This patch implements a -fdiagnostics-format=json option which
converts the diagnostics to be output to stderr in a JSON format;
see the documentation in invoke.texi.

Logically-related diagnostics are nested at the JSON level, using
the auto_diagnostic_group mechanism.

gcc/ChangeLog:
	PR other/19165
	* Makefile.in (OBJS): Move json.o to...
	(OBJS-libcommon): ...here and add diagnostic-format-json.o.
	* common.opt (fdiagnostics-format=): New option.
	(diagnostics_output_format): New enum.
	* diagnostic-format-json.cc: New file.
	* diagnostic.c (default_diagnostic_final_cb): New function, taken
	from start of diagnostic_finish.
	(diagnostic_initialize): Initialize final_cb to
	default_diagnostic_final_cb.
	(diagnostic_finish): Move "being treated as errors" messages to
	default_diagnostic_final_cb.  Call any final_cb.
	(default_diagnostic_finalizer): Add diagnostic_t param.
	(diagnostic_report_diagnostic): Pass "orig_diag_kind" to
	diagnostic_finalizer callback.
	* diagnostic.h (enum diagnostics_output_format): New enum.
	(diagnostic_finalizer_fn): Reimplement, adding diagnostic_t param.
	(struct diagnostic_context): Add "final_cb".
	(default_diagnostic_finalizer): Add diagnostic_t param.
	(diagnostic_output_format_init): New decl.
	* doc/invoke.texi (-fdiagnostics-format): New option.
	* dwarf2out.c (gen_producer_string): Ignore
	OPT_fdiagnostics_format_.
	* gcc.c (driver_handle_option): Handle OPT_fdiagnostics_format_.
	* lto-wrapper.c (append_diag_options): Ignore it.
	* opts.c (common_handle_option): Handle it.

gcc/c-family/ChangeLog:
	PR other/19165
	* c-opts.c (c_diagnostic_finalizer): Add diagnostic_t param.

gcc/fortran/ChangeLog:
	PR other/19165
	* error.c (gfc_diagnostic_finalizer): Add diagnostic_t param.

gcc/jit/ChangeLog:
	PR other/19165
	* dummy-frontend.c (jit_begin_diagnostic): Add diagnostic_t param.

gcc/testsuite/ChangeLog:
	PR other/19165
	* c-c++-common/diagnostic-format-json-1.c: New test.
	* c-c++-common/diagnostic-format-json-2.c: New test.
	* c-c++-common/diagnostic-format-json-3.c: New test.
	* c-c++-common/diagnostic-format-json-4.c: New test.
	* c-c++-common/diagnostic-format-json-5.c: New test.
	* gcc.dg/plugin/diagnostic_plugin_test_show_locus.c
	(custom_diagnostic_finalizer): Add diagnostic_t param.
	* gcc.dg/plugin/location_overflow_plugin.c
	(verify_unpacked_ranges): Likewise.
	(verify_no_columns): Likewise.
	* gfortran.dg/diagnostic-format-json-1.F90: New test.
	* gfortran.dg/diagnostic-format-json-2.F90: New test.
	* gfortran.dg/diagnostic-format-json-3.F90: New test.

From-SVN: r266186

gcc/ChangeLog:
	PR tree-optimization/88015
	* graphite-isl-ast-to-gimple.c
	(translate_isl_ast_to_gimple::scop_to_isl_ast): Add missing check
	for dump_enabled_p.
	* graphite-sese-to-poly.c (build_poly_scop): Likewise.

From-SVN: r266184

2018-11-15  Richard Biener  <rguenther@suse.de>

        PR middle-end/88029
        * gimple.c (gimple_call_flags): Union flags from decl, type
        and call fntype.
        * trans-mem.c (is_tm_pure_call): Simplify.

        * gcc.dg/tree-ssa/pr88029.c: New testcase.

From-SVN: r266183

2018-11-15  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/88031
	* tree-vect-loop.c (vectorizable_reduction): Move check
	for multiple types earlier so we get the expected dump.
	Simplify calls to vectorizable_condition.
	* tree-vect-stmts.h (vectorizable_condition): Update prototype.
	* tree-vect-stmts.c (vectorizable_condition): Instead of
	reduc_def and reduc_index take just a flag.  Simplify
	code-generation now that we can rely on the defs being set up.
	(vectorizable_comparison): Remove unused argument.

	* gcc.dg/pr88031.c: New testcase.

