[8/n] PR85694: Make patterns check for target support

This patch makes pattern recognisers do their own checking for vector
types and target support.  Previously some recognisers did this
themselves and some left it to vect_pattern_recog_1.

Doing this means we can get rid of the type_in argument, which was
ignored if the recogniser did its own checking.  It also means
we create fewer junk statements.

2018-06-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-vectorizer.h (NUM_PATTERNS, vect_recog_func_ptr): Move to
tree-vect-patterns.c.
* tree-vect-patterns.c (vect_supportable_direct_optab_p): New function.
(vect_recog_dot_prod_pattern): Use it.  Remove the type_in argument.
(vect_recog_sad_pattern): Likewise.
(vect_recog_widen_sum_pattern): Likewise.
(vect_recog_pow_pattern): Likewise.  Check for a null vectype.
(vect_recog_widen_shift_pattern): Remove the type_in argument.
(vect_recog_rotate_pattern): Likewise.
(vect_recog_mult_pattern): Likewise.
(vect_recog_vector_vector_shift_pattern): Likewise.
(vect_recog_divmod_pattern): Likewise.
(vect_recog_mixed_size_cond_pattern): Likewise.
(vect_recog_bool_pattern): Likewise.
(vect_recog_mask_conversion_pattern): Likewise.
(vect_try_gather_scatter_pattern): Likewise.
(vect_recog_widen_mult_pattern): Likewise.  Check for a null vectype.
(vect_recog_over_widening_pattern): Likewise.
(vect_recog_gather_scatter_pattern): Likewise.
(vect_recog_func_ptr): Move from tree-vectorizer.h
(vect_vect_recog_func_ptrs): Move further down the file.
(vect_recog_func): Likewise.  Remove the third argument.
(NUM_PATTERNS): Define based on vect_vect_recog_func_ptrs.
(vect_pattern_recog_1): Expect the pattern function to do any
necessary target tests.  Also expect it to provide a vector type.
Remove the type_in handling.

From-SVN: r261791

[7/n] PR85694: Add a vect_pattern_detected helper

This message is a long write-up for a patch that simply adds a common
routine for printing the "vector_foo_pattern: detected:" messages.

The reason for doing this is that some routines check for target support
themselves and some leave it to vect_pattern_recog_1.  Those that leave
it to vect_pattern_recog_1 currently print these "detected:" messages if
the statements have the right form, even if the pattern is eventually
discarded.  IMO that's useful, and a lot of existing scan tests rely on it.

However, a later patch makes patterns do their own testing, and stops
them creating pattern statements until the tests have passed.  This means
(a) they need to print the "detected:" message earlier and (b) the pattern
statement won't be around to print.

The patch therefore makes all routines print the original statement
rather than the pattern one.  That information isn't obvious otherwise,
whereas vect_pattern_recog_1 already prints the pattern statement
in the case of a successful match.  This also avoids the previous
situation in which a routine could print "detected:" and then
silently bail out before saying what had been detected.

2018-06-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-vect-patterns.c (vect_pattern_detected): New function.
(vect_recog_dot_prod_patternm, vect_recog_sad_pattern)
(vect_recog_widen_mult_pattern, vect_recog_widen_sum_pattern)
(vect_recog_over_widening_pattern, vect_recog_widen_shift_pattern
(vect_recog_rotate_pattern, vect_recog_vector_vector_shift_pattern)
(vect_recog_mult_pattern, vect_recog_divmod_pattern)
(vect_recog_mixed_size_cond_pattern, vect_recog_bool_pattern)
(vect_recog_mask_conversion_pattern)
(vect_try_gather_scatter_pattern): Likewise.

From-SVN: r261790

[6/n] PR85694: Add a vect_get_internal_def helper

This patch adds a helper for pattern code that wants to find an
internal (vectorisable) definition of an SSA name.

A later patch will make more use of this, and alter the definition.

2018-06-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-vect-patterns.c (vect_get_internal_def): New function.
(vect_recog_dot_prod_pattern, vect_recog_sad_pattern)
(vect_recog_vector_vector_shift_pattern, check_bool_pattern)
(search_type_for_mask_1): Use it.

From-SVN: r261789

[5/n] PR85694: Remove dead WIDEN_SUM handling

vect_recog_dot_prod_pattern and vect_recog_sad_pattern both checked
whether the statement passed in had already been recognised as a
WIDEN_SUM_EXPR pattern.  That isn't possible (any more?), since the
first recognised pattern wins, and since vect_recog_widen_sum_pattern
never matches a later statement than the one it's given.

2018-06-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-vect-patterns.c (vect_recog_dot_prod_pattern): Remove
redundant WIDEN_SUM_EXPR handling.
(vect_recog_sad_pattern): Likewise.

From-SVN: r261788

[4/n] PR85694: Remove redundant calls to types_compatible_p

tree-vect-patterns.c checked that operands to primitive arithmetic ops
are compatible with each other and with the result.  The checks date
back years and have long been redundant with verify_gimple_stmt.

2018-06-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-vect-patterns.c (vect_recog_dot_prod_pattern): Remove
redundant check that the types of a PLUS_EXPR or MULT_EXPR agree.
(vect_recog_sad_pattern): Likewise PLUS_EXPR, ABS_EXPR and MINUS_EXPR.
(vect_recog_widen_mult_pattern): Likewise MULT_EXPR.
(vect_recog_widen_sum_pattern): Likewise PLUS_EXPR.

From-SVN: r261787

[3/n] PR85694: Fix dummy assignment handling in vectorizable_call

vectorizable_call stubs out the original scalar statement with
a dummy assignment to the same lhs, so that we don't leave any bogus
scalar calls around.  If the call is actually a pattern statement,
the code rightly took the lhs of the original bb statement:

  if (is_pattern_stmt_p (stmt_info))
    lhs = gimple_call_lhs (STMT_VINFO_RELATED_STMT (stmt_info));
  else
    lhs = gimple_call_lhs (stmt);

But it then associated the new statement with the stmt_vec_info of the
pattern statement rather than the bb statement, which meant we had two
stmt_vec_infos assigning to the same lhs.  This seems to be latent at
the moment but caused problems further into the series.

2018-06-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-vect-stmts.c (vectorizable_call): Make sure that we
use the stmt_vec_info of the original bb statement for the
new zero assignment, even if the call is part of a pattern.

From-SVN: r261786

[2/n] PR85694: Attach a DEF_SEQ only to the original statement

A pattern's PATTERN_DEF_SEQ was attached to both the original statement
and the main pattern statement, which made it harder to update later.
This patch attaches it to just the original statement.  In practice,
anything that cared had ready access to both.

2018-06-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-vectorizer.h (_stmt_vec_info): Note above pattern_def_seq
that the sequence is attached to the original statement rather
than the pattern statement.
* tree-vect-loop.c (vect_determine_vf_for_stmt): Take the
PATTERN_DEF_SEQ from the original statement rather than
the main pattern statement.
* tree-vect-stmts.c (free_stmt_vec_info): Likewise.
* tree-vect-patterns.c (vect_recog_dot_prod_pattern): Likewise.
(vect_mark_pattern_stmts): Don't copy the PATTERN_DEF_SEQ.

