsuite/26_numerics/reduce/1.cc: New test.
	* testsuite/26_numerics/transform_exclusive_scan/1.cc: New test.
	* testsuite/26_numerics/transform_inclusive_scan/1.cc: New test.
	* testsuite/26_numerics/transform_reduce/1.cc: New test.
	* testsuite/util/testsuite_iterators.h (test_container::size()): New
	member function.

From-SVN: r272459

Stack pointer adjustment code in prologue missed a case of no
callee-saved registers and a stack frame size bigger than 128 bytes.
Handle that case.

This fixes the following gcc tests with call0 ABI:
  gcc.c-torture/execute/stdarg-2.c
  gcc.dg/torture/pr55882.c
  gcc.dg/torture/pr57569.c

2019-06-18  Max Filippov  <jcmvbkbc@gmail.com>
gcc/
	* config/xtensa/xtensa.c (xtensa_expand_prologue): Add stack
	pointer adjustment for the case of no callee-saved registers and
	stack frame bigger than 128 bytes.

From-SVN: r272455

	gcc/fortran/
	PR fortran/90921
	* trans-decl.c (finish_oacc_declare): Reset module_oacc_clauses
	before scanning each namespace.
	gcc/testsuite/
	PR fortran/90921
	* gfortran.dg/goacc/declare-3.f95: Update.

From-SVN: r272454

[PR85221] Set 'omp declare target', 'omp declare target link' attributes for Fortran OpenACC 'declare'd variables

	gcc/fortran/
	PR fortran/85221
	* trans-decl.c (add_attributes_to_decl): Handle OpenACC 'declare'
	directive.
	gcc/testsuite/
	PR fortran/85221
	* gfortran.dg/goacc/declare-3.f95: New file.

From-SVN: r272453

[PR90859] Document status quo for "[OMP] Mappings for VLA different depending on 'target { c && { ! lp64 } }'"

	gcc/testsuite/
	PR middle-end/90859
	* c-c++-common/goacc/firstprivate-mappings-1.c: Update.

From-SVN: r272452

	gcc/testsuite/
	* c-c++-common/goacc/firstprivate-mappings-1.c: New file.
	* g++.dg/goacc/firstprivate-mappings-1.C: Likewise.
	libgomp/
	* testsuite/libgomp.oacc-c++/firstprivate-mappings-1.C: New file.
	* testsuite/libgomp.oacc-c-c++-common/firstprivate-mappings-1.c:
	Likewise.

From-SVN: r272451

..., which got garbled in r230275.

	include/
	* gomp-constants.h (enum gomp_map_kind): Fix description of
	'GOMP_MAP_FIRSTPRIVATE'.

From-SVN: r272450