From-SVN: r266182

https://gcc.gnu.org/ml/gcc-patches/2018-11/msg01376.html
	* cp-tree.h (enum special_function_kind): Reorder and comment.
	* method.c (SFK_CTOR_P, SFK_DTOR_P, SFK_ASSIGN_P, SFK_COPY_P)
	(SFK_MOVE_P): New predicates.
	(walk_field_subobs, synthesized_method_base_walk): Drop
	copy_arg_p, move_p, assign_p args.  Use new SFK predicates.  Order
	parameters consistently.
	(synthesized_method_walk): Drop ctor_p, copy_arg_p, move_p,
	assign_p calculations.  Use new SFK predicates.  Adjust calls to
	worker functions.

From-SVN: r266180

Fix spaces in scan assembler tests.

    testsuite/
	* gcc.target/aarch64/pr62178.c: Fix spaces.

From-SVN: r266179

misc.c (gnat_init_gcc_eh): Do not override the switch -fnon-call-exceptions passed on the command line in...

	* gcc-interface/misc.c (gnat_init_gcc_eh): Do not override the switch
	-fnon-call-exceptions passed on the command line in -gnatp mode.

From-SVN: r266176

2018-11-15  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/88030
	* tree-complex.c (need_eh_cleanup): New global.
	(update_complex_assignment): Mark blocks that need EH update.
	(expand_complex_comparison): Likewise.
	(tree_lower_complex): Allocate and deallocate need_eh_cleanup,
	perform EH cleanup and schedule CFG cleanup if that did anything.

	* gcc.dg/tsan/pr88030.c: New testcase.

From-SVN: r266175

	PR rtl-optimization/88018
	* cfgrtl.c (fixup_abnormal_edges): Guard moving insns to fallthru edge
	on the presence of fallthru edge, rather than if it is a USE or not.

	* g++.dg/tsan/pr88018.C: New test.

From-SVN: r266174

2018-11-15  Richard Biener  <rguenther@suse.de>

	PR middle-end/87917
	* tree-data-ref.c (analyze_miv_subscript): Guard calls to
	analyze_subscript_affine_affine properly.

	* gcc.dg/tree-ssa/pr87917.c: New testcase.

From-SVN: r266173

2018-11-15  Xianmiao Qu  <xianmiao_qu@c-sky.com>

	gcc/
	* config/csky/csky-linux-elf.h (LINUX_DYNAMIC_LINKER): Remove.
	(GLIBC_DYNAMIC_LINKER): Define.
	(LINUX_TARGET_LINK_SPEC): Update the dynamic linker's name.

	libgcc/
	* config/csky/linux-unwind.h: Fix coding style.

From-SVN: r266172

	PR tree-optimization/84648
	* tree-ssa-loop-niter.c (adjust_cond_for_loop_until_wrap): New.
	(number_of_iterations_cond): Adjust exit cond for loop-until-wrap case
	by calling adjust_cond_for_loop_until_wrap.

	gcc/testsuite
	* gcc.dg/tree-ssa/pr84648.c: New test.
	* gcc.dg/pr68317.c: Add warning check on overflow.

From-SVN: r266171

2018-11-15  Sandra Loosemore  <sandra@codesourcery.com>

	PR other/56334

	gcc/
	* doc/extend.texi (Common Function Attributes): Clarify linker
	restrictions on "aligned" attribute.
	(Common Variable Attributes): Likewise.  Mention that linker
	restrictions don't apply to stack-allocated variables.

From-SVN: r266170

        * gensupport.c (add_predicate_code): Properly handle ZERO_EXTRACT
        as an lvalue.

From-SVN: r266169

2018-11-14  Sandra Loosemore  <sandra@codesourcery.com>

	PR lto/55102
	PR lto/56700

	gcc/
	* doc/invoke.texi (Optimize Options): Remove bad example about
	interaction between -flto and -O.  Replace it with a note that
	you need to compile with -O and not just link.  Copy-edit -flto
	discussion to reduce verbiage and improve flow.

From-SVN: r266168

From-SVN: r266167

A recent change caused a performance regression. This restores the
previous performance and adds a performance test.

	* scripts/check_performance: Allow tests to choose a -std flag.
	* src/c++17/memory_resource.cc (bitset::get_first_unset()): Use local
	variables of the right types. Call update_next_word() unconditionally.
	* testsuite/20_util/unsynchronized_pool_resource/cons.cc: New test.
	* testsuite/performance/20_util/memory_resource/pools.cc: New test.
	* testsuite/util/testsuite_performance.h (time_counter): Allow
	timer to be restarted.

From-SVN: r266164

	* testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Fix
	test for 32-bit targets. Test additional allocation sizes.