From-SVN: r261785

[1/n] PR85694: Allow pattern definition statements to be reused

This patch is the first part of a series to fix to PR85694.
Later patches can make the pattern for a statement S2 reuse the
results of a PATTERN_DEF_SEQ statement attached to an earlier
statement S1.  Although vect_mark_stmts_to_be_vectorized handled
this fine, vect_analyze_stmt and vect_transform_loop both skipped the
PATTERN_DEF_SEQ for S1 if S1's main pattern wasn't live or relevant.

I couldn't wrap my head around the flow in vect_transform_loop,
so ended up moving the per-statement handling into a subroutine.
That makes the patch look bigger than it actually is.

2018-06-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-vect-stmts.c (vect_analyze_stmt): Move the handling of pattern
definition statements before the early exit for statements that aren't
live or relevant.
* tree-vect-loop.c (vect_transform_loop_stmt): New function,
split out from...
(vect_transform_loop): ...here.  Process pattern definition
statements without first checking whether the main pattern
statement is live or relevant.

From-SVN: r261784

Daily bump.

From-SVN: r261779

Wrap is_static with COLLECT_EXPORT_LIST

From-SVN: r261775

PR middle-end/85602 - -Warray-bounds fails to detect the out of bound array access

gcc/testsuite/ChangeLog:
  * c-c++-common/attr-nonstring-8.c: Adjust text of expected warning
  to also match C++.

From-SVN: r261774

tree-cfgcleanup.c (tree_forwarder_block_p): Do not return false at -O0 if the locus represent UNKNOWN_LOCATION but have...

* tree-cfgcleanup.c (tree_forwarder_block_p): Do not return false at
-O0 if the locus represent UNKNOWN_LOCATION but have different values.

From-SVN: r261770

rs6000-string.c (select_block_compare_mode): Check TARGET_EFFICIENT_OVERLAPPING_UNALIGNED here instead of in caller.

2018-06-19  Aaron Sawdey  <acsawdey@linux.ibm.com>

* config/rs6000/rs6000-string.c (select_block_compare_mode): Check
TARGET_EFFICIENT_OVERLAPPING_UNALIGNED here instead of in caller.
(do_and3, do_and3_mask, do_compb3, do_rotl3): New functions.
(expand_block_compare): Change select_block_compare_mode call.
(expand_strncmp_align_check): Use new functions, fix comment.
(emit_final_str_compare_gpr): New function.
(expand_strn_compare): Refactor and clean up code.
* config/rs6000/vsx.md (vsx_mov<mode>_64bit): Remove *.

From-SVN: r261769

collect2.c (static_obj): New variable.

2018-06-19  Tony Reix  <tony.reix@atos.com>
            Damien Bergamini  <damien.bergamini@atos.com>
            David Edelsohn  <dje.gcc@gmail.com>

        * collect2.c (static_obj): New variable.
        (static_libs): New variable.
        (is_in_list): Uncomment declaration.
        (main): Track AIX libraries linked statically.
        (is_in_list): Uncomment definition.
        (scan_prog_file): Don't add AIX shared libraries initializer
        to constructor list if linking statically.

Co-Authored-By: Damien Bergamini <damien.bergamini@atos.com>
Co-Authored-By: David Edelsohn <dje.gcc@gmail.com>
From-SVN: r261759

cp-tree.h (CONSTRUCTOR_NO_IMPLICIT_ZERO): Remove.

* cp-tree.h (CONSTRUCTOR_NO_IMPLICIT_ZERO): Remove.

* constexpr.c: Use CONSTRUCTOR_NO_CLEARING instead.

From-SVN: r261758

PR c++/86192 - ICE with anonymous union passed to template.

* pt.c (tsubst_expr) [DECL_EXPR]: Handle an anonymous union type
used to declare a named variable.

From-SVN: r261757

xtensa: fix PR target/65416

The issue is caused by reordering of stack pointer update after stack
space allocation with instructions that write to the allocated stack
space. In windowed ABI register spill area for the previous call frame
is located just below the stack pointer and may be reloaded back into
the register file on movsp.
Implement allocate_stack pattern for windowed ABI configuration and
insert an instruction that prevents reordering of frame memory access
and stack pointer update.

gcc/
2018-06-19  Max Filippov  <jcmvbkbc@gmail.com>

* config/xtensa/xtensa.md (UNSPEC_FRAME_BLOCKAGE): New unspec
constant.
(allocate_stack, frame_blockage, *frame_blockage): New patterns.

From-SVN: r261755

re PR middle-end/85602 (-Wsizeof-pointer-memaccess for strncat with size of source)

gcc/testsuite/ChangeLog:

PR middle-end/85602
* c-c++-common/attr-nonstring-8.c: Adjust text of expected warning
to also match C++.

From-SVN: r261751

Remove unused <exception> header from <utility>

This header was needed for the declaration of std::terminate but the
calls to it were removed in r242401.

* include/std/utility: Remove unused <exception> header.

From-SVN: r261749

tree.c (find_decls_types_r): Remove all non-VAR_DECLs from blocks.

* tree.c (find_decls_types_r): Remove all non-VAR_DECLs from
blocks.
* g++.dg/lto/pr84805_0.C: Update template.
* g++.dg/lto/pr84805_1.C: Update template.

From-SVN: r261748

* es.po: Update.

From-SVN: r261745

Clean-up usage of ipa_fn_summary and ipa_call_summary summaries.

2018-06-19  Martin Liska  <mliska@suse.cz>

* config/i386/i386.c (ix86_can_inline_p): Do not use
        ipa_fn_summaries::get_create.
* ipa-cp.c (ipcp_cloning_candidate_p): Replace get_create with
        get.
(devirtualization_time_bonus): Likewise.
(ipcp_propagate_stage): Likewise.
* ipa-fnsummary.c (redirect_to_unreachable): Likewise.
(edge_set_predicate): Likewise.
(evaluate_conditions_for_known_args): Likewise.
(evaluate_properties_for_edge): Likewise.
(ipa_call_summary::reset): Tranform to ...
(ipa_call_summary::~ipa_call_summary): ... this.
(ipa_fn_summary::reset): Transform to ...
(ipa_fn_summary::~ipa_fn_summary): ... this.
(ipa_fn_summary_t::remove): Rename to ...
(ipa_fn_summary_t::remove_callees): ... this.
(ipa_fn_summary_t::duplicate): Use placement new
        instead of memory copy.
(ipa_call_summary_t::duplicate): Likewise.
(ipa_call_summary_t::remove): Remove.
(dump_ipa_call_summary): Change get_create to get.
(ipa_dump_fn_summary): Dump only when summary exists.
(analyze_function_body): Use symbol_summary::get instead
        of get_create.
(compute_fn_summary): Likewise.
(estimate_edge_devirt_benefit): Likewise.
(estimate_edge_size_and_time): Likewise.
(inline_update_callee_summaries): Likewise.
(remap_edge_change_prob): Likewise.
(remap_edge_summaries): Likewise.
(ipa_merge_fn_summary_after_inlining): Likewise.
(write_ipa_call_summary): Likewise.
(ipa_fn_summary_write): Likewise.
(ipa_free_fn_summary): Likewise.
* ipa-fnsummary.h (struct GTY): Add new ctor and copy ctor.
(struct ipa_call_summary): Likewise.
* ipa-icf.c (sem_function::merge): Use symbol_summary::get instead
        of get_create.
* ipa-inline-analysis.c (do_estimate_edge_time): Likewise.
(estimate_size_after_inlining): Likewise.
(estimate_growth): Likewise.
(growth_likely_positive): Likewise.
* ipa-inline-transform.c (clone_inlined_nodes): Likewise.
(inline_call): Likewise.
* ipa-inline.c (caller_growth_limits): Likewise.
(can_inline_edge_p): Likewise.
(can_inline_edge_by_limits_p): Likewise.
(compute_uninlined_call_time): Likewise.
(compute_inlined_call_time): Likewise.
(want_inline_small_function_p): Likewise.
(edge_badness): Likewise.
(update_caller_keys): Likewise.
(update_callee_keys): Likewise.
(inline_small_functions): Likewise.
(inline_to_all_callers_1): Likewise.
(dump_overall_stats): Likewise.
(early_inline_small_functions): Likewise.
(early_inliner): Likewise.
* ipa-profile.c (ipa_propagate_frequency_1): Likewise.
* ipa-prop.c (ipa_make_edge_direct_to_target): Likewise.
* ipa-pure-const.c (malloc_candidate_p): Likewise.
* ipa-split.c (execute_split_functions): Likewise.
* symbol-summary.h: Likewise.
* tree-sra.c (ipa_sra_preliminary_function_checks): Likewise.
2018-06-19  Martin Liska  <mliska@suse.cz>