From-SVN: r266163

2018-11-14  Sandra Loosemore  <sandra@codesourcery.com>

	PR middle-end/59658

	gcc/
	* doc/invoke.texi (Optimize Options): Clarify that -O0 and -Og
	also suppress many optimizations.  Alphabetize option lists for
	-O1, -O2, and -Os.  Add list of options disabled with -Og, and
	correct documentation for those options to say that.
	* opts.c (default_options_table): Sort table by level and option
	name, to make it easier to correlate to the manual.

From-SVN: r266162

	* config/i386/i386.c (ix86_print_operand_address_as): Simplify
	printing of the names of segment registers.

From-SVN: r266161

https://gcc.gnu.org/ml/gcc-patches/2018-11/msg01280.html
	PR debug/88006
	PR debug/87462
	* dwarf2out.c (dwarf2out_finish): Apply resolve_addr to comdat
	type list.

	* g++.dg/debug/dwarf2/pr87462.C: New.
	* g++.dg/debug/dwarf2/pr88006.C: New.

From-SVN: r266158

gcc/ChangeLog:
	* Makefile.in (CFLAGS-optinfo-emit-json.o): Add $(ZLIBINC).

From-SVN: r266156

/cp
2018-11-14  Paolo Carlini  <paolo.carlini@oracle.com>

	* parser.c (make_id_declarator): Add location_t parameter.
	(cp_parser_lambda_declarator_opt): Adjust call.
	(cp_parser_decomposition_declaration): Likewise.
	(cp_parser_alias_declaration): Likewise.
	(cp_parser_direct_declarator): Likewise.
	(cp_parser_member_declaration): Likewise.
	(cp_parser_objc_class_ivars): Likewise.
	* decl.c (grokdeclarator): Use declarator->id_loc in two error
	messages.

/testsuite
2018-11-14  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/cpp0x/nsdmi-union6.C: Test locations too.
	* g++.dg/cpp0x/nsdmi6.C: Likewise.
	* g++.dg/ext/flexary4.C: Likewise.
	* g++.dg/ext/flexary9.C: Likewise.
	* g++.dg/other/incomplete2.C: Likewise.
	* g++.dg/parse/friend12.C: Likewise.

From-SVN: r266155

	* gcc_update (files_and_dependencies): Handle libphobos.

From-SVN: r266154

	P1236R1 - Signed integers are two's complement
gcc/cp/
	* constexpr.c (cxx_eval_check_shift_p): Disable the signed LSHIFT_EXPR
	checks for c++2a.
gcc/c-family/
	* c-warn.c (maybe_warn_shift_overflow): Don't warn for c++2a.
	* c-ubsan.c (ubsan_instrument_shift): Make signed shifts
	with in-range second operand well defined for -std=c++2a.
gcc/
	* doc/invoke.texi (Wshift-overflow): Adjust documentation for
	c++2a.
gcc/testsuite/
	* g++.dg/cpp2a/constexpr-shift1.C: New test.
	* g++.dg/warn/permissive-1.C (enum A, enum D): Don't expect
	diagnostics here for c++2a.
	* g++.dg/cpp0x/constexpr-shift1.C (fn3, i3, fn4, i4): Don't expect
	diagnostics here for c++2a.
	* g++.dg/cpp0x/constexpr-60049.C (f3, x3, y3): Likewise.
	* g++.dg/ubsan/cxx11-shift-1.C (main): Add some further tests.
	* g++.dg/ubsan/cxx11-shift-2.C (main): Likewise.
	* g++.dg/ubsan/cxx2a-shift-1.C: New test.
	* g++.dg/ubsan/cxx2a-shift-2.C: New test.

From-SVN: r266153

	PR bootstrap/86739
	* hash-map.h (hash_map::iterator::reference_pair): New class.
	(hash_map::iterator::operator*): Return it rather than std::pair.

From-SVN: r266152

	* optabs.c (expand_binop): Pass INT_MODE to operand_subword_force
	iff the operand is a constant.

	* gcc.c-torture/compile/20181114.c: New test.

2018-11-14  Ilya Leoshkevich  <iii@linux.ibm.com>

From-SVN: r266151

	(evrp_range_analyzer::record_ranges_from_incoming_edge): Rename
	ignore_equivs_equal_p to equal_p.
	* ipa-cp.c (meet_with_1): Use equal_p instead of
	ignore_equivs_equal_p.
	* ipa-prop.c (ipa_vr_ggc_hash_traits::equal): Same.
	* tree-vrp.c (value_range::ignore_equivs_equal_p): Remove.
	(value_range::operator==): Remove.
	(value_range::operator!=): Remove.
	(vrp_prop::visit_stmt): Use equal_p.
	* tree-vrp.h (value_range): Remove operator==, operator!=,
	ignore_equivs_equal_p.
	* vr-values.c (update_value_range): Use equal_p.