* lto-partition.c (add_symbol_to_partition_1): Use symbol_summary::get instead
        of get_create.
(undo_partition): Likewise.
(lto_balanced_map): Likewise.

From-SVN: r261744

Improve gimple.vim syntax file.

From-SVN: r261742

Add initial version of rtl.vim syntax file.

2018-06-19  Martin Liska  <mliska@suse.cz>

* gcc-rtl.vim: New file.

From-SVN: r261741

tree-vectorizer.c (try_vectorize_loop_1): Split out of ...

2018-06-19  Richard Biener  <rguenther@suse.de>

* tree-vectorizer.c (try_vectorize_loop_1): Split out of ...
(vectorize_loops): ... here.  Fix dbgcnt handling.
(try_vectorize_loop): Wrap try_vectorize_loop_1.

From-SVN: r261740

Allow building of the zlib component when the building takes place in the source directory.

* zlib/configure.ac: Restore old behaviour of only enabling
multilibs when a target subdirectory is defined.  This allows
building with srcdir == builddir.
* zlib/configure: Regenerate.

From-SVN: r261739

rs6000: Fix vector homogeneous aggregates (PR86197)

The existing code allows only 4 vectors worth of ieee128 homogeneous
aggregates, but it should be 8.  This happens because at one spot it
is mistakenly qualified as being passed in floating point registers.

PR target/86197
* config/rs6000/rs6000.md (rs6000_discover_homogeneous_aggregate): An
ieee128 argument takes up only one (vector) register, not two (floating
point) registers.

From-SVN: r261738

gimplify.c (gimplify_init_constructor): Really never clear for an incomplete constructor if CONSTRUCTOR_NO_CLEARING is set.

* gimplify.c (gimplify_init_constructor): Really never clear for an
incomplete constructor if CONSTRUCTOR_NO_CLEARING is set.

From-SVN: r261735

Remove unused stagestuff in config-lang.in.

2018-06-19  Martin Liska  <mliska@suse.cz>

* config-lang.in: Remove stagestuff.

From-SVN: r261733

re PR tree-optimization/86179 (ice in get_later_stmt, at tree-vectorizer.h:1108)

2018-06-19  Richard Biener  <rguenther@suse.de>

PR tree-optimization/86179
* tree-vect-patterns.c (vect_pattern_recog_1): Clean up
after failed recognition.

* gcc.dg/pr86179.c: New testcase.

From-SVN: r261731

tree.c (cp_expr_location): New.

* tree.c (cp_expr_location): New.

* cp-tree.h (cp_expr_loc_or_loc): New.
* call.c, cvt.c, constexpr.c, constraint.cc, cp-gimplify.c, decl.c,
error.c, init.c, lex.c, parser.c, pt.c, semantics.c, typeck.c,
typeck2.c: Use it instead of EXPR_LOC_OR_LOC.

From-SVN: r261728

Use a range for LAMBDA_EXPR_LOCATION.

* parser.c (cp_parser_lambda_expression): Use a range for
LAMBDA_EXPR_LOCATION.

From-SVN: r261727

PR c++/86200 - ICE with unexpanded pack in lambda parameter.

* pt.c (find_parameter_packs_r) [LAMBDA_EXPR]: Also look into the
function type.

From-SVN: r261726

PR c++/81060 - ICE with unexpanded parameter pack.

* pt.c (check_for_bare_parameter_packs): Add loc parameter.
* decl.c (grokdeclarator): Call it for qualifying_scope.

From-SVN: r261725

Daily bump.

From-SVN: r261724

PR middle-end/85602 - -Wsizeof-pointer-memaccess for strncat with size of source

gcc/c-family/ChangeLog:

PR middle-end/85602
* c-warn.c (sizeof_pointer_memaccess_warning): Check for attribute
nonstring.

gcc/ChangeLog:

PR middle-end/85602
* calls.c (maybe_warn_nonstring_arg): Handle strncat.
* tree-ssa-strlen.c (is_strlen_related_p): Make extern.
Handle integer subtraction.
(maybe_diag_stxncpy_trunc): Handle nonstring source arguments.
* tree-ssa-strlen.h (is_strlen_related_p): Declare.

gcc/testsuite/ChangeLog:

PR middle-end/85602
* gcc.dg/attr-nonstring-2.c: Adjust text of expected warning.
* c-c++-common/attr-nonstring-8.c: New test.

From-SVN: r261718

Makefile.def (fortran): Add check-target-libgomp-fortran.

* Makefile.def (fortran): Add check-target-libgomp-fortran.
* Makefile.tpl (check-target-libgomp-fortran): New phony target.
* Makefile.in: Regenerate.

From-SVN: r261717

LWG 2975 ensure construct(pair<T,U>*, ...) used to construct pairs

* include/std/scoped_allocator (__not_pair): Define SFINAE helper.
(construct(_Tp*, _Args&&...)): Remove from overload set when _Tp is
a specialization of std::pair.
* testsuite/20_util/scoped_allocator/construct_pair.cc: Ensure
pair elements are constructed correctly.

From-SVN: r261716

More rtx to rtx_insn * cleanups

gcc/ChangeLog:
* config/frv/frv-protos.h (frv_ifcvt_modify_insn): Strengthen 3rd
param from rtx to rtx_insn *.
* config/frv/frv.c (frv_ifcvt_add_insn): Likewise for "insn"
param.
(frv_ifcvt_modify_insn): Likwise.
(frv_ifcvt_modify_final): Likwise for local "existing_insn",
adding an as_a <rtx_insn *> cast.  Likewise for local "insn".
* config/mips/mips.c (r10k_insert_cache_barriers): Add an
as_a <rtx_insn *> cast to local "unprotected_region" once
it's been established that it's not NULL or pc_rtx.
* config/nds32/nds32-relax-opt.c (nds32_group_insns): Strengthen
param "sethi" from rtx to rtx_insn *.
(nds32_group_float_insns): Likewise for param "insn".
* config/vax/vax-protos.h (vax_output_int_add): Likewise for 1st
param.
(vax_output_int_subtract): Likewise.
* config/vax/vax.c (vax_output_int_add): Likewise for param
"insn".
(vax_output_int_subtract): Likewise.
* emit-rtl.c (set_insn_deleted): Likewise, removing cast.
(emit_pattern_after): Likewise for param "after".
(emit_insn_after): Likewise.
(emit_jump_insn_after): Likewise.
(emit_call_insn_after): Likewise.
(emit_debug_insn_after): Likewise.
(emit_pattern_before): Likewise for param "before".
(emit_insn_before): Likewise.
(emit_jump_insn_before): Likewise.
* final.c (get_insn_template): Likewise for param "insn", removing
a cast.
* output.h (get_insn_template): Likewise for 2nd param.
* rtl.h (emit_insn_before): Likewise.
(emit_jump_insn_before): Likewise.
(emit_debug_insn_before_noloc): Likewise.
(emit_insn_after): Likewise.
(emit_jump_insn_after): Likewise.
(emit_call_insn_after): Likewise.
(emit_debug_insn_after): Likewise.
(set_insn_deleted): Likewise for param.

From-SVN: r261715

re PR target/85358 (PowerPC: Using -mabi=ieeelongdouble -mcpu=power9 breaks __ibm128)

[gcc]
2018-06-18  Michael Meissner  <meissner@linux.ibm.com>

PR target/85358
* config/rs6000/rs6000-modes.def (toplevel): Rework the 128-bit
floating point modes, so that IFmode is numerically greater than
TFmode, which is greater than KFmode using FRACTIONAL_FLOAT_MODE
to declare the ordering.  This prevents IFmode from being
converted to TFmode when long double is IEEE 128-bit on an ISA 3.0
machine.  Include rs6000-modes.h to share the fractional values
between genmodes* and the rest of the compiler.
(IFmode): Likewise.
(KFmode): Likewise.
(TFmode): Likewise.
* config/rs6000/rs6000-modes.h: New file.
* config/rs6000/rs6000.c (rs6000_debug_reg_global): Change the
meaning of rs6000_long_double_size so that 126..128 selects an
appropriate 128-bit floating point type.
(rs6000_option_override_internal): Likewise.
* config/rs6000/rs6000.h (toplevel): Include rs6000-modes.h.
(TARGET_LONG_DOUBLE_128): Change the meaning of
rs6000_long_double_size so that 126..128 selects an appropriate
128-bit floating point type.
(LONG_DOUBLE_TYPE_SIZE): Update comment.
* config/rs6000/rs6000.md (trunciftf2): Correct the modes of the
source and destination to match the standard usage.
(truncifkf2): Likewise.
(copysign<mode>3, IEEE iterator): Rework copysign of float128 on
ISA 2.07 to use an explicit clobber, instead of passing in a
temporary.
(copysign<mode>3_soft): Likewise.

[libgcc]
2018-06-18  Michael Meissner  <meissner@linux.ibm.com>

* config/rs6000/t-float128 (FP128_CFLAGS_SW): Compile float128
support modules with -mno-gnu-attribute.
* config/rs6000/t-float128-hw (FP128_CFLAGS_HW): Likewise.

From-SVN: r261712

LWG 2989 hide path iostream operators from normal lookup

By only defining these operators as friends (with no namespace-scope
declaration) they can only be found by ADL and do not participate in
overload resolution for arguments of types other than path.

LWG 2989 hide path iostream operators from normal lookup
* include/bits/fs_path.h (operator<<, operator>>): Define inline as
friends.
* testsuite/27_io/filesystem/path/io/dr2989.cc: New.

From-SVN: r261711

Introduce DUMP_VECT_SCOPE macro

gcc/ChangeLog:
* tree-vect-data-refs.c (vect_analyze_data_ref_dependences):
Replace dump_printf_loc call with DUMP_VECT_SCOPE.
(vect_slp_analyze_instance_dependence): Likewise.
(vect_enhance_data_refs_alignment): Likewise.
(vect_analyze_data_refs_alignment): Likewise.
(vect_slp_analyze_and_verify_instance_alignment
(vect_analyze_data_ref_accesses): Likewise.
(vect_prune_runtime_alias_test_list): Likewise.
(vect_analyze_data_refs): Likewise.
* tree-vect-loop-manip.c (vect_update_inits_of_drs): Likewise.
* tree-vect-loop.c (vect_determine_vectorization_factor): Likewise.
(vect_analyze_scalar_cycles_1): Likewise.
(vect_get_loop_niters): Likewise.
(vect_analyze_loop_form_1): Likewise.
(vect_update_vf_for_slp): Likewise.
(vect_analyze_loop_operations): Likewise.
(vect_analyze_loop): Likewise.
(vectorizable_induction): Likewise.
(vect_transform_loop): Likewise.
* tree-vect-patterns.c (vect_pattern_recog): Likewise.
* tree-vect-slp.c (vect_analyze_slp): Likewise.
(vect_make_slp_decision): Likewise.
(vect_detect_hybrid_slp): Likewise.
(vect_slp_analyze_operations): Likewise.
(vect_slp_bb): Likewise.
* tree-vect-stmts.c (vect_mark_stmts_to_be_vectorized): Likewise.
(vectorizable_bswap): Likewise.
(vectorizable_call): Likewise.
(vectorizable_simd_clone_call): Likewise.
(vectorizable_conversion): Likewise.
(vectorizable_assignment): Likewise.
(vectorizable_shift): Likewise.
(vectorizable_operation): Likewise.
* tree-vectorizer.h (DUMP_VECT_SCOPE): New macro.

From-SVN: r261710

PR c++/86171 - ICE with recursive alias instantiation.

* pt.c (tsubst_decl): Handle recursive alias instantiation.

From-SVN: r261709

LWG 3050 Fix cv-qualification of convertibility constraints

LWG 3050 Fix cv-qualification of convertibility constraints
* include/std/chrono (duration, operator*, operator/, operator%): Use
const-qualified type as source type in is_convertible constraints.
* testsuite/20_util/duration/arithmetic/dr3050.cc: New.
* testsuite/20_util/duration/cons/dr3050.cc: New.
* testsuite/20_util/duration/literals/range.cc: Rename to...
* testsuite/20_util/duration/literals/range_neg.cc: Here. Adjust
dg-error lineno.

From-SVN: r261708

crossconfig.m4: Handle OpenBSD just like NetBSD.

2018-06-18  Maya Rashish  <coypu@sdf.org>

* crossconfig.m4: Handle OpenBSD just like NetBSD.
* configure: Rebuilt.

* config/alpha/openbsd.h (TARGET_DEFAULT): Define.
(LINK_SPEC, STARTFILE_SPEC, ENDFILE_SPEC): Likewise.
(INTMAX_TYPE, UINTMAX_TYPE, WINT_TYPE): Likewise.