From-SVN: r266150

From-SVN: r266149

Fix PR middle-end/86575

	PR middle-end/86575
	* gimplify.c (collect_fallthrough_labels): Add new argument,
	return location via that, don't modify statements.
	(warn_implicit_fallthrough_r): Adjust call, don't use
	statement location directly.

From-SVN: r266148

2018-11-14  Richard Biener  <rguenther@suse.de>

	PR middle-end/87985
	* tree-data-ref.c (split_constant_offset): Add wrapper
	allocating a cache hash-map.
	(split_constant_offset_1): Cache results of expanding
	expressions from SSA def stmts.

	* gcc.dg/pr87985.c: New testcase.

From-SVN: r266147

	* scripts/create_testsuite_files: Add special_functions to the list
	of directories to search. Add comment referring to conformance.exp.
	* testsuite/libstdc++-dg/conformance.exp: Add comment referring
	to create_testsuite_files.

From-SVN: r266146

 mode

The emitted address is .long, not .quad, in that case.

gcc/testsuite/ChangeLog:

2018-11-14  Ilya Leoshkevich  <iii@linux.ibm.com>

	* gcc.target/s390/mrecord-mcount.c (profileme): Expect .long in
	31-bit mode.

From-SVN: r266145

These tests rely on larl->movdi merge, which is not implemented for
31-bit mode.

gcc/testsuite/ChangeLog:

2018-11-14  Ilya Leoshkevich  <iii@linux.ibm.com>

	* gcc.target/s390/global-array-almost-huge-element.c: Run only
	in 64-bit mode.
	* gcc.target/s390/global-array-almost-negative-huge-element.c:
	Likewise.
	* gcc.target/s390/global-array-even-element.c: Likewise.

From-SVN: r266144

2018-11-14  Richard Biener  <rguenther@suse.de>

	PR middle-end/88021
	* tree-data-ref.c (lambda_matrix_row_add): Change const1 argument
	to lambda_int.
	(lambda_vector_mult_const): Likewise.
	(lambda_matrix_right_hermite): Use lambda_int temporaries.

From-SVN: r266143

This patch implements some of the optimizations discussed in PR71026.

Simplify (C / x >= 0.0) into x >= 0.0 with -funsafe-math-optimizations
(since C / x can underflow to zero if x is huge, it's not safe otherwise).
If C is negative the comparison is reversed.

Simplify (x * C1) > C2 into x > (C2 / C1) with -funsafe-math-optimizations.
If C1 is negative the comparison is reversed.

    gcc/
	PR 71026/tree-optimization
	* match.pd: Simplify floating point comparisons.

    gcc/testsuite/
	PR 71026/tree-optimization
	* gcc.dg/div-cmp-1.c: New test.
	* gcc.dg/div-cmp-2.c: New test.

Co-Authored-By: Jackson Woodruff <jackson.woodruff@arm.com>

From-SVN: r266142

	PR other/88007
	* c-common.c (parse_optimize_options): Allocate option string from
	opts_obstack rather than as GC memory.  Move the allocation after
	warning for invalid option.

	* gcc.dg/pr88007.c: New test.

From-SVN: r266141

	PR rtl-optimization/87817
	* config/i386/i386.c (ix86_fold_builtin): For _bzhi_u{32,64} if
	last argument has low 8 bits clear, fold to 0.

	* gcc.target/i386/bmi2-bzhi-3.c (main): Add a couple of new tests.

From-SVN: r266140

The testcase for PR62178 has been failing for a while due to the pass
conditions being too tight, resulting in failures with -mcmodel=tiny:

	ldr	q2, [x0], 124
	ld1r	{v1.4s}, [x1], 4
	cmp	x0, x2
	mla	v0.4s, v2.4s, v1.4s
	bne	.L7

-mcmodel=small generates the slightly different:

	ldr	q1, [x0], 124
	ldr	s2, [x1, 4]!
	cmp	x0, x2
	mla	v0.4s, v1.4s, v2.s[0]
	bne	.L7

This is due to Combine merging a DUP instruction with either a load
or MLA - we can't force it to prefer one over the other.  However the
generated vector loop is fast either way since it generates MLA and
merges the DUP either with a load or MLA.  So relax the conditions
slightly and check we still generate MLA and there is no DUP or FMOV.

The testcase now passes - committed as obvious.

    testsuite/
	* gcc.target/aarch64/pr62178.c: Relax scan-assembler checks.

From-SVN: r266139

gcc/

	* tree-vect-data-refs.c (vect_can_force_dr_alignment_p): Cast
	MAX_OFILE_ALIGNMENT as needed.

From-SVN: r266138