* config/alpha/elf.h (STARTFILE_SPEC, ENDFILE_SPEC): Move from
here to ...
* config/alpha/linux.h (STARTFILE_SPEC, ENDFILE_SPEC): Here.

From-SVN: r261707

P0754R2 <version> header

* include/Makefile.am: Add new header.
* include/Makefile.in: Regenerate.
* include/bits/c++config: Change doxygen comment to suggest <version>
instead of <iosfwd>.
* include/precompiled/stdc++.h: Include <cwchar> and <cwctype>
unconditionally.  Add C++17 and C++20 headers.
* include/std/version: New header.
* testsuite/17_intro/headers/c++2017/all_attributes.cc: New.
* testsuite/17_intro/headers/c++2017/all_no_exceptions.cc: New.
* testsuite/17_intro/headers/c++2017/all_no_rtti.cc: New.
* testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc: New.
* testsuite/17_intro/headers/c++2017/operator_names.cc: New.
* testsuite/17_intro/headers/c++2017/stdc++.cc: New.
* testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
New.
* testsuite/17_intro/headers/c++2020/all_attributes.cc: New.
* testsuite/17_intro/headers/c++2020/all_no_exceptions.cc: New.
* testsuite/17_intro/headers/c++2020/all_no_rtti.cc: New.
* testsuite/17_intro/headers/c++2020/all_pedantic_errors.cc: New.
* testsuite/17_intro/headers/c++2020/operator_names.cc: New.
* testsuite/17_intro/headers/c++2020/stdc++.cc: New.
* testsuite/17_intro/headers/c++2020/stdc++_multiple_inclusion.cc:
New.
* testsuite/18_support/headers/version/macros.cc: New.
* testsuite/18_support/headers/version/macros.cc: New.

From-SVN: r261706

PR tree-optimization/81384 - built-in form of strnlen missing

gcc/ChangeLog:

PR tree-optimization/81384
* builtin-types.def (BT_FN_SIZE_CONST_STRING_SIZE): New.
* builtins.c (expand_builtin_strnlen): New function.
(expand_builtin): Call it.
(fold_builtin_n): Avoid setting TREE_NO_WARNING.
* builtins.def (BUILT_IN_STRNLEN): New.
* calls.c (maybe_warn_nonstring_arg): Handle BUILT_IN_STRNLEN.
Warn for bounds in excess of maximum object size.
* tree-ssa-strlen.c (maybe_set_strlen_range): Return tree representing
single-value ranges.  Handle strnlen.
(handle_builtin_strlen): Handle strnlen.
(strlen_check_and_optimize_stmt): Same.
* doc/extend.texi (Other Builtins): Document strnlen.

gcc/testsuite/ChangeLog:

PR tree-optimization/81384
* gcc.c-torture/execute/builtins/lib/strnlen.c: New test.
* gcc.c-torture/execute/builtins/strnlen-lib.c: New test.
* gcc.c-torture/execute/builtins/strnlen.c: New test.
* gcc.dg/attr-nonstring-2.c: New test.
* gcc.dg/attr-nonstring-3.c: New test.
* gcc.dg/attr-nonstring-4.c: New test.
* gcc.dg/strlenopt-45.c: New test.
* gcc.dg/strlenopt.h (strnlen):  Declare.

From-SVN: r261705

Fix bootstrap failure for bare metal due to autoconf link tests

The AC_CHECK_FUNCS tests cause the build to fail for bare metal cross
compilers, where link tests are not allowed. Replace them with
GCC_TRY_COMPILE_OR_LINK tests instead. Skip all the Filesystem
dependency checks if not building the filesystem library.

* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Only check when
enable_libstdcxx_filesystem_ts = yes. Check for link, readlink and
symlink.
* config.h.in: Regenerate.
* configure: Regenerate.
* configure.ac: Remove AC_CHECK_FUNCS for link, readlink and symlink.

From-SVN: r261704

LWG 3035. std::allocator's constructors should be constexpr

LWG 3035. std::allocator's constructors should be constexpr
* include/bits/allocator.h (allocator): Add constexpr to constructors
for C++2a. Replace dynamic exception specifications with NOTHROW
macro.
(allocator, operator==, operator!=): Replace USE_NOEXCEPT macro with
NOTHROW.
* include/bits/c++config (_GLIBCXX20_CONSTEXPR): Define.
* include/ext/malloc_allocator.h (malloc_allocator): Add constexpr
to constructors for C++2a.
* include/ext/new_allocator.h (new_allocator): Likewise.

From-SVN: r261703

decl.c (duplicate_decls): Consistently use DECL_SOURCE_LOCATION in errors about redefined default...

2018-06-18  Paolo Carlini  <paolo.carlini@oracle.com>

* decl.c (duplicate_decls): Consistently use DECL_SOURCE_LOCATION
in errors about redefined default arguments; tidy.

From-SVN: r261702

tree.c (escaped_string::escape): Replace cast to char * by const_cast<char *> (unescaped).

2018-06-18  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

* tree.c (escaped_string::escape): Replace cast to char * by
const_cast<char *> (unescaped).

From-SVN: r261700

[testsuite] Add target pthread to pr86076.c

Add missing target pthread to ensure test doesn't fail on bare-metal
targets. Committed as obvious.

    testsuite/
PR tree-optimization/86076
* gcc.dg/pr86076.c: Add target pthread for bare-metal targets.

From-SVN: r261699

[testsuite] Remove xfail from vect-abs-compile.c

Since PR64946 has been fixed, we can remove the xfail from this test.
Committed as obvious.

    testsuite/
PR tree-optimization/64946
* gcc.target/aarch64/vect-abs-compile.c: Remove xfail.

From-SVN: r261698

Ensure that control characters in user supplied error and warning messages are escaped.

PR 84195
* tree.c (escaped_string): New class.  Converts an unescaped
string into its escaped equivalent.
(warn_deprecated_use): Use the new class to convert the
deprecation message, if present.
(test_escaped_strings): New self test.
(test_c_tests): Add test_escaped_strings.

From-SVN: r261697

tree.c (decl_value_expr_lookup): Revert latest change.

* tree.c (decl_value_expr_lookup): Revert latest change.
(decl_value_expr_insert): Likewise.
fortran/
* trans-decl.c (gfc_get_fake_result_decl): Revert latest change.

From-SVN: r261696

Daily bump.

From-SVN: r261695

Remove superfluous prefix

From-SVN: r261688

gimplify.c (nonlocal_vlas): Delete.

* gimplify.c (nonlocal_vlas): Delete.
(nonlocal_vla_vars): Likewise.
(gimplify_var_or_parm_decl): Do not add debug VAR_DECLs for non-local
referenced VLAs.
(gimplify_body): Do not create and destroy nonlocal_vlas.
* tree-nested.c: Include diagnostic.h.
(use_pointer_in_frame): Tweak.
(lookup_field_for_decl): Add assertion and declare the transformation.
(convert_nonlocal_reference_op) <PARM_DECL>: Rework and issue an
internal error when the reference is in a wrong context.  Do not
create a debug decl by default.
(note_nonlocal_block_vlas): Delete.
(convert_nonlocal_reference_stmt) <GIMPLE_BIND>: Do not call it.
(convert_local_reference_op) <PARM_DECL>: Skip the frame decl.  Do not
create a debug decl by default.
(convert_gimple_call) <GIMPLE_CALL>: Issue an internal error when the
call is in a wrong context.
(fixup_vla_decls): New function.
(finalize_nesting_tree_1): Adjust comment.  Call fixup_vla_decls if no
debug variables were created.
* tree.c (decl_value_expr_lookup): Add checking assertion.
(decl_value_expr_insert): Likewise.
fortran/
* fortran/trans-decl.c (nonlocal_dummy_decl_pset): Delete.
(nonlocal_dummy_decls): Likewise.
(gfc_nonlocal_dummy_array_decl): Likewise.
(gfc_get_symbol_decl): Do not call gfc_nonlocal_dummy_array_decl.
(gfc_get_fake_result_decl): Do not generate a new DECL if simply
reusing the result of a recursive call.
(gfc_generate_function_code): Do not create, insert and destroy
nonlocal_dummy_decls.

From-SVN: r261687

Daily bump.

From-SVN: r261686

re PR middle-end/82479 (missing popcount builtin detection)

gcc/ChangeLog:

2018-06-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

PR middle-end/82479
* ipa-fnsummary.c (will_be_nonconstant_expr_predicate): Handle CALL_EXPR.
* tree-scalar-evolution.c (interpret_expr): Likewise.
(expression_expensive_p): Likewise.
* tree-ssa-loop-ivopts.c (contains_abnormal_ssa_name_p): Likewise.
* tree-ssa-loop-niter.c (number_of_iterations_popcount): New.
(number_of_iterations_exit_assumptions): Use number_of_iterations_popcount.
(ssa_defined_by_minus_one_stmt_p): New.

gcc/testsuite/ChangeLog:

2018-06-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

PR middle-end/82479
* gcc.dg/tree-ssa/popcount.c: New test.
* gcc.dg/tree-ssa/popcount2.c: New test.

From-SVN: r261682

re PR tree-optimization/64946 ([AArch64] gcc.target/aarch64/vect-abs-compile.c - "abs" vectorization fails for char/short types)

gcc/ChangeLog:

2018-06-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

PR middle-end/64946
* cfgexpand.c (expand_debug_expr): Hande ABSU_EXPR.
* config/i386/i386.c (ix86_add_stmt_cost): Likewise.
* dojump.c (do_jump): Likewise.
* expr.c (expand_expr_real_2): Check operand type's sign.
* fold-const.c (const_unop): Handle ABSU_EXPR.
(fold_abs_const): Likewise.
* gimple-pretty-print.c (dump_unary_rhs): Likewise.
* gimple-ssa-backprop.c (backprop::process_assign_use): Likesie.
(strip_sign_op_1): Likesise.
* match.pd: Add new pattern to generate ABSU_EXPR.
* optabs-tree.c (optab_for_tree_code): Handle ABSU_EXPR.
* tree-cfg.c (verify_gimple_assign_unary): Likewise.
* tree-eh.c (operation_could_trap_helper_p): Likewise.
* tree-inline.c (estimate_operator_cost): Likewise.
* tree-pretty-print.c (dump_generic_node): Likewise.
* tree-vect-patterns.c (vect_recog_sad_pattern): Likewise.
* tree.def (ABSU_EXPR): New.

gcc/c-family/ChangeLog:

2018-06-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

* c-common.c (c_common_truthvalue_conversion): Handle ABSU_EXPR.

gcc/c/ChangeLog:

2018-06-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

* c-typeck.c (build_unary_op): Handle ABSU_EXPR;
* gimple-parser.c (c_parser_gimple_statement): Likewise.
(c_parser_gimple_unary_expression): Likewise.

gcc/cp/ChangeLog:

2018-06-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

* constexpr.c (potential_constant_expression_1): Handle ABSU_EXPR.
* cp-gimplify.c (cp_fold): Likewise.

gcc/testsuite/ChangeLog:

2018-06-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

PR middle-end/64946
* gcc.dg/absu.c: New test.
* gcc.dg/gimplefe-29.c: New test.
* gcc.target/aarch64/pr64946.c: New test.

From-SVN: r261681

re PR middle-end/86095 (documentation for -Wunsafe-loop-optimizations references options which have no effect any more)

PR middle-end/86095
* common.opt (Wunsafe-loop-optimizations): Add Ignore, remove Var,
documented as preserved for backward compatibility only.
* doc/invoke.texi: Remove -Wunsafe-loop-optimizations documentation.

From-SVN: r261679

re PR rtl-optimization/86108 (crash during unwinding with -O2)

PR rtl-optimization/86108
* bb-reorder.c (create_forwarder_block): Renamed to ...
(create_eh_forwarder_block): ... this.  Split OLD_BB after labels and
jump from new landing pad to the second part.
(sjlj_fix_up_crossing_landing_pad, dw2_fix_up_crossing_landing_pad):
Adjust callers.

From-SVN: r261678

PR c++/86147 - wrong capture for template argument.

* expr.c (mark_use): Look through NOP_EXPR.

From-SVN: r261676

config.guess: Import latest version.

* config.guess: Import latest version.
* config.sub: Likewise.

From-SVN: r261675

Daily bump.

From-SVN: r261674

LWG 3076 basic_string CTAD ambiguity

When deduction guides are supported by the compiler (i.e. for C++17 and
later) replace two basic_string constructors by constrained function
templates as required by LWG 3075. In order to ensure that the pre-C++17
non-template constructors are still exported from the shared library
define a macro in src/c++11/string-inst.cc to force the non-template
declarations (this isn't strictly needed yet, because the string
instantiations are compiled with -std=gnu++11, but that is likely to
change).

LWG 3076 basic_string CTAD ambiguity
* doc/xml/manual/intro.xml: Document LWG 3076 change.
* include/bits/basic_string.h
[__cpp_deduction_guides && !_GLIBCXX_DEFINING_STRING_INSTANTIATIONS]
(basic_string(const _CharT*, const _Alloc&)): Turn into a function
template constrained by _RequireAllocator.
(basic_string(size_type, _CharT, const _Alloc&)): Likewise.
* src/c++11/string-inst.cc (_GLIBCXX_DEFINING_STRING_INSTANTIATIONS):
Define.
* testsuite/21_strings/basic_string/cons/char/deduction.cc: Test
deduction
* testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
Likewise.

From-SVN: r261670

re PR c/86093 (volatile ignored on pointer in C)

PR c/86093
* c-typeck.c (pointer_diff): Cast both pointers to unqualified types
before doing POINTER_DIFF_EXPR.

* c-c++-common/pr86093.c: New test.

From-SVN: r261663

re PR middle-end/85878 (ICE in convert_mode_scalar, at expr.c:287)

PR middle-end/85878
* expr.c (expand_assignment): Remove now redundant COMPLEX_MODE_P
check from first store_expr, use to_mode instead of GET_MODE (to_rtx).
Only call store_expr for halves if the mode is the same.

* gfortran.fortran-torture/compile/pr85878.f90: New test.

From-SVN: r261659

pt.c (tsubst_default_argument): Use push_to/pop_from_top_level.

* pt.c (tsubst_default_argument): Use push_to/pop_from_top_level.

* name-lookup.c (do_pushtag): Don't look through complete types, but
don't add to them either.  Get context from current_binding_level.

From-SVN: r261656

* decl.c (start_enum): Do compare dependent underlying type.

From-SVN: r261655

PR c++/82882 - ICE with lambda in template default argument.

* lambda.c (record_null_lambda_scope): New.
* pt.c (tsubst_lambda_expr): Use it.
* name-lookup.c (do_pushtag): Don't give a lambda DECL_CONTEXT of a
function that isn't open.

From-SVN: r261654

* tree.c (maybe_warn_parm_abi): Inform the location of the class.

From-SVN: r261653

re PR middle-end/86123 (ICE in prepare_cmp_insn, at optabs.c:3967)

PR middle-end/86123
* match.pd ((X / Y) == 0 -> X < Y): Don't transform complex divisions.
Fix up comment formatting.

* gcc.c-torture/compile/pr86123.c: New test.

From-SVN: r261647

typed-splay-tree.h (typed_splay_tree::remove): New function.

2018-06-15  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * typed-splay-tree.h (typed_splay_tree::remove): New function.
        (typed_splay_tree::closure,
        typed_splay_tree::inner_foreach_fn, typed_splay_tree::m_inner): Deleted.
        (typed_splay_tree::typed_splay_tree,
        typed_splay_tree::operator =): Declared private.
        (typed_splay_tree::splay_tree_key, typed_splay_tree::splay_tree_value,
        typed_splay_tree::splay_tree_node_s, typed_splay_tree::KDEL,
        typed_splay_tree::VDEL, typed_splay_tree::splay_tree_delete_helper,
        typed_splay_tree::rotate_left, typed_splay_tree::rotate_right,
        typed_splay_tree::splay_tree_splay,
        typed_splay_tree::splay_tree_foreach_helper,
        typed_splay_tree::splay_tree_insert,
        typed_splay_tree::splay_tree_remove,
        typed_splay_tree::splay_tree_lookup,
        typed_splay_tree::splay_tree_predecessor,
        typed_splay_tree::splay_tree_successor,
        typed_splay_tree::splay_tree_min,
        typed_splay_tree::splay_tree_max): Took over from splay-tree.c/.h.
        (typed_splay_tree::root, typed_splay_tree::comp,
        typed_splay_tree::delete_key,
        typed_splay_tree::delete_value): New data members.
        * typed-splay-tree.c (selftest::test_str_to_int): Add a test for
        typed_splay_tree::remove.

From-SVN: r261645

[testsuite] Run dg-final.exp sequentially

2018-06-15  Tom de Vries  <tdevries@suse.de>

* gcc.dg-selftests/dg-final.exp: Force sequential execution.

From-SVN: r261643

PR libstdc++/86169 unshare COW string when non-const data() called

PR libstdc++/86169
* include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
(basic_string::data()): Unshare string.
* testsuite/21_strings/basic_string/operations/data/char/86169.cc:
New.

From-SVN: r261642

Decorate string_view members with nonnull attribute

The C++ committee has confirmed that passing a null pointer to the
unary basic_string_view constructor is undefined. This removes the check
from our implementation, and adds the nonnull attribute to warn when the
compiler can detect undefined input.

* include/std/string_view (basic_string_view(const CharT*)): Remove
check for null pointer and add nonnull attribute.
(compare(const CharT*), compare(size_type, size_type, const CharT*))
(find(const CharT*, size_type), rfind(const CharT*, size_type))
(find_first_of(const CharT*, size_type))
(find_last_of(const CharT*, size_type))
(find_first_not_of(const CharT*, size_type))
(find_last_not_of(const CharT*, size_type)): Add nonnull attribute.
* testsuite/21_strings/basic_string_view/cons/char/nonnull.cc: New.
* testsuite/21_strings/basic_string_view/operations/compare/char/
nonnull.cc: New.
* testsuite/21_strings/basic_string_view/operations/find/char/
nonnull.cc: New.
* testsuite/21_strings/basic_string_view/operations/rfind/char/
nonnull.cc: New.

From-SVN: r261638

PR libstdc++/86168 fix ambiguous default constructor

PR libstdc++/86168
* include/bits/random.h (random_device(const string&)): Remove
default argument.

From-SVN: r261636

MIPS: Add support for -mcrc and -mginv options.

gcc/ChangeLog:

2018-06-15  Matthew Fortune  <matthew.fortune@mips.com>

* config/mips/mips.h (ASM_SPEC): Pass through -mcrc, -mno-crc,
-mginv and -mno-ginv to the assembler.
* config/mips/mips.opt (-mcrc): New option.
(-mginv): Likewise.
* doc/invoke.text (-mcrc): Document.
(-mginv): Likewise.

From-SVN: r261635

Only define __cpp_lib_constexpr_char_traits for C++17

* include/bits/char_traits.h (__cpp_lib_constexpr_char_traits): Only
define for C++17 and above.

From-SVN: r261634

Force user provided warning and error messages to only occupy one line.

  PR 84195
gcc:  * tree.c (escaped_string): New class.  Converts an unescaped
  string into its escaped equivalent.
  (warn_deprecated_use): Use the new class to convert the
  deprecation message, if present.
  (test_escaped_strings): New self test.
  (test_c_tests): Add test_escaped_strings.
  * doc/extend.texi (deprecated): Add a note that the
  deprecation message is affected by the -fmessage-length
  option, and that control characters will be escaped.
  (#pragma GCC error): Document this pragma.
  (#pragma GCC warning): Likewise.
  * doc/invoke.texi (-fmessage-length): Document this option's
  effect on the #warning and #error preprocessor directives and
  the deprecated attribute.

testsuite;
  * gcc.c-torture/compile/pr84195.c: New test.

From-SVN: r261633

LWG 2993 reference_wrapper<T> conversion from T&&

* doc/xml/manual/intro.xml: Document LWG 2993 change.
* include/bits/refwrap.h (reference_wrapper(_Tp&)): Remove.
(reference_wrapper(_Tp&&)): Remove.
(reference_wrapper<_Up>(_Up&&)): Define new constructor as constrained
template.
(reference_wrapper): Add deduction guide.
* testsuite/20_util/reference_wrapper/deduction.cc: New.
* testsuite/20_util/reference_wrapper/lwg2993.cc: New.

From-SVN: r261632

tree-vect-slp.c (vect_slp_bb): Dump MSG_OPTIMIZED_LOCATIONS here, also noting vector size used.

2018-06-15  Richard Biener  <rguenther@suse.de>

* tree-vect-slp.c (vect_slp_bb): Dump MSG_OPTIMIZED_LOCATIONS
here, also noting vector size used.
* tree-vectorizer.c (vectorize_loops): Adjust.  Note vector
size used in MSG_OPTIMIZED_LOCATIONS dump.
(pass_slp_vectorize::execute): Adjust.

From-SVN: r261626

[ARC] Fix warning in arc_return_address_register.

The if condition in arc_return_address_register which selects the arc
return address is not correct. The issue is signalized in bugzilla 85968.

gcc/
2018-06-15  Claudiu Zissulescu  <claziss@synopsys.com>

* config/arc/arc.c (arc_return_address_register): Fix if-condition.

From-SVN: r261623

re PR tree-optimization/86159 (g++ ICE at -O1 and above on valid code: incorrect type of vector CONSTRUCTOR elements)

2018-06-15  Richard Biener  <rguenther@suse.de>

PR middle-end/86159
* tree-cfg.c (gimplify_build3): Do not strip sign conversions,
leave useless conversion stripping to force_gimple_operand_gsi.
(gimplify_build2): Likewise.
(gimplify_build1): Likewise.

* g++.dg/pr86159.C: New testcase.

From-SVN: r261622

re PR tree-optimization/86076 (ICE: verify_gimple failed (error: location references block not in block tree))

2018-06-15  Richard Biener  <rguenther@suse.de>

PR middle-end/86076
* tree-cfg.c (move_stmt_op): unshare invariant addresses
before adjusting their block.

* gcc.dg/pr86076.c: New testcase.

From-SVN: r261620

RISC-V: Add custom RTEMS multilibs

Add multilib variants for -march=rv64imafd, e.g. to support the BOOMv2 core.

Add -mcmodel=medany as a variant of the 64-bit multilibs for RTEMS.  The
rationale for this change is that several existing RISC-V chips map the
RAM at 0x80000000.  In RTEMS, we do not use virtual memory, so
applications will run at this location which is outside the +-2GiB range
in a 64-bit configuration.

gcc/
* config.gcc (riscv*-*-elf* | riscv*-*-rtems*): Use custom
multilibs for *-*-rtems*.
* config/riscv/t-rtems: New file.

From-SVN: r261619

LWG 3039 Unnecessary decay in thread and packaged_task

* include/std/future (__constrain_pkgdtask): Replace with ...
(packaged_task::__not_same): New alias template, using
__remove_cvref_t instead of decay.
* include/std/thread (thread::__not_same): Add comment.

From-SVN: r261618

Daily bump.

From-SVN: r261617

re PR c++/86063 (g++ ICE at  tree check: expected tree_list, have expr_pack_expansion in cp_check_const_attributes, at cp/decl2.c:1391)

PR c++/86063
* decl2.c (cp_check_const_attributes): Skip trees that are not
TREE_LISTs.

* g++.dg/cpp0x/gen-attrs-65.C: New test.

From-SVN: r261613

LWG 3075 basic_string needs deduction guides from basic_string_view

* testsuite/21_strings/basic_string/cons/char/deduction.cc: Test
deduction from string views.
* testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
Likewise.

From-SVN: r261612

LWG 3074 make scalar types non-deduced in valarray non-member functions

* include/bits/valarray_after.h (_DEFINE_EXPR_BINARY_FUNCTION): Change
scalar parameters to be a non-deduced context.
* include/std/valarray (_DEFINE_BINARY_OPERATOR): Likewise. Adjust
whitespace.
* testsuite/26_numerics/valarray/operators.cc: Test scalar operands.
* testsuite/26_numerics/valarray/transcend.cc: New.

From-SVN: r261610

re PR target/86048 (.seh_savexmm offset is negative error when compiling libpng)

PR target/86048
* gcc.target/i386/pr86048.c: Require sse2 effective target.  Add
-msse2 to dg-options.

From-SVN: r261608

re PR middle-end/86122 (ICE in useless_type_conversion_p, at gimple-expr.c:87)

PR middle-end/86122
* match.pd ((A +- CST1) +- CST2): Punt if last resort
unsigned_type_for returns NULL.

* gcc.c-torture/compile/pr86122.c: New test.

From-SVN: r261606

P0624R2 - Default constructible and assignable stateless lambdas

P0624R2 - Default constructible and assignable stateless lambdas
* method.c (synthesized_method_walk): For C++2a don't mark
sfk_constructor or sfk_copy_assignment as deleted if lambda has
no lambda-captures.

* g++.dg/cpp2a/lambda1.C: New test.
* g++.dg/cpp0x/lambda/lambda-ice2.C: Adjust expected diagnostics
for -std=c++2a.

From-SVN: r261605

Partially revert move of std::tuple_element_t to <tuple>

Defining std::tuple_element_t in <utility> makes it available wherever
std::tuple_element is available.

* include/std/tuple (__cpp_lib_tuple_element_t, tuple_element_t):
Move back to <utility>.
* include/std/utility (__cpp_lib_tuple_element_t. tuple_element_t):
Restore to here.

From-SVN: r261604

decl.c (duplicate_decls): Use DECL_SOURCE_LOCATION in OPT_Wshadow warning_at.

/cp
2018-06-14  Paolo Carlini  <paolo.carlini@oracle.com>

* decl.c (duplicate_decls): Use DECL_SOURCE_LOCATION in
OPT_Wshadow warning_at.
(grokfndecl): Consistently use the location_t argument in
literal operator diagnostic messages.
(grokdeclarator): Use declspecs->locations[ds_storage_class]
in error_at call.
* decl2.c (finish_static_data_member_decl): Use DECL_SOURCE_LOCATION
in permerror call.

/testsuite
2018-06-14  Paolo Carlini  <paolo.carlini@oracle.com>

* g++.dg/other/static3.C: New.
* g++.dg/other/static4.C: Likewise.
* g++.dg/warn/Wshadow-15.C: Likewise.
* g++.dg/cpp0x/gnu_fext-numeric-literals.C: Test locations too.
* g++.dg/cpp0x/std_fext-numeric-literals.C: Likewise.
* g++.dg/cpp0x/std_fno-ext-numeric-literals.C: Likewise.
* g++.dg/cpp0x/udlit-args-neg.C: Likewise.
* g++.dg/cpp0x/udlit-clink-neg.C: Likewise.
* g++.dg/cpp0x/udlit-extern-c.C: Likewise.
* g++.dg/cpp0x/udlit-member-neg.C: Likewise.

From-SVN: r261601

P0935R0 Eradicating unnecessarily explicit default constructors

More pieces of P0935R0, making default constructors non-explicit.

* include/backward/strstream (strstreambuf): Add non-explicit default
constructor.
* include/bits/locale_conv.h (wbuffer_convert, wstring_convert):
Likewise.
* include/bits/regex.h (match_results): Likewise.
* testsuite/22_locale/conversions/buffer/1.cc: Test for non-explicit
default constructor.
* testsuite/22_locale/conversions/string/1.cc: Likewise.
* testsuite/28_regex/match_results/ctors/char/default.cc: Likewise.
* testsuite/28_regex/match_results/ctors/wchar_t/default.cc: Likewise.

From-SVN: r261597

Define __cpp_lib_tuple_element_t in <tuple> not <utility>

* include/std/tuple (__cpp_lib_tuple_element_t): Move feature test
macro from <utility> and change type to long.
* include/std/utility (__cpp_lib_tuple_element_t): Remove.
* testsuite/20_util/tuple/tuple_element_t.cc: Check for feature test
macro.

From-SVN: r